Latest online resources for UI for ASP.NET AJAX

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  1. Marin Bratanov
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    Posted 06 Dec 2017 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Official support for .NET 4.7
    The pages https://www.telerik.com/aspnet-ajax/tech-sheets/net-support and https://www.telerik.com/aspnet-ajax/tech-sheets/system-requirements have been updated with information about the officially intoroduced support for .NET 4.7 since version R2 2017 SP2 (version 2017.2.503).

    RadAsyncUpload for ASP.NET AJAX
    Add an image to the AsyncUpload button
    The KB article demonstrates how to customize the Select button of RadAsyncUpload and add an image to it.

    RadGrid for ASP.NET AJAX
    Multi Selection with Three-state Checkbox in the Header
    This sample demonstrates how you can embed a tri-state checkbox inside the header cell of a GridClientSelectColumn.

    Show progress bar on Submit using AsyncUpload within RadGrid
    A sample project to demonstrate manual upload operation using RadAsyncUpload implemented in RadGrid. Select the desired files, and start the upload on button Click. There are two scenarios in this sample, those are uploading all asynchronously and uploading one after the other.

    RadHtmlChart for ASP.NET AJAX
    Truncate Labels (set Max Length)
    How to limit the length of various strings in the chart.

    Pie Chart Labels are Cut Off or Truncated
    What to do if the labels of the chart get truncated or cut off.

    RadNavigation for ASP.NET AJAX
    How to select node programmatically
    A recursive approach that shows how to select a node and expand to it.
  2.
  3. Marin Bratanov
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    Posted 21 Dec 2017 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Installing the Telerik Controls from a NuGet Package
    Information on a nuget.exe upgrade that may require you to upgrade your NuGet Package Manager if you get errors.

    Different appearance in Internet Explorer on local and production servers
    In Internet Explorer, Telerik ASP.NET AJAX controls may have different appearance in development (local) and production environments.

    Performance issues and high CPU utilization on the server caused by RadStyleSheetManager or RadScriptManager
    This article describes server performance issues and slowdown caused by RadScriptManager or RadStyleSheetManager, usually increasing CPU load that may even max it out.

    RadAsyncUpload for ASP.NET AJAX
    How to filter (limit) file selection in the upload dialog
    This article shows how to define what file types the end user can see when choosing a file for upload.

    RadAutoCompleteBox for ASP.NET AJAX
    Highlight matching text in filtered items of RadAutoCompleteBox
    This example demonstrates how the string in the item's text that matches the filter string can be highlighted. A similar functionality is observed in the RadComboBox.

    RadButton for ASP.NET AJAX
    Changing the background, text and border colors of RadButton
    How to change the background, text and border colors of RadButton on the client with JavaScript.

    Reset RadioButtonList state
    The article shows how to deselect RadRadioButtonList with server or client-side code.

    RadEditor for ASP.NET AJAX
    Inserting a Video Tag via the Media Manager instead of the default Object/Embed ones
    Solution which overrides the default way for embedding videos by using videos tags, thus avoiding browser related issues.

    RadGrid for ASP.NET AJAX
    Set full RadGrid height depending on row count
    The KB shows how to set full height to RadGrid

    Reduce cell width of RadGrid range filtering
    Reduce cell width of RadGrid range filtering

    Change keyboard navigation commands in RadGrid with Batch editing
    Change keyboard navigation commands in RadGrid with Batch editing

    How To add document Header and Footer to exported excel file (format Xlsx)
    This KB demonstrates How To add document header and/or footer to exported file when exporting RadGrid into excel format XLSX by using the telerik Document Processing Library, precisely RadSpreadProcessing.

    RadMenu for ASP.NET AJAX
    Select (highlight) the current page in the Menu
    When the client navigates to a page, if there is an item with NavigateUrl equal to the path in the address bar, it should be highlighted.
  5. Marin Bratanov
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    Posted 02 Jan 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Incorrect positioning of controls
    Added an example at the end that shows a generic solution that may save you positioning and scrolling issues, especially with Chrome 61+ that introduced a breaking change in scrolling calculations.

    Wrong placement of RadContextMenu and RadTooltip in Chrome 61
    Added an update on avoiding the problem altogether, as it may arise in many places and many controls (tooltip, window, loading panel, menu, context menu, dropdowns, etc.)

