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POSet Items collection of ValidationContext on IValidatableObject?
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copied!<p>I have a view model class that derives from IValidateableObject, and I am using the Validate method with ValidationContext to evaluate it from my controller. </p> <p>I would like to be able to test against more than the properties of the view model class itself in ObjectInstance. I could probably add these things to the model and then everything would be easy, but I don't feel like these things really belong in the view model class, as they are more about the current state of that object.</p> <p>I was wondering if the Items collection in ValidationContext is an appropriate place to store such things... The only problem is that I can't seem to find a resource that explains how I would go about adding things to that dictionary. </p> <p>Does that make sense? Can anyone provide an explanation for how to populate ValidationContext.Items prior to checking the ModelState of an object?</p> <p>UPDATE #1 - I found the following on an old blog entry about EF CTP5 (), but I'm not sure how to use this information:</p> <blockquote> <p>Therefore it is possible to use custom validation logic that can completely replace built-in validation or filter out some validation errors returned by built-in validation. One more little detail about DbContext.ValidateEntity(<a href="http://blogs.msdn.com/b/adonet/archive/2010/12/15/ef-feature-ctp5-validation.aspx" rel="nofollow">http://blogs.msdn.com/b/adonet/archive/2010/12/15/ef-feature-ctp5-validation.aspx</a>) method is the second parameter of this method which looks like this: </p> <p><code>IDictionary<object, object> items</code></p> <p>By default its value is always null. However overriding DbContext.ValidateEntity() allows to pass a non-null value to this method by calling: </p> <p><code>return base.ValidateEntity(entityEntry, myItems);</code></p> </blockquote> <p>UPDATE #2 - I tried to go down the path of using a custom model binder, but I'm hitting a wall with that too - there does not seem to be a way to simply add items to the ValidationContext and then call the base.OnModelUpdated(controllerContext, bindingContext) method.</p>

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