Detailed explanation of the process of finding Action in MyMVC box

First, we need to register MyMVC's HttpHandlerFactory in web.config, which is the entrance to the entire framework.
In the ASP.NET pipeline process, the GetHandler() method will be called, and finally my code has a chance to run!
The first line of code executed by the framework is:

// 根据请求路径，定位到要执行的ActionControllerActionPair pair = UrlParser.ParseAjaxUrl(virtualPath);

public sealed class ControllerActionPair{    public string Controller;    public string Action;}
静态方法UrlParser.ParseAjaxUrl()就是专门用来解析URL并返回ControllerActionPair的：

The code is very simple. The core is actually the regular expression, which extracts the Controller from the URL and the name of the Action depends on it.
As for the use of regular expressions, I think this is a basic skill and will be skipped here.

Let’s look at the second call of AjaxHandlerFactory:

// 获取内部表示的调用信息InvokeInfo vkInfo = ReflectionHelper.GetAjaxInvokeInfo(pair);

The ReflectionHelper class is an internal tool class specifically used for reflection processing. The relevant code for the AjaxAction search process is as follows (note the Comments):

The above is the 4 pieces of code related to AjaxAction search:
1. In the static constructor of ReflectionHelper, I loaded All AjaxControllers.
2. The GetAjaxController method is used to return the type description of a Controller based on its name.
3. The GetAjaxAction method is used to return Action description information based on the type of Controller and the name of the Action to be called.
4. The GetAjaxInvokeInfo method is used to convert the ControllerActionPair description obtained from the AjaxHandlerFactory into more specific description information.

In the code, the search process of Action adopts delayed loading mode. To save the collection of Action description information, I use threadsafetyHashtable

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