Datagrid error when selecting a header

[Sacred18]

First hello to all.
I have the following code in the cellmouse event to get information from a selected row.

private void dt_Grid_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            datagrid.Rows[0][0] = dt_Grid.Rows[e.RowIndex].Cells[0].Value.ToString();
            datagrid.Rows[0][1] = dt_Grid.Rows[e.RowIndex].Cells[1].Value.ToString();
            datagrid.Rows[0][2] = dt_Grid.Rows[e.RowIndex].Cells[2].Value.ToString();
            datagrid.Rows[0][3] = dt_Grid.Rows[e.RowIndex].Cells[3].Value.ToString();
            datagrid.Rows[0][4] = dt_Grid.Rows[e.RowIndex].Cells[4].Value.ToString();
            datagrid.Rows[0][5] = dt_Grid.Rows[e.RowIndex].Cells[5].Value.ToString();
            datagrid.Rows[0][6] = dt_Grid.Rows[e.RowIndex].Cells[6].Value.ToString();
            datagrid.Rows[0][7] = dt_Grid.Rows[e.RowIndex].Cells[7].Value.ToString();
            datagrid.Rows[0][8] = dt_Grid.Rows[e.RowIndex].Cells[8].Value.ToString();
        }

but when i select a collumn, i recive an error because i'm selecting a cell with the mouse and i dont have code for that selection. My question is how can i put an "if" on the beguining of the event so that he can determine if it's a header or not.
Thanks too all in advance.. Any help is welcome.

[Aimee Bailey]

Can I ask how you are populating the DataGridView in the first place? It seems to me that if you are populating the control using a DataTable in the first place, then you could just use the row index to get a DataRow back so you wouldn't have to do this.

Aimee