Our organization has an app that we're porting from .NET/WPF to React. We have several grids, that utilize this:

```

using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using Telerik.WinControls;
using System.Configuration;
using System.Data.SqlClient;
using Telerik.WinControls.UI;
using Telerik.WinControls.Data;
using System.Data.OleDb;
using System.Linq;
using System.Threading.Tasks;
using System.Web.UI.WebControls;

using System.ComponentModel;

```

Instead, I'd like to use KendoReact.

Before I rewrite the entire thing in NextJS/KendoReact, are there some tools and techniques that I could use to save time?

Hi Telerik support,

I have two questions about the gridview checkbox column for WPF, see the sample application.

Just like in WinForms Telerik gridview with .EndEdit,  I want to end the edit and push the value to the viewmodel and have no more edit mode or editor active in the UI. Is there a way to achieve this behaviour?

The other question, when trying to set the EditTriggers in a style (with the intent to implicitly target every GridViewCheckBoxColumn) it straight up ignores it but it works when setting the EditTriggers in the column (see sample). Is this intended?

Kind regards,

Querijn

I have downloaded the Telerik provided example Telerik xaml-sdk\DataServiceDataSource to investigate using the Telerik RadGridView and its pagination behaviors against an OData webservice. For the most part this is working as I expected however I have one other requirement.

I have provided a screenshot of some functionality that allows a user to build their own custom subset of the information displayed by moving rows from the original source to another separate list however when a record is removed from the DataServiceSource the pagination is disabled as it detects that a change is present.

I need the DataServiceSource to be bound to the grid so that the filtering and paging works against the OData API as intended but this precludes me from getting the list building to work.

Is there a way we can disable this internal change tracking or is there some other components we could use?

Hello. 

I am using custom field extends on CodeBasedField. This field fetch some data form database or prompt window on request. Sometimes its simple string, some time its rft string. I face with problem on handling rft strings. Here is how its looks like in "Code" mode:

Here is how I handle result value of field:

protected override DocumentFragment GetResultFragment()
    {
        var text = "";
        /* 
        text = fetch string handle here
        */
        if (!text.StartsWith(@"{\rtf"))
        {
            var document = new RtfFormatProvider().Import(text);
            return new DocumentFragment(document);
        }
        return CreateFragmentFromText(text);
    }

And if 'text' is rtf the "Result" mode is this:

You can see that extra line breaking there.

I am sure that my rtf have no extra line breaking or paragraphs. As well as "SpacingAfter" parameter for paragraph is 0.

The reason of it is how code handle Paragraphs.

Here is some code from Telerik lib:

How fragment created from document:

How Fragment inserted in RadDocument:

The code inserts "line break" after Paragraph if its single in fragment and if "IsLastParagraphClosed" is true. I cant change value of "IsLastParagraphClosed" because its setter is internal. 

Same problem if my rtf has more then one Paragraph. In that case it use another flow in InsertFragmentInternal method but the result is same - extra line breaking after Field.

I found workaround to skip this line breaking, create fragment not from RadDocument but from Selection:

protected override DocumentFragment GetResultFragment()
    {
        var text = "";
        /* 
        text = fetch string handle here
        */
        if (!text.StartsWith(@"{\rtf"))
        {
            var document = new RtfFormatProvider().Import(text);
            document.Selection.SelectAll();
            return new DocumentFragment(document.Selection);
        }
        return CreateFragmentFromText(text);
    }

But in this case its not reproduce full text formatting (e.g. TextAlingment) for my rtf.

Please help me to find proper workaround or fix this issue.

 radTabControl.SelectedItem = radTabItem;     // set tab as the active one
 radTabItem.Content = userControl;  

The code above runs but the contents of the previous RadTabItem remain on srceen.

The tab and visual indicator showing what tab the user is on show but all the contents are those that belong to the previous tab.
Is there a refresh command that I'm missing?

Sometimes when I paste a test intro en empty RadMaskedTextInput, the application crushes and the following error occurs:

FATAL Index was out of range. Must be non-negative and less than the size of the collection.

