I have the following textbox with validation:
<asp:TextBox ID="txtInput" runat="server" Width="80px"
CausesValidation="True"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredValidator" runat="server"
ControlToValidate="txtInput"
Display="None"
ErrorMessage="Bitte füllen Sie dieses Feld aus"
Enabled="false" />
<asp:RegularExpressionValidator ID="RegularExpressionValidator" runat="server"
ControlToValidate="txtInput"
ValidationExpression="[0-9]{1}(\d)*"
Display="None"
ErrorMessage="Bitte geben Sie eine Zahl ein"
Enabled="false" />
<asp:ValidatorCalloutExtender ID="ValidatorCalloutExtender1" runat="server"
TargetControlID="RequiredValidator" />
<asp:ValidatorCalloutExtender ID="ValidatorCalloutExtender2" runat="server"
TargetControlID="RegularExpressionValidator" />
If I click on a button on this page (CausesValidation is set to true) then the control validates properly. But when I put the textbox and its associated validators and extenders not directly on the page, but instead into a usercontrol then the validation-popup doesn't show anymore. It still seems to validate, because the action for the button is not triggered when the input is invalid.