Latest online resources for UI for ASP.NET AJAX

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  1. Marin Bratanov
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    Marin Bratanov avatar
    5128 posts

    Posted 28 Aug 2018 Link to this post

    RadEditor for ASP.NET AJAX
    Set default font for the content area and Font Name dropdown
    The article explains how to configure the default font not only for the content area, but also for the Font Name dropdown and its header.

    Keyboard Support Overview
    Added information how to handle the CMD key on a Mac like Ctrl on Windows.

    Using ToolsFile.xml
    Added information how to handle the CMD key on a Mac like Ctrl on Windows.

    RadSpreadsheet for ASP.NET AJAX
    Full Screen Mode
    An example that shows how to use the available browser API to put an element (in this case the RadSpreadsheet) in full screen mode so it occupies the entire monitor.
  2. Marin Bratanov
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    5128 posts

    Posted 04 Sep 2018 Link to this post

    RadClientExportManager for ASP.NET AJAX
    Download Failed - Network Error when exporting a lot of data
    You might experience a network Download Failed network error in Chrome when trying to export a large amount of data from the browser using the Client Export Manager. Check out the blog post to learn how to solve the problem.

    RadComboBox for ASP.NET AJAX
    RadComboBox ItemTemplate and Checkbox on different lines
    ItemTemplate and CheckBox are on different lines.

    RadDatePicker for ASP.NET AJAX
    RadDatePicker binding to dates outside Min/Max range
    Binding RadDatePicker to value outside Min/Max range.

    RadGrid for ASP.NET AJAX
    Display Group Name and Header Text in Columns Header Context Menu
    Two examples of how to change the text of the header context menu items that show the column headers. This can help when you have multi-column headers so users can distinguish columns with matching header texts.

    RadLabel for ASP.NET AJAX
    Positioning the RequiredMark of RadLabel
    An example describing how to position the RequiredMark of the RadLabel using CSS.
  3. Marin Bratanov
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    5128 posts

    Posted 11 Sep 2018 Link to this post

    RadBarcode for ASP.NET AJAX
    QRCode
    Explanations on how to control the size of the QR code were added.

    RadComboBox for ASP.NET AJAX
    Resize ComboBox input to show all of the selected item text
    Resize the ComboBox element to show the whole selected item similar to the DropDownAutoWidth functionality.

    RadEditor for ASP.NET AJAX
    Begin typing without the styles from newly inserted formatting by the pasteHtml method to be applied to user input text
    See how to manipulate the selection in the content area after executing the pasteHtml method.

    RadGrid for ASP.NET AJAX
    Google Like filtering for RadGrid
    Isolated version of RadGrid Google-Like filtering

    Setting 100% height and resize on container resize for grid with scrolling and static headers
    Autoresize the grid to fit its parent container.

    Page for client-side export
    Shows how you can manipulate the DOM and put certain records of the grid on new pages when exporting to PDF on the client. Also shows how you can generate small reports on the client by disabling server paging.

    RadHtmlChart for ASP.NET AJAX
    Axes Configuration
    Added the new Position property that controls where the axis labels will be rendered (available as of R3 2018).
  4. Marin Bratanov
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    5128 posts

    Posted 18 Sep 2018 Link to this post

    RadClientExportManager for ASP.NET AJAX
    Known Limitations
    Removed the limitation of exporting RadHtmlChart controls with page breaks, it was resolved in R3 2018.

    RadGrid for ASP.NET AJAX
    Migration from RadGrid for ASP.NET (Classic) to RadGrid for ASP.NET AJAX
    The article will guide you through the process of upgrading RadGrid Classic to RadGrid for ASP.NET AJAX

    RadHtmlChart for ASP.NET AJAX
    Multiline Labels
    Added information how escaping the new line sequence works in the server code.

    RadHtmlChart cannot be bound to a data source that has special characters in its field names.
    Improved information on what data source field names cannot be used.

    Increase the Chart Plotted area to utilize the blank space
    The article shows how to decrease the available empty space inside the plotted area.

    RadImageGallery for ASP.NET AJAX
    Keep Image Ratio on Browser Window Resize
    Keeping the image ratio when resizing the browser window when you want to show a banner-like gallery on the top of the page.

    RadScriptManager for ASP.NET AJAX
    Combining External Scripts
    Added information on caching.

    RadSearchBox for ASP.NET AJAX
    Ensure an item is selected when searching with SearchBox
    Force item selection by preventing OnSearch event if there is no item selected.

    RadSpreadsheet for ASP.NET AJAX
    Load Excel file into a read-only Spreadsheet
    Create a read-only Spreadsheet loaded from Excel file.

    Server-side Programming
    Added information when you can use the server-side Sheets collection of a RadSpreadsheet instance.

    RadStyleSheetManager for ASP.NET AJAX
    Serving External Style Sheets
    Added information on cache busting.
  5. Marin Bratanov
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    5128 posts

    Posted 25 Sep 2018 Link to this post

    RadCloudUpload for ASP.NET AJAX
    Azure Blob Storage
    Updated information about the needed Azure assemblies versions and package versions.

    RadComboBox for ASP.NET AJAX
    Adding Images to Items
    Added information how to control the alt attribute of the images the combo renders.

