The issue can be reproduced by setting the AssociatedControl property in the designer and later at run-time.

ArgumentNullExceptionn in the RadPropertyValuesCollection class.

Currently, the event arguments do not expose the data item.

The issue can be reproduced on a touch device after performing zoom in and zoom out

ChartPanZoomController panZoomController = new ChartPanZoomController();
panZoomController.PanZoomMode = ChartPanZoomMode.Both;
this.radChartView1.Controllers.Add(panZoomController);

 

The issue can be observed in themes having shadows:

- Material 

- Fluent

Use attached to reproduce (the orientation must be set at design time)

Workaround:

Set it in code:

commandBarToggleButton2.Orientation = Orientation.Vertical

Using the RadDocumentEditor class, the users can change the margin of the current section. However, there isn't a method allowing them to change the default section margin of the document. 

Use attached to reproduce. 

One should not be able to use the ribbon bar buttons when a protected document is opened or the rich text editor is read-only. 

Caret jumps several symbols to the right when arabic or persian is used and user deletes the dot symbol. As a result the wrong symbol is deleted.

Other themes are also missing the IsSelected state, the fix should also handle them.

To reproduce:

-double click an option in the MultiColumnCombobox editor and close the editor in the selected index changed event.

The performance of the DayView when the control is bound to a large number of recurring appointments and it is grouped by resources needs to be improved.

Use attached to reproduce.

AutoCompleteSuggestHelper, Assembly: Telerik.WinControls.UI, Version=2019.1.117.40

 

Isnt the hilighted line (contains branch) very unoptimized.

https://rhale78.wordpress.com/2011/05/16/string-equality-and-performance-in-c/

Multiple ToLower string operation. Why not let the framework do the operation since you are always using ordinal?

optimized version: return item.Text.Contains(this.Filter, StringComparison.OrdinalIgnoreCase);

 

protected virtual bool DefaultFilter(RadListDataItem item)
    {
      switch (this.suggestMode)
      {
        case SuggestMode.StartWiths:
          return item.Text.StartsWith(this.Filter, this.StringComparison);
        case SuggestMode.Contains:
          if ((this.StringComparison & StringComparison.InvariantCultureIgnoreCase) == StringComparison.InvariantCultureIgnoreCase || (this.StringComparison & StringComparison.InvariantCultureIgnoreCase) == StringComparison.CurrentCultureIgnoreCase)
            return item.Text.ToLower().Contains(this.Filter.ToLower());
          return item.Text.Contains(this.Filter);
        default:
          return item.Text.StartsWith(this.Filter, this.StringComparison);
      }
    }

 

See the attached screenshot

To reproduce:

Copy an image and paste is several times inside the document.

To reproduce:

- Open the Print Preview dialog and select "Print Entire Workbook"

- Nothing happens and only the current sheet is printed

Workaround:

private void RadDropDownButton1_DropDownOpening(object sender, EventArgs e)
{
    var args = e as RadPopupOpeningEventArgs;
    var popupSize = radDropDownButton1.DropDownButtonElement.DropDownMenu.Size;
    var x = args.CustomLocation.X - (popupSize.Width - radDropDownButton1.Width);
    args.CustomLocation = new Point(x, args.CustomLocation.Y);
}

The new series will be similar to the RadarColumnSeries which is already available. https://docs.telerik.com/devtools/aspnet-ajax/controls/htmlchart/chart-types/polar-chart