Question

I’m trying to strike out entire row in Datagridview. This is what I’m doing currently:

 DataGridViewCellStyle style = new DataGridViewCellStyle();
 style.Font = new Font(dgview.Font.OriginalFontName, 7, FontStyle.Strikeout);              
 dgview.Rows[dgview.RowCount - 1].DefaultCellStyle.ApplyStyle(style);

This approach only strikes out the part of cells that have any text in them. What I’d like is to have a continuous strikeout i.e a single line that runs across the row.

I’d appreciate any help on this. Thanks in advance.

EDIT: Saw this as probable answer in another question- “Probably the easiest way to do this, if all the rows are the same height, is to apply a background image to it that just has a big line through the center, the same color as the test.”

If everything else fails then I’d go with this. But isn’t there anything more simple?

EDIT2: Implemented Mark’s suggestion with a bit of tweaking. The cellbound property wasn’t working properly for me so I decided to get the location by using the rowindex and rowheight.

  private void dgv_CellPainting(object sender,DataGridViewCellPaintingEventArgs e)
    {
        if (e.RowIndex != -1)
        {
            if (dgv.Rows[e.RowIndex].Cells["Strikeout"].Value.ToString() == "Y")
            {
                e.Paint(e.CellBounds, e.PaintParts);
                e.Graphics.DrawLine(new Pen(Color.Red, 2), new Point(e.CellBounds.Left, gridHeaderHeight+ e.RowIndex * rowHeight+ rowHeight/2), 
                    new Point(e.CellBounds.Right, gridHeaderHeight+ e.RowIndex * rowHeight+ rowHeight/2));
                e.Handled = true;
            }
        }
    }

Answer 1

If you create an event handler for datagridview_CellPainting, then DataGridViewCellPaintingEventArgs e has everything you need.

For example, you can find out the row/column of the cell currently being painted (e.RowIndex, e.ColumnIndex).

So you can use this to determine if the current cell is the one you want to modify. If it is, you can try the following:

e.Paint(e.CellBounds, e.PaintParts);  // This will paint the cell for you
e.Graphics.DrawLine(new Pen(Color.Blue, 5), new Point(e.CellBounds.Left, e.CellBounds.Top), new Point(e.CellBounds.Right, e.CellBounds.Bottom));
e.Handled = true;

This will draw a thick blue diagonal line, but you get the idea… e.CellBounds also has Height/Width so you can easily calculate the middle to draw your line.

You can also change things like e.CellStyle.BackColor if you want more than just a line.