change Telerik RadGridView cell color depending on another cell value

[Danilo]

Hello everybody

I'm using Telerik RadGridView. I'm trying to change the color of one cell depending on the value of another cell. I'm trying to achieve this using this code:

if (e.Column.Name == "colDate" && !string.IsNullOrEmpty(e.CellElement.Value.ToString()))
{
    if (DateTime.Now > DateTime.Parse(e.CellElement.Value.ToString()))
    {
        e.Row.Cells["colColor"].Style.DrawFill = true;
        e.Row.Cells["colColor"].Style.BackColor = Color.Red;
        e.Row.Cells["colColor"].Style.NumberOfColors = 1;
    }
}

But for some reason it doesn't change the color. What I noticed is that when i replace

"e.Row.Cells["colColor"].Style"

with

"e.CellElement"

it changes the color. But I don't want to change the color of the current cell. I want it to change the color of another cell.

Any suggestions? :)

[Stefan]

Hi Danilo,

Thank you for writing.

The easiest way to do this is to use the built-in conditional formatting functionality: http://www.telerik.com/help/winforms/gridview-cells-conditional-formatting-cells.html.

Alternatively, if you want to use the CellFormatting event, in it you should format the cell, which the event is triggered for (e.CellElement) and check the other cells for your condition, instead of checking the value of the cell the event is triggered for and styling another cell. Here is how your code should look like:

void radGridView1_CellFormatting(object sender, CellFormattingEventArgs e)
{
    if (e.Column.Name == "colColor"
        && !string.IsNullOrEmpty(e.Row.Cells["colDate"].Value.ToString())
        && DateTime.Now > DateTime.Parse(e.Row.Cells["colDate"].Value.ToString()))
    {
        e.CellElement.DrawFill = true;
        e.CellElement.BackColor = Color.Red;
        e.CellElement.NumberOfColors = 1;
    }
    else
    {
        e.CellElement.ResetValue(LightVisualElement.DrawFillProperty, ValueResetFlags.Local);
        e.CellElement.ResetValue(LightVisualElement.BackColorProperty, ValueResetFlags.Local);
        e.CellElement.ResetValue(LightVisualElement.NumberOfColorsProperty, ValueResetFlags.Local);
    }
}

Note that all introduced settings should be reset accordingly. More information about the formatting events can be found here: http://www.telerik.com/help/winforms/gridview-cells-formatting-cells.html.

I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.

Regards,
Stefan
Telerik

 

 

[Danilo]

Hi Stefan

Thanks for your answer. I didn't even thought about doing it this way... Sounds logical.
Thank you very much. You solved one problem more :)

Regards,
Danilo

[Stefan]

I am glad I could help Danilo. 

Let us know should you have any other questions.

Regards,
Stefan
Telerik