After more than 10 years this is STILL a Bug. 

https://feedback.telerik.com/winforms/1369181-fix-radgroupbox-with-collapsed-header-does-not-fill-the-entire-content-if-there-is-a-docked-child-control-inside-the-groupbox

The groupbox header does not collapse when I put a table layout panel inside of it.

Is this product (Telerik for winforms) still being supported? Or should I be looking elsewhere for a different controls toolkit solution for my company?

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;

Hi,

I added a screen with RadSpreadsheet on it. When I open that screen from the parent screen, the DPI (scale) of the whole application changes.

Please find the source in the attachment.

The annotation line is supposed to be at 05 point but instead it is between 05 and 06.

Hi All.

Could you please add or let me know locators for "RadChat" window for Automation purpose. I am unable to find locators on the below area.

In.NET8 Microsoft has released databinding improvements: What's new in Windows Forms .NET 8 - Windows Forms .NET | Microsoft Learn. Add Command Binding and DataContext Support in .NET 8+

When a RadValidationRule has the "PropertyName" assigned to a non-existent property, the RadVAlidationProvider.ValidateCore throws a NullReference exception because the property cannot be found via reflection and throws no error handling.

From OpenEdge ABL class, this is the code written into the forms InitializeComponent method.  The "IsValid"  property doesn't actually exist.

        radValidationRule3:AddControl(THIS-OBJECT:myTextBox).         radValidationRule3:Operator = Telerik.WinControls.Data.FilterOperator:IsNotEqualTo.         radValidationRule3:PropertyName = "IsValid".         radValidationRule3:ToolTipText = "Test".         radValidationRule3:Value = TRUE.

While we don't expect the functionality to actually work because the property isn't actually available to .NET, but the NullReferenceException is poorly handled.

I've attached a screenshot of the bit of code from RadValidationProvider.ValidateCore where this occurs.  This is from version 2020.3.1020.20

Here is the thrown stack exception details from visual studio.

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Telerik.WinControls.UI
StackTrace:
at Telerik.WinControls.UI.RadValidationProvider.ValidateCore(Object sender, EventArgs e)

This

Documentation about High-DPI mechanisms available on the website is very outdated and mostly does not consider the changes and improvements that Microsoft made with .net 7.0 and 8.0.

What's needed is thorough documentation about Telerik's behavior in comparison with the different situations on .net Framework 4.9 and the major .net Versions 6.0, 7.0, and 8.0.

Kind regards

Erwin

I’m converting 20+ year old c# .net winform software that a clever internal ex dev wrote a themed control suite for. I’ve been working with those controls for almost the same length of time but am recently tasked with updating the whole app as customers are experiencing fall overs on some modern versions of Windows. Ive had the pleasure of (almost quietly ?) converting/updating by using Telerik for many years as my choice of replacement themed control systems.

Conversion experience has been pretty good, except for combo boxes, probably listboxes too (sorry guys Im writing this in bed at 5am so can’t/won’t just go testing). I did try, i think, using your conversion wizards without success. I do wish that you’d let us add any type of object to a combobox.item array in the same way that microsoft winform control allows.
Ive also noticed that some events dont occur in telerik, eg index changed need to be switched to valuechanged and these are only spotted when testing, which means extra work.

anyway. Bless an thanks to you all for my good experience with Progress/Telerik. Im old, poorly and crumbly now and wont be around much longer. May i last long enough not to need a pension to survive and i hope each of you invests in enough private pension to give yourselves a decent holiday or three per year ;)