发布于 2016-06-10 06:14:31 | 121 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的精品教程,程序狗速度看过来!

ASP.NET

ASP.NET 是.NET FrameWork的一部分,是一项微软公司的技术,是一种使嵌入网页中的脚本可由因特网服务器执行的服务器端脚本技术,它可以在通过HTTP请求文档时再在Web服务器上动态创建它们。 指 Active Server Pages(动态服务器页面) ,运行于 IIS(Internet Information Server 服务,是Windows开发的Web服务器)之中的程序 。


MVCHandler应该算是MVC真正开始的地方。MVCHandler实现了IHttpHandler接口,ProcessRequest便是方法入口


MVCHandler : IHttpHandler
void IHttpHandler.ProcessRequest(HttpContext httpContext)
{
    this.ProcessRequest(httpContext);
}

protected virtual void ProcessRequest(HttpContext httpContext)
{
    HttpContextBase base2 = new HttpContextWrapper(httpContext);
    this.ProcessRequest(base2);
}

protected internal virtual void ProcessRequest(HttpContextBase httpContext)
{
    IController controller;
    IControllerFactory factory;
    this.ProcessRequestInit(httpContext, out controller, out factory);
    try
    {
        controller.Execute(this.RequestContext);
    }
    finally
    {
        factory.ReleaseController(controller);
    }
}       


Controller : ControllerBase : IController
void IController.Execute(RequestContext requestContext)  //------>Controller
{
    this.Execute(requestContext);
}

protected virtual void Execute(RequestContext requestContext)   //------>ControllerBase
{
    if (requestContext == null)
    {
        throw new ArgumentNullException("requestContext");
    }
    if (requestContext.HttpContext == null)
    {
        throw new ArgumentException(MvcResources.ControllerBase_CannotExecuteWithNullHttpContext, "requestContext");
    }
    this.VerifyExecuteCalledOnce();
    this.Initialize(requestContext);
    using (ScopeStorage.CreateTransientScope())
    {
        this.ExecuteCore();
    }
}

protected override void ExecuteCore()   //------>Controller
{
    this.PossiblyLoadTempData();
    try
    {
        string requiredString = this.RouteData.GetRequiredString("action");
        if (!this.ActionInvoker.InvokeAction(base.ControllerContext, requiredString))   //public IActionInvoker ActionInvoker { get; set; }
        {
            this.HandleUnknownAction(requiredString);
        }
    }
    finally
    {
        this.PossiblySaveTempData();
    }
}


ControllerActionInvoker : IActionInvoker
public virtual bool InvokeAction(ControllerContext controllerContext, string actionName)
{
    if (controllerContext == null)
    {
        throw new ArgumentNullException("controllerContext");
    }
    if (string.IsNullOrEmpty(actionName))
    {
        throw new ArgumentException(MvcResources.Common_NullOrEmpty, "actionName");
    }
    ControllerDescriptor controllerDescriptor = this.GetControllerDescriptor(controllerContext);
    ActionDescriptor actionDescriptor = this.FindAction(controllerContext, controllerDescriptor, actionName);
    if (actionDescriptor == null)
    {
        return false;
    }
    FilterInfo filters = this.GetFilters(controllerContext, actionDescriptor);
    try
    {
        AuthorizationContext context = this.InvokeAuthorizationFilters(controllerContext, filters.AuthorizationFilters, actionDescriptor);
        if (context.Result != null)
        {
            this.InvokeActionResult(controllerContext, context.Result);
        }
        else
        {
            if (controllerContext.Controller.ValidateRequest)
            {
                ValidateRequest(controllerContext);
            }
            IDictionary<string, object> parameterValues = this.GetParameterValues(controllerContext, actionDescriptor);
            ActionExecutedContext context2 = this.InvokeActionMethodWithFilters(controllerContext, filters.ActionFilters, actionDescriptor, parameterValues);
            this.InvokeActionResultWithFilters(controllerContext, filters.ResultFilters, context2.Result);
        }
    }
    catch (ThreadAbortException)
    {
        throw;
    }
    catch (Exception exception)
    {
        ExceptionContext context3 = this.InvokeExceptionFilters(controllerContext, filters.ExceptionFilters, exception);
        if (!context3.ExceptionHandled)
        {
            throw;
        }
        this.InvokeActionResult(controllerContext, context3.Result);
    }
    return true;
}

protected virtual void InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
{
    actionResult.ExecuteResult(controllerContext);
}


ActionResult
public override void ExecuteResult(ControllerContext context)
{
    if (context == null)
    {
        throw new ArgumentNullException("context");
    }
    if (string.IsNullOrEmpty(this.ViewName))
    {
        this.ViewName = context.RouteData.GetRequiredString("action");
    }
    ViewEngineResult result = null;
    if (this.View == null)
    {
        result = this.FindView(context);   //ViewEngineResult
        this.View = result.View;    //IView接口    
    }
    TextWriter output = context.HttpContext.Response.Output;
    ViewContext viewContext = new ViewContext(context, this.View, this.ViewData, this.TempData, output);
    this.View.Render(viewContext, output);
    if (result != null)
    {
        result.ViewEngine.ReleaseView(context, this.View);
    }
}



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