    RadEditor for ASP.NET AJAX
    Include both the HEX and RGB colors in the produced markup
    See how to implement a custom content filter, which will make sure that the HEX and RGB color values are part of the produced content.

    RadGrid for ASP.NET AJAX
    Export DataRow from Selected Grid row to Excel on Button Click
    This project shows how to: - Select a row in RadGrid; - Press an external button; - In the button click event get the DataRow from the selected row; - Export the DataRow of the selected row to an Excel file

    RadMenu for ASP.NET AJAX
    Using a stack of RadMenus vertically aligned
    Code library showing how to apply CSS style for a stack of RadMenu's vertically aligned.

    Update info and examples to show how to add items in RadMenu with Mobile render mode
    var menu = $find("<%= RadMenu1.ClientID %>"); var menuItemClass = Telerik.Web.UI.RadMenuItem || Telerik.Web.UI.MobileMenuItem; var childItem = new menuItemClass(); childItem.set_text("New"); menu.get_items().add(childItem);

    RadStyleSheetManager for ASP.NET AJAX
    Known Limitations
    Added information about unnecessary reloading of resources
  6. Marin Bratanov
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    5128 posts

    Posted 03 Oct 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Disable the Compatibility View mode of Internet Explorer
    Learn how to easily disable the compatibility mode of your Internet Explorer browser!

    RadAutoCompleteBox for ASP.NET AJAX
    Allow to select only one text item or a single token item in RadAutoCompleteBox
    The AutoCompleteBox is designed to allow users to select many items. Nevertheless, the following approach will achieve the single selection functionality.

    RadEditor for ASP.NET AJAX
    Set focus to RadEditor body on click of Tab of previous control
    The article demonstrates how to apply the tabIndex attribute over the content area and disable the InsertTab and InsertShiftTab shortcuts of the control.

    Configure RadEditor Statistics Module to update on paste and key up
    Shows how to override the built-in functionality of the Statistics module to work on key up and paste events.

    RadGantt for ASP.NET AJAX
    Create a custom Time Marker similar to the Current Time Marker in Gantt
    Create a custom Time Marker similar to the Current Time Marker in the Gantt - Current Time Marker demo https://demos.telerik.com/aspnet-ajax/gantt/examples/functionality/currenttimemarker/defaultcs.aspx

    RadSpreadsheet for ASP.NET AJAX
    Open a RadWindow when clicking a link in a Spreadsheet cell
    When clicking on a link in a cell, open the content in a RadWindow instead of navigating away.
  7. Marin Bratanov
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    5128 posts

    Posted 09 Oct 2018 Link to this post

    RadAjax for ASP.NET AJAX
    Could not find an event named XYZ on associated control ABC for the trigger in Update Panel
    Learn how to fix the popular error applicable for the RadAjaxManager and asp:UpdatePanel components.

    RadDatePicker for ASP.NET AJAX
    How to use Thailand Calendar in RadDatePicker
    The Telerik calendar controls support only Gregorian calendars, yet this may be a workaround for some other calendars as well.

    RadDiagram for ASP.NET AJAX
    How to show all diagram items so they fit in the viewport
    How to fit the entire diagram for display without worrying about its size.

    Change Shape Visual Template Dynamically
    See how to change the shape’s Visual Template dynamically (e.g. on a shape click).

    RadEditor for ASP.NET AJAX
    No FONT tags are applied when I type text in the editor
    Yet another solution was provided for the case.

    Hide RadEditor Tooltip when ContentAreaMode is Div
    See how to remove the tooltip when hovering on the div content area of RadEditor.

    RadGrid for ASP.NET AJAX
    Select cells in RadGrid with Hierarchy
    Code Library sample to demonstrate how to select cells in RadGrid and its DetailTables using client-side (JavaScript) logic.

    Show or Hide Multi-Column RadGrid Headers on Client-Side
    This sample demonstrates how to toggle the visibility state of entire ColumnGroups using client-side logic.

    Adding a custom validator explicitly
    These steps will guide you through the process of adding custom validator to GridBoundColumn.

    RadHtmlChart for ASP.NET AJAX
    Add Title to RadHtmlChart Legend
    Useful in scenarios in which you need a title specific to the Series names listed in the RadHtmlChart Legend

    RadListView for ASP.NET AJAX
    Infinite Scrolling with RadListView
    This sample demonstrates how you can achieve infinite scrolling with RadListView.

    RadTreeList for ASP.NET AJAX
    Aggregates
    Aggregates are not supported with load-on-demand.
  8. Marin Bratanov
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    5128 posts

    Posted 17 Oct 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Use cookies to help execute custom JavaScript after a file starts to download
    This article shows how to use cookies to simulate an event triggered when the file starts downloading.

    RadAjax for ASP.NET AJAX
    Placeholder is not updated by RadAjaxManager
    How to use Placeholder controls in RadAjaxManager settings.

    RadCalendar for ASP.NET AJAX
    How to make the Today button to actually select the date
    In order to enable the Today button to make an actual date selection, you can make avail of the EnableTodayButtonSelection property.

