To reproduce:

1. Add three SplitPanels in horizontal mode.

2. Use the following code snippet.

3. Drag the second splitter upwards. It changes the height on the first panel

void RadForm1_Load(object sender, EventArgs e)
{
    FixHeight(splitPanel1);
    FixHeight(splitPanel3);
}

public static void FixHeight(SplitPanel panel)
{
    panel.SizeInfo.MinimumSize = new Size(0, 55);
    panel.SizeInfo.MaximumSize = new Size(0, 55);
}

The selected date is 2024 Feb 29. A custom date format is applied to the control:

this.radDateTimePicker1.Format = DateTimePickerFormat.Custom;
this.radDateTimePicker1.CustomFormat = "yyyy";

When trying to change the date, an ArgumentOutOfRangeException exception is thrown.

There is a small grey row around the titlebar, above the text. Also, two gray pixels above the title bar. See picture:

Please refer to the attached gif file.

Workaround: close manually the drop down list when the auto-complete popup is shown:

    this.radDropDownList1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
    this.radDropDownList1.DropDownListElement.AutoCompleteSuggest.DropDownList.PopupOpened+=DropDownList_PopupOpened;

private void DropDownList_PopupOpened(object sender, EventArgs e)
{
    this.radDropDownList1.CloseDropDown();
}

I have created a RadForm in a sample winforms project and dropped a RadPageView control on the form. Then created three pages and dropped a user control on the page 1 and page 2. Now when I navigate to page 3 from page and page 2 then Visual Studio gets not responding and crashes later.

I am recently downloaded the trial version of Telerik Winforms(2024.2.514) and found this issue with User controls. Previous versions also have same issue.

Recording of the issue as well as sample project is attached.

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?

In this case, we have missing image tiles while zooming and scrolling the map. When downloading a tile, the internal WebClient is returning an error with the following message: The server committed a protocol violation. Section=ResponseStatusLine. The WebException does not have a Response. This scenario is not handled in code which will lead to missing image tiles. Zooming the same area will reload the missing tiles, but still, it should be handled in the source code.

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;

I have implemented the ListDataValidationRule code to add a dropdownlist to the spreadsheet. Based on the code I can find and the searching I have conducted, it seems to be correct, however the dropdown does not appear in the control.

The dropdown list does appear in Excel when I export the file.

In this particular case, the control is populated with 100 000. When all items are selected and we click on a single note all other items will be de-selected. This operation takes more time than expected. The de-selection process must be improved.

We are trying to display read only versions of documents. Some of these documents are of type .docm and have elements like dropdowns and text boxes. Most of the documents are being converted properly but all text within these .docm elements are missing. We have tried loading into the RadRichTextBox control and directly exporting to plain text with no luck. We do not need full support for these elements but in order to use Telerik's library for our document viewer we need to be able to at least extract text from these elements.

Is this currently unsupported or is there some other provider I should be using?