Conditional required field validation in an ASP.net ListView
- by Jim Dagg
I'm having a heck of a time trying to figure out how to implement validation in a ListView. The goal is to require the user to enter text in the comments TextBox, but only if the CheckBox is checked. Downside is that these controls are in the EditTemplate of a ListView. Below is a snippet of the relevant code portion of the EditTemplate:
<tr style="background-color: #00CCCC; color: #000000">
<td>
Assume Risk?
<asp:CheckBox ID="chkWaive" runat="server" Checked='<%# Bind("Waive") %>' />
</td>
<td colspan="5">
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Comments required" ControlToValidate="txtComments" />
<asp:TextBox Width="95%" ID="txtComments" runat="server" Text='<%# Eval("Comment") %>'></asp:TextBox>
</td>
<td>
<asp:Button ID="btnSave" runat="server" Text="Save" CommandName="Update" Width="100px" />
</td>
</tr>
Is there a way to do conditional validation using this method? If not, is there a way I could validate manually in the ItemUpdating event of the Listview, or somewhere else, and on a failure, alert the user of the error via a label or popup alert?
