Contents tagged with Validation
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Adding Unobtrusive Validation To MVCContrib Fluent Html
ASP.NET MVC 3 includes a new unobtrusive validation strategy that utilizes HTML5 data-* attributes to decorate form elements. Using a combination of jQuery validation and an unobtrusive validation adapter script that comes with MVC 3, those attributes are then turned into client side validation rules.
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Introducing Data Annotations Extensions
Validation of user input is integral to building a modern web application, and ASP.NET MVC offers us a way to enforce business rules on both the client and server using Model Validation. The recent release of ASP.NET MVC 3 has improved these offerings on the client side by introducing an unobtrusive validation library built on top of jquery.validation. Out of the box MVC comes with support for Data Annotations (that is, System.ComponentModel.DataAnnotations) and can be extended to support other frameworks. Data Annotations Validation is becoming more popular and is being baked in to many other Microsoft offerings, including Entity Framework, though with MVC it only contains four validators: Range, Required, StringLength and Regular Expression. The Data Annotations Extensions project attempts to augment these validators with additional attributes while maintaining the clean integration Data Annotations provides.
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Adding Client Validation To DataAnnotations DataType Attribute
The System.ComponentModel.DataAnnotations namespace contains a validation attribute called DataTypeAttribute, which takes an enum specifying what data type the given property conforms to. Here are a few quick examples:
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NHibernate Client Validator ASP.NET MVC 2 Model Validation
ASP.NET MVC 2 improves Model Validation in a number of ways, including the addition of client side validation (ala xVal). If you would like more information on Model Validation in ASP.NET MVC 2, see Scott Gu’s detailed post on this subject. Out of the box ASP.NET MVC 2 includes support for DataAnnotations, and there are some extensibility points available for plugging in your own framework.
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Guarding against CSRF Attacks in ASP.NET MVC2
Alongside XSS (Cross Site Scripting) and SQL Injection, Cross-site Request Forgery (CSRF) attacks represent the three most common and dangerous vulnerabilities to common web applications today. CSRF attacks are probably the least well known but they are relatively easy to exploit and extremely and increasingly dangerous. For more information on CSRF attacks, see these posts by
Phil Haack and Steve Sanderson. -
NHibernate Validator ASP.NET MVC 2 Model Validation
ASP.NET MVC2 will improve the built in Model Validation in a number of ways, including the addition of client side validation (ala xVal). If you would like more information on Model Validation in ASP.NET MVC 2, see Scott Gu’s detailed post on this subject. Out of the box ASP.NET MVC 2 will include support for DataAnnotations, and there are some extensibility points available for plugging in your own framework.
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An xVal Provider For NHibernate Validator
I wrote a post about a month ago about using xVal with NHibernate Validator 1.2 which solved a problem I was having upgrading the xVal ‘in-the-box’ provider to work with a newer version of NHibernate Validator. There was a caveat that my solution only worked for ValidatorMode.UseAttribute and I wouldn’t catch XML or Loquacious (or other?) validation. This seemed to work OK, but Fabio Maulo wrote a comment to that post saying NHV has metadata which should be the same no matter which validation mode was used.
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Required Validator For NHibernate Validators
I’ve recently switched from the Enterprise Library Validation Application Block to using NHibernate Validators. If you are not familiar with the NHibernate Validator project, they are part of the NHibernate Contrib project and offer Validation constraints, and validation runner, and tight integration with NHibernate (especially great if you use NHibernate to generate your DB).
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Using xVal with NHibernate Validator 1.2
This will be a quick and dirty post about how to get xVal 1.0 (http://xval.codeplex.com/) to work with the new NHibernate Validator 1.2beta (http://nhforge.org/media/p/7.aspx).
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Enterprise Library Validation – Custom Validators
In this post I am going to create a custom email validator that will integrate with the Enterprise Library Validation Application Block.