Header cell image gets reset on mouse over

[Peter Luth]

Hello,

I am using the RowFormatting event to set an image to the GridRowHeaderCellElement. This is working. However when a user hovers the mouse over the header cell, the image gets removed, and it will only get reset if he clicks a row again.

Here is the code I use for RowFormatting:

void RowFormatting_ImageChanging(object sender, Telerik.WinControls.UI.RowFormattingEventArgs e)
        {
            GridRowHeaderCellElement grhce = e.RowElement.Children[0] as GridRowHeaderCellElement;

            if (grhce != null)
            {
                GridViewEditableEntry aa = e.RowElement.RowInfo.DataBoundItem as GridViewEditableEntry;
                if (aa != null)
                {
                    if (aa.Changed)
                        grhce.Image = myimage1;
                    else if (aa.IsEditable)
                        grhce.Image = myimage2;
                    else if (!aa.IsEditable)
                        grhce.Image = myimage3;
                }
                else
                {
                    grhce.Image = null;
                }
            }
        }

How can I prevent the header cell image to get reset?

[Jack]

Hi Martin,

You can do this by using custom row header cells. You should process the CreateCell event. Please consider the code snippet below:

void radGridView1_CreateCell(object sender, GridViewCreateCellEventArgs e)
{
    if (e.CellType == typeof(GridRowHeaderCellElement))
    {
        e.CellElement = new MyHeaderCell(e.Column, e.Row);
    }
}

public class MyHeaderCell : GridRowHeaderCellElement
{
    public MyHeaderCell(GridViewColumn column, GridRowElement row)
        : base(column, row)
    {
    }

    public override void UpdateInfo()
    {
        base.UpdateInfo();
        this.Image = Resources.blue;
    }
}

I hope this helps. Do not hesitate to write us back if you have questions.

Regards,
Jack
the Telerik team

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[Peter Luth]

Thanks. Works like a charm!