[FileNotFoundException: 未能找到文件“D:\TravelSystem\CITSERPFile”。]
System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +382
System.IO.FileInfo.get_Length() +12857485
DownLoadFile.ProcessRequest(HttpContext context) in d:\TravelSystem\CITSERPFile\DownLoadFile.ashx:15
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +188
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69
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