We work with a RadGridView with 145000 rows and 4 columns. We use copy-paste to move data around from other apps and the application with build with Telerik.

When we copy a flat file (with tabs delimited fields) and we paste it to the RadGridView, the whole process is painfully slow. The function to retrieve the data from the clipboard takes minutes (maybe hours, I cancelled it). It tracked the cause down to the StringTokenizer class. The tokenizer splits the string up into separate fields. But after extracting a field it creates a new copy of that string (containing about 10MB of data) minus the field. I patched it (with HarmonyX) and now it takes only one second:

static class StringTokenizerPerformancePatch
{
	static private readonly InstanceFieldAccessor<StringTokenizer, LinkedList<string>> _tokens = new InstanceFieldAccessor< StringTokenizer, LinkedList<string>>("tokens");
	static private readonly InstanceFieldAccessor<StringTokenizer, string> _sourceString = new InstanceFieldAccessor<StringTokenizer, string>("sourceString");
	static private readonly InstanceFieldAccessor< StringTokenizer, string> _delimiter = new InstanceFieldAccessor<StringTokenizer, string>("delimiter");
	static private readonly InstanceFieldAccessor< StringTokenizer, IEnumerator<string>> _enumerator = new InstanceFieldAccessor<StringTokenizer, IEnumerator<string>>("enumerator");

	[HarmonyPatch(typeof(StringTokenizer), "Tokenize")]
	staticclassPatch_StringTokenizer_Tokenize
	{
		static bool Prefix(StringTokenizer __instance)
		{
			var tokens = _tokens.GetValue(__instance);
			var sourceString = _sourceString.GetValue(__instance);
			var delimiter = _delimiter.GetValue(__instance);
			Tokenize(tokens, sourceString, delimiter);
			_enumerator.SetValue(__instance, tokens.GetEnumerator());
			returnfalse;
		}

		static private void Tokenize(LinkedList<string> tokens, string text, string delimiter)
		{
			tokens.Clear();
			
			if (string.IsNullOrEmpty(text))
				return;

			int index = 0;
			while(true)
			{
				var index2 = text.IndexOf(delimiter, index, StringComparison.Ordinal);
				if (index2 < 0)
				{
					tokens.AddLast(text.Substring(index));
					break;
				}

				string token = text.Substring(index, index2 - index);
				tokens.AddLast(token);
				index = index2 + delimiter.Length;
			}
		}
	}
}

• If delimiters are one character, why not use String.Split?
• Why use a LinkedList?

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); 
}

It would be great if there were a right-click menu option for custom Rad controls to "apply the theme to all sub-controls", similar to how Forms work.

I've attached images to illustrate the functionality.

Right now it only works for forms, and my custom controls have to be manually adjusted one at a time, by hand, which is time consuming and error prone.

It would save a lot of time and reduce the chance of missing a control when applying themes locally.

Right now the only way to apply themes is either globally or individually by hand, or with a find-replace-in-files command on the ThemeName property.

To reproduce RadGridView (or other RadControl) flooding WM_TIMER messages do the following

1. Create a simple WinForms project with a RadGridView in it.

2. Open spy++ tool (it comes with Visual Studio).

3. Attach the process that is running the WinForms and choose to display its messages.

4. You should now see a lot of WM_TIMER messages as shown in the gif file.

Hello,

Our product uses Infragistics controls. We have been in business for 21 years and since then we have been using Infragistics controls for WinForms. We would like to move to Telerik controls for WinForms, even though we already use Telerik controls for Blazor. Is there an easy way to convert them? Is there any plan to release a tool to convert them automatically? It will be very helpful and I am sure many companies are interested as well.   

Thank you

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:

• Control Structure Pane - For example, RadForm has a RadTitleBarElement, which contains no styles, because they are inherited from the RadTitleBar control. Here we can add a note, which says from which control the styles are inherited:
  
• Design / Preview Pane - Click on an element from the Design view and select it into the control element tree.
• Elements Pane - Add an option to expand all sub-nodes in the Control Structure tree. Save the setting for the filter chosen by the user.
• Find repository usages: Add an option to expand all sub-nodes.
• Repositories - Sort applied repositories on top or in another list. Currently, we can see all the applied only when we click "Show only applied repositories".
• Repositories - Add an option to filter the repositories by type(font, fill, border, image, and so on). Currently, we can filter them only by name.

Dear,

I wonder if it is possible to consult the release history by product & control & version, next to the (already existing) release history by product & version & control?

This feature has benifits:

• see how a given control evolves in time
• quickly find if a bug/feature has been implemented by control

This request can be applied for all your products.

Kind regards,

Peter

Dear Telerik Team!

Even though your components are one of my favourite 3rd party tools that I use in software development for years now; I have to rise a bug ticket for component called "TelerikMultiSelect". The problem is that when the autocomplete box's data source is updated for the first time using a timer's event the autocomplete box remains empty and I have to click outside and the inside of the input again.

Please consider investigating and fixing this issue.

Kind Regards,

Balázs Koncz

Hi guys,

              It would be great to be able to set the day start/finish times in your Scheduler.

Your Scheduler control is fantastic, but I am building a Scheduler for a company that operates over 24hrs and the shift hours are

6am - 6pm

6pm - 6am

both shifts are classed as being the same day even though the nightshift crosses over to the next day.

I would like to be able to adjust the 24hr period that defines a day so that in month view the appointment will not carry over to the next shift.

and in day view, the schedule will start at 6am and go through to 6am.

If you could implement this, your scheduler control would be even more powerful and awesome.

Thanks!

Hi Support,

why does PropertyStoreItem has no property "Tag" as other classes?

I had a few scenarios, where I need to store additional informations at the PropertyStoreItem.

Best regards

Fritz

Hi,

We are using Telerik UI WinForms in our project. Current built-in themes are not suitable for our project requirements. We need Visual Studio 2019 Theme for UI WinForms.

As mentioned in the Telerik blog, the latest R3 2019 release of Telerik UI for WPF and Telerik UI for Silverlight is having Visual Studio 2019 Theme.

When can we expect Visual Studio 2019 Theme for UI WinForms? 

When using the RadChartView Proerty Builder, existing series formatting is lost upon clicking ok.

Steps to replicate.

• Setup a new radchartview.
• Add some line series any way you like.
• Define Series color/dashstyle etc either from chart dropdown or from properties list.
• Close and save series properties and you will see current correct formatting in your design view.
• Open RadCharView property Builder.  Click ok.
• Series formatting has been reset to default new series colors/styles.

http://demos.telerik.com/aspnet-ajax/treelist/examples/overview/defaultcs.aspx