Validation summary control not showin message?
<p>I have a page with TextBox to enter a Mobile Number.
For that I have validated it using RequiredFieldValidator and RegularExpressionValidator
with display=none:</p>

<p>And also I have placed a ValidationSummary Control </p>

<pre><code>&lt;asp:ValidationSummary ValidationGroup="mobile" ShowSummary="false" ID="vsValid"
    runat="server" ShowMessageBox="true" Enabled="true" 
    DisplayMode="SingleParagraph" /&gt;
&lt;asp:TextBox ID="txtMobileNumber" runat="server" CssClass="Qinputbox"&gt;&lt;/asp:TextBox&gt;
&lt;asp:RequiredFieldValidator Display="None" ControlToValidate="txtMobileNumber" 
    ID="reqValidMobileNo" runat="server" ErrorMessage="*" 
    ValidationGroup="mobile"&gt;&lt;/asp:RequiredFieldValidator&gt;
&lt;asp:RegularExpressionValidator ControlToValidate="txtMobileNumber" Display="None"
    ID="regExValidMobileNo" runat="server" 
    ErrorMessage="Please enter a valid mobile number."
    ValidationExpression="^((\+){0,1}91(\s){0,1}(\-){0,1}(\s){0,1}){0,1}9[0-9]
        (\s){0,1}(\-){0,1}(\s){0,1}[1-9]{1}[0-9]{7}$"
    ValidationGroup="mobile"&gt;&lt;/asp:RegularExpressionValidator&gt;
</code></pre>

<p>when I entered characters in the TextBox it is not showing the summary.
What might be the problem?</p>

<p>Thanks in advance</p>