    Access Telerik Controls on Client-Side
    How to access Telerik controls in template or content page scenarios

    RadAjaxLoadingPanel for ASP.NET AJAX
    Modal
    RadAjaxLoadingPanel can be modal and cover the entire viewport.

    RadGrid for ASP.NET AJAX
    How to get UniqueName of RadGrid column from controls inside
    How to traverse the DOM and get information from the grid control. You can use that to perform instant inline editing.

    Add Shift+F10 Context Menu Navigation for RadGrid
    This sample demonstrates how you can override the default Shift+F10 keyboard shortcut combination of the browser and display the grid's own custom RadContextMenu instead.

    Export HTML content into Docx
    Code sample that demonstrates exporting RadGrid containing Html data into Word Format Docx by utilising the Telerik Document Processing Library.

    Make "Check All" to include only displayed list options in Excel-like filtering
    Clicking on "Check All" checkbox will check only displayed items when CheckList Filtering is enabled.

    Show one value but edit another
    How to show one value to the user but edit another in the Batch Edit mode.

    Changing RadGrid Column Header Text when Sorting is Enabled
    Change header text without breaking sorting

    Working With Templates in Batch Edit Mode
    Improved explanations on how to implement complex logic in template columns with batch editing.

    Batch Editing Server-side API
    Added information on the keys used to access changes

    RadListView for ASP.NET AJAX
    How to set height to RadListView and make it responsive
    How to define a layout in RadListView so you can set height, width, scrolling and other appearance settings for the listview.

    RadScheduler for ASP.NET AJAX
    Resizing Appointment Causes Height Increase
    Using custom border styles on an appointment may cause resizing issues with the UI.

    RadTreeList for ASP.NET AJAX
    Open RadTreeList Items in Edit Mode with Double Click
    Use double click action to open items in edit mode
  7. Marin Bratanov
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    Posted 09 Jan 2018 Link to this post

    RadComboBox for ASP.NET AJAX
    How to select first item on blur
    If you want to ensure there is input after the user filters or opens a combo box, you can use its API to select an item.

    RadEditor for ASP.NET AJAX
    How to keep focus on the activated tool in the toolbar
    When the user navigates the toolbar with the keyboard and activates a tool, focus moves to the content area. This article shows how you can keep the focus in the toolbar.

    RadGrid for ASP.NET AJAX
    Hide column data but keep aggregate data in the footer
    If you want to keep the footer aggregates but want to remove the item data from a certain column.

    Reordering Columns
    Added info on the expected order indexes and how to get the user action.

    How to set RadGrid Excel Like Filtering pop-up menu width
    The Excel-like filtering does not have a provision for resizing, but you can use a CSS hack to make it wider so you can see longer text messages in case the filtering option does not suffice.
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  9. Marin Bratanov
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    Posted 19 Jan 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Installing the Telerik Controls from a NuGet Package
    Information on a nuget.exe upgrade that may require you to upgrade your NuGet Package Manager if you get errors.

    Error Creating Control Failed To Create Designer after upgrade to R1 2018
    An error that may be caused by automated upgrades and its solution.

    RadCheckBox for ASP.NET AJAX
    Selected Item in RadCheckBoxList
    Added information and example on how to get or set selected items in RadCheckBoxList

    RadGrid for ASP.NET AJAX
    Access data from parent tables
    An example added that shows how to access data from parent tables in DetailTable scenario (see the green Tip section).

    Retrieve filtered data from RadClientDataSource using RadGrid's event
    This sample describes the way to access the filtered results instead of the entire data when RadGrid is bound to RadClientDataSource. It could also be a viable workaround for the issue reported as Grid with RadClientDataSource sends two requests when navigating with Grid pager.
  11. Marin Bratanov
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    Posted 30 Jan 2018 Link to this post

    RadEditor for ASP.NET AJAX
    Prevent Cross-site Scripting (XSS)
    Added information which built-in anti-XSS filters in RadEditor are enabled by default.

    Error: Web.config registration missing! The Telerik dialogs require a HttpHandler registration in the web.config file.
    The article has been updated with information about Friendly URLs and a "See Also" section.

    RadImageGallery for ASP.NET AJAX
    Specify order when loading images in RadImageGallery
    The article provides guidance of how to change the default order of images in RadImageGallery.

