private void btnSearch_Click(object sender, EventArgs e) { if (string.IsNullOrWhiteSpace(txtSearch.Text) == true) { MessageBox.Show("Please enter the Customer ID or Name to search!", "SEARCH", MessageBoxButtons.OK, MessageBoxIcon.Information); txtSearch.Focus(); } else { dgvCustomer.DataSource = bus_cus.Search(txtSearch.Text, txtSearch.Text); ResetValues(); } }