    RadClientExportManager for ASP.NET AJAX
    Known Limitations
    Added information on page break limitations

    Export Multiple Elements from the Page at Once
    An example showing how to utilize deferreds and the Kendo Drawing API to put several disparate elements from the web page into a single exported PDF document (on separate pages).

    RadComboBox for ASP.NET AJAX
    How to select item with Load On Demand enabled
    Accessing the items with load-on-demand may be tricky and the best place to get them in order to pre-select one is the OnClientItemsRequested event.

    RadDeviceDetectionFramework for ASP.NET AJAX
    RadDeviceDetectionFramework
    Added information how the data is obtained and what may cause slight inaccuracies in some rare cases like iPhones.

    RadDiagram for ASP.NET AJAX
    Connection touches or crosses shape or connection
    How to reduce the chance of connections crossing/touching a shape or connection.

    RadDropDownList for ASP.NET AJAX
    DropDownList with a free text field
    How to allow free text in a dropdown option so you can carry it as Value of the dropdown to the server.

    RadEditor for ASP.NET AJAX
    Hide RadEditor Tooltip when ContentAreaMode is Div
    See how to remove the tooltip when hovering on the div content area of RadEditor.

    Unable to enter Percent % symbol with French keyboard in the Image Options dialog
    See how to overcome the inability to enter percent sigh when typing in French in the Width and Height fields of the Image Options dialog.

    Get the content area object of RadEditor with a single JS function regardless of the ContentAreaMode value
    The article provides a common function for getting reference to the div or iframe content area of the control.

    set_html() method
    You should avoid calling set_html() when the editor is in preview mode to avoid errors.

    RadGauge for ASP.NET AJAX
    RadGauge with 'display: none' does not render properly
    See how to fix the RadGauge dimensions after being initially hidden and shown on the page.

    RadGrid for ASP.NET AJAX
    Keep popup edit form next to edited item
    How to keep the grid popup edit form right below the item that is being edited

    RadGrid NestedViewTemplate Hierarchy with Programmatic Binding and Accessing Controls
    This sample demonstrates the proper way of programmatic binding of RadGrid hierarchy with NestedViewTemplate and accessing controls which are residing inside the nested template.

    Display Detail Table Total Aggregates in the Parent Item of RadGrid Hierarchy
    This sample demonstrates a hierarchy grid with a calculated column in its master table, which displays the sum (or any other defined Aggregate as a matter of fact) of values in the detail tables.

    Reset RadGrid state
    When you want your grid to return to its clean and tidy initial state, you can clear its applied settings manually. 

    CheckBoxes are not visible in RadGrid
    You can try these suggestions to fix the appearance of the CheckBoxes.

    Determine insert or edit mode in RadGrid with Batch editing
    There are scenarios where it might be helpful to know whether the currently opened grid cell in Batch editing is from a new row or already existing one.

    How to prevent ungrouping columns even from the group panel
    You can prefer the grouping structure to remain unchanged and hence the user shouldn't be able to drag a field from the group panel to ungroup.

    RadMap for ASP.NET AJAX
    Customizing Markers in RadMap
    Update article to include the new CSS class generated for custom markers as of R3 2018: k-i-marker-my-custom-shape

    RadOrgChart for ASP.NET AJAX
    OrgChart connecting lines are missing when browser is zoomed
    When changing the zoom level of the browser, the connecting lines of the OrgChart are missing.

    RadSpreadsheet for ASP.NET AJAX
    Show messages to user after response from saving the Spreadsheet
    Update article to show how to carry the message from the server via cookies

     
  9. Marin Bratanov
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    5128 posts

    Posted 23 Oct 2018 Link to this post

    RadAjax for ASP.NET AJAX
    RadAjax and WebUserControls
    Added example how to handle AjaxRequest server-side event in a user control. Improved overall readability and information quality.

    RadEditor for ASP.NET AJAX
    Enabling RadEditor in SharePoint
    KB article with how-to videos for using RadEditor in SharePoint

    RadGrid for ASP.NET AJAX
    Validation
    The grid does not have a default validation group, so if you set one for your validators (like those in a template column), make sure to set it to the grid as well. Also updated article to list default values.

    RadListView for ASP.NET AJAX
    Extracting values from a selected item
    Added a note about the ExtractValues usage.

    RadScheduler for ASP.NET AJAX
    Configure TimelineView of RadScheduler to behave and appear as WeekView
    By configuring the TimelineView similar to the WeekView, you can use it as a table with tasks for various days, without the hour rows of the WeekView.

    Theme Builder for ASP.NET AJAX
    Theme Builder for ASP.NET AJAX
    General improvements on the guide.

    RadToolBar for ASP.NET AJAX
    RadToolbar is not responsive when placed inside CommandItemTemplate of Grid
    Toolbar loses its responsiveness when placed inside the CommandItemTemplate of a responsive RadGrid. This article shows how to overcome this expected behavior.

    RadTreeView for ASP.NET AJAX
    TreeView ContextMenu not showing or immediately collapsing on mobile devices
    When you long press a TreeView node, the context menu shows, but when you lift your finger, the node is selected and the context menu hides.

