ActionResult源码分析笔记

ActionResult是一个抽象类：

    public abstract class ActionResult
    {
        public abstract void ExecuteResult(ControllerContext context);
    }

ActionResult的实现类都是通过操作Response对象，实现不同输出 

ActionResult的实现类：

JsonResult：

默认情况下禁止Get访问，所以Get请求需要加AllowGet参数　　

response.ContentType = "application/json";
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
javaScriptSerializer.Serialize(Data)

ContentResult：

response.Write(Content);

EmptyResult：

什么都不返回~

RedirectResult：

context.HttpContext.Response.Redirect(url, false);

NotFound：

context.HttpContext.Response.StatusCode = 404;

HttpStatusCodeResult：同上

HttpUnauthorizedResult：未授权，同上

FileResult：文件，重载

//字节数组
response.OutputStream.Write(FileContents, 0, FileContents.Length);

//流
Stream outputStream = response.OutputStream;
            using (FileStream)
            {
                byte[] buffer = new byte[4096];
                while (true)
                {
                    int num = FileStream.Read(buffer, 0, 4096);
                    if (num != 0)
                    {
                        outputStream.Write(buffer, 0, num);
                        continue;
                    }
                    break;
                }
            }

JavaScriptResult：

HttpResponseBase response = context.HttpContext.Response;
response.ContentType = "application/x-javascript";
if (Script != null)
{
　　response.Write(Script);
}

ViewResult

根据视图名称获取视图类，视图类是WebViewPage类的子类，实例化并传变量(ViewData、Model..)，调用视图类的RenderView()方法，将内容写入output流中