Hi,
I'm having exactly the same problem: validators on client side does not seem to work correctly. I have some data inside RadAjaxPanel, there are two labels, that should display some string value, and there is one hidden field, that holds information, whether element in first field was selected.
<telerik:RadAjaxPanel ID="DetailsSection" runat="server" LoadingPanelID="loadingPanel">
<div class="DetailBox>
<div class="DetailHeader">
<div class="DetailHeaderTitle">
Details
</div>
</div>
<div class="DetailContent">
<ul>
<li>
<div class="DetailLabel">
*Name:
</div>
<div class="DetailText">
<div class="BreakWordDiv">
<asp:Label ID="lblName" runat="server">
<%# GetTextValue(Me.Name)%>
</asp:Label>
<asp:TextBox ID="hdnName" runat="server" Style="display: none" />
<asp:RequiredFieldValidator ID="rfvName" runat="server" ControlToValidate="hdnName"
SetFocusOnError="false" ErrorMessage="Name is required before saving"
ValidationGroup="SaveValidationGroup">
*
</asp:RequiredFieldValidator>
</div>
</div>
<div class="DetailTextInfo">
<asp:LinkButton Text="Select" ID="linkName" runat="server" OnClientClick="ShowNameSelect(); return false;" />
</div>
</li>
<li>
<div class="DetailLabel">
*Second label:
</div>
<div class="DetailText">
<div class="BreakWordDiv">
<asp:Label ID="lblSecond" runat="server">
<%# GetTextValue(Me.SecondValue)%>
</asp:Label>
</div>
</div>
<div class="DetailTextInfo">
<asp:LinkButton Text="Select" ID="linkSecond" runat="server" OnClientClick="ShowSelect(); return false;" />
</div>
</li>
</ul>
</div>
</div>
</telerik:RadAjaxPanel>
Now, when I first go to that page and press save button, that causes validation (this button is outside RadAjaxPanel) everything works fine, red asterisk is displayed as there was no name value selected. If I select name, everything works fine. But if I would go to that page, then select value for second field (which has no validators) and then pressed Save button, client side validation does not give me an error message, instead postback is triggered and then server side validation returns an error, that name field was empty.
So: client side validation seems broken after I select second value (which causes RadAjaxManager to create ajax postback for presented panel), but server side validation still seems to work OK.
Any idea why client side validation is not working? Is there any way to fix this behavior? Any workaround?
Thanks in advance,
Pako