    RadZipLibrary for ASP.NET AJAX
    Download Multiple Files in a Single Archive with RadZipLibrary
    This sample demonstrates how to download multiple files from various formats within a single .zip archive.
  10. Marin Bratanov
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    5128 posts

    Posted 29 Oct 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Page Transition Animation
    When you click a menu or otherwise navigate to another page, you can show a loading sign for the user on both pages so they do not feel like they are leaving the current one, and you can avoid the blank/frozen screen.

    RadAutoCompleteBox for ASP.NET AJAX
    AutoCompleteBox to remain with open dropdown to allow multiselection
    Configure the AutoCompleteBox imitate the behavior of the Kendo UI MultiSelect widget by allowing the selection of multiple items without closing the dropdown on item click.

    RadDateTimePicker for ASP.NET AJAX
    Prevent Time Getting Reset to 12:00 AM Midnight in RadDateTimePicker
    It may happen that even when the user selects a time slot explicitly from the timeview pop-up, the time still to be set and remain at 12:00 AM.

    Set Default Time to RadDateTimePicker
    In order to set your own custom predefined time to be set automatically when a date is selected, you can use this approach.

    RadDropDownTree for ASP.NET AJAX
    Configure RadDropDownTree to open its dropdown upwards
    Configure DropDownTree to open in an upward direction, to "Drop up".

    RadEditor for ASP.NET AJAX
    Empty Link error for Editor tools when validated with Wave
    This article gives two possible solutions to the "Empty Link" errors for the tools in the Editor's toolbar when validated with WAVE.

    RadGrid for ASP.NET AJAX
    Column Resizing
    Improved information on setting initial column size and how column size is determined.

    Persist current PageIndex or stay with the first item after PageSize changed in RadGrid
    By default RadGrid will jump to the first page when the PageSize is changing. Sometimes, you might want to persist the current PageIndex or stay on the same page with the first item of the current page after the PageSize is changed in RadGrid. This article will show you the way you can achieve that.

    Set Focus to a Control in PopUp Edit Form of RadGrid
    The PopUp is loaded after the grid and the focus should be set in a later stage.

    Export grouped grid to CSV
    CSV does not support grouping, so you can replace grouping with sorting or use the XLSX format.

    Change the skin of built-in filter controls of RadGrid
    Change the skin of built-in filter controls of RadGrid, so that they will look different from the grid.

    Filter separate columns with OR logic; create custom filtering logic
    This article shows how you can modify the built-in grid filtering logic to use your own through modyfing filter expressions or filtering the underlying data source.
  11. Rumen
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    Rumen avatar
    14220 posts

    Posted 06 Nov 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    How to Load Skins from External Assemblies
    General Improvements on the documentation as well as added support for Lightweight RenderMode.

    How to load skins from external assemblies
    Custom Skins Assembly Solution including the Class Library and a Web Site used for the "How to Load Skins from External Assemblies" documentation article.

    RadGrid for ASP.NET AJAX
    Column Resizing
    Improved information on setting initial column size and how column size is determined.

    RadHtmlChart for ASP.NET AJAX
    Gap and Spacing
    Series can be overlapped as of R1 2019 by setting negative values to the Gap and/or Spacing properties.
  12. Marin Bratanov
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    5128 posts

    Posted 20 Nov 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Configuration Error related to MachineKey
    If you get a strange error without much details that points to the machine key, it may be due to old encryption methods.

    RadButton for ASP.NET AJAX
    Animate hiding and showing of RadButton to fade out and fade in
    If you want to add some animated effect to hiding the button to make it more pleasant to the eye, look no further than the approach below.

    RadGrid for ASP.NET AJAX
    Get SQL compliant FilterExpressions from RadGrid
    Workaround to Get SQL compliant FilterExpressions from RadGrid

    RadGrid Lazy Loading and Infinite Scroll
    Code Library sample demonstrating Lazy Loading and Infinite Scroll for RadGrid

    Use a ToolTip as a Feedback for Input Controls as a Validation Message
    An example of using RadToolTipManager for creating a Tooltip that gives feedback about the input error.

    Update all, individual or selected rows using RadGrid with InPlace edit mode
    Sample project that uses InPlace EditMode (server-side data editing) to do bulk updates on grid items.

    Implement the Built-in Command Item of Grid Batch Editing in a Template and Add Delete Button
    This sample demonstrates how to you can simulate the built-in CommandItem of RadGrid when using Batch editing.

    RadSpreadsheet for ASP.NET AJAX
    Broken scroll and overflow appearance in Spreadsheet
    When you load a file in the Spreadsheet, sometimes it has a broken appearance, it overflows and the scroll is not working.
  13. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5128 posts

    Posted 27 Nov 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Installing the Telerik Controls from a NuGet Package
    New section: Available Telerik Nuget packages and the ddls in them

    How to Use JavaScript Intellisense for the Telerik Controls
    Added information how to use JavaScript intellisense in VS 2017

    jQuery Intellisense
    Added information how to use jQuery intellisense with VS 2017

    RadDiagram for ASP.NET AJAX
    Create Connection Points Programatically
    Explains how to add intermediate connection points between the shapes in order to achieve specific layout.

    RadDropDownTree for ASP.NET AJAX
    Keyboard Support
    Updated the information to explain the control behavior correctly.

