Building an Extensible Fluent Validation Framework using Generic Funcs and Wiring it up to MVC 4 with ModelValidatorProvider and ModelValidator. Blog Using Fluent Validation with ASP.NET MVC - Part 2: Unit Testing Posted by Jerrie Pelser on May 13, 2013. In my previous blog post I looked at the basics of. Setting up FluentValidation for ASP.NET MVC using Ninject FluentValidation is a powerful library to validate your model objects fluently. Setting up FluentValidation. ![]()
![]() Fluent. Validation and Unity - Code. Project. Introduction. Validation is often the bane of a development project. Luckily Jeremy Skinner has created an excellent open source validation framework called Fluent Validation for . NET. Jeremy has created a lot of documentation, so this article will not cover the features and usage of Fluent Validation for . NET. One feature the documentation does not cover is how to pass the validation object via dependency injection when using Unity, which is an Inversion of Control (Io. C) container. This article addresses how to do this. For the attached example I've used Silverlight, but the same techniques can be used with WPF. Background. Dependency injection is a useful pattern to acheive loose coupling and also simplify testing by allowing dependencies to be stubbed or mocked. By being able to pass a validation object into a business object or view model (in the case of MVVM), tests can be written for the business object or view model without requiring the business object or view model to be valid. The validation object can be stubbed to always pass or fail as required. This article does not cover unit tests, mocking, and dependency injection. It is assumed that the reader is already conversant with these techniques. Using the code. The first step is to create a Unity validator factory from the Validator. Factory. Base provided by Fluent Validation for . NET. The important code is the override for Create. Instance, which allows the factory to return the correct validation object from the Unity container. Unity. Validator. Factory : Validator. Factory. Base. . In the attached example, this is done in the Bootstrapper. Container. Register. Type< IValidator. Factory, Unity. Validator. Factory> (new Container. Controlled. Lifetime. Manager()). Now the validation class can be created by inheriting from the Abstract. Validator base class. See Fluent Validation for . NET documentation for more information about how to build validation rules from this base class. In the attached example, this is also registered in Bootstrapper. An example of validating a property is shown below. Note that a validation object can return more than one error, so the Validation. Result contains an Errors collection. A Quick Introduction to Fluent Validation in ASP. MVCApr 0. 2, 2. 01. In one of the projects I am working on we are using ASP. MVC for our web front- end. I love the framework but I have never really been thrilled about validation using the Data. Annotations library. Based on the recommendation of some other people I discovered the Fluent. Validation library. The goal of this post is to show you how to create a very simple MVC application using Fluent. Validation as an alternative to Data. Annotations. The first thing you need to do is create a new MVC Application using Visual Studio 2. The template you choose does not matter but for this post I am using the Internet Application template. There won’t be any authentication in the application so the Intranet template will work fine too. Once the project is created right- click on the References item in Solution Explorer and click Manage Nu. Get Packages (if you do not see this menu then make sure you download the most recent version of Nu. Get from Nu. Get. This will bring up the Package Manager dialog. In the Search box, type in Fluent. Validation and hit Enter. You should see a few packages in the results list. The one you want to add to the project is Fluent. Validation. MVC3. This will install the Fluent. Validation MVC3 package and Fluent. Validation itself (the MVC3 package depends on it). Select the Fluent. Validation. MVC3 package in the list and click the Install button: Once the assemblies are added to the Solution, you can close the Package Manager and open the Global. You need to add a single line to your project to configure the framework to work with MVC. It asks for a username, password (with confirmation), date of birth and number of children. Now that we have a model we can create the controller actions for it. We will need a GET and POST action: . If you were to run the code right now there would be no validation. Let's fix that by creating a new validator class: public class Registration. Validator : Abstract. Validator . Add the following attribute to our Registration. Model class: . The same rules apply when using client side validation. You need to include j. Query, j. Query Validation and optionally include j. Query Unobtrusive Validation scripts. These steps are no different than using Data. Annotations so it's very simple to convert a site to use the framework. If you are using Dependency Injection then you can also create your own validator factory that will wire up the validators for you so you don't need to register the type of validator on each model you create. If you use Ninject, there is already a Nu. Get package that has a validator factory that you can use. Just open up the Nu. Get package manager and search for Ninject. Extensions. Fluent. Validation. Fluent. Validation is a very powerful framework. There are plenty of built in validators that you can use such as verifying a credit card or e- mail address. Creating your own custom validators is also very simple. Head on over to the Code. Plex page today and look at the documentation to start using it in your projects.
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