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I have text box and a button in a gridview. The textbox has validation when the button is clicked. However the validation event never gets fired when the button is clicked a second time. 

<asp:GridView ID="ChapterGridView" EnableSortingAndPagingCallbacks="false" AllowSorting="false" AllowPaging="false" runat="server" AutoGenerateColumns="False" CellPadding="2" ForeColor="#333333" GridLines="None" Width="780px" OnRowCommand="ChapterGridView_OnRowCommand" ShowFooter="False" AutoGenerateDeleteButton="true" AutoGenerateEditButton="true" onrowediting="ChapterGridView_RowEditing" onrowdeleting="ChapterGridView_RowDeleting" onrowcancelingedit="ChapterGridView_RowCancelingEdit" onrowupdating="ChapterGridView_RowUpdating" onrowupdated="ChapterGridView_RowUpdated" DataKeyNames="ChapterId" ValidationGroup="ChapterValidation" Visible="true"> <FooterStyle BackColor="#eeeeee" Font-Bold="True" ForeColor="White" /> <Columns> <asp:TemplateField HeaderText="*End Page" HeaderStyle-HorizontalAlign="Left"> <ItemTemplate><%# Eval("EndPage")%></ItemTemplate> <EditItemTemplate> <asp:TextBox ID="EndPage" runat="Server" Text='<%# Eval("EndPage") %>'></asp:TextBox> <asp:CustomValidator ID="TotalPagesValidator" ValidationGroup="ChapterValidation" OnServerValidate="TotalPages_ServerValidate" EnableClientScript="false" ErrorMessage="Number of pages in chapter are greater than number of pages in entire publication." Display="None" ControlToValidate="EndPage" runat="server" /> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="EndPage" runat="Server"></asp:TextBox> <asp:CustomValidator ID="TotalPagesValidator2" ValidationGroup="ChapterValidation" OnServerValidate="TotalPages_ServerValidate" EnableClientScript="false" ErrorMessage="Number of pages in chapter are greater than number of pages in entire publication." Display="None" ControlToValidate="EndPage" runat="server" /> <asp:Button ID="btnInsert" runat="Server" Text="Insert" CommandName="Insert" UseSubmitBehavior="false" ValidationGroup="ChapterValidation" /></span> </FooterTemplate> </asp:TemplateField> </Columns> </asp:GridView>

The same validation for edit works as expected. But not for the Insert button. Any suggestions?

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2 Answers 2

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1: Did you set the breakpoint to make sure there is a postback? Is the serverside validation called at all or not?

2: Can you try changing the ValidationGroup for Insert to something else than the Edit.

Edit There are issues using ValidatorCallOut with CustomValidator with ServerSide Validation.

http://forums.asp.net/t/1054676.aspx

http://programminginhell.wordpress.com/2008/08/03/hello-world/

Here's another way showing error in a jquery dialog: http://weblogs.asp.net/gurusarkar/archive/2011/03/28/part-3-showing-asp-net-server-side-messages-in-a-custom-dialog-server-side-with-asp-net-ajax.aspx

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Yes there is a postback. Validation is not called.
And yes I tried changing the ValidationGroup but it did not work.
I noticed you have Display="None" for validatorcontrol. Are you using ValidatorCallout? If not shouldn't you be setting Display="Dynamic" or "Static".
Yes I am using a validator callout.
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@TrekStir - thanks for pointing me in the right direction.

The problem was that there was code to make the footer invisible after a row was added. For some reason that was causing the validation code not to fire. I figured out a way to implement the functionality without setting the footer to invisible and this solved the problem.

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