    RadGrid for ASP.NET AJAX
    JavaScript error in IE when hovering header row with svg in it
    A peculiar scenario where a HeaderTemplate in a grid that contains SVG can cause errors under IE.

    RadMenu for ASP.NET AJAX
    Apply ClickToOpen functionality for sub-items of RadMenu
    Apply ClickToOpen functionality for child items.

    RadPageLayout for ASP.NET AJAX
    Overview
    Added information about the required viewport meta tag without which browsers will ignore some CSS @media queries.

    RadScheduler for ASP.NET AJAX
    Apply custom HTML attributes to the Scheduler appointment
    Apply custom HTML attributes to the HTML element generated by the appointment.

    RadSpreadsheet for ASP.NET AJAX
    Server-side export to Excel from RadSpreadsheet
    Server-side export Spreadsheet to Excel using Document Processing.
  14. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5128 posts

    Posted 05 Dec 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Apply Client-side Logic to Initially Hidden Controls
    Learn how to apply client-side logic (or a funtion override) to a control that is initially hidden.

    RadAutoCompleteBox for ASP.NET AJAX
    Show all records when focusing the input element of AutoCompleteBox
    Show all records in AutoCompleteBox when the input is focused.

    RadDiagram for ASP.NET AJAX
    Change Connectors Collection Dynamically
    Update the connectors collection when the Visual template of a shape is changed.

    RadGantt for ASP.NET AJAX
    Use CustomFields in Gantt with a simple CustomProvider
    This article shows a simplified version of the Custom Tasks Field with a simple CustomProvider using Session instead of EntityFramework.

    RadGantt with Simple CustomProvider using collections in Session
    Create a Simple Custom Provider for RadGantt that uses a list of appointments saved in the Session.

    RadGrid for ASP.NET AJAX
    Stack responsive RadGrid columns on small screens
    Make the Grid more responsive by stacking the columns on small screens.

    Extend DateTimeColumn Filter Range
    What to do when the date time column appears to not honor the min and max dates and only allows you to filter between the years 1900 and 2100
  15. Marin Bratanov
    Admin
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    5128 posts

    Posted 11 Dec 2018 Link to this post

    RadAsyncUpload for ASP.NET AJAX
    Resize images client-side with HTML5 before uploading with RadAsyncUpload
    Resize images on client-side before uploading them with the RadAsyncUpload control.

    RadGrid for ASP.NET AJAX
    Setting Pager Template
    Added example of handling page size change with a custom pager template.
  16. Marin Bratanov
    Admin
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    5128 posts

    Posted 18 Dec 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    CSS Validation issues in Telerik UI for ASP.NET AJAX stylesheets
    If CSS validation tools flag the Telerik stylesheets, the cause is necessary hacks or vendor prefixes and you can ignore that.

    RadSpreadsheet for ASP.NET AJAX
    Understanding Telerik AJAX and Document Processing Library Spreadsheet Workbook and Worksheets
    The assemblies from the Telerik UI for ASP.NET AJAX(later referred as AJAX) suite and Document Processing Library(later referred as DPL) both have Workbook and Worksheet classes which are different and with different capabilities.
  17. Marin Bratanov
    Admin
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    5128 posts

    Posted 08 Jan 2019 Link to this post

    RadAsyncUpload for ASP.NET AJAX
    File Filtering
    Updated article about filtering the Choose File dialog with the current state of affairs - most notably that the FileFilters property will not work in modern browsers.

    RadDropDownList for ASP.NET AJAX
    Change DropDownList Item Color and Background
    How to Change DropDownList Item Color and Background since BackColor and ForeColor properties do not work. Answer - use CSS rules.

    RadHtmlChart for ASP.NET AJAX
    Server-side Programming
    Added example of programmatic chart creation

    RadInput for ASP.NET AJAX
    Client-side Programming
    Added examples of using the client API of RadTextBox.

    RadProgressArea for ASP.NET AJAX
    Progress Template
    Added example for a custom template and the built-in Lightweight RenderMode template so you can use them as base.

    RadRating for ASP.NET AJAX
    Microdata and Structured Data
    RadRating and microdata/structured data - RadRating does not generate it and it is out of its scope.
  18. Marin Bratanov
    Admin
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    5128 posts

    Posted 16 Jan 2019 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    RadMultiColumnComboBox Documentation
    Documentation for the new RadMultiColumnComboBox control

    RadMultiColumnComboBox Demos
    Demos for the new RadMultiColumnComboBox control.

    Chat Toolbar Documentation
    Documentation about the new Chat Toolbar feature

    Chat Toolbar Demo
    Demo for the new Chat Toolbar feature

    RadCloudUpload for ASP.NET AJAX
    Changes and Backward Compatibility
    Added information on base64 encoding that is now used for non-ASCII characters in metadata as of R1 2019.

    RadFilter for ASP.NET AJAX
    Customizing the Menu
    Updated the article to explain how to have only one item that acts as a default filter.

    RadHtmlChart for ASP.NET AJAX
    Gap and Spacing
    Series can be overlapped as of R1 2019 by setting negative values to the Gap and/or Spacing properties.

    Line Chart
    Add information on the ability to remove the empty space around the chart (i.e., to have the chart start from the y-axis), by setting the new Justified property of the x-axis to true.

