In Development
Last Updated: 03 Dec 2021 12:47 by ADMIN
Created by: Sylvain
Comments: 0
Category: Map
Type: Feature Request
When RadMap is panned or zoomed, a respective event should be fired in order to detect the two operations.
Last Updated: 03 Dec 2021 10:59 by ADMIN
The editor size should be limited to the size of the widget. Currently on is able to enter more than one line in a textbox and when the content is not visible and it is cut off when flattening. 
Pending Review
Last Updated: 02 Dec 2021 18:35 by David
Created by: David
Comments: 0
Category: Installer and VS Extensions
Type: Bug Report

When you want to do the Upgrade Wizard, the following error appears: Failed to execute command. System.IO.DirectoryNotFoundException: Could not find a part of the path 'c: \ users \ quinteju \ appdata \ local \ microsoft \ visualstudio \ 16.0_c92db9cd \ extensions \ pfzn5mj3.wxk \ ProjectManagement \ Upgrade \ ScenarioDefinition.xml'. at System.IO .__ Error.WinIOError (Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init (String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHostPath) at System.IO.FileStream..ctor (String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize) at System.Xml.XmlDownloadManager.GetStream (Uri uri, ICredentials credentials, IWebProxy proxy, RequestCachePolicy cachePolicy) at System.Xml.XmlUrlResolver.GetEntity (Uri absoluteUri, String role, Type ofObjectToReturn) at System.Xml.XmlTextReaderImpl.OpenUrlDelegate (Object xmlResolver) at System.Threading.CompressedStack.runTryCode (Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup (TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.CompressedStack.Run (CompressedStack compressedStack, ContextCallback callback, Object state) at System.Xml.XmlTextReaderImpl.OpenUrl () at System.Xml.XmlTextReaderImpl.Read () at System.Xml.XmlLoader.Load (XmlDocument doc, XmlReader reader, Boolean preserveWhitespace) at System.Xml.XmlDocument.Load (XmlReader reader) at System.Xml.XmlDocument.Load (String filename) at Telerik.VSX.WizardEngine.Configuration.ScenarioDefinition.Deserialize (String fileName) at Telerik.VSX.ProjectConfiguration.ProjectConfigurationTypeSelectorBase.GetScenario (ProjectManagementScenarioPath path) at Telerik.WinControls.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.ProjectUpgrade (IPropertyDataDictionary additionalPreWizardData) at Telerik.WinControls.VSX.ProjectConfigurators.StreamlinedProjectConfiguration.StartUpgradeWizard () at Telerik.WinControls.VSPackage.CommandExecutor.Execute (UInt32 commandId) at Telerik.VSX.VSPackage.PackageBase.CommandCallback (Object sender, EventArgs e) 


I already reinstalled three times and it doesn't work in any way.  :(


Last Updated: 01 Dec 2021 13:53 by ADMIN
Release R1 2022

1. Target Framework .NET6 and VS 2022 17.0.1:

2. Install UI.for.WinForms.AllControls.Net60 version 2021.3.1123:

3. Double click the form to open the designer:

4. First try dragging a RadGridView from the toolbox:

5. Install the Nuget package for the toast notification:

6. Install Microsoft.Toolkit.Uwp.Notifications version 7.0.0:

Please make sure that the C:\Program Files (x86)\Progress\ToolboxNuGetPackages folder doesn't contain anything and it is empty. If there is any version available there, please delete it. 

7. Now, try opening the designer. It never loads:



Last Updated: 01 Dec 2021 13:40 by ADMIN

Please refer to the following code snippet: 

        Dim root As New RadTreeNode()
        root.Expanded = True
        root.Text = "Root"
        root.Name = "Root"
        Dim telerikTreeNode = New RadTreeNode With
            .Expanded = True,
            .Name = "Child1",
            .Text = "Child1",
            .Tag = "test",
            .Font = New Font("Arial", 12.0F, FontStyle.Regular)

        For index = 2 To 5
            Dim child As New RadTreeNode()
            child.Text = "Child" & index

Last Updated: 01 Dec 2021 10:49 by ADMIN

When adding a new document to the same instance of a RichTextEditor, the UIProviderRegistry instance of the RichTextBox will keep a dictionary entry for a SectionLayoutBox that contains a reference to a non cleaned up WaterMarkUiProvider.

This SectionLayoutBox in turn has a reference to a DocumentLayoutBox (parent) which has a reference to an old document instance.


A new dictionary entry is added and (retained) for every document loaded.


Disposing the old document makes no difference.



Last Updated: 30 Nov 2021 14:11 by ADMIN

In English: "dog's" is marked as incorrect

In French: "L'ordinateur" is marked as incorrect


Last Updated: 30 Nov 2021 12:06 by ADMIN
StackOverflow exception is thrown in Self-Referencing mode when deleting a child and its parent row
Last Updated: 29 Nov 2021 16:39 by ADMIN
Release R1 2022
It is actually checked and only the appearance is wrong. When the file is saved the checkboxes states are as expected.
Last Updated: 29 Nov 2021 16:38 by ADMIN
Release R1 2022
Please refer to the attached gif file and notice the loading delay when scrolling to a specific page. It would be nice to optimize this experience.
Last Updated: 29 Nov 2021 16:37 by ADMIN
Release R1 2022

Use the following code snippet and enter "8,5" in RadMaskedEditBox. Then press Tab to navigate to the next control: 

        RadValidationRule validationRuleNumberLess;
        RadValidationRule validationRuleNumberGreater;
        float numberMaximum;
        float numberMinimum;

        public RadForm1()
            CultureInfo culture = new System.Globalization.CultureInfo("de-DE");
            System.Threading.Thread.CurrentThread.CurrentCulture = culture;
            System.Threading.Thread.CurrentThread.CurrentUICulture = culture;
            this.radMaskedEditBox1.Culture = culture;

            this.numberMaximum = float.Parse("9,999", culture);
            this.numberMinimum = 0;

