Asp.net MVC Render及Redirect的扩展

namespace  System.Web.Mvc
{
     using  System;
     ///   <summary>
     ///  对Controller的Redirect操作的扩展
     ///  blog: http://chsword.cnblogs.com/
     ///   </summary>
     public   static   class  RedirectExtension
    {
         ///   <summary>
         ///  重定向到上一个Action. 即 header 的 "HTTP_REFERER"  ( <c> Context.UrlReferrer </c> ).
         ///   </summary>
         static   public   void  RedirectToReferrer( this  Controller controller) {
            controller.Response.Redirect(controller.Request.ServerVariables[ " HTTP_REFERER " ]);
        }
        [Obsolete( " 已经过时请使用RedirectToReferrer " )]
         static   public   void  RedirectToReferer( this  Controller controller)
        {
            RedirectToReferrer(controller);
        }
         ///   <summary>  
         ///  Redirect 到站点根目录 ( <c> Context.ApplicationPath + "/" </c> ).
         ///   </summary>
         static   public   void  RedirectToSiteRoot( this  Controller controller) {
            controller.Response.Redirect(controller.Request.ApplicationPath  +   " / " );
        }

    }
}

namespace  System.Web.Mvc
{
     using  System;
     using  System.Text;
     using  System.Web.Script.Serialization;
     using  System.Runtime.Serialization.Json;
     ///   <summary>
     ///  对RenderView的扩展
     ///  blog: http://chsword.cnblogs.com/
     ///   </summary>
     static   public   class  RenderExtension
    {
         ///   <summary>
         ///  显示要显示的文本
         ///   </summary>
         ///   <param name="c"></param>
         ///   <param name="str"> 文本内容 </param>
        [Obsolete( " 仅在Asp.net Mvc Preview2中使用,PV3中已经提供新的方法Content " )]
         static   public   void  RenderText( this  Controller c,  string  str)
        {
            c.HttpContext.Response.Write(str);
        }
         ///   <summary>
         ///  将要显示的对象以JSON返回要客户端
         ///   </summary>
         ///   <param name="c"></param>
         ///   <param name="data"> 要发送的对象 </param>
        [Obsolete( " 仅在Asp.net Mvc Preview2中使用,PV3中已经提供新的方法Json " )]
         public   static   void  RenderJSON( this  Controller c,  object  data)
        {
            c.RenderJSON(data,  null );
        }
         ///   <summary>
         ///  将要显示的对象以JSON返回要客户端
         ///   </summary>
         ///   <param name="c"></param>
         ///   <param name="data"> 要发送的对象 </param>
         ///   <param name="contenttype"> 传送的Content-Type默认为application/json </param>
        [Obsolete( " 仅在Asp.net Mvc Preview2中使用,PV3中已经提供新的方法Json " )]
         public   static   void  RenderJSON( this  Controller c,  object  data,  string  contenttype)
        {
            c.RenderJSON(data, contentType,  null );
        }
         ///   <summary>
         ///  将要显示的对象以JSON返回要客户端
         ///   </summary>
         ///   <param name="c"></param>
         ///   <param name="data"> 要发送的对象 </param>
         ///   <param name="contenttype"> 传送的Content-Type为空则默认为application/json </param>
         ///   <param name="encoding"> 编码方式 </param>
        [Obsolete( " 仅在Asp.net Mvc Preview2中使用,PV3中已经提供新的方法Json " )]
         public   static   void  RenderJSON( this  Controller c,  object  data,  string  contenttype, Encoding encoding)
        {
            HttpResponseBase response  =  c.HttpContext.Response;
             if  ( ! string .IsNullOrEmpty(contenttype))
            {
                response.ContentType  =  contenttype;
            }
             else
            {
                response.ContentType  =   " application/json " ;
            }
             if  (encoding  !=   null )
            {
                response.ContentEncoding  =  encoding;
            }
             if  (data  !=   null )
            {
                            DataContractJsonSerializer sr = new DataContractJsonSerializer(typeof(object));
                sr.WriteObject(response.OutputStream, data);
            }
        }
    }
}