public class anysFileChange  {    /// <summary>    /// 文件change后，其對(duì)應(yīng)的業(yè)務(wù)邏輯所需要做的變動(dòng)鎖調(diào)用的委托    /// 轉(zhuǎn)換完之后 會(huì)調(diào)用所執(zhí)行的函數(shù)，用戶需要干什么，這個(gè)函數(shù)則交由用戶自己的邏輯完成    /// </summary>    public static anysChangingHandlerCallBack _handler = null;    /// <summary>    /// 轉(zhuǎn)換文件    /// </summary>    /// <param name="filepath">文件路徑</param>     /// <returns></returns>    public static void ChangingFile(string filepath, string attachId)    {      //開(kāi)啟異步轉(zhuǎn)換      DEGAsyncChangingFile acf = new DEGAsyncChangingFile(anysFileChange.AsyncChangeFileToswf);      acf.BeginInvoke(filepath, attachId, anysFileChange.CallBackAsync, acf);          }    /// <summary>    /// 異步函數(shù)執(zhí)行完后的的回調(diào)函數(shù)    /// </summary>    /// <param name="IR">異步結(jié)果 </param>    /// <returns></returns>    private static void CallBackAsync(IAsyncResult IR)    {      DEGAsyncChangingFile acf = (DEGAsyncChangingFile)IR.AsyncState;      ResultObj result = (ResultObj)acf.EndInvoke(IR);      //如果調(diào)用 文件轉(zhuǎn)換結(jié)束方法有定義 轉(zhuǎn)換結(jié)束需要做的委托那么執(zhí)行用戶定義的委托函數(shù)      if (_handler != null && result != null)      {        ///成功才執(zhí)行客戶自定義的回調(diào)函數(shù)        if (result.changestaus == EnumChangeStatus.SUCCESS)        {          _handler(result.filepath, result.attachId);        }      }    }    /// <summary>    /// 轉(zhuǎn)換文件    /// </summary>    /// <param name="filepath">文件路徑</param>     /// <returns>HSUFResultObj 返回結(jié)果對(duì)象</returns>    private static ResultObj AsyncChangeFileToswf(string filepath,string attachId)    {      ResultObj res = new ResultObj();      //轉(zhuǎn)換動(dòng)作      ConvertFile cf = new ConvertFile();      //cf這個(gè)類提供了一個(gè)寫(xiě)日志的事件 注冊(cè)一個(gè)寫(xiě)日志事件      cf.ConvertLog += new ConvertFile.ConvertLogHandler(Syslog);      //這里的cf這個(gè)類提供的方法，僅僅利用里面的轉(zhuǎn)換方法算了             cf.Convert(filepath);            if (cf.ChangeResult == EnumChangeStatus.SUCCESS)       {         res.attachId = attachId;                         res.filepath = filepath;         res.changestaus = cf.ChangeResult;       }       else       {         res.changeMessage = cf.convertMessage;         res.changestaus = cf.ChangeResult;       }      return res;    }    /// <summary>    /// 供注冊(cè)的日志事件    /// </summary>    /// <param name="messages"></param>    private static void Syslog(string messages)    {      string separateLine = "/r/n============================================================================================/r/n";      string log = string.Format(@"{0} {1} {2} {0}", separateLine, DateTime.Now.ToString(), messages);      // 如果上傳課程文件夾不存在，則創(chuàng)建      if (!Directory.Exists(ConverConst.toolpath + "Log//"))        Directory.CreateDirectory(ConverConst.toolpath + "Log//");      StreamWriter sw = new StreamWriter(ConverConst.toolpath+"Log//"+DateTime.Now.ToString("yyyy-MM-dd")+".txt", true);      sw.WriteLine(log);      sw.Close();    }    /// <summary>    /// 文件轉(zhuǎn)換委托    /// </summary>    /// <param name="filepath">文件路徑</param>     /// <returns> </returns>    private delegate object DEGAsyncChangingFile(string filepath,string attachId);  }  /// <summary>  /// 結(jié)果集對(duì)象  /// </summary>  public class ResultObj  {    /// <summary>    /// 文件路徑    /// </summary>    public string filepath;    /// <summary>    /// id    /// </summary>    public string attachId;    /// <summary>    /// 轉(zhuǎn)換結(jié)果消息     /// </summary>    public string changeMessage;    /// <summary>    /// 轉(zhuǎn)換狀態(tài)    /// </summary>    public EnumChangeStatus changestaus;  }  /// <summary>  /// 文件轉(zhuǎn)換后，業(yè)務(wù)邏輯所需要調(diào)用的委托  /// </summary>  /// <param name="filepath">文件路徑</param>   public delegate void anysChangingHandlerCallBack(string filepath,string attchid);