从代码创建 .ics 文件有时会给出“The file[].ics”不是有效的互联网日历文件
我正在构建一个 ASP 站点，在其中使用 response.write 创建一个 ics 文件，用户可以在其中选择打开或保存事件的对话框。当用户选择打开时，Outlook 有时会给出错误“文件 [].ics”不是有效的 Internet 日历文件”。写入响应的始终是相同的事件。代码如下所示：
this.Response.ContentType = "text/calendar";
this.Response.AddHeader("Cache-Control", "no-cache, must-revalidate");
this.Response.AddHeader("Pragma", "no-cache");
this.Response.Expires = -1;
this.Response.AddHeader("Content-disposition", string.Format("attachment; filename={0}.ics",filename));
this.Response.Write("BEGIN:VCALENDAR");
this.Response.Write("\nVERSION:2.0");
this.Response.Write("\nMETHOD:PUBLISH");
this.Response.Write("\nBEGIN:VEVENT");
this.Response.Write("\nType:Single Meeting");
this.Response.Write("\nORGANIZER:MAILTO:" + organizer);
this.Response.Write("\nDTSTART:" + startDate.ToUniversalTime().ToString(DateFormat));
this.Response.Write("\nDTEND:" + endDate.ToUniversalTime().ToString(DateFormat));
this.Response.Write("\nLOCATION:" + location);
this.Response.Write("\nUID:" + Guid.NewGuid().ToString());
this.Response.Write("\nDTSTAMP:" + DateTime.Now.ToUniversalTime().ToString(DateFormat));
this.Response.Write("\nSUMMARY:" + summary);
this.Response.Write("\nDESCRIPTION:" + description);
this.Response.Write("\nPRIORITY:5");
this.Response.Write("\nCLASS:PUBLIC");
this.Response.Write("\nEND:VEVENT");
this.Response.Write("\nEND:VCALENDAR");
this.Response.End();
我通常得到我第一次尝试在 Outlook 中打开该事件时出现错误，第二次时出现此错误
有人知道如何解决此问题吗？
I am building an ASP site where I use response.write to create an ics file where a user can choose open or save dialog for the event. When the user chooses open, Outlook sometimes gives the error "The file [].ics" is not a valid internet Calendar file". It is always the same event that is written to the response. The code looks like this:
this.Response.ContentType = "text/calendar";
this.Response.AddHeader("Cache-Control", "no-cache, must-revalidate");
this.Response.AddHeader("Pragma", "no-cache");
this.Response.Expires = -1;
this.Response.AddHeader("Content-disposition", string.Format("attachment; filename={0}.ics",filename));
this.Response.Write("BEGIN:VCALENDAR");
this.Response.Write("\nVERSION:2.0");
this.Response.Write("\nMETHOD:PUBLISH");
this.Response.Write("\nBEGIN:VEVENT");
this.Response.Write("\nType:Single Meeting");
this.Response.Write("\nORGANIZER:MAILTO:" + organizer);
this.Response.Write("\nDTSTART:" + startDate.ToUniversalTime().ToString(DateFormat));
this.Response.Write("\nDTEND:" + endDate.ToUniversalTime().ToString(DateFormat));
this.Response.Write("\nLOCATION:" + location);
this.Response.Write("\nUID:" + Guid.NewGuid().ToString());
this.Response.Write("\nDTSTAMP:" + DateTime.Now.ToUniversalTime().ToString(DateFormat));
this.Response.Write("\nSUMMARY:" + summary);
this.Response.Write("\nDESCRIPTION:" + description);
this.Response.Write("\nPRIORITY:5");
this.Response.Write("\nCLASS:PUBLIC");
this.Response.Write("\nEND:VEVENT");
this.Response.Write("\nEND:VCALENDAR");
this.Response.End();
I usually get the error the first time I try to open the event in Outlook, and the it works the second time.
Does anyone know how to solve this problem?
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似乎一开始的 Response.Clear() 和 End 之前的 Flush 解决了问题......
It seems like Response.Clear() in the very beginning and Flush before End solves the problem...