Last Updated: 17 Sep 2019 08:46 by ADMIN
Created by: Jared
Comments: 1
Category: UI for WinForms
Type: Feature Request



It would be cool if we had a Material Dark Theme,

More and more we see clients requesting this from our apps since Google has popularized the trend now.



Last Updated: 10 Sep 2019 05:20 by ADMIN
Last Updated: 27 Aug 2019 12:15 by ADMIN
Release R3 2019

 The scroll in the SuggestedActionsElement cannot be made visible, one can scroll only with the mouse. Introduce a property so there is an indication that additional items are available.

In addition, the CreateChatElement in RadChat class should be made virtual. 

Last Updated: 19 Aug 2019 05:00 by ADMIN
Changing the preferred width of columns to percentages from the Table Properties dialog actually sets them in pixels.

Steps to reproduce:
1) Insert a table

2) select table column property and set preferred width to 20%

3) press "next column" button and set preferred width to 20% 

4) Go to previous columns 

Expected: Column width is set in percentage.

Actual: Some (or all) columns have width set in pixels.
Last Updated: 26 Jul 2019 12:51 by ADMIN
Created by: Dess | Tech Support Engineer, Sr.
Comments: 3
Category: UI for WinForms
Type: Feature Request

Last Updated: 25 Jul 2019 14:47 by ADMIN
Release R3 2019 (LIB 2019.2.729)

When creating a composite filter descriptor with a value that contains an array of enums, it generates an expression with IN, and an exception is thrown when adding it to the FilterDescriptors on a RadGridView control.


Exception Message:

{"The expression contains undefined function call In()."}


The expression value is: ([RandomPropertyName] IN (1,3,9) OR [RandomPropertyName] = 10)


We have recently upgraded from 2015.2.728.40 (where this worked) to the Feb. 2019 version, then today upgraded to the May 2019 version. The issue remains.


The project includes the following Telerik references:













Last Updated: 25 Jul 2019 12:30 by ADMIN

You can use the following code snippet and follow the steps from the provided gif file:

        public RadForm1()

            DataTable dt = new DataTable();
            for (int i = 0; i < 100; i++)

            this.radMultiColumnComboBox1.DisplayMember = "Id";
            this.radMultiColumnComboBox1.ValueMember = "Id";
            this.radMultiColumnComboBox1.DataSource = dt;
            this.radMultiColumnComboBox1.SelectedIndex = -1;

            this.radMultiColumnComboBox1.SelectedIndexChanged += radMultiColumnComboBox1_SelectedIndexChanged;

        private void radMultiColumnComboBox1_SelectedIndexChanged(object sender, EventArgs e)
            RadMessageBox.Show("You just selected index " + this.radMultiColumnComboBox1.SelectedIndex);

Last Updated: 22 Jul 2019 14:50 by ADMIN
Release R3 2019 (LIB 2019.2.729)


private void RadDropDownButton1_DropDownOpening(object sender, EventArgs e)
    var args = e as RadPopupOpeningEventArgs;
    var popupSize = radDropDownButton1.DropDownButtonElement.DropDownMenu.Size;
    var x = args.CustomLocation.X - (popupSize.Width - radDropDownButton1.Width);
    args.CustomLocation = new Point(x, args.CustomLocation.Y);

Last Updated: 02 Jul 2019 15:28 by ADMIN
Release R3 2019 (LIB 2019.2.708)

Use attached to reproduce.

- In the excel-like filter popup unselect 0.1, 0.2, and 0.3 and then click "Fork"

- When the layout is loaded the values are changed to 1, 2, and 3. 


Change the culture before saving/loading the layout. 

Under Review
Last Updated: 19 Jun 2019 14:58 by ADMIN

Hello Guys,


Good Evening , As per your suggestions i make my custom treeview node with LiteVisualElements .

In That Node i have taken one StackLayoutElement and RoundRectShape assigned to it but still panel shows corners instead of round edges,

i tried with different properties and styles but not get succeed , so please help me out.

here i have attached image of my node and "stackLayoutElement" code too.

spnlControls = new StackLayoutElement();
            spnlControls.Orientation = Orientation.Horizontal;
            spnlControls.NotifyParentOnMouseInput = true;
            spnlControls.DrawFill = true;
            spnlControls.DrawBorder = true;
            spnlControls.Shape = new RoundRectShape(4);
            spnlControls.BackColor = Color.Transparent;
            spnlControls.BackColor2 = Color.Transparent;
            spnlControls.BackColor3 = Color.Transparent;
            spnlControls.BackColor4 = Color.Transparent;
            spnlControls.BorderGradientStyle = GradientStyles.Solid;
Last Updated: 14 Jun 2019 06:47 by ADMIN

To reproduce:

- Open The popup

- Click on it, and then click on the form

- Repeat until the popup stays opened

Last Updated: 07 Jun 2019 11:48 by ADMIN
Created by: Hemesh
Comments: 1
Category: UI for WinForms
Type: Bug Report


I have already used your ItemFormatting event in my code and implemented it the same way you have provided.

