Check if Html.ValidationSummary() has a value

How can I check if Html.ValidationSummary() has any errors?

Ultimate result required:

<% if(I_HAVE_ERRORS) {%>
<div><%= Html.ValidationSummary() %></div>
<%}%>

In other words, how can I determin开发者_高级运维e "I_HAVE_ERRORS"?

---

<%if (!Html.ViewData.ModelState.IsValid){%>

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To use with razor syntax

@if (!Html.ViewData.ModelState.IsValid)
{
    // show error
}

or you can wrap it up as an extension method

public static bool HasErrors(this HtmlHelper helper)
{
    return helper.ViewData.ModelState.IsValid == false;
}

Use it as

@if (Html.HasError())
{
    // show error
}

---

If you need to check for errors not related to any specific fields, you could try this:

@if(Html.ViewData.ModelState.ContainsKey(string.Empty))
{
    <div class="panel panel-danger">
        <div class="panel-heading">
            @Html.ValidationSummary(true)
        </div>
    </div>
}

---

Actually, I think the most correct way of checking for validation errors (not just auto generated ones based on the model), would be;

@if (Model.ViewData.ModelState.ErrorCount > 0)
{
}

This way it will include user generated model errors.