Check ModelState in action filter

Question

Can I check ModelState.IsValid in my custom action filter in OnActionExecuting method?

score 11 · Accepted Answer · answered Sep 16 '11 at 06:18

11

Yes. ModelState is part ViewData. So you can get it using:

filterContext.Controller.ViewData.ModelState

For example, if you wanted to inject some code after the action executes, but only if ModelState.IsValid == true, you can do:

public override void OnActionExecuted(ActionExecutedContext filterContext)
{
    if (!filterContext.Controller.ViewData.ModelState.IsValid) return;
    // do something
}

answered Sep 16 '11 at 06:18

awrigley

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Wow, thanks... funny how missing a simple thing like ModelState being a part of ViewData can be so annoying. This also works from the View! – M Thelen Jul 25 '12 at 14:31
It will, ViewData is nothing if not for the View. – awrigley Jul 18 '14 at 21:20

Check ModelState in action filter

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