    RadInput for ASP.NET AJAX
    Value hidden behind spin buttons with right align
    How to avoid having the value in a numeric textbox cut off by right-align or RTL.
  19. Marin Bratanov
    Admin
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    5128 posts

    Posted 22 Jan 2019 Link to this post

    RadMultiColumnComboBox for ASP.NET AJAX
    Bind MultiColumnComboBox to EntityDataSource
    This project shows how to easily bind the RadMultiColumnComboBox to an EntityDataSource.

    Known Issues in RadMultiColumnComboBox
    This article lists the known issues in the RadMultiColumnComboBox control

    RadDropDownList for ASP.NET AJAX
    Grouping DropDownList items
    Grouping of DropDownList similar to RadComboBox - https://docs.telerik.com/devtools/aspnet-ajax/controls/combobox/how-to/grouping-items

    RadSpreadsheet for ASP.NET AJAX
    How to iterate all cells and rows in Spreadsheet properly
    This article explains how to use the Index property of Cells and Rows so that you know their correct location in a sheet
  20. Marin Bratanov
    Admin
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    5128 posts

    Posted 12 Feb 2019 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Integration with Kendo UI Widgets
    Updated list of the controls that are wrappers over Kendo UI for jQuery widgets.

    Disable Auto Complete in Chrome for Input elements, RadTextBox and RadComboBox
    Updated the article to reflect the new support of autocomplete attribute of Chrome v71 update

    RadButton for ASP.NET AJAX
    Fix Missaligned RadioButtonList icons when item is too long
    When the RadioButtonListItem's text is longer than the listbox' width, the radio button icon is on a separate row.

    RadComboBox for ASP.NET AJAX
    ComboBox Filtering with Diacritic Accents
    You can choose to enable accent-insensitive filtering for the RadComboBox component.

    Add example for client-side disable/enable of RadComboBox
    Add example for client-side disable/enable of RadComboBox

    RadInput for ASP.NET AJAX
    ShowPassword button for RadTextBox with TextMode Password
    Implement the ShowPassword button for a RadTextBox with TextMode="Password".

    RadListBox for ASP.NET AJAX
    Minimize the SelectedIndexChanged server events fired when SelectionMode is Multiple for RadListBox
    The SelectedIndexChanged server-side event is fired for each item when dragging to select multiple items in RadListBox

    RadMediaPlayer for ASP.NET AJAX
    Automatically play next video and have a PlayNext button
    This example shows how to implement the logic for playing the next video and how to add and style the play next button.

    RadMultiColumnComboBox for ASP.NET AJAX
    Known Issues
    This article lists the known issues in the RadMultiColumnComboBox control

    Add custom data to dataitem similar to adding attributes in ItemDataBound event
    This project shows how to modify the data items from SqlDataSource to add or hide any information to an item. This is similar to using and ItemDataBound server-side event and add some attributes to the item. 

    Achieve SelectedIndexChanged server-side event behavior with RadMultiColumnComboBox
    Achieve SelectedIndexChanged server-side event behavior with RadMultiColumnComboBox
  21. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5128 posts

    Posted 20 Feb 2019 Link to this post

    RadScheduler for ASP.NET AJAX
    Customizing Timeslot based on start date hour when Scheduler has Timezone set
    An example is added to demonstrate how to handle a scenario where the start hour of a timeslot is needed when the Scheduler has the Timezone set

    RadWindow for ASP.NET AJAX
    Restrict/Constrain window drag to left and top (real-time)
    An example that shows how you can have custom constraints for a draggable RadWindow.
  22. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5128 posts

    Posted 06 Mar 2019 Link to this post

    RadAjax for ASP.NET AJAX
    Redirecting to Another Page
    Added information on how to redirect through the global RadAjaxManager instance.

    RadAjaxManager Server Methods
    Added information about getting the singleton RadAjaxManager reference through a static method.

    RadGrid for ASP.NET AJAX
    Improve RadGrid performance by reducing the number of slow queries to the database
    Unnecessary queries to the database could be avoided by saving the data into a Session/Cookie variable and reuse the Session/Cookie data instead of sending queries to database as shown in the demo below.
  23. Rumen
    Admin
    Rumen avatar
    14220 posts

    Posted 12 Apr 2019 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Latest Internal Builds
    What is LIB, its purpose and how to obtain it?

    Clone or create Telerik controls on the client with JavaScript
    An article describing why Telerik controls cannot be created on the client-side and suggesting possible approaches to overcome this.

    Export large amount of data to PDF, XLSX and CSV using the Telerik Document Processing libraries
    It is a resource dependent and sensitive topic to export large amount of data, even decent computers with enough resource would struggle or applications themselves are failing. Most common problem everyone is running into, is the Out of Memory Exception. How to export that amount of data then? The answer is, by using the Telerik Document Processing libraries.

    RadGantt for ASP.NET AJAX
    Configure the YearView of the Gantt so that looks like a Quarters view
    Configure the YearView of the Gantt so that it shows Quarters.

    RadHtmlChart for ASP.NET AJAX
    Hide PieChart Labels for Specific Values
    Explains how to hide some labels in RadHtmlChart (e.g., when the data value is zero).

