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2 answers
57 views

Hello,
I’m working with a RadPageView in Strip view mode and I need to color each tab (page) individually. The coloring works, but I’m facing two issues:

1. Selected tab color – I want to change the tab’s color when it becomes selected. I tried handling this in SelectedPageChanging, but I’m unable to restore the previous color correctly.

2. Font color – I need to adjust the text color based on the tab’s background (white text for dark tabs, black text for light tabs).

Is this possible to achieve?
Thank you for your help.

Radek

Radek
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Iron
Iron
 answered on 27 Apr 2026
1 answer
95 views

Hello,
I’m developing an OOABL application using the Telerik GridView component.
How can I add an image to the top-left corner of the grid header?
And how can I add a context menu when the image is clicked?
Thank you for your feedback.

 

 

Nadya | Tech Support Engineer
Telerik team
 answered on 16 Apr 2026
1 answer
177 views

I'm using the...

AllowRowReorder = True

...setting in a grid and simply need to know if the user drags and drops a row within the same grid. What event do I need to catch to deal with this please....?

Dinko | Tech Support Engineer
Telerik team
 answered on 16 Apr 2026
1 answer
62 views

Hello,

I am using the Dock component.

I have added 3 “documentWindows”.

In each “documentWindows”:

- 1 grid

- buttons: save, cancel, create, edit and delete

- fields

I would like to disable the other “documentWindows” when I enter create, edit or delete mode.

And to re-enable them when I save or cancel.

E.g.: If I am in “documentWindows1” and click the “edit” button, then “documentWindows2 and 3” are disabled.

If I confirm or cancel, then “documentWindows2 and 3” are enabled.

Thank you for your feedback.

Translated with DeepL.com (free version)

Nadya | Tech Support Engineer
Telerik team
 answered on 15 Apr 2026
1 answer
55 views

If I have to dynamically add data to the Treemap, I'm usually clearing the items at the start of this process. Then, when I add new items in the tree map remains totally clear on the 2nd time data is loaded. The first time is fine.

I've been looking for a Refresh method but this does not assist at all.

My current codes goes something like...

With Me.treList
    .Items.Clear()

    If rec.RecordCount > 0 Then
        Do Until rec.EOF
            .Items.Add(rec("Department").ToString, CDbl(rec("TotalDepartmentStock")))
            rec.movenext
        Loop
    End If

    .Refresh()
End With

Thank you in advance.

Simon

Simon
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Iron
 answered on 15 Apr 2026
1 answer
101 views

Hello everyone,
I'm encountering the following issues when using RadDock 2025 Q2. Any solutions?
1. When the main form changes, the layout doesn't auto-refresh, leaving blank space or causing docking windows to be overlapped.
2. When closing windows, the layout doesn't auto-refresh, leaving blank areas.
3. Splitter bars sometimes cannot be dragged.
4. All windows inherit from DocumentWindow (or ToolWindow) and implement IRequireServices. Window creation and construction use DI injection.

The management code used and the demo GIF are attached in the package.

 

Dinko | Tech Support Engineer
Telerik team
 answered on 14 Apr 2026
2 answers
308 views

I have 2 grids with drag and drop capability, one of them is just a simple grid with 2 columns, the other grid is a grid with 3 Hierarchical Templates that have 3 associated BindingSources.

How can I, when dragging and dropping from the simple grid to the hierarchical grid, determine which Template I am dragging the row to and add it to that Template/BindingSources?

I used exactly the example code you have here (https://docs.telerik.com/devtools/winforms/controls/gridview/rows/drag-and-drop), and indeed everything works.

I just wanted to understand if it's possible to know which Template the row is being dragged to and add it exactly to that Template.

F3M
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Iron
Iron
 answered on 13 Apr 2026
1 answer
62 views

Hi,

I have a requirement to show a column congtaining waiting bar dot rings in a grid view.

I have the currentcode which defines the custom cell and also the custom column

//////////////////////////////////////
// custom cell
//////////////////////////////////////

public class WaitingDotsRingCellElement : GridDataCellElement
{
    private RadWaitingBarElement waitingElement;
    private DotsRingWaitingBarIndicatorElement ringElement;


    public WaitingDotsRingCellElement ( GridViewColumn column, GridRowElement row )
        : base ( column, row )
    {
    }


    protected override void CreateChildElements ( )
    {
        base.CreateChildElements ();

        ringElement = new DotsRingWaitingBarIndicatorElement ();

        ringElement.DotRadius = 4;
        ringElement.LastDotRadius = 1;
        ringElement.Radius = 10;
        ringElement.ElementCount = 8;
        ringElement.NumberOfColors = 4;
        ringElement.ElementColor = Color.Red;

        waitingElement = new RadWaitingBarElement ();
        waitingElement.WaitingIndicators.Clear ();
        waitingElement.WaitingSpeed = 40;
        waitingElement.WaitingStyle = WaitingBarStyles.DotsRing;
        waitingElement.WaitingIndicators.Add (ringElement );

        Children.Add ( waitingElement );
    }


    protected override void SetContentCore ( object value )
    {
        if ( Value != null && Value != DBNull.Value )
        {
            if ( Convert.ToInt32 ( Value ) == 0 )
            {
                waitingElement.StopWaiting ();
            }
            else if ( Convert.ToInt32 ( Value ) == 1 )
            {
                waitingElement.StartWaiting ();
            }

        }
    }


    public override bool IsCompatible ( GridViewColumn data, object context )
    {
        return data is WaitingDotsRingColumn && context is GridDataRowElement;
    }


    protected override Type ThemeEffectiveType
    {
        get
        {
            // Ensures the cell inherits grid cell styling
            return typeof ( GridDataCellElement );
        }
    }
} // WaitingDotsRingCellElement


//////////////////////////////////////
// custom column
//////////////////////////////////////


public class WaitingDotsRingColumn : GridViewDataColumn
{
    public WaitingDotsRingColumn(string fileName ) : base(fileName)
    {
    }


    public override Type GetCellType ( GridViewRowInfo row )
    {
        if ( row is GridViewDataRowInfo )
        {
            return typeof ( WaitingDotsRingCellElement );
        }
        return base.GetCellType ( row );
    }
} // WaitingDotsRingColumn

My issue is that the properties "radius" and "element count" are not being set correctly, however other properties such as element color are being set correctly.

My grid view row height is being set to 32 via gridView.TableElement.RowHeight

In addition, how do i get rid of the "button" effect appearing in the cell background?

Kind regards
Toby

 
Nadya | Tech Support Engineer
Telerik team
 answered on 13 Apr 2026
1 answer
48 views

I have a hierarchical menu of RadMenuItems

Item

   SubItem

       SubSubItem

If I select SubSubItem, is there any way via recursion I could iterate back up the tree to the top Item menu?

I saw a post from 2013 that suggested storing references to the preceding menu item in the Tag property but I'm wondering if there is a better way now to do this?

Thanks

Carl

 

Nadya | Tech Support Engineer
Telerik team
 answered on 03 Apr 2026
1 answer
68 views

1. if i set  MultiSelect = false;     

   after user click

   how can i get current row and it's data

 2. if i set  MultiSelect = true;     

   after user select many rows 

   how can i get these rows and it's data

Nadya | Tech Support Engineer
Telerik team
 answered on 30 Mar 2026
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