Last Updated: 04 Oct 2019 10:04 by ADMIN
Created on: 02 Oct 2019 21:01
Category: GridView
Type: Bug Report
RadGridView: Multi Select with High Contrast Theme is not indicated properly

I am currently working in Telerik v2019.3.917 and .Net 4.5.2. I have multiple theme's setup for a local application for my users but I am seeing something odd with the Telerik.WinControls.Themes.HighContrastBlack theme. It appears that I am unable to select more than one cell in this theme. My grid has multiselect as true and SelectionMode as CellSelect. I have tried holding ctrl and clicking cells, clicking the row header, holding the mouse down and dragging, and using Ctrl+A but none of these select more than one cell.

I am setting the application theme on launch:

var _t = new Telerik.WinControls.Themes.HighContrastBlackTheme();
ThemeResolutionService.ApplicationThemeName = "HighContrastBlack";


Themes that work: All Fluents, All Material, All VS.

Is this a bug or am I missing something?

1 comment
Dess | Tech Support Engineer, Sr.
Posted on: 04 Oct 2019 10:04

Hello, Jesse,    

The described behavior really sounds odd. Following the provided information, I have prepared a sample project to test the scenario. Indeed, the HighContrastBlack doesn't have style for the selected state of the cells.

I have logged it in our feedback portal by making this thread public. You can track its progress, subscribe for status changes and add your comments on the following link - feedback item.


I have also updated your Telerik points.

Currently, the possible solution that I can suggest is to use the CellFormatting event and indicate the selected cells with e specific color: 

        private void radGridView1_CellFormatting(object sender, CellFormattingEventArgs e)
            if (e.CellElement.IsSelected)
                e.CellElement.DrawFill = true;
                e.CellElement.GradientStyle = GradientStyles.Solid;
                e.CellElement.BackColor = Color.Green;
                e.CellElement.GradientStyle = GradientStyles.Solid;
                e.CellElement.ResetValue(LightVisualElement.DrawFillProperty, ValueResetFlags.Local);
                e.CellElement.ResetValue(LightVisualElement.GradientStyleProperty, ValueResetFlags.Local);
                e.CellElement.ResetValue(LightVisualElement.BackColorProperty, ValueResetFlags.Local);
                e.CellElement.ResetValue(LightVisualElement.GradientStyleProperty, ValueResetFlags.Local);


I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Dess | Tech Support Engineer, Sr.
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