    RadMenu for ASP.NET AJAX
    How to hide menu items when the user does not have permissions to see them
    how to hide menu items when user has no permissions to see them.
  13. Marin Bratanov
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    Posted 06 Feb 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Errors when Page Async="true" for the async-await pattern
    The async-await pattern for WebForms can cause errors and is not supported.

    Disable Auto Complete in Chrome for Input elements, RadTextBox and RadComboBox
    Learn how to stop the autofill / autocomplete feature of Chrome

    RadAutoCompleteBox for ASP.NET AJAX
    DataSource not set error thrown when data source is provided in ItemDataBound
    How to resolve the DataSource not set error when the autocomplete is in a data bound control like a repeater or grid

    RadGrid for ASP.NET AJAX
    Horizontal scroll speed is slow with static headers
    Clicking the scrollbar may cause slow/unexpected scrolling behavior when static headers are enabled.

    Two tooltips for header cell when column resizing is enabled
    How to avoid the second browser tooltip that you may get when tooltipifying a grid header.

    RadListView for ASP.NET AJAX
    Item drag and drop with client data binding
    How you can use client binding with drag-and-drop

    Drag and Drop
    Added information that item drag and drop is supported only with server-side data binding.
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  15. Marin Bratanov
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    Posted 13 Feb 2018 Link to this post

    RadGrid for ASP.NET AJAX
    Place the RadGrid Excel-like filter inside a submenu
    Cample code that demonstrates how to place the Excel-like filter inside a submenu, thus will help reducing the size of the HeaderContextMenu.


    RadWizard for ASP.NET AJAX
    RadWizardStep client API
    Added list of the methods that the wizard step exposes.
  17. Marin Bratanov
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    Posted 06 Mar 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Fix incorrect appearance in Telerik controls when using Bootstrap library
    Telerik controls may have wrong appearance when the Bootstrap library is loaded on the page.

    RadCalendar for ASP.NET AJAX
    OnDateSelecting
    A new example that shows how you can use it to perform client-side validation of the selected date.

    RadGrid for ASP.NET AJAX
    Extracting values from grid items
    Added information for template columns

    Adding a delete confirmation
    Updated custom confirm example for Lightweight RenderMode

    Apply culture specific format to a Numeric Column
    Sample code demonstrating how to apply different culturual Numbering format to GridNumericColumn without changing the culture of RadGrid or the Page itself.

    Master/Detail RadGrids with Programmatic Binding
    This sample demonstrates how you can have related Master and Detail grids and update the detail grid based on the selection of the main grid.

    Different Controls in the Top and Bottom CommandItem of RadGrid
    This sample demonstrates how you can use the CommandItemTemplate to have two sets of different controls in the top and in the bottom command item.

    RadListView for ASP.NET AJAX
    Error with client side binding and AJAX postback
    An error you may get when disposing a listview bound on the client in a partial postback.
  19. Marin Bratanov
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    Posted 13 Mar 2018 Link to this post

    RadDropDownTree for ASP.NET AJAX
    Show children with different text than the filter
    How to filter nodes by text that is not present in their text field.

    RadEditor for ASP.NET AJAX
    Disable Grammarly in RadEditor
    Learn how to disable the popular browser plug-in to prevent side effects with the selection and generation of junk content in RadEditor.

    RadGrid for ASP.NET AJAX
    Misaligned Columns in RadGrid with Scrolling Enabled
    In some scrolling cases you can observe misaligned columns and headers, usually when using Internet Explorer.

    RadGrid Export to Pdf & Excel Image Header
    Code Library sample that demonstrates Exporting RadGrid with an Image as Header for both PDF and Excel.

    RadSpreadsheet for ASP.NET AJAX
    Spreadsheet client-side import file from server and save client-side exported file on server
    The following project shows how you can use the client-side import of the RadSpreadsheet to load a file from the server and how to save on the server the file created from the client-side export functionality. This approach can be used to overcome some issues or limitations of the Server-side import/export of the RadSpreadsheet which are not present in the client-side import/export.
  21. Marin Bratanov
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    Posted 27 Mar 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Browser Detection API
    A new article describing a new set of client-side flags that you can use for browser and feature detection.

    Telerik Static Client Library
    Added link to better browser detection API as the flags listed on this page are old.

