ASP.NET MVC中HttpContext, HttpContextBase, HttpContextWrapper联系

水深无声 2022-07-15 23:10 149阅读 0赞

# [ASP.NET MVC中HttpContext, HttpContextBase, HttpContextWrapper联系 ][ASP.NET MVC_HttpContext_ HttpContextBase_ HttpContextWrapper_] #

2013-08-29 19:08  10793人阅读 [评论][Link 1](0) 收藏 [举报][Link 2]

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HttpContext

HttpContext是最原始的ASP.NET Context. MVC的目的之一是能够单元测试。HttpContext没有base class，并且不是virtual,所以不能用单元测试，因为没有办法mock.

HttpContextBase

HttpContextBase, 是用来在MVC中替代HttpContext.但是这是一个abstract类，是mockable的。

HttpContextWrapper

HttpContextWrapper是HttpContextBase的实现类，用来真正的替换HttpContext，可以用new HttpContextWrapper(HttpContext.Current)的方式来创建一个ttpContextWrapper.观察代码可以发现，HttpContext与HttpContextWrapper在属性方法设置上基本上是一样的，只是HttpContextWrapper不是virtual，有base class，因此可以进行单元测试。现在，关于使用到HttpContext的方法，可以通过HttpContextWrapper来进行单元测试。观察ASP.NET MVC的源码可以发现，在最终MVCHandler(ASP.NET MVC的HttpHandler)中，调用ProcessRequest(HttpContext context)方法的时候，其内部把HttpContext转为HttpContextWrapper，然后调用了ProcessRequest(HttpContext context)来进行后续的处理。

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1.  public ProcessRequest(HttpContext context)  
2.  \{  
3.      HttpContextWrapper \_context = new HttpContextWrapper(context);  
4.      ProcessRequest(\_context);  
5.  \}  
6.    
7.    
8.  public ProcessRequest(HttpContextBase context)  
9.  \{  
10.     //进行相应的Controller,Action的调用  
11. \}

![save_snippets.png][]

public ProcessRequest(HttpContext context)
    {
    	HttpContextWrapper _context = new HttpContextWrapper(context);
    	ProcessRequest(_context);
    }
    
    
    public ProcessRequest(HttpContextBase context)
    {
    	//进行相应的Controller,Action的调用
    }

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[ASP.NET MVC_HttpContext_ HttpContextBase_ HttpContextWrapper_]: http://blog.csdn.net/sundacheng1989/article/details/10551091
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