The ASP.Net ListView control is a godsend for developers. Drop the control on the form, hook in a datasource, and you have complete, out-of-the-box view, edit, insert, and delete functionality. One thing missing though is a delete confirmation if the user clicks the delete button. The Delete button is right next to the Edit button so it’s fairly easy to mistakenly click it and with an accidental click, the record is permanently deleted with no prompt or warning issued to the user.
Adding a delete confirmation prompt is very simple to do. Using the JavaScript confirm() function, we can add one line to the control definition and implement the delete confirmation dialog box. Simply add a OnClientClick() call to the button control(s) in the ListView definitions (see the bold text in the example below).
<asp:Button ID=”DeleteButton” runat=”server” CommandName=”Delete” Text=”Delete” OnClientClick=”return confirm(‘Are you certain you want to delete?’);”/>
The result will be the pop of a delete confirmation dialog box as seen in the screenshot below. Clicking the delete button pops the dialog. If the user clicks the Cancel button then the dialog closes and no action is taken on the record. Conversely, if the OK button is clicked then the dialog closes and the record deletion continues.
