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 ;) 

 

Windows Forms on .net 6.0 / 7.0 / 8.0 diverges more and more from .net Framework 4.x.

Please release a version of the Demo Application that is based on the current Microsoft Release.

Hi

It would be cool if the SyntaxEditor automatically changed the default palette if the selected scheme was dark.

Regards

Erwin

Hi,

Please, add a property  or method to the RadWebCam control to set video bit rate or quality. Currently is fixed a 4 mbits and it results in very poor image quality at high resolutions.

Please find attached images to see the difference  between snapshot and video recording. With fast moving pictures is even worse.

Thanks.

 

RadVirtualGrid is created to support a million records or more. Still it contains some "heavy" operations like CopySelection/CutSelection/Paste which can take a long time.

I would like to intercept these methods so I can show a "Please wait"-window during the operation. Furthermore I have the need to set a flag to true when such a operation is executing. 

Implement the export of notes (footnote, endnote) in the RtfFormatProvider of the RadRichTextEditor.

Remove warning in VS when creating a project using our VS template targeting .Net 6 / 7

Hi,

I want to hide some columns of the table I received from Excel on RadGridView.

The filter UI controls in ASP.NET Core and MVC are really nice, see filter. Can you include the same controls and UI be included in Winforms and WPF?

Hi everybody

 

I m try use the class CustomDragandDrop on radtreeview but i have a issue, 

if i use the next example, i dont have any problem:

      

   protected void BindRadTreeView()
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("Id", typeof(string));
            dt.Columns.Add("Title", typeof(string));
            dt.Columns.Add("ParentId", typeof(string));

            string parentId = string.Empty;
            string childId = string.Empty;
            for (int i = 0; i < 2; i++)
            {
                parentId = Guid.NewGuid().ToString();
                dt.Rows.Add(parentId, "Node" + i, null);
                for (int j = 0; j < 5; j++)
                {
                    childId = Guid.NewGuid().ToString();
                    dt.Rows.Add(childId, "SubNode" + i + "." + j, parentId);
                }
            }

            this.radTreeView1.ChildMember = "Id";
            this.radTreeView1.ParentMember = "ParentId";
            this.radTreeView1.DisplayMember = "Title";
            this.radTreeView1.DataSource = dt;


        }

 

i can drag and drop correctly

 

but the problem is when i binding the Radtreeview

 

                       

    protected void llenatreeview1() {

            dtTablas = dat.consultaBD();

            DataTable dt = new DataTable();
            dtCopi.Columns.Add("Id", typeof(string));
            dtCopi.Columns.Add("Title", typeof(string));
            dtCopi.Columns.Add("ParentId", typeof(string));

            string parentId = string.Empty;
            string Id = string.Empty;
            string title = string.Empty;
            foreach (DataRow row in dtTablas.Rows)
            {
                parentId = row["ParentId"].ToString();     

                Id = row["Id"].ToString();
                title = row["Title"].ToString();

                if (parentId == "")
                    dt.Rows.Add(Id, title, null);
                else
                    dt.Rows.Add(Id, title, parentId);
            }

            radTreeView2.ChildMember = "Id";
            radTreeView2.ParentMember = "ParentId";
            radTreeView2.DisplayMember = "Title";
            radTreeView2.DataSource = dt;
        }

first is freeze and then appears the error.

when i drag and drop appears then next error:

System.StackOverflowException

 

what am I doing wrong please your help. thanks

GridView has a default text alignment for new columns as 'MiddleCenter'.

Default alignment for new GridViewDataRowInfo is 'left'.

Please can these be the same ?

It would be nice if the grid column chooser would support grouping of columns similar to the jquery grid

I would like to have a generic validation-mechanism, implemented in all controls. Hear me out:

A class ValidationInformation for containing all sort of validation information for a certain field, property, cell, etc. which has properties likes:

• Type DataType
• object MinValue
• object MaxValue
• int? MinLength
• int? MaxLength
• bool IsRequired
• RegEx Mask
• etc.

It also has a virtual method like bool Validate(object entity, object value, out string validationError).

A base class ValidationInformationProvider for retrieving validation information from various sources. It has some abstract methods for retrieval, storing/caching information per cell/field/property.

This base class has the following subclasses:

• ValidationInformationProviderFromDataTable
• ValidationInformationProviderFromAnnotations
• ValidationInformationProviderFromXXX

Each provider is responsible for reading validation information from the source (DataTable, annotations on a property, etc.) and fill a ValidationInformation object.

Now the fun begins...

Each Telerik class, like RadGridView and/or subcomponents should get a method or event to retrieve ValidationInformation. When the event is not handled or the method returns null, the default behavior kicks in.

When ValidationInformation is provided, default behavior is overridden. Properties of editors van be set with values from ValidationInformation (like Minimum and Maximum of a GridViewDecimalColumnPlus or RadSpinEditorElement). At the end if editing the method ValidationInformation.Validate is called to validate the new value. The validation error can be used for popups, or tooltips, or an exception. 

This way a user does not have to think where to set which property of any Telerik control for any validation. This way a RadPropertyGrid and RadGridView can work the same way when it comes to data validation, regardless of all editors which work in the background. 

Create a Compact Windows 11 theme that can be used in existing applications with non-touch themes. 

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;
			}
		}
	}
}

Please update your tokanizer to increase performance. While you are at it:

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

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.

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

 

 

A control that can be used to display an icon in the Windows taskbar notification area.

• 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.

Request a JSON tagger for the SyntaxEditor