ASP. NET mvc3 practice series (III): Using dependency injection (IOC) in mvc3)

Practice series in ASP. NET mvc3 (II): interface-oriented programming to improve system testability. We mentioned earlierProgramAlthough unit testing is possible.

First, we have exposed the repository attribute of homecontroller.

Second, we have a new object in the class. If we get lovers from the database this time, we must modifyCode.

In this section, we introduce a dependency injection tool ninject.

Click to install

Modify homecontroller to the following code:

In this way, we do not need to expose the attributes. Modify the corresponding unit test as shown in. Test passed successfully

However, an error occurred while running the program, because MVC encountered an error when instantiating the controller. Because there is no parameter constructor parameter, we must instantiate the constructor with the parameter.

 

We need to instantiate the Controller ourselves, so we need to create a controllerfactory and let the application use our own controllerfactory.

Then specify the controllerfactory in global. asax. CS.

Press F5 to run the program again.

So far, this application is easy to test and oriented to interface programming. Easy to expand.

 

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