In my code, i have created 7-8 messages and fixed the first msg's timestamp to "6/6/2019 11:53:08 AM" and the remaining messages with timestamp of 2 minutes more than this time. Whenever the event is triggered i wrote a code which compares the timestamp of my message with this timestamp "6/6/2019 11:53:08 AM". Conditionally only the first message falls in this condition and i paint it red, which works well for first time (On load) and then when i scroll my chat, the event unnecessarily paints the remaining msgs too, which should not happen.

I am attaching my .cs file with designer please refer to it, and resolve this asap. Looking forward to your response.


Last Updated: 07 Jun 2019 11:32 by ADMIN
Created by: BERND
Comments: 0
Category: UI for WinForms
Type: Bug Report

To reproduce: 

radCheckBox1.Font = new Font("Segoe UI", 20, FontStyle.Regular);

radCheckBox2.ThemeName = "Fluent";
radCheckBox2.Font = new Font("Segoe UI", 20, FontStyle.Regular);


radCheckBox2.ButtonElement.Font = new Font("Segoe UI", 20, FontStyle.Regular);


Last Updated: 06 Jun 2019 13:47 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.610)
Bind the grid to an enumeration, save/load the layout. 
Under Review
Last Updated: 05 Jun 2019 12:32 by ADMIN

Hi All,

Note:- I am using Bound RadTreeview. Bound with DataSource.

1 Take RadTreeview

2 Add Few nodes Like:

    ......Node A

    ......Node B

    ......Node C

    ............Node D

    ............Node E

3 Now Drag Node B and Drop it in Node C (As Node C's Child)

4 It throw Exception Error Msg  "Collection was modified; enumeration operation may not execute."

5  Now Try to Drag Node E and Drop it in Node B, again same error occurs

6 Full error screen i attached here.

Please reply as soon as possible.


Last Updated: 29 May 2019 10:16 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.603)
The bug can be reproduced like this:

- Launch the "Demo Application - Telerik UI for WinForms R1 2019 SP1" provided with the control suite.

- Choose "Explore all controls", "List control", "Settings"

- In the "Settings panel", set "Selection Mode" to "MultiSimple"

- In the "Themes" panel, choose "Office2013Light"

- click on the second item, then the third, then the fourth to select --> OK

- click on the second item to unselect it --> Not OK, the list isn't refreshed accordingly

- click on the third item to unselect it --> Not OK, the second item is properly unselected but the third one is still selected
Last Updated: 28 May 2019 16:00 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.527)

Steps to reproduce:

1) Add a RadForm with 3 buttons. Apply Fluent Theme to all.

2) In the click handler of the first two buttons, set enable to false for the button that was clicked. Third button, do nothing.

3) Run app. Click all 3 buttons.


Desired Result:

Focus indicator should be hidden for previous-focused but now-disabled controls.


Actual Result:

Blue Fluent focus-indicator border is still showing (my user's are confused and complaining), see attachment.

[May happen on other themes too, didn't check.]


Had to implement a work-around...


Work around: 

Set border element to off for every programmatically disabled control: this.radButton1.ButtonElement.BorderElement.Visibility = ElementVisibility.Hidden;

Last Updated: 28 May 2019 15:59 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.603)
Please refer to the attached sample project and follow the steps illustrated in the gif file.
Last Updated: 28 May 2019 10:17 by ADMIN
Created by: Doftech
Comments: 5
Category: UI for WinForms
Type: Bug Report
When developing a third party (PPM Hexagon Smart Sketch), focus on the grid and key-in. When using the winform basic control, there is no problem but when you create it with RadGridView, the application will be stopped by key-in.
Last Updated: 24 May 2019 08:29 by ADMIN
Created by: n/a
Comments: 6
Category: UI for WinForms
Type: Feature Request
The new series will be similar to the RadarColumnSeries which is already available.
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