[FileNotFoundException: 未能找到文件“D:\wwwroot\FlowMeter2\wwwroot\Product\”。]
System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +10768646
System.IO.FileInfo.get_Length() +11116937
Download.downloadfile(String s_fileName) +431
Download.ProcessRequest(HttpContext context) +64
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +341
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69
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