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Datagridview cell with background image

Posted on 2014-03-22
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Last Modified: 2014-04-09
I have created a DataGridView, one of the cells (DataGridViewTextBoxCell) I would like to have a background image. To do this I have used the following on the CellPainting event.

private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        var image = Resources.item_qty_white;
        e.PaintBackground(e.ClipBounds, false);

        e.Graphics.DrawImageUnscaled(image, 1410, e.CellBounds.Top);
    }

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This works well and the image is on ever row in the position I want. However, the cell it is sitting in has a DataGridViewTextBoxCell with a numeric value. The image floats on top of this value and thus is hidden. I guess the ideal solution would be to make the DataGridViewTextBoxCell be "TopMost" but I couldn't figure out how to do this.

I then decided to try and make the background image partial transparent so the value underneath would be visual, so I changed my CellPainting code to below.
private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        var image = Resources.item_qty_white;

        e.PaintBackground(e.ClipBounds, false);
        image.MakeTransparent(Color.White);
        e.Graphics.DrawImageUnscaled(image, 1410, e.CellBounds.Top);
    }

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This again worked and I could see the value with the background image surrounding it as I would like. However the next issue arise when I tried to update the value of the cell. Once I did that the previous value was visible and the new value that I was trying to set was overlapping it. I am now stuck.

Any advice/guidance would be very appreciated.
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Question by:Diginari
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3 Comments
 
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Expert Comment

by:Uchihaitachi
ID: 39968586
So, the problem happens when you update the value of the cell... that's quite odd, I can't get any idea. Maybe you could change to some other C# gridview control, to know something about their gridview cells may give you some insights.
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Accepted Solution

by:
Diginari earned 0 total points
ID: 39978760
This was fixed by adding

if (!e.Handled)
        {
            e.Handled = true;
            e.PaintContent(e.CellBounds);
        }   

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Author Closing Comment

by:Diginari
ID: 39988231
Own issue resolved
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