ASP.net MVC 3.0 General Validation Method

Question

I'm just learning MVC 3.0 and ValidationMessageFor works great, but each one of those is attached to a specific user input.

How would I go about creating a general validation error?

I.E.: A number of fields are supposed to add up to 100. Each one individually has a possible range of 0-100, but combined should also not cross 100.

I want to notify the user of this error.

Tejs · Accepted Answer · 2011-08-25 18:21:44Z

2

You can always insert a record manually like so:

 if(numbers > 100)
   ModelState.AddModelError("key", "Message I want to show");

When you use

Html.ValidationSummary()

It will show up.

answered Aug 25, 2011 at 18:21

Tejs

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5 Comments

Justin Over a year ago

Thanks Tejs, what is the "key" isn't that linked to an attribute of the model? I tried calling "random" but the error wouldn't display. Thanks!

Tejs Over a year ago

It's a dictionary under the hood. The 'key' is normally the property name.

Justin Over a year ago

Thanks Tejs for the help, but it doesn't seem to be working. Even when ValidationSummary is true it my separate message still doesn't show.

Justin Over a year ago

Also, is there a way to do this in the Model itself?

JustinP8 Over a year ago

You can also use Html.ValidationMessage("key") to display an inline message wherever you want on the page, if you used the ModelState.AddModelError("key", "Message I want to show"); functoinality.

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