            // set maximum
            this.validationRuleNumberLess = new RadValidationRule();
            this.validationRuleNumberLess.Operator = Telerik.WinControls.Data.FilterOperator.IsLessThanOrEqualTo;
            this.validationRuleNumberLess.PropertyName = "Value";
            this.validationRuleNumberLess.ToolTipTitle = "Too big";
            this.validationRuleNumberLess.ToolTipText = "The value must be SMALLER than " + this.numberMaximum.ToString();
            this.validationRuleNumberLess.Value = (float)this.numberMaximum + 0.001D;
            this.radValidationProvider1.SetValidationRule(this.radMaskedEditBox1, this.validationRuleNumberLess);

            // set minimum
            this.validationRuleNumberGreater = new RadValidationRule();
            this.validationRuleNumberGreater.PropertyName = "Value";
            this.validationRuleNumberGreater.ToolTipTitle = "Too small"; // this.localToolTipTitle;
            this.validationRuleNumberGreater.ToolTipText = "The value must be BIGGER than " + this.numberMinimum.ToString();
            this.validationRuleNumberGreater.Operator = Telerik.WinControls.Data.FilterOperator.IsGreaterThanOrEqualTo;
            this.validationRuleNumberGreater.Value = (float)this.numberMinimum;
            this.radValidationProvider1.SetValidationRule(this.radMaskedEditBox1, this.validationRuleNumberGreater);

            this.radLabel1.Text = "Minimum = " + this.validationRuleNumberGreater.Value + " Maximum = " + this.validationRuleNumberLess.Value;

Workaround: use the ControlValidation event to control the validation flag: 

Last Updated: 29 Nov 2021 15:15 by ADMIN
Release R1 2022

Create a RadRibbonForm or a RadForm with Ribbon behavior. When you run the application and maximize the form, the titlebar's text disappears.

Workaround: Use a RadForm and add RadRibbonBar without Ribbon behavior. Then set the RadRibbonBar.RibbonBarElement.RibbonCaption.Visibility to Collapsed.

Workaround 2 : set the RadRibbonForm.AllowAero property to false

Last Updated: 29 Nov 2021 11:16 by ADMIN
Release R1 2022
Created by: Al
Comments: 1
Category: UI for WinForms
Type: Feature Request
Request read only property on the RadMultiColumnComboBox control
Last Updated: 26 Nov 2021 09:57 by ADMIN

1. Add a CommandBarDropDownButton with one RadMenuItem and one RadMenuButtonItem

2. Set the same SvgImage for both items and set the DisplayStyle to Image.

3. If you run the project, you will notice that the RadMenuItem shows the SVG, but the RadMenuButtonItem doesn't show it. 

Workaround: set the RadMenuButtonItem.ButtonElement.SvgImage

Last Updated: 24 Nov 2021 11:57 by ADMIN
Created by: Ken
Comments: 1
Category: TreeView
Type: Bug Report

Please use the attached sample project.

Result in 2021.1.326:

Result in 2021.2.511

Last Updated: 24 Nov 2021 10:09 by ADMIN

To reproduce:

  1. Set your monitor DPI to 200%(or any order value different from 100%). You need to Log off(or restart) in order to apply correctly the new DPI settings.
  2. Create a UserControl with some RadControls inside.
  3. Add the UserControl at design time as a child control to a RadForm.
  4. Run the RadForm and you will see that the controls inside the user control are scaled twice.


In the OnLoad method of RadForm do through all nested RadControls inside the UserControl and downscale them to the same DPI as the RadForm.

public class RadForm1 : RadForm
    protected override void OnLoad(EventArgs e)

        SizeF dpiScaleFactor = RootElement.DpiScaleFactor;
        FixDpiScaling(this.Controls, dpiScaleFactor);

    private void FixDpiScaling(Control.ControlCollection controls, SizeF dpiScaleFactor)
        foreach (Control item in controls)
            RadControl radControl = item as RadControl;
            if (radControl != null)
                SizeF dpi2 = radControl.RootElement.DpiScaleFactor;
                if (dpiScaleFactor.Width != dpi2.Width)
                    SizeF fixDpiCoefficient = new SizeF(dpiScaleFactor.Width / dpi2.Width, dpiScaleFactor.Height / dpi2.Height);

            FixDpiScaling(item.Controls, dpiScaleFactor);

Last Updated: 23 Nov 2021 09:48 by ADMIN
Release R3 2021 SP2
Small elements with large scale transformation are not rendered
Last Updated: 23 Nov 2021 09:48 by ADMIN
Release R3 2021 SP2

Hi Sir,

We updated telerik and facing some issues with that.

in new update with rich text editor has new property called  MentionBox settings of that auto added in to designer code. 

which creates an error when we run the application.

following line is auto added.

mentionBox1.FocusedItemIndex = -1;


we have to comment every time after doing UI changes. and we need to check every time whether that line is commented or not. 


Please Help Us.



Last Updated: 22 Nov 2021 15:21 by ADMIN
  1. To reproduce use an image with horizontal and/or vertical resolution different from 96.
  2. Open with with RadImageEditor.
  3. Check this.radImageEditor.CurrentBitmap.HorizontalResolution and you will see that it has a value of 96.
Last Updated: 22 Nov 2021 08:58 by ADMIN

Currently, VisualStudio2012DarkTheme has a white background in order to be able to read the labels. This change was done when addressing this item: 

However, it is inconsistent a dark theme to have a white background color. The design should be improved to achieve consistent look and feel.

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