private void btnEdit_Click(object sender, EventArgs e)
        {
            if (dgvUser.SelectedRows.Count > 0)
            {
                int rowIndex = dgvUser.CurrentCell.RowIndex;

                uUser.user_id          = Convert.ToInt32(dgvUser.Rows[rowIndex].Cells[dalUser.UserID].Value);
                uUser.user_name        = dgvUser.Rows[rowIndex].Cells[dalUser.Username].Value.ToString();
                uUser.user_password    = dalUser.getPassword(uUser.user_id);
                uUser.user_permissions = Convert.ToInt32(dgvUser.Rows[rowIndex].Cells[dalUser.Permission].Value);

                frmUserEdit frm = new frmUserEdit(uUser);
                frm.StartPosition = FormStartPosition.CenterScreen;
                frm.ShowDialog();//Item Edit

                LoadUserList(dgvUser);
                dgvUser.ClearSelection();
            }
            else
            {
                MessageBox.Show("Please select a user.");
            }
        }