asp.net 中插入flash

最近写了一个关于在asp.net 下，播放flash 的东西。其实，这东西大家都很熟悉，网上关于此类的代码也很多，但是请注意下边代码的红色注释，flash文件为本工程下的目录。
如：

<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0"
                        width="575" height="375" align="middle">
                        <param name="movie" value='/flashs/flash.swf''> 注意：此处为该工程下的相对目录
                        <param name="quality" value="high">
                        <param name="wmode" value="Transparent" />
                        <param name="menu" value="false" />
                        <param name="FlashVars" value="init=yes&check=true" />
                        <embed src='/flashs/flash.swf'''  ——注意：此处为该工程下的相对目录
                        quality="high" wmode="transparent" width="575" height="375"
                            name="fileUpload" align="middle" allowscriptaccess="sameDomain" type="application/x-shockwave-flash"
                            pluginspage="http://www.macromedia.com/go/getflashplayer" /></object>

可是如果要是工程外部的目录或者是其他的磁盘映射，这么是无法工作的。那怎么办呢！功夫不负我这样的有心人，终于在网上找到一关于把flash 转换成stream 的一个方法，经过一点小的改动完成。
如下：
FLVStreamHandler 代码：
<% @ WebHandler Language = " C# "  Class = " FLVStreamHandler "   %>

using  System;
using  System.Web;
using  System.IO;
using  Tribal.Tsite.API;
using  Tribal.Tsite.Implementation;

public   class  FLVStreamHandler : IHttpHandler {

     private   static   readonly   byte [] _flvheader  =  HexToByte( " 464C5601010000000900000009 " );  // "FLV\x1\x1\0\0\0\x9\0\0\0\x9"
    
     public   void  ProcessRequest (HttpContext context) 
    {
        
       
        
         try
        {
             int  pos;
             int  length;

             //  Check start parameter if present
             // string filename = Path.GetFileName(context.Request.FilePath);
             int  flashId  =   int .Parse(context.Request.QueryString[ " Id " ]);
            MainController mainController  =  MainController.GetInstance();
            IFlashFile flashFile  =  mainController.FlashFileController.GetFlashFileById(flashId);

             string  flashPath  =   "" ;
             if  (File.Exists(flashFile.FilePath  +  flashFile.FileName))
                flashPath = flashFile.FilePath  +  flashFile.FileName;
             else
                flashPath  =  context.Server.MapPath( " ~/App_Themes/Normal/Images/default.swf " );
                
             using  (FileStream fs  =   new  FileStream(flashPath, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                 string  qs  =  context.Request.Params[ " start " ];

                 if  ( string .IsNullOrEmpty(qs))
                {
                    pos  =   0 ;
                    length  =  Convert.ToInt32(fs.Length);
                }
                 else
                {
                    pos  =  Convert.ToInt32(qs);
                    length  =  Convert.ToInt32(fs.Length  -  pos)  +  _flvheader.Length;
                }


                 //  Add HTTP header stuff:clear cache, content type and length        
                context.Response.Cache.SetCacheability(HttpCacheability.NoCache);//注意：如果每次打开都不变换flash文件，请使用缓存
              //context.Response.Cache.SetCacheability(HttpCacheability.Public);
                context.Response.Cache.SetExpires(DateTime.Now.AddDays( - 1 ));
                context.Response.Cache.SetLastModified(DateTime.Now);

                context.Response.AppendHeader( " Content-Type " ,  " video/x-flv " );
                context.Response.AppendHeader( " Content-Length " , length.ToString());
                
                 //  Append FLV header when sending partial file
                 if  (pos  >   0 )
                {
                    context.Response.OutputStream.Write(_flvheader,  0 , _flvheader.Length);
                    fs.Position  =  pos;
                }

                 //  Read buffer and write stream to the response stream
                 const   int  buffersize  =   16384 ;
                 byte [] buffer  =   new   byte [buffersize];

                 int  count  =  fs.Read(buffer,  0 , buffersize);
                 while  (count  >   0 )
                {
                     if  (context.Response.IsClientConnected)
                    {
                        context.Response.OutputStream.Write(buffer,  0 , count);
                        count  =  fs.Read(buffer,  0 , buffersize);
                    }
                     else
                    {
                        count  =   - 1 ;
                    }
                }
            }
        }
         catch  (Exception ex)
        {
            System.Diagnostics.Debug.WriteLine(ex.ToString());
        }
    }
 
     public   bool  IsReusable 
    {
         get  
        {
             return   false ;
        } 
    }

     private   static   byte [] HexToByte( string  hexString)
    {
         byte [] returnBytes  =   new   byte [hexString.Length  /   2 ];
         for  ( int  i  =   0 ; i  <  returnBytes.Length; i ++ )
            returnBytes[i]  =  Convert.ToByte(hexString.Substring(i  *   2 ,  2 ),  16 );
         return  returnBytes;
    }

}

前台代码：
 

< object  classid = " clsid:d27cdb6e-ae6d-11cf-96b8-444553540000 "  codebase = " http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0 "
                        width = " 575 "  height = " 375 "  align = " middle " >
                         < param name = " movie "  value = ' http://www.cnblogs.com/Handler/FLVStreamHandler.ashx?Id=<%=FlashFileId %>' >注意：通过FLVStreamHandler.ashx把fllash流化
                         < param name = " quality "  value = " high " >
                         < param name = " wmode "  value = " Transparent "   />
                         < param name = " menu "  value = " false "   />
                         < param name = " FlashVars "  value = " init=yes&check=true "   />
                         < embed src = ' http://www.cnblogs.com/Handler/FLVStreamHandler.ashx?Id=<%=FlashFileId %> '  quality = " high "  wmode = " transparent "  width = " 575 "  height = " 375 "
                            name = " fileUpload "  align = " middle "  allowscriptaccess = " sameDomain "  type = " application/x-shockwave-flash "
                            pluginspage = " http://www.macromedia.com/go/getflashplayer "   /></ object >

以上是我在开发时，解决asp.net 中插入flash的一种方法。