    RadMediaPlayer for ASP.NET AJAX
    Remove buttons and title bar to create a minimalistic RadMediaPlayer for audio
    Remove buttons and title bar to create a minimalistic RadMediaPlayer for audio

    RadScheduler for ASP.NET AJAX
    Multiple Selection for Timeline View of Scheduler
    This sample demonstrates how you can achieve selection and multiple time slot selection for Timeline View of RadScheduler.
  24. Rumen
    Admin
    Rumen avatar
    14220 posts

    Posted 17 Jul 2019 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Determine the render mode of all Telerik controls and catch mixed render mode issues
    Inspect the page for "mixed render mode" issue. This would improve your debugging experience and let you easily identify the controls with the unexpected RenderMode.

    Set Common Properties or Behavior for a Type of Control
    In some scenarios you may want to define a specific standard configuration/properties and behavior for some of these control types.

    Commenting HTML in Web Forms
    Details about comments in Web Forms

    RadGrid for ASP.NET AJAX
    Set Default Insert Value When Adding New Records in Grid
    Pre-set default values to make it more convenient to fill up the form.

    Virtualization
    Add new section - Internal Logic and Use Cases

    RadListBox for ASP.NET AJAX
    Check/uncheck items on select in ListBox
    Check/uncheck items on select in ListBox

    RadMaskedTextBox for ASP.NET AJAX
    Allow Only Upper and Lower Letters in the Mask
    If you want to allow both upper and lower letters for the mask part, you can use the implementation demonstrated in the attached web site sample.

    RadNumericTextBox for ASP.NET AJAX
    Attach onkeydown or onkeyup to RadNumericTextBox Programmatically
    The solution demonstrates how you can achieve this by subscribing to the client-side event from the code-behind programmatically.

    RadPivotGrid for ASP.NET AJAX
    Access and determine applied filters
    RadPivotGrid provides built-in Includes/Excludes filtering. After the user filters the pivotgrid content, you may want to be able to get this information for indication or other reasons.

    RadScheduler for ASP.NET AJAX
    Override default Show More button behavior in Scheduler MonthView
    Override default Show More button behavior in Scheduler MonthView.

    Specified argument was out of the range of valid values. Parameter name: value error in Scheduler Timeline view
    The following error is encountered when the RadScheduler1.TimelineView.NumberOfSlots property is set to a big number and the column width is set in pixels so that Horizontal scroll appears. The issue is reproduced by having an appointment staring in one of the last slots in the view.

    RadSpreadsheet for ASP.NET AJAX
    Load Excel file with SpreadsheetDocumentProvider when using Custom Provider
    Use SpreadsheetDocumentProvider inside custom provider to Save/Load Excel files and have control over the data.
  25. Rumen
    Admin
    Rumen avatar
    14220 posts

    Posted 23 Oct 2019 Link to this post

    Installer and VS Extensions for ASP.NET AJAX
    Telerik AJAX components appear multiple times in Visual Studio 2010 toolbox
    If you use VS2010 and get multiple instances of the same controls in the Toolbox, check this article to fix the issue.

    NuGet feed for ASP.NET AJAX
    Improve article Installing the Telerik controls from nuget package
    The nuget package names for Document Processing Library assemblies are corrected.

    Progress® Telerik® UI for ASP.NET AJAX
    Improve Installing Telerik controls from a zip archive article
    Added explanation of hotfix version of archives and when they are useful.

    Executing JavaScript Code from Server-side in Web Forms and ASP.NET AJAX
    Different ways to execute JavaScript from the server side in Web Form and AJAX frameworks.

    Force JAWS to pronounce artbitrary text with JavaScript
    Sometimes we need to force JAWS to read more text, either for further instructions or workaround a bug in a complex scenario. This article shows you how to do that.

    RadAjax for ASP.NET AJAX
    Improve RadAjaxManager Overview Article
    Improve RadAjaxManager Overview Article

    RadAsyncUpload for ASP.NET AJAX
    AsyncUpload Security
    Article updated with more information on encryption keys and info about new Custom Metadata type Whitelisting feature.

    Unrestricted File Upload
    Setting encryption keys is now mandatory. Information on avoiding the issue through general web.config networking settings was removed because it is not sufficiently safe. General readability and information structure improvements were made as well.

    Insecure Direct Object Reference
    Information on avoiding the issue through general web.config networking settings was removed because it is not sufficiently safe. Setting encryption keys is now mandatory.

    Access temporary file name and manually delete tempfile from RadAsyncUpload
    Accessing temporary files from UploadFile in RadAsyncUpload to get the name and remove the file manually

    RadComboBox for ASP.NET AJAX
    Combobox - Binding to DataTable, DataSet, or DataView
    Combobox - Binding to DataTable, DataSet, or DataView

    Improve "Filter ComboBox with CheckBox support enabled" Article
    Improve "Filter ComboBox with CheckBox support enabled" Article

    RadDropDownTree for ASP.NET AJAX
    Navigate to selected node in RadDropDownTree
    Navigate to selected node in RadDropDownTree

    RadEditor for ASP.NET AJAX
    Disable browser spellcheck and curly red underlines in RadEditor content area
    See how to disable the browser spellchecker within the content area of RadEditor

    Style inserted in text when deleting paragraph tag in Chrome
    The KB shows how to fix a Chrome related issue which appears when deleting a paragraph and the browser adds a span with inline style.

