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

Code:
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]
...