Question

I have a datagridview with 9 columns. I am simply trying take the value in column 5 and subtract it from column 6, then display the result in column 9. It seems simple enough, I know it’s done in excel all the time. But I just cannot figure this out. Do I need to create a new class with a method called calculate columns? Or does the datagridview class have something already built in that can handle this?

Answer 1

public void dataGridView_Cellformatting(object sender, DataGridViewCellFormattingEventArgs args)
{
    if(args.ColumnIndex == 9) //Might be 8, I don't remember if columns are 0-based or 1-based
    {
        DataGridViewRow row = dataGridView.Rows[e.RowIndex];
        args.Value = (int)row.Cells[6].Value - (int)row.Cells[5].Value;
    }
}

Links: CellFormatting event, DataGridViewcellFormattingEventArgs