    RadButton for ASP.NET AJAX
    Fix misalignment issue with RadRadioButtonList
    You may experience an issue with misaligned list elements. The article will show you how to deal with it.

    RadScheduler for ASP.NET AJAX
    Highlight all appointments with the same attributes as the hovered one
    This example demonstrates how to add a box-shadow of all appointments that have the same attribute as the currently hovered appointment.
  23. Marin Bratanov
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    Posted 03 Apr 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    How to fix License File related errors
    Learn how to identify the License File related errors and how to solve them.

    RadAsyncUpload for ASP.NET AJAX
    Access selected file in the arguments of OnClientFileSelected event of AsyncUpload
    Having the files available in the arguments of the event could be useful when the file is needed for some processing on the client before uploading.

    RadDropDownList for ASP.NET AJAX
    Add Accessing client changes at the server article
    An article explaining how to access the changes to the items made on the client-side.

    Update RadDropDownList client-side object API article
    Added some missing methods and examples.

    RadEditor for ASP.NET AJAX
    Cancel Enter key execution in the content area
    Learn how to cancel the Enter key execution in the content area of RadEditor

    RadGrid for ASP.NET AJAX
    How to get deletee notification in batch editing mode
    The user needs to see that they deleted a row and must press Save Changes first. By default the row disappears and this can be changed with a single property.

    Xlsx and Docx export limitation
    Added a limitation pertaining to a specific use case of custom skins.

    Biff export limitation
    Added a limitation pertaining to a specific use case of custom skins.

    RadScheduler for ASP.NET AJAX
    Highlight all appointments with the same attributes as the hovered one
    This example demonstrates how to add a box-shadow of all appointments that have the same attribute as the currently hovered appointment.

    Implementing a Custom Scheduler Provider That Supports Multi-Valued Resources
    Implementing a Custom Scheduler Provider That Supports Multi-Valued Resources following the steps from https://docs.telerik.com/devtools/aspnet-ajax/controls/scheduler/data-binding/providers/implementing-a-provider-that-supports-multi-valued-resources

    RadStyleSheetManager for ASP.NET AJAX
    Serving External Style Sheets
    Added example how to access the RadStyleSheetManager control from a content page or user control so you can dynamically add stylesheets
  25. Marin Bratanov
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    Posted 10 Apr 2018 Link to this post

    RadAsyncUpload for ASP.NET AJAX
    How to Manipulate the Uploaded Files
    Added information on troubleshooting issues related to TargetFolder usage

    RadDataForm for ASP.NET AJAX
    DataForm Object
    Added information on controlling the Insert Item Template rendering position.

    RadEditor for ASP.NET AJAX
    Disable Drag and Drop of internal and external elements and text in RadEditor
    Learn how to disable Drag and Drop of internal and external elements and text in RadEditor

    RadFileExplorer for ASP.NET AJAX
    Drag and Drop Files
    This article explains the drag-and-drop features in RadFileExplorer

    RadGrid for ASP.NET AJAX
    How to bind RadGrid properly on server-side
    Important tips for binding the grid properly

    RadHtmlChart for ASP.NET AJAX
    Displaying Grand Total In Stacked Series Labels And Pie Series Legend
    Shows how you can use the stackValue property in a label of a stackable series to do this.

    Shared Template for ToolTips
    Added example how to get a total in the tooltip.

    RadMap for ASP.NET AJAX
    Move or Create a Map marker at the clicked location
    This article shows how to move a marker or create a new one at the position on the map where you clicked.

    RadNavigation for ASP.NET AJAX
    Expand and collapse delay on hover in RadNavigation
    This project implements the ExpandDelay and CollapseDelay functionality based on the Navigation - Expand On Hover demo and behaves similarly to the RadMenu.

    RadOrgChart for ASP.NET AJAX
    OrgChart export to PDF connecting lines correctly with ClientExportManager
    The connecting lines of the Lightweight OrgChart are rendered as styled :before and :after pseudo-elements. Due to the different rendering of the pseudo-element in the various browsers, the connecting lines are not exported in the PDF file.

    RadScheduler for ASP.NET AJAX
    Custom date format in Scheduler with Agenda View
    The Agenda View does not support built-in removing of the end time of an appointment and using a custom format. Nevertheless, this project demonstrates how the HTML elements containing the dates can be modified as per the project requirements.

