To reproduce RadGridView (or other RadControl) flooding WM_TIMER messages do the following

1. Create a simple WinForms project with a RadGridView in it.

2. Open spy++ tool (it comes with Visual Studio).

3. Attach the process that is running the WinForms and choose to display its messages.

4. You should now see a lot of WM_TIMER messages as shown in the gif file.

When using the RadChartView Proerty Builder, existing series formatting is lost upon clicking ok.

Steps to replicate.

• Setup a new radchartview.
• Add some line series any way you like.
• Define Series color/dashstyle etc either from chart dropdown or from properties list.
• Close and save series properties and you will see current correct formatting in your design view.
• Open RadCharView property Builder.  Click ok.
• Series formatting has been reset to default new series colors/styles.

I downloaded the ERP demo from here: https://www.telerik.com/support/code-library/erp-demo-application-for-winforms

After upgrading the projects to .NET 4.8 and running the application, the following exception is observed:

The full stack trace:

System.Data.Services.Client.DataServiceTransportException
  HResult=0x80131509
  Message=Unable to connect to the remote server
  Source=Microsoft.Data.Services.Client
  StackTrace:
   at System.Data.Services.Client.HttpWebRequestMessage.GetResponse()
   at System.Data.Services.Client.DataServiceContext.GetResponseHelper(ODataRequestMessageWrapper request, IAsyncResult asyncResult, Boolean handleWebException)
   at System.Data.Services.Client.QueryResult.ExecuteQuery()
   at System.Data.Services.Client.DataServiceRequest.GetQuerySetCount(DataServiceContext context)
   at System.Data.Services.Client.DataServiceQueryProvider.ReturnSingleton[TElement](Expression expression)
   at ERP.Client.PurchasesControl.Initialize() in C:\Users\dyordano\Downloads\009a20df-21b2-4e64-b129-eaf9e0a686f5_ERP-CS (1)\ERP.Client\CustomControls\Views\PurchasesControl.cs:line 48
   at ERP.Client.BaseGridControl..ctor() in C:\Users\dyordano\Downloads\009a20df-21b2-4e64-b129-eaf9e0a686f5_ERP-CS (1)\ERP.Client\CustomControls\BaseGridControl.cs:line 49
   at ERP.Client.PurchasesControl..ctor() in C:\Users\dyordano\Downloads\009a20df-21b2-4e64-b129-eaf9e0a686f5_ERP-CS (1)\ERP.Client\CustomControls\Views\PurchasesControl.cs:line 29

  This exception was originally thrown at this call stack:
    System.Net.Sockets.Socket.DoConnect(System.Net.EndPoint, System.Net.SocketAddress)
    System.Net.ServicePoint.ConnectSocketInternal(bool, System.Net.Sockets.Socket, System.Net.Sockets.Socket, ref System.Net.Sockets.Socket, ref System.Net.IPAddress, System.Net.ServicePoint.ConnectSocketState, System.IAsyncResult, out System.Exception)

Inner Exception 1:
WebException: Unable to connect to the remote server

Inner Exception 2:
SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 65.52.19.99:80

Hi Team,

The Travel Assistant demos are broken... it just hangs. This is also true for the Xamarin Demos, WPF demos and WinForms demos.

Here are some screenshots:

UI for Winforms demos

Telerik UI for Xamarin demos

The designer tries to load the assembly and throws the following error:

Just to report a minor typo:

FitlerViewTextCategoryItemCreatedEventArgs, in Telerik.WinControls.UI.FilterView

Add a RadTextBox on the form and open its smart tag:

Open the editor for the font and select the entire text:

Then, press Del:

When you try to close the editor, an error occurs:

However, the Font is already serialized as null:

As a result, the designer can't be opened any more:

The Cut operations of the RadVirtualGrid does not work.

When the SelectionMode is set to FullRowSelect, MultiSelect = true, and multiple rows are selected, the loop goes something like this:

// Pseudo code:
for(int rowIndex = firstRow; rowIndex <= lastRow; rowIndex++)
{
    AddRowToClipboardData(rowIndex)
    UserDeletedRow(rowIndex);
}

1. Lets say 10 rows are selected, only the even rows get copied. First row 0 is copied and deleted. When row 0 is deleted, all rows move a position down. So when copying row 1, it is actually row 2 that is copyied.
2. When cutting all rows, in my case an exception is thrown, because a rowIndex larger than the number of rows is referred to.
3. When cutting to multiple clipboard formats, the second format will not contain the original selected data, because it has already been deleted.

My suggestion:

1. First copy all the data and formats to the clipboard.
2. Then delete the selected rows.

The method GridViewTemplate.SetError creates in most situations an GridViewDataErrorEventArgs object twice.

Current code:

GridViewDataErrorEventArgs args = new GridViewDataErrorEventArgs(exception, 0, 0, GridViewDataErrorContexts.Commit);
if (e != null)
{
    args = new GridViewDataErrorEventArgs(exception, e.ColumnIndex, e.RowIndex, GridViewDataErrorContexts.Commit);
}

In assume in most cases e will not be null, so in must cases the first args will be removed. This has a small negative impact on memory and performace.

Suggestion:

GridViewDataErrorEventArgs args = e == null 
    ? new GridViewDataErrorEventArgs(exception, 0, 0, GridViewDataErrorContexts.Commit)
    : new GridViewDataErrorEventArgs(exception, e.ColumnIndex, e.RowIndex, GridViewDataErrorContexts.Commit);

After installing R3 2022, the QuickStart example can't be run:

Repro-steps

1. Create a Form
2. Add a RadGridView control
3. Add two Text columns
4. Run the form
5. Add a new row to the RadGridView with values "a" and "b"
6. Add a another row to the RadGridView with values "c" and "d"
7. Select the first row and copy the row values
8. Select the first cell of the second row and paste the values

Expected behavior

• The values "a" and "b" are in the second row

Observed behavior

• The values "ab" and "d" are in the second row

Repro-steps

1. Create a Form
2. Add a RadGridView control
3. Add two Text columns
4. Run the form
5. Add a new row to the RadGridView with values "a" and "b"
6. In Excel fill a row with two cells with values "c" and "d"
7. Select those cells and copy them to the clipboard
8. In the RadGridView select the first cell of the row
9. Paste the data

Expected behavior

• The values "c" and "d" are in the row

Observed behavior

• The values "System.IO.MemoryStream" and "b" are in the row

Extra info

If the first column is of another type (like GridViewDecimalColumn) a DataError occurs (because "System.IO.MemoryStream" cannot be parces to a decimal).

To reproduce the issue, just drag a RadToggleSwitch to the form. Then, at run time call the method:

radToggleSwitch1.SetToggleState(newValue: false, animate: false);

You will notice that the colors are changed but the thumb is not moved: 

Workaround:

            this.radToggleSwitch1.AllowAnimation = false;
            this.radToggleSwitch1.Toggle();