Hi guys,
am having trouble with this error code while trying to insert certain values to the database. Can somebody help?

Code:
if (e.ColumnIndex == 4)
                {

                    try{
                    
                string id = dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString();
                string item = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
...