Parameter name: index

                at System.Text.StringBuilder.Remove(Int32 startIndex, Int32 length)

   at Telerik.Windows.Controls.RadMaskedTextInput.HandlePasteNoMask(Object value, Object& returnString)

   at Telerik.Windows.Controls.RadMaskedTextInput.HandlePasteOverride(Object value, Object& returnString)

   at Telerik.Windows.Controls.RadMaskedInputBase.HandlePaste()

   at Telerik.Windows.Controls.RadMaskedInputBase.OnApplicationPaste(Object sender, ExecutedRoutedEventArgs e)

   at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)

   at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)

   at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)

   at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)

   at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)

   at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)

   at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)

   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

   at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)

   at System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)

   at System.Windows.Input.CommandManager.TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)

   at System.Windows.UIElement.OnKeyDownThunk(Object sender, KeyEventArgs e)

   at System.Windows.Input.KeyEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)

   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

   at System.Windows.Input.InputManager.ProcessStagingArea()

   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)

   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)

   at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)

   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)

   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)

   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)

   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Hi, 

I am using the RadSpreadsheet user control in WPF.

I am using 2 instances of this control in 2 different windows, with the same underlying Workbook such that modifications to the workbook in one control should be propagated to the other one. The idea is that one control offers a small preview of the workbook, while the second one is used in a separate window with extra-ribbon, formula bar... for more confortable editing (i.e enlarged view).

The problem is that changes from one spreadsheet control are not automatically reflected in the other "untouched" spreadsheet control. Changes are only reflected once I play with the display of the "untouched" spreadsheet control, such as changing the zoom level (via the status bar control) or clicking to change the current active sheet back and forth.

I was wondering if there is a function to force refreshing the radspreadsheet control so the display matches the underlying workbook.

I dont need to have the changes being reflected in real time, it would be enough to use such function to refresh the control used for preview once the larger window with the second control is closing.

Thanks

I am trying to apply the same `Margin` style to a lot of `RadWatermarkTextBox` controls by defining the `Margin` as a Style resource:

<Window.Resources>
    <Style TargetType="{x:Type telerik:RadWatermarkTextBox}">
        <Setter Property="Margin">
            <Setter.Value>
                <Thickness Bottom="{x:Static controls:Measurements.UnrelatedDistance}" />
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

Using the Style above makes the control look different compared to explicitly setting the `Margin` property for each control like below:

<telerik:RadWatermarkTextBox Text="Hello world">
    <telerik:RadWatermarkTextBox.Margin>
        <Thickness Bottom="{x:Static controls:Measurements.UnrelatedDistance}" />
    </telerik:RadWatermarkTextBox.Margin>
</telerik:RadWatermarkTextBox>

I am wondering what's the reason for this difference and how to use a Style resource to the make the control look like the way it does when explicitly setting the `Margin` property within the control.

Thank you.

Hello, 

I'm searching how to prevent a RadTileViewItem to automatically resize when switching to a different RadTabItem.

In our WPF application, we use the RadTabControl. The RadTabItems are dinamically created from user input. In a particular RadTabItem, I've include a RadTileView that is populated dinamically from ItemsSource.

The ContentChangeMode is set to Manual and I have a method managing it. It works well.

My problem is that when I maximize one item, its content switch to an editable control. The RadTileView is in a TabItem, so the user could click on an other Tab. When this occurs, all RadTileViewItems are refresh and them states are set to Restored. The RadTileViewItem I previously set to maximized is now Restored but his content is always linke to the "editable control".

My wish is to prevent this. The first solution possible is to block the MaximizedItem to set Restore state. Or second, when switching to Restore, force to set his state to NormalContent. These 2 solutions are OK for me.

Could someone help me or has an example of this?

Sorry if the question had already been posted, I didn't found someting.

And sorry for my poor english ;-)

Best regards

Hello,

I am developing an app for a Windows 10 Tablet that requires a picture to be taken.

I have set up a RadWebCam control, but when I open the settings menu on the tablet it takes 2-3 minutes of "Not Responding" before it loads the settings menu. Additionally it is very slow when adjusting the settings. The only reason I need the settings is for the Zoom control. Is it possible for me to change the zoom programmatically? I would like to add a +/- zoom button, but I cannot find anything on how to do this.

My second issue is that the app needs to run in portrait mode, but the camera is in horizontal mode. Is there any way I can change the rotation of the web cam? If I rotate the control it will rotate the bottom panel as well.