private void btnAddSType_Click(object sender, EventArgs e) { if (!System.Text.RegularExpressions.Regex.IsMatch(txtRate.Text, @"^[0-9]+$")) { MessageBox.Show("Invalid Data inserted for rate number"); return; } lblSTypeID.Text = null; DataRow newSTypeRow = DM.dtServiceType.NewRow(); if (txtDescription.Text == "") { MessageBox.Show("You must type in a Service Description ", "Error"); } else { newSTypeRow["Description"] = txtDescription.Text; newSTypeRow["HourlyRate"] = txtRate.Text; DM.dtServiceType.Rows.Add(newSTypeRow); DM.UpdatedServiceType(); MessageBox.Show("Service Type added successfully", "Success"); } return; }