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  1. PO
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    <p>Try using a ValidationGroup property across all your validators and the ValidationSummary.</p> <p><strong>EDIT:</strong> Another possibility could be the Server Validation Code</p> <pre><code>args.IsValid = (!CampaignRegistration.IsMemberRegistered(args.Value)); </code></pre> <p>if <code>CampaignRegistration.IsMemberRegistered(args.Value)</code> is returning false, "!" is making it true and therefore making it valid. I think you should get rid of the "!" as follows:</p> <pre><code>args.IsValid = CampaignRegistration.IsMemberRegistered(args.Value); </code></pre> <p><strong>UPDATE:</strong> In order for the ValidationSummary to display your custom validator message in a messagebox, you need to have <a href="http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.customvalidator.clientvalidationfunction.aspx" rel="noreferrer">ClientValidationFunction</a> Code. If you need to display just the summary without a popup, this is not needed.</p> <pre><code>&lt;asp:CustomValidator ID="cvMemberNum" runat="server" CssClass="ValidationMessage" Display="Dynamic" ControlToValidate="txtMemberNum" ValidateEmptyText="false" OnServerValidate="cvMemberNum_Validate" ClientValidationFunction = "ClientValidate" ErrorMessage="This membership number is already registered"&gt;*&lt;/asp:CustomValidator&gt; //JavaScript Code. function ClientValidate(source, args) { args.IsValid = false; //you need to add validation logic here } </code></pre> <p><strong>MORE:</strong> If you don't want to do ClientSide Validation, try this trick to show the alert. Make this change to your CustomValidator ServerValidate method:</p> <pre><code>protected void cvMemberNum_Validate(object source, ServerValidateEventArgs args) { bool isValid = true; try { isValid = (!CampaignRegistration.IsMemberRegistered(args.Value)); } catch { isValid = false; } args.IsValid = isValid; if(!isValid) { if(!Page.IsClientScriptBlockRegistered("CustomValidation")) Page.RegisterClientScriptBlock("CustomValidation", "&lt;script&gt;alert('This membership number is already registered');&lt;/script&gt;"); } } </code></pre>
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    1. POElegant way to make CustomValidator work with ValidationSummary messagebox
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    1. USJose Basilio
    1. USJose Basilio
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    1. COI'm pretty sure that's not where the problem is. However, I'll try that and report back.
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      1. USAlfero Chingono
    2. COI updated my post after making an observation. Please confirm.
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      1. USJose Basilio
    3. COThe code you highlighted is actually ok. Validation fails if the user is already registered. That part works. What happens is, the '*' appears next to the textbox, but the ValidationSummary does not render a messagebox.
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      1. USAlfero Chingono
 

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