    Scheduler bound to a List using the DataSource property
    This project demonstrates how to bind a Scheduler and its Resources to a List by following the steps in Using the Data Source Property article.
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  27. Marin Bratanov
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    Posted 17 Apr 2018 Link to this post

    RadAsyncUpload for ASP.NET AJAX
    Non-negative number required. Parameter name: length from Telerik.Web.UI.Upload.RequestParser.GetFieldBytes()
    Sometimes a "Non-negative number required. Parameter name: length" error is thrown when the Obsolete RadUpload handlers are registered in the web.config file.

    RadFileExplorer for ASP.NET AJAX
    How to know, in ItemCommand, if the user checked the Overwrite if file exists? checkbox
    An article that shows how to get the user choice in ItemCommand before it reaches the provider.

    RadGrid for ASP.NET AJAX
    Header Context Menu
    Added examples how to set a custom CSS class on the header context menu.
  29. Marin Bratanov
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    Posted 24 Apr 2018 Link to this post

    RadEditor for ASP.NET AJAX
    Disable the Embedded jQuery in RadEditor dialogs
    The article shows how to disable the Embedded jQuery in RadEditor dialogs and guides you how to add your own version of the popular JavaScript library to them.

    RadGrid for ASP.NET AJAX
    How to set Excel export cell format
    Setting the Excel cell format can prevent formatting issues like long numbers or data that Excel refuses/wants to parse. This provides the developer with control over the presentation of the excel export.

    How to remove the filter row from Excel export
    This article shows how you can remove the blank filter row from the Excel export. It also lets you remove content form custom FilterTemplates as well.

    RadNotification for ASP.NET AJAX
    How to create UI for EU Cookie Consent
    This is an example that shows the base for implementing a popup for cookie consent.

    RadSpreadsheet for ASP.NET AJAX
    Expected op «,» but found punc «;» error when loading Excel file in Spreadsheet
    Expected op «,» but found punc «;» error is thrown in the console when loading an Excel file in Spreadsheet.
  31. Marin Bratanov
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    Posted 03 May 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Programmatic creation of RadScriptManager causes issues with RadAjaxManager
    Creating programmatically the script manager may cause the ajax manager settings to not work. Here is the solution.

    Automatic Custom Skin Registration
    This section was improved to list the full requirements, behavior and limitations of the automatic custom skin registration feature of RadSkinManager.

    RadGrid for ASP.NET AJAX
    Drag and Drop of Grid Items
    Added information on automatic scrolling

    How to create custom aggregate functions
    A new example showing the details and API you can use to create custom aggregate functions with RadGrid if the built-in ones that work with numbers do not suffice for your case.
  32.
  33. Marin Bratanov
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    Posted 17 May 2018 Link to this post

    RadChat for UI for ASP.NET AJAX
    Documentation
    The documentation for the new Chat control.
    Demos
    The demos for the new Chat control.

    Progress® Telerik® UI for ASP.NET AJAX
    How to encrypt the Telerik appSettings keys
    This KB article summarizes information scattered on the Internet that shows how you can encrypt portions of the web.config so sensitive data like keys and paths is more secure than when stored in plain text.

    RadClientExportManager for ASP.NET AJAX
    Known Limitations
    Updated the list with vertical text

    Exporting Special Characters
    Improved readability and added examples that can reduce the code you need to change

    RadGrid for ASP.NET AJAX
    Batch Editing Server-side API
    Improved examples of handling server-side events

    Print
    Added troubleshooting information for the built-in printing feature of the grid - link to a workaround for Chrome and information on exporting special characters

    RadHtmlChart for ASP.NET AJAX
    Common Issues
    A new section on how client events and tooltips can stop working if you move the chart in the DOM

    RadMap for ASP.NET AJAX
    How to show current location on map
    Updated the article the shows how to modify markers dynamically to explain the objects you need to use and added an example at the end that uses the current position for a marker.

    RadNotification for ASP.NET AJAX
    Embedded Icons
    Added information that the built-in icons are only available when the Text is used.

    Populate Static Content
    Add information how to create the control entirely in the code-behind and use rich content.

