private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex==4)
            {
                string str = "server=localhost;database=ts_sell;uid=sa;pwd="; string cid = "DD" + DateTime.Now.ToString("yyyyMMddhhmm");
            SqlConnection scon = new SqlConnection(str); 
            scon.Open();
            string sql = "insert into t_dingdan values ('" +cid  + "','" + dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString() + "','" + dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString() + "','" + dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString() + "','" + dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString() + "','" + user + "')";
            SqlCommand scom = new SqlCommand(sql, scon);
            scom.ExecuteNonQuery();
            MessageBox.Show("保存成功");
            scon.Close();
            }
        }