上传并保存图片文件---web服务

近几天没事，仿照网上资料写了个web服务 上传并保存图片文件

[WebMethod(Description="上传并保存图片文件")]
  public bool SaveFile(byte[] binData,string fileName)
  {
   bool success=false;

  
             string savePath=Server.MapPath("Mp3");
   if(!Directory.Exists(savePath))
   {
    throw new Exception("服务器端没有找到有效的保存路径！");
   }

   FileStream fileStream=null;
   try
   {
    fileStream=new FileStream(savePath + fileName,FileMode.Create,FileAccess.Write);
    //write the file
    fileStream.Write(binData,0,binData.Length);
    fileStream.Flush();//clear the buffer,write the data to the hard disk
    success=true;
   }
   catch(Exception ex)
   {
    throw new Exception(ex.Message);
   }
   finally
   {
    fileStream.Close();
   }
   return success;

  }