    RadNumericTextBox for ASP.NET AJAX
    Change NumericTextBox number format dynamically
    Update displayed text after changing some number format options.
  35. Marin Bratanov
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    Posted 22 May 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Unhandled exception in Telerik.Web.UI.WebResource
    How to deal with a JavaScript unhandled exception seemingly coming from the Telerik web resource handler.

    RadButton for ASP.NET AJAX
    A potentially dangerous Request.Form value was detected from the client in IE when RadButton is on the page
    An error thrown in IE and how to avoid it.

    RadHtmlChart for ASP.NET AJAX
    How to Show RadHtmlChart with Animation on a Click Event
    Showing a RadHtmlChart on a button click with animations.

    RadHtmlChart with DateTime Axis Loads Slowly
    RadHtmlChart with a DateTime Axis loads slowly or causes the borwser to hang
  37. Marin Bratanov
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    Posted 29 May 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Cannot scroll Telerik control in iOS 11.3 - the page scrolls instead
    In a long page when you scroll a Telerik control which has a scrolling container (for example ComboBox, DropDownList or Grid with enabled scrolling) the page itself is scrolled along the control's scrolling container.

    RadButton for ASP.NET AJAX
    Reset RadioButtonList state
    Updated client-side example to show how to carry over the information that no items are selected to the server.

    RadEditor for ASP.NET AJAX
    Paste at the Cursor Position
    Added info on how to handle additional events like keyup to provide smoother experience.

    RadGrid for ASP.NET AJAX
    How to localize filter menu options and change header context menu height
    Such features are not directly exposed and so you must access the controls whose texts you want to change. This example shows how you can get context menu items and even localize them on a per-column basis.

    ClientDataSource binding: after filtering so no records are present and removing the filter there is no pager
    The pager can go missing after removing filters in a client bound grid, and here's how to fix that.

    RadGrid for ASP.NET AJAX
    How to have different text in the GroupFooters and the GridFooter
    A KB on having different text for the GroupFooter vs GirdFooter

    RadListBox for ASP.NET AJAX
    Selection is made when dragging an item
    An item in the listbox will be selected when dragged and this may cause double AJAX postbacks.

    RadScheduler for ASP.NET AJAX
    Scheduler resources not working with some Resource names
    Scheduler Resources are not working when their name is a reserved field or property. For example, a resource with name "Reminder" will not work but "ReminderResource" will.

    RadSpell for ASP.NET AJAX
    How to combine save and spell check
    When the user clicks Save you can have them go though a spell check and then submit the form.

    RadToolTip for ASP.NET AJAX
    RadToolTip for RadComboBox
    Added explanations how to handle load-on-demand scenarios
  38.
  39. Marin Bratanov
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    Posted 05 Jun 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Reverse Proxy (ARR) and Script Resource Issues
    Some ideas on resolving a reverse proxy scenario that renders the Telerik controls broken.

    RadClientDataSource for ASP.NET AJAX
    Add authentication request headers with ClientDataSource
    This article shows how you can add custom headers to the requests made from the ClientDataSource, for example, Authentication header.

    RadEditor for ASP.NET AJAX
    How to sanitize Markdown content
    This article shows how to implement content sanitization before importing Markdown into RadEditor

    RadGrid for ASP.NET AJAX
    Grid bound to WCF web service via ClientDataSource
    This example is isolated from the Grid - Basic Filtering demo, the client-side filtering Grid which is bound to a WCF web service via the ClientDataSource.

    Visually indicate filtered columns in RadGrid with Excel-Like Filtering
    Code Library sample describing how to configure RadGrid with Excel-Like filtering to visually indicate columns that have filters applied.
  41. Marin Bratanov
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    Posted 12 Jun 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    RadChat real-time live cross-browser chat via SignalR
    This example demonstrates how to configure the RadChat component for a real-time chat by using the SignalR technology.

    Error: The type or namespace 'ScriptManager' does not exist in the namespace 'System.Web.UI'
    Learn how to resolve the generic error: The type or namespace 'ScriptManager' does not exist in the namespace 'System.Web.UI'

    RadGrid for ASP.NET AJAX
    Horizontal scroll speed is slow with static headers
    Added a JavaScript workaround provided by one of our customers.

    Expand one item at a time in RadGrid with HierarchyLoadMode set to Client
    Code Library sample describing how to expand one item at a time in RadGrid when the HierarchyLoadMode property is set to Client.

