By default, if you need to format the cells in RadCalendar, the ElementRender event is an appropriate solution. However, it doesn't process the row/column header cell elements illustrated in the attached screenshot.

Workaround:

            MonthViewElement mve = (MonthViewElement)this.radCalendar1.CalendarElement.CalendarVisualElement;
            foreach (CalendarCellElement cell in mve.TableElement.Children)
            {
                if (cell.Row == 0)
                {
                    cell.DrawFill = true;
                    cell.BackColor = Color.Red;
                } 
            } 

Please refer to the attached sample project and run it. Select a random item and press the button. You will obtain the error. If no selection is available, the item is removed as expected. 

Workaround: use Begin/EndUpdate block while deleting a record from the DataTable:

        Me.RadGanttView1.BeginUpdate()
        _dataset.Tables("Tasks").Rows.RemoveAt(2)
        Me.RadGanttView1.EndUpdate()

Please run the attached sample project and follow the steps illustrated in the attached gif file. The following exception occurs:

System.ArgumentException
  HResult=0x80070057
  Message=Rectangle '{X=0,Y=35,Width=156.3333,Height=0}' cannot have a width or height equal to 0.
  Source=System.Drawing
  StackTrace:
   at System.Drawing.Drawing2D.LinearGradientBrush..ctor(RectangleF rect, Color color1, Color color2, Single angle, Boolean isAngleScaleable)
   at System.Drawing.Drawing2D.LinearGradientBrush..ctor(RectangleF rect, Color color1, Color color2, Single angle)
   at Telerik.WinControls.UI.Gauges.LinearGaugeBrushFactory.CreateBrush(GaugeVisualElement owner, GaugeBrushType type)
   at Telerik.WinControls.UI.Gauges.LinearGaugeBar.Paint(Graphics graphics, Rectangle boundingRectangle)
   at Telerik.WinControls.UI.Gauges.LinearGaugeBar.PaintElement(IGraphics graphics, Single angle, SizeF scale)
   at Telerik.WinControls.RadElement.DoOwnPaint(IGraphics graphics, Single angle, SizeF scale)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChild(RadElement child, IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChild(RadElement child, IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadControl.OnPaint(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

IMPORTANT: If both colors are changed at design time and you set the Value of RadLinearGauge to 0, this will provoke a similar error leading Visual Studio to crash.

Workaround: specify a minimum width/height for the gauge:

this.radLinearGauge1.MinimumSize = new Size(1, (int)this.linearGaugeBar1.Offset+1);

 

 

To reproduce:
1. Add a pin to the map.
radMap1.Layers.Add(new MapLayer("PinLayer"));
MapPin pin = new MapPin(new Telerik.WinControls.UI.Map.PointG(47.60357, -122.32945));
pin.BackColor = Color.Red;
radMap1.Layers[0].Add(pin);
2. Run the project and zoom out.
3. Resize vertically the map(form).

Workaround:
Call Pan method to recalculate RadMapElement.ViewportInPixels on SizeChanged. 
private void RadMap1_SizeChanged(object sender, EventArgs e)
{
    this.radMap1.Pan(this.radMap1.MapElement.PanOffset.Width, this.radMap1.MapElement.PanOffset.Height);
}

To reproduce:

private void RadButton5_Click(object sender, EventArgs e)
{
    RadButton labelControl = new RadButton();
    labelControl.Size = new Size(200, 30);
    labelControl.Text = "Test";

    layoutControlItem1.AssociatedControl = labelControl;
}

Workaround: 
private void RadButton5_Click(object sender, EventArgs e)
{
    RadButton labelControl = new RadButton();
    labelControl.Size = new Size(200, 30);
    labelControl.Text = "Test";

    ((RadLayoutControlControlCollection)this.radLayoutControl1.Controls).RemoveInternal(layoutControlItem1.AssociatedControl);
    ((RadLayoutControlControlCollection)this.radLayoutControl1.Controls).AddInternal(labelControl);
    layoutControlItem1.AssociatedControl = labelControl;

    layoutControlItem1.UpdateControlBounds();
   
}

If I set .InitialDirectory to a network path, the Tree Navigation Pane shows multiple instances of the network path. I've collapsed several of them so you can see it more easily in the image. Am I missing a setting? Can this be prevented in the Directory Requesting sub?

Maybe I'm doing this wrong but it works with the standard .Net SaveFileDialog. No matter how many filters I add or which FilterIndex I set, the last filter is always activated.

