CODEWITHSUNDEEP
asp.netvalidationasp.net-mvc-2data-annotations
Justin Soliz
Justin Soliz

Reputation: 2811

Asp.net Mvc2 Data Annotations Validation (Client Side works, Server side Doesnt??)

I'm using an entity model with metadata annotations. My controller method looks like this...

        if (!ModelState.IsValid)
        {
            return View(model);
        }
        else
        {
            UpdateModel(model);
            repo.Save();
            return RedirectToAction("Index");
        }

If I enable client side validation in the view I'll get the error per the Attributes from the metadata class. If I take clientside validation out, error gets thrown from saving to the DB rather than return the view with an Error Summary.

This is the top portion of my view....

<% using (Html.BeginForm())
   {%>
<%: Html.ValidationSummary(true) %>

I've tried running without debugging (ctrl + f5) in debug and release mode as well as setting breakpoints and Debugging (f5) but it just seems weird to get Client side validation without server side validation. What am I missing here?

Upvotes: 1

Views: 607

Answers (1)

Rob
Rob

Reputation: 5603

UpdateModel populates the model from form collection, routing parameters, etc. and does validation on the server side. You need to check ModelState.IsValid after updating. The usual pattern is...

if (!TryUpdateModel(model))
{
  // Validation Failed...
  return View(model);
}

// Validation Passed...

Note that TryUpdateModel catches exceptions and returns false if they're raised. If they aren't, then it simple returns ModelState.IsValid.

Upvotes: 1

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