检查服务器上是否存在文件 [英] Check if a file exists on the server

问题描述

我正在尝试检查服务器上是否有文件，并且ASP.NET网页后面带有C#代码.我知道该文件确实存在，因为我事先已将其以一段代码形式放在服务器上.谁能看到为什么找不到该文件.这是代码:

I am trying to check if a file is on the server with the C# code behind of my ASP.NET web page. I know the file does exist as I put it on the server in a piece of code before hand. Can anyone see why it is not finding the file. This is the code:

wordDocName = "~/specifications/" + Convert.ToInt32(ViewState["projectSelected"]) + ".doc";
ViewState["wordDocName"] = wordDocName;
if (File.Exists(wordDocName))
{
    btnDownloadWordDoc.Visible = true;
}
else
{
    btnDownloadWordDoc.Visible = false;
}

推荐答案

文件路径应该是物理的而不是虚拟的.使用

the file path should be physical not virtual. Use

if (File.Exists(Server.MapPath(wordDocName)))

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