Question

How can I add onClick action to the left column which has a triangle and is a column added by default.
I found out how to hide it using "RowHeadersVisible=false" but I don’t want to hide it I just want the onClick of that column to perform the same action as if you click on a different column in that same row.

Answer 1

I got it, it’s the action

private void datagrid1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
   if(e.ColumnIndex == -1)
    {
    }
}