To reproduce:

this.radMaskedEditBox1.Mask = "n";
this.radMaskedEditBox1.MaskType = Telerik.WinControls.UI.MaskType.Numeric;
radMaskedEditBox1.Value = 1234;
radMaskedEditBox1.MaskedEditBoxElement.Culture = new CultureInfo("en-CA") { NumberFormat = { NumberDecimalDigits = 0, NumberGroupSeparator = String.Empty } };

 

Please run the attached sample project. Select one of the child tasks and click the button. The new task is expected to be inserted at the selected item's position. However, it is appended at the bottom as it is demonstrated in the gif file.

Workaround: rebind RadGanttView after inserting a new row to the DataTable: 

    Private Sub RadButton1_Click(sender As Object, e As EventArgs) Handles RadButton1.Click
        Try
            If Me.RadGanttView1.SelectedItem IsNot Nothing Then
                Dim i_rowIndex As Int32 = _dataset.Tables("Tasks").Rows.IndexOf(Me.RadGanttView1.SelectedItem.DataBoundItem.Row)
                Dim i_datarow As DataRow = _dataset.Tables("Tasks").NewRow
                Dim i_startDate As Date = New Date(Today.Year, Today.Month, Today.Day, 8, 0, 0)
                i_datarow("ID") = 3001
                i_datarow("ParentID") = _projektID
                i_datarow("Bezeichnung") = "inserted Aufgabe"
                i_datarow("Start") = i_startDate.AddHours(6 * 5)
                i_datarow("Ende") = i_startDate.AddHours(6 + 100)
                _dataset.Tables("Tasks").Rows.InsertAt(i_datarow, i_rowIndex)
                Me.RadGanttView1.DataSource = Nothing
                With Me.RadGanttView1.GanttViewElement
                    .TaskDataMember = "Tasks"
                    .ChildMember = "ID"
                    .ParentMember = "ParentID"
                    .TitleMember = "Bezeichnung"
                    .StartMember = "Start"
                    .EndMember = "Ende"
                End With
                Me.RadGanttView1.DataSource = _dataset
            End If
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub

 

Please run the attached sample and move the spreadsheet on a monitor with 125% DPI scaling. Then, enter some text in the first cell that exceeds the column's width and double-click the header to best-fit the column. You will notice that RadSpreadsheet hangs and it is not possible to proceed with the further execution of the form.

Inside the constructor of a form create a pie series and populate it with data. Then add it to a RadChartView. You will notice that there are two legend items per data point.

I have RadDiagram on Form and registered ShapeDoubleClicked event on it.

After double click on a shape I open another modal form (let's call it form2). The second mouse click is fired on a modal form (Form2) which in some cases, based on shape position in Form1 (precisely when the shape is in center of the screen), change the state of my ToogleSwitch which is in center of Form2.

https://docs.telerik.com/devtools/winforms/controls/gridview/filtering/setting-filters-programmatically-(composite-descriptors)

When creating a composite filter descriptor with a value that contains an array of enums, it generates an expression with IN, and an exception is thrown when adding it to the FilterDescriptors on a RadGridView control.

 

Exception Message:

{"The expression contains undefined function call In()."}

 

The expression value is: ([RandomPropertyName] IN (1,3,9) OR [RandomPropertyName] = 10)

 

We have recently upgraded from 2015.2.728.40 (where this worked) to the Feb. 2019 version, then today upgraded to the May 2019 version. The issue remains.

 

The project includes the following Telerik references:

 

Telerik.WinControls

Telerik.WinControls.GridView

Telerik.WinControls.PdfViewer

Telerik.WinControls.RadDock

Telerik.WinControls.RadMarkupEditor

Telerik.WinControls.UI

Telerik.Windows.Documents.Core

Telerik.Windows.Documents.Fixed

Telerik.Windows.Zip

TelerikCommon

 

Please run the attached sample project. 

1. Click the Child Form button.

2. Maximize the MDI child form either by clicking the maximized button or by double-clicking the title bar.

You will notice that there is an empty space between the docked command bar and the top edge of the form.

 

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);
}

One should be able to manually add recently used fonts

To reproduce:

Type a word and then change the font. The RichTextEditor is not focused. When you click in it the font is restored.

Workaround: 
class MyRichtTextEditorRibbonbar : RichTextEditorRibbonBar
{
    public MyRichtTextEditorRibbonbar()
    {
        this.dropDownListFont.PopupClosed += DropDownListFont_PopupClosed;
    }

    private void DropDownListFont_PopupClosed(object sender, RadPopupClosedEventArgs args)
    {
        this.associatedRichTextEditor.Focus();
    }

  
}

When trying to collapse the ProgressBar inside the StatusStrip, the ProgressBar is been hidden not collapsed.

Workaround:

Create a RadRibbonForm.
Set the ApplicationMenuStyle of RibbonBar to BackstageView
Run the form and maximize it.
Open BackstageView and you will see that part of the form is drawn outside of the screen.

Please refer to the attached gif file. You will notice that the help button's style is different