如何检查文档是否存在？ [英] How Do I Check Whether Document Exist Or Not ?

问题描述

我想查看文件是否存在。这是文档上载的源代码。

I would like to check the document exist or not. This is the source code for Document Upload.

推荐答案

您可以检查用户是否选择了 FileUpload.HasFile [ ^ ]

You can check if the user has selected a file with FileUpload.HasFile[^]

if (fuDocument.HasFile)
   {
   ...

但你无法专门检查客户端计算机上是否存在文件。

虽然服务器上存在文件但很简单：

but you can't check specifically to see if a file exists on the client computer.
It's simple to check if the file exists on the server already though:

if (File.Exists(path))
   {
   ...

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