C#

string value=myGrid.Rows[int.Parse(e.CommandArgument.ToString())].Cells[1].Text;

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
    int currentRow = int.Parse(e.RowIndex.ToString());
    int rowint = 0;
    dt.Clear();
    try
    {
        conn.Open();
        string taskstring = dataGridView1[0, currentRow].Value.ToString();
        rowint = int.Parse(taskstring);
        if (dataGridView1.Columns[e.ColumnIndex] == deleteButton && currentRow >= 0)
            //if(dataGridView1.Rows[e.RowIndex].Cells = 1)
        {

            string queryDeleteString = "DELETE FROM tblTasks where TaskCode = " + rowint + "";
            OleDbCommand sqlDelete = new OleDbCommand();
            sqlDelete.CommandText = queryDeleteString;
            sqlDelete.Connection = conn;
            sqlDelete.ExecuteNonQuery();
        }
        else if (dataGridView1.Columns[e.ColumnIndex] == editButton && currentRow >= 0)
        {
            string updatestring = "Select TaskCode, TaskName, TaskDescription FROM tblTasks WHERE TaskCode = " + rowint + "";
            string taskname = dataGridView1[dataGridView1.Columns["TaskName"].Index, currentRow].Value.ToString();
            string description = dataGridView1[dataGridView1.Columns["TaskDescription"].Index, currentRow].Value.ToString();
            OleDbDataAdapter da = new OleDbDataAdapter(updatestring, conn);
            OleDbCommandBuilder cmdb = new OleDbCommandBuilder(da);
            da.Update(dt);
            string update = "UPDATE tblTasks SET TaskName = '" + taskname + "', TaskDescription = '" + description + "' WHERE TaskCode = " + rowint + "";
            da.UpdateCommand = conn.CreateCommand();
            da.UpdateCommand.CommandText = update;
            da.UpdateCommand.ExecuteNonQuery();
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
    finally
    {
        conn.Close();
        getData();

    }
}