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These validation attributes validates most of your user inputs but still validation for Email, File Extension, Credit Card, URL, etc are missing.
Fortunately, some of these validation attributes are available in ASP. In this article, I will show you how to leverage Email, Url, Credit Card and File Extensions validation attributes(which are available in ASP.
NET MVC 2 in regards to way that validation is handled.
The conversation was kick-started by my blog post about the Required attribute and what it does (and does not) mean.
In addition to validation, there are also possible model-binding errors.
Incomplete or improperly formatted user inputs will create lot of problems for your application. NET MVC 3 makes it very easy to validate most common input validations. NET MVC 3 includes Required, String Length, Range, Regular Expression, Compare and Remote validation attributes for common input validation scenarios. We run the property-level validators first, and if all of those succeed, we'll run the model-level validators.In the case of our Contact object with [Required] on the editable properties, if you accidentally left off the Last Name property (or a bad guy "under-posted" the form without it), the validation system would see the null Last Name value and trigger the error message.Home Address" validators there, what I mean is that we're running any validators that are on the property itself, or on the Address type as model-level validators.That does not include Street, City, State, or Zip Code property validators.
More importantly, I want to re-address the security issues I brought up in the last post, now in the context of Model Validation, to understand whether this change makes your applications more secure.