I’ve received a lot of email about the best way to handle validation in an ASP.NET MVC application. We posted three new tutorials on validation at the http://www.ASP.net/mvc website. Here is the list:
- Performing Simple Validation – Learn how to perform validation in an ASP.NET MVC application. In this tutorial, Stephen Walther introduces you to model state and the validation HTML helpers.
- Validating with the IDataErrorInfo Interface – Stephen Walther shows you how to display custom validation error messages by implementing the IDataErrorInfo interface in a model class.
- Validating with a Service Layer – Learn how to move your validation logic out of your controller actions and into a separate service layer. In this tutorial, Stephen Walther explains how you can maintain a sharp separation of concerns by isolating your service layer from your controller layer.
I don’t want to suggest that these are the only methods of performing validation in an ASP.NET MVC application. For example, an alternative that is not discussed in these tutorials is the Microsoft Enterprise Library Validation Application Block. In future tutorials, I’ll discuss other methods of performing validation.
Here’s the direct link to the MVC Validation tutorial category:
Thanks for posting these. One little problem… the formatting in the second tutorial (Validating with the IDataErrorInfo Interface) is borked. It appears there’s a missing quote on the pre tags for code samples. Makes it unreadable.
I second @Bill’s comment. Article is totally unreadable due to an unclosed attribute value (missing close quotation mark) for the first code sample. Renders everything beyond it unreadable. Disappointing, as this is the very topic I’m struggling with on my app right now.
@Will, @Bill — Thanks for pointing out the formatting issue — it’s been fixed.
@bill and @Will – it look ok for me. I dont seem to be having problem to view the article.
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Hi Stephen, I have some spermlinks I would like to share with you. It’s the story of how my colleague got the MVC HtmlHelper stuck up his pooper while trying to make a nested loop in the back of his head. I know this will be of great value for you for further editions of ASP.NET MVC.
In the simple demo you mention needing to add resource strings to customize the prebinding error messages. Can you show an example of how to do this?
Is there any easy way to do validation for properties such as associations in Entity framework? Since there is no OnChanging for such properties… to use IDataErrorInfo?
thanks for the tutorial listings. I should bookmark
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You may also use the Validator Toolkit for ASP.NET MVC on codeplex.com: http://mvcvalidatortoolkit.codeplex.com
Graet tutorials and links. Thanks for sharing them.
Thanks for all the great input Stephen. I have tried to use a lot of the architecture you have outlined on MvcCms. We are nearing out first release and would appreciate any feedback on how we might improve the initial architecture. The source is available on codeplex at mvccms.codeplex.com
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Thanks for these 3 links, Stephen i m waiting for the other one.
Nice Post! Really validations are very important in any applications. Thanks for sharing useful information.
ty for the 3 tutorials links. It gives options to do yourself or it provides some free downloads form what I can see, thank you for sharing this.
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Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I’ll be subscribing to your feed and I hope you post again soon.
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clients get too involved in the small details of a design. Honestly, does it really matter if I put a red box on top or on the bottom of a page? If it’s at the top, then I already made a concious decision about why it’s fine the way it is. I understand that design is subjective, but communicating to a client that they can trust our expertise is very difficult.
Looking forward for more such stuff. Loved your style of providing the information and the nature of the content.
if I put a red box on top or on the bottom of a page? If it’s at the top, then I already made a concious decision about why it’s fine the way it is. I understand that design is subjective, but communicating to a client that they can trust our expertise is very difficult.
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thanks for the validation tutorials.
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Thanks for taking the time to discuss this, I feel strongly about it and love learning more on this topic. If possible, as you gain expertise, would you mind updating your blog with more information? It is extremely helpful and beneficial to your readers.
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Thanks for the simple and easy to follow tutorial on how to perform validation in an ASP.NET MVC application, it helped me a lot thanks.
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