Custom ValidationSummary template Asp.net MVC 3

Question

I am working on a project with Asp.Net MVC3

In a View I have @Html.ValidationSummary(true) and as usually it produces

Answer 1

This question details the procedure of writing custom validation summary.

EDIT This will do what you want:

public static class LinqExt 
{
    public static string MyValidationSummary(this HtmlHelper helper, string validationMessage="")
    {
        string retVal = "";
        if (helper.ViewData.ModelState.IsValid)
            return "";

        retVal += "
";
        if (!String.IsNullOrEmpty(validationMessage))
            retVal += helper.Encode(validationMessage);
        retVal += "";
        retVal += "
";
        foreach (var key in helper.ViewData.ModelState.Keys) 
        {
            foreach(var err in helper.ViewData.ModelState[key].Errors)
                retVal += "
" + helper.Encode(err.ErrorMessage) + "
";
        }
        retVal += "
";
        return retVal.ToString();
    }
}

The code is self explanatory; just enumerating through modelstate errors and wrapping errors in dom element of your choice. There is an error that is if i use it like:

<%:Html.MyValidationSummary()%>

It will display html tags on the page as text rather than rendering it.

<%=Html.MyValidationSummary()%>

This works fine.