protected void saveButton_Click(object sender, EventArgs e) { if (asisNameTextBox.Text == "" || asisTypeDropDownList.SelectedItem.Text == "" || asisCntctTextBox.Text == "") { msgLabel.Text = "please enter the value"; } else { aAssistant.AssistantId = RandomGenerateId(0, 99999).ToString(); aAssistant.AsstName = asisNameTextBox.Text; aAssistant.ContactNo = asisCntctTextBox.Text; aAssistant.AsstType = asisTypeDropDownList.SelectedItem.Text; msgLabel.Text = aManager.Save(aAssistant); assistantGridView.Visible = true; PopulateGridView(); ClearTextBox(); } }