    RadGrid for ASP.NET AJAX
    Save and Restore RadGrid filters in the code behind
    Saving and Restoring filters can be as simple as saving the Grid's FilterExpression (Apply Default Filter on Initial Load). This, however, does not restore the filter functions and values for the Filter Controls automatically, it needs to be done manually. Parsing the FilterExpressions to get the information required to restore the filter values/functions can eventually be time consuming.

    Improve Telerik RadGrid Data Binding Basics
    Improve Telerik RadGrid Data Binding Basics

    Enable GridDateTimeColumn calendar keyboard navigation
    Added a code snippet showing how to access the Time picker and enabling the keyboard navigation inside GridDateTimeColumn

    Edit and insert with autocomplete
    Editing in RadGrid using RadAutoCompleteBox in GridTemplateColumn and built-in GridAutoCompleteColumn

    Page for client-side export
    Added a sample solution that calculates the height dynamically.

    Same Properties in RadGrid, MasterTableView and GridTableView Tags
    The principle is this – the RadGrid tag is the common place to set properties which inner levels inherit by default.

    Using Templates in RadGrid with Client-Side Binding
    The RadGrid dev team introduced a new option to define a template when the grid is bound on client-side - the ClientItemTemplate.

    RadGrid Custom Paging and Aggregates
    Since Aggregates calculation needs info from the entire database in order to display correctly the sum, count, etc. of the whole dataset, I am afraid this won’t be possible with Custom Paging.

    RadGrid Batch Editing Templates and Specifics
    RadGrid provides built-in Batch editing and it is one of the top and most popular editing modes

    Persist Scroll Position of Grid with 100% Height After AJAX Request
    Added a link with samples

    RadHtmlChart for ASP.NET AJAX
    Highlight series labels depending on the items' values
    Learn how to style the SeriesItems labels depending on the item's value

    Change shared tooltip client-side template of RadHtmlChart
    Learn how to control the Tooltip appearance by defining a custom shared tooltip ClientTemplate

    RadLightBox for ASP.NET AJAX
    How to Access Controls in RadLightBox Template?
    How to Access Controls in RadLightBox Template?

    RadListBox for ASP.NET AJAX
    Wrap RadListBoxItem text on a new line
    Learn how to wrap a long text RadListBoxItem item on a new line.

    RadListView for ASP.NET AJAX
    Accessing Controls in ListView
    There are various scenarios where it is required to access the Template controls of RadListView.

    RadMenu for ASP.NET AJAX
    Prevent highlight and color change in menu
    Prevent highlight and color change in menu

    RadNumericTextBox for ASP.NET AJAX
    Separate spinner buttons of NumericTextBox
    This article shows how with JavaScript and CSS the button for decreasing the value can be placed on the left side

    RadTreeView for ASP.NET AJAX
    TreeView Client Templates
    An example is added how to use Attributes inside client-side templates.

    RadWizard for ASP.NET AJAX
    Prevent double clicking the Next or Finish Wizard buttons
    Clicking the Finish button twice, will make two requests to the server, which would lead to executing the server-side logic twice. This can be a problem, for example, if a billing process takes place in the Finish button click handler.
  26. Rumen
    Admin
    Rumen avatar
    14220 posts

    Posted 05 Nov 2019 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Introduction
    Added links for feedback channels and note about Telerik points winning opportunity.

    Deploying a Telerik-enabled Web Application
    Added more information and links for the different deploy procedures


    RadAsyncUpload for ASP.NET AJAX
    Add Wizard Finish button to PostbackTriggers collection of AsyncUpload
    Persist RadAsyncUpload files in RadWizard until Finish button is clicked

    Preview PDF files before uploading with RadAsyncUpload
    Use PDF.js library to preview PDF files before uploading with RadAsyncUpload

    RadGantt for ASP.NET AJAX
    Create Hyperlink column in RadGantt
    Create a hyperlink column in RadGantt.

    Customize style and content of treelist column in RadGantt
    Get a row in treelist view of RadGantt corresponding to a given task.

    RadInput for ASP.NET AJAX
    Change Input type of RadNumericTextBox from Client
    See how to change the numeric type from number to currency and percent on the client

    Set RadTextbox width by CSS, JavaScript or Server side
    The article shows a couple of ways to change the RadTextbox's width by CSS, via JavaScript or Server side.

    RadSpreadsheet for ASP.NET AJAX
    Load and Save Spreadsheet via JSON
    Save and Load RadSpreadsheet provider with JSON string, improve loading performance and access changes on postback

    RadWindow for ASP.NET AJAX
    RadWindow resize does not stop when releasing the mouse
    When resizing a window by pressing and holding the left mouse button it happens that, when the mouse button is released, the resizing is not stopped. The article explains how to prevent this problem. tr

    The iframe content gets invisible when dragging the window
    RadWindow hides the iframes when resized or moved to prevent problems with the built-in events capturing of the iframes.

  27. Rumen
    Admin
    Rumen avatar
    14220 posts
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