This bug is about a mismatch between what behaviour is expected (on a functional level) and the actual behavior. There are different scenario's:

A normal example without a bug

int index = myRadGridView.Rows.Add(1, 2, 3); 

Actual and expected behavior

Adds a row to the grid, filling cells with the values 1, 2 and 3. Even when there are more columns than values, only the first 3 cells are filled.

Bug #1

int index = myRadGridView.Rows.Add(); // Will result in: myRadGridView.Rows.Add(new object[0]);

Actual behavior

IndexOutOfRangeException is thrown.

int index = myRadGridView.Rows.Add((object[])null);

int index = myRadGridView.Rows.Add(new GridViewDataRowInfo(...), new GridViewDataRowInfo(...));

// or

int index = myRadGridView.Rows.Add(new object[] { new GridViewDataRowInfo(...), new GridViewDataRowInfo(...) });

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?

See attached screenshot. The popup calendar looks wrong when running on a display with 250% scaling. Surely, that's not correct. The calendar should not be so large and the fonts so small. Am I missing something? I have done all the other steps to enable High DPI support, and as you can see, the textbox area seems to scale fine.

Any ideas?

David

I'd like to have the merge columns mode, for example like TrueDBGrid (desing time)

It's fantastic, and there is the vertical alignment

I've tried all yours codes to emulate it but it's too slow if radgridview has a lot of rows.

Thanks

Reproduction steps:

• Create a new RadPropertyGrid
• Add an instance of a class with at least one property of type Nullable<int>.
• The property does not have an DefaultValueAttribute.
• Make sure that property has the value null.
• In de UI, the field appears to be empty.
• In de UI, click on the field to edit it.

Observed behavior:

• An edit-box appears with the value zero (0).
• Leaving this field (without entering any digits) sets the property with that 0, which is undesirable.

Expected behavior:

• An empty edit-box appears, without any digits.
• Leaving this field (without entering any digits) should keep the property null.
  

Follow the steps:

1. Please enter "0.12345"

2. Using the left arrow navigate after "1" and hit Backspace to delete "1"

3. Enter "6". It would be inserted in the wrong position

Hi,

I am trialing version 2020.2.504.40 from 2017.1.221.40 and have found an issue converting my current project. Before upgrading I need to get this resolved if you could help please?

If you:

• Add a Telerik form to a new WinForms project
• Set FormBorderStyle = Windows.Forms.FormBorderStyle.None
• Set WindowState = FormWindowState.Maximized
• Show the height and width of the form, i.e. in Me.Resize, put Me.Text = "Width: " & Me.Width & ", Height: " & Me.Height

I have a monitor of 1920x1080. When the form is resized it shows a size of 1934x1094. I have tried setting Me.AllowTheming=False (no avail) and also tried in form Properties > FormBehaviour > AllowTheming=False (but to no avail).

The form size works as expected in 2017.1.221.40.

Kind regards,

Matt

An error occur when i used .Import method on large .pdf files (> 1000 ko) with an Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider object.

Message is:

"Impossible d'effectuer un cast d'un objet de type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfDictionary' en type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfInt'." 

There is no bug for smaller pdf files. 

Thank you