Unplanned
Last Updated: 27 Jun 2025 01:51 by Suresh
Created by: Suresh
Comments: 2
Category: UI for WinForms
Type: Bug Report
0
In this particular case, the main monitor on which the Form is shown is 225. While the application is running, the DPI is changed to 100%. The controls size is scaled correctly, however, the Font inside the controls is not.
Unplanned
Last Updated: 27 May 2025 12:05 by ADMIN

Steps to Reproduce:

  1. Create a new WinForms application targeting .NET 9.

  2. Add a RadStatusStrip to the main form.

  3. Run the application.

  4. Snap the form to the left or right edge of the screen (using Windows Snap).

  5. Minimize the form.

  6. Restore the form.

Expected Behavior:
The form should maintain its original size and remain fully visible on screen after being restored.

Actual Behavior:
Every time the form is minimized and restored, it increases in height. After a few cycles, the bottom part of the form — including the RadStatusStrip — becomes hidden behind the Windows taskbar (Start menu).

Additional Info:

  • The issue only occurs when a RadStatusStrip is added to the form.

  • The issue does not occur when using a standard StatusStrip from WinForms.

  • The problem occurs consistently and can be reproduced easily.

  • Tested both in debug mode and with a compiled executable.

Attachments:

  • Screenshots (before and after restore).

  • Sample reproduction project (if needed).

    This is only repeated in windows 10
     
Unplanned
Last Updated: 16 May 2025 14:09 by ADMIN

Using specifically Win11 Compact DARK theme has additional space compared to the Win11 Compact LIGHT theme. See the pictures.

  • On Light theme there are 4 pixels between the form border and the top border of a tab.
  • On Dark theme there are 12 pixels between the form border and the top border of a tab.

In my opinion the dark theme has a wrong height here and the light theme is correct, especially compared to other themes, even Office 2019 for example.

Light theme:

Dark theme:

Unplanned
Last Updated: 12 Jul 2024 09:01 by ADMIN

Any anchor setting works, except for right + left, then the controls start to behave weird. 

this.radMultiColumnComboBox4.Anchor = AnchorStyles.Left | AnchorStyles.Right;
this.radTextBoxControl2.Anchor = AnchorStyles.Left | AnchorStyles.Right;
this.radSpinEditor4.Anchor = AnchorStyles.Left | AnchorStyles.Right;
this.radDropDownList4.Anchor = AnchorStyles.Left | AnchorStyles.Right;

this.radMultiColumnComboBox3.Anchor = AnchorStyles.Left | AnchorStyles.Right;
this.radDropDownList3.Anchor = AnchorStyles.Left | AnchorStyles.Right;
this.radSpinEditor3.Anchor = AnchorStyles.Left | AnchorStyles.Right;
this.radTextBoxControl1.Anchor = AnchorStyles.Left | AnchorStyles.Right;

Unplanned
Last Updated: 18 Jun 2024 10:16 by ADMIN
In this scenario, a new archive is created in code and two files are added to the archive. The archive is protected with a password. When trying to open the file inside and typing the correct password, a message appears with a text that the typed password is incorrect.
Unplanned
Last Updated: 21 May 2024 10:33 by ADMIN
The location of controls is messed up when RadForm is shown runtime on HDPI (125%).
Unplanned
Last Updated: 24 Apr 2024 08:22 by ADMIN
Exceptions

Top Level Exception
Type:        System.OverflowException
Message:     Arithmetic operation resulted in an overflow.
Source:      TelerikCommon
Stack Trace: at Telerik.WinControls.NativeMethods.GetMonitorDpi(Screen screen, DpiType dpiType)
   at Telerik.WinControls.VisualElement.GetScaledFont(Single scale, Font fontToScale)
   at Telerik.WinControls.UI.LightVisualElement.CreateTextParams()
Unplanned
Last Updated: 30 Sep 2024 08:25 by ADMIN

In this case, we have an MS standard Form with control position on the form. Each of the controls has the right anchor. Moving the form to a monitor with a higher resolution messed up the size of the controls. 

Unplanned
Last Updated: 08 Feb 2024 12:19 by Al

In the image below you can notice lines that disappear, identical lines but rendered more or less thick.

Unplanned
Last Updated: 02 Feb 2024 13:31 by ADMIN
Dynamically adding command bar buttons to a control inside a popup window may cause layout issue.
Unplanned
Last Updated: 30 Jan 2024 14:14 by ADMIN
To reproduce setup a column ColumnGroupViewDefinition, set RightToLeft mode of the grid and export it using the GridViewPdfExport class.
You will see that in the exported PDF document the columns and column groups are in Left-To-Right order.
Unplanned
Last Updated: 29 Jan 2024 15:46 by ADMIN

In the exported PDF document, the font size of the header and footer is smaller than the font of the data cells, even though the specified font is the same size.
To reproduce set the same font to the header and data cells:

pdfExport.HeaderFont.Font = new Font("Segoe UI", 10f);

private void PdfExport_CellFormatting(object sender, PdfExportCellFormattingEventArgs e)
{
    e.CellElement.Font = new Font("Segoe UI", 10f); 
}

Unplanned
Last Updated: 29 Sep 2023 09:36 by ADMIN

Using Telerik button and dropdown beside and anchored to a standard label or textbox then, when run app in a Win 11 in Korean, the presentation is not correct.

Expected result:

Observed result:

Unplanned
Last Updated: 04 May 2023 12:58 by ADMIN
The CurrentDirectoryPath property is not serialized and it is lost every time the designer is reopened.
Unplanned
Last Updated: 21 Mar 2023 09:12 by ADMIN
Created by: Martin
Comments: 1
Category: UI for WinForms
Type: Bug Report
0

Repro steps:

  1. Create a RadVirtualGrid with:
    1. A column with a nullable DateTime
    2. Another column with a string or number.
  2. Fill it with one or more rows. The DateTimes remain null.
  3. Edit a DateTime cell, open the dropdown:

  4. Click op button [Today], the date/time in the cell changes.
  5. Click [Tab], the focuses moves to the next cell, but the dropdown remains open:
  6. Click somewhere else in the grid or form, an Exception is thrown:
System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.RadDateTimePickerCalendar.popupControl_Closing(Object sender, RadPopupClosingEventArgs args)

Expected behavior:

  • The dropdown closes after moving to another cell.
  • No exception occurs.

 

 

Unplanned
Last Updated: 01 Mar 2023 13:08 by ADMIN

To reproduce:

            this.radCheckBox1.Text = "Something (in brackets)";
            this.radCheckBox1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;

Unplanned
Last Updated: 06 Mar 2023 09:55 by ADMIN
Open the designer of the attached form. Have a look at the locations for the cbSegmentacion and btnActivaDesactivaCentrradoLinea controls. Close and reopen the designer. You will see that the location is changed.
Unplanned
Last Updated: 28 Nov 2022 07:50 by Shaindy
 The styles of a hyperlink (color, font properties) are not exported correctly to HTML
Unplanned
Last Updated: 29 Sep 2022 13:03 by ADMIN
Created by: erwin
Comments: 3
Category: UI for WinForms
Type: Bug Report
1

To replicate the missing button when the application is run on my main monitor with 150% DPI scaling:



If the RadControl.EnableRadAutoScale property is set to false in the Program.cs file, the button is placed as expected:



When I replace the form to inherit from RadForm, not the MS Form, the button is clipped:

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