    How to show a loading sign for excel-like filtering in RadGrid
    How to put a spinner on the excel-like filter checklist instead of the blank space.

    RadHtmlChart for ASP.NET AJAX
    Cross disappears on hover
    The Cross marker type can become invisible when hovered due to the default white highlight on white background. This article explains how to solve this.

    RadRotator for ASP.NET AJAX
    Setting RadRotator's size in percent
    Added link to the article treating the built-in support for width in percentage.
  43. Marin Bratanov
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    Posted 19 Jun 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Highlight text inside HTML elements and templates with RegEx
    Highlight text inside HTML elements and templates using Regular Expressions. The example in the article shows how to highlight text in TreeView nodes with templates.

    RadGrid for ASP.NET AJAX
    How To prevent columns from being hidden via the HeaderContextMenu
    How do I prevent certain columns from appearing in the HeaderContextMenu? I don't want some columns to be able to be hidden.

    How to prevent UP/DOWN keys from changing values in a GridNumericColumn editor
    Using an External Column Editor, additional settings can be configured for the GridNumericColumn

    RadLightBox for ASP.NET AJAX
    Templates
    Added information on how templates work with postbacks and what behavior to expect.

    RadScheduler for ASP.NET AJAX
    Edit scheduler appointment with double tap
    How to Edit a scheduler appointment with double tap.

    RadWindow for ASP.NET AJAX
    How to Change the Dialog Templates
    It is important to note that you can only use plain HTML and no server controls in the predefined templates (RadAlert, RadConfirm, RadPrompt)
  44.
  45. Marin Bratanov
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    5140 posts

    Posted 26 Jun 2018 Link to this post

    RadEditor for ASP.NET AJAX
    AjaxSpellCheck Object
    Added example of how to reference the spell check object and how to invoke a spell check before saving the content.

    Shift focus from RadEditor content area to its parent on Escape key press
    The solution shows how to programmatically focus elements on the page by charing an useful tip of using the tabIndex attribute.

    RadGrid for ASP.NET AJAX
    We found a problem with this formula when exporting to Xlsx
    How to deal with the We found a problem with this formula error when exporting to Excel

    RadPageLayout for ASP.NET AJAX
    RadPageLayout throws IndexOutOfBounds exception when iterating over LayoutRowCollection
    Preventing an IndexOutOfBound exception when iterating over the Row/Column collection

    RadTreeList for ASP.NET AJAX
    How to export template columns
    This article explains how you can deal with complex content when exporting TreeList data to Excel so you can avoid errors and modify the output to match your needs.

    RadWindow for ASP.NET AJAX
    Fluid or Adaptive Design with RadWindow
    This article shows how to make a responsive (adaptive) RadWindow that reacts to the small size of a mobile device so it is more comfortable for the user to interact with.
  47. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 03 Jul 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    License Agreement
    Added local installation locations for EULA and BOM.

    RadDiagram for ASP.NET AJAX
    How to pan with the mouse only
    Show how to pan the Telerik diagram without pressing Ctrl from the keyboard, only by dragging with the mouse.

    RadToolTip for ASP.NET AJAX
    Export from Tooltip
    This article shows different approaches you can take when you need to send a file from a tooltip or export content from it.
  49. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 11 Jul 2018 Link to this post

    Getting Started with Progress® Telerik® UI for ASP.NET AJAX
    First Steps with UI for ASP.NET AJAX
    A Getting Started article to help you setup quickly.

    Explore Control Features
    An article that explains how you can take a look at the features a control offers so you can get familiar with it.

    Customize Control Behavior
    An overview of how to find resources in order to implement your business logic with our controls.

    Change Control Appearance
    The basics of modifying the way a control looks.

    Next Steps
    Learning resources and next steps after getting familiar with the basics.

    Progress® Telerik® UI for ASP.NET AJAX

    Import and Export SQL database to *.sql script via SQL Management Studio
    This article will show you how to export a Database to a *.sql script and the how to import it from such kind of scripts.

    RadFormDecorator for ASP.NET AJAX
    Integration With RadControls
    Added detailed information on how styling a RadInput control works.

    RadGrid for ASP.NET AJAX
    Creating a RadGrid Programmatically
    Added an example of attaching event handlers for the RadGrid that is created on Page_Load.

    RadSpreadsheet for ASP.NET AJAX
    Overview
    Updated the list of supported file types to include csv, txt, json

    Improve performance of slowly loading Spreadsheet
    Loading a large amount of data in the Spreadsheet might result in a slow page loading.


  50.
  51. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 17 Jul 2018 Link to this post

    RadAsyncUpload for ASP.NET AJAX
    WebSeal SSO breaks file uploads
    WebSeal SSO can prevent RadAsyncUpload from sending files to the server and this article explains what happens and how to avoid it.

    RadListView for ASP.NET AJAX
    Change DataGroups Dynamically
    This example shows how you can change the DataGroups collection dynamically on the server in response to user actions, much like you can do with the grid.

    RadNavigation for ASP.NET AJAX
    Server Templates
    Added information that templates invalidate the NavigateUrl.

    Templates Overview
    Added information that templates invalidate the NavigateUrl.

    RadScheduler for ASP.NET AJAX
    Colorize rows by resource in Agenda view
    How to colorize appointment rows in Agenda View
  53. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 24 Jul 2018 Link to this post

    RadComboBox for ASP.NET AJAX
    Chosen value changes after postback with Material skin
    Describes a peculiar issue where under Edge when the Material skin is used, the user selection in the combo box may be lost.

    RadGrid for ASP.NET AJAX
    Batch Editing Validation
    Added examples and explanations of how MaxLength/MaxValue validation works with batch editing.

    Pre-populate insert item with batch edit
    An example that shows how you can preset data in the inserted item of a batch editing grid
  55. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 08 Aug 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    jQuery Troubleshooting
    A single-line solution to avoid jQuery and validation issues was added - disable Unobtrusive Validation.

    RadAsyncUpload for ASP.NET AJAX
    Preview uploaded image with RadAsyncUpload
    Preview the image file selected for upload with RadAsyncUpload.

    RadCaptcha for ASP.NET AJAX
    High CPU Usage with RadCaptcha Audio Code
    Describes an environment where the captcha audio causes performance issues and shows how to alleviate them.

    RadGrid for ASP.NET AJAX
    Hierarchy load modes
    Updated the documentation, to include example code snippets and help avoid confusions.

    Add buttons to RadGrid CommandItem when using Mobile RenderMode
    When using RenderMode Mobile, RadGrid was designed to only render the following buttons in its CommandItem: Add New Records, Save/Cancel (when EditMode="Batch"), finally the buttons for for all export types. The aim is to reduce the number of controls for mobile devices. Nevertheless, it is possible to customize the CommandItem and add more buttons to it as needed.

    Remove Group Separator From GridNumericColumn Editor
    A example demonstrating how to remove group separators from the GridNumericColumn's editor.
  57. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 14 Aug 2018 Link to this post

    RadEditor for ASP.NET AJAX
    After hitting enter the first line moves down in Chrome
    The article shows how to solve a newly appeared problem in Chrome related to the Enter key behavior which applies margin to first paragraph in the content area of RadEditor.

    Insert images with a base64 string in the src via the Image Manager
    The article demonstrates how to insert images with a base64 string in the src instead of the traditional URL path via the Image Manager

    RadGantt for ASP.NET AJAX
    Custom Tasks Fields
    Added information on using the autogenerated property accessors for the custom fields.

    RadNumericTextBox for ASP.NET AJAX
    Value is null after changing number format
    Explains a server problem that can arise from tampering with client properties in the numeric text box and result in loss of the value

    RadTreeList for ASP.NET AJAX
    Client-side Object
    Added the client-side command name for invoking a rebind ("RebindTreeList"), as it is different than the usual "Rebind".
  59. Marin Bratanov
    Admin
    Marin Bratanov avatar
    5140 posts

    Posted 21 Aug 2018 Link to this post

    Progress® Telerik® UI for ASP.NET AJAX
    Problem in IE, works fine in other browsers
    What to do if an issue happens only under IE.

    RadComboBox for ASP.NET AJAX
    Cascading RadComboBoxes with Checkbox Selection
    An example showing how to implement cascading RadComboBoxes with checkbox selection.

    RadSpreadsheet for ASP.NET AJAX
    Show messages to user after response from saving the Spreadsheet
    Show messages to the user when the response from the Save operation is returned.
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