C# 该文件已存在时无法创建文件
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Cannot create a file when that file already exists
提问by Ramesh
I am using Winforms, and I am trying to copy a file from one location to another. If a file with the same name is already there, I want to overwrite it. But I get an error like "Cannot create a file when that file already exists."
我正在使用 Winforms，并且正在尝试将文件从一个位置复制到另一个位置。如果同名文件已经存在，我想覆盖它。但我收到类似“当该文件已存在时无法创建文件”的错误消息。
I want to overwrite the file. What should I do?
I tried File.copyinstead of File.move, but I got the same error.
我想覆盖文件。我该怎么办？我尝试了File.copy而不是File.move，但我遇到了同样的错误。
回答by Vinko Vrsalovic
回答by sdp07
have you tried File.Copy(src, dest, true). This might help overwriting the existing file.
你试过吗File.Copy(src, dest, true)。这可能有助于覆盖现有文件。
回答by Himadri
Check the write permission is allowed for the folder contains the destination file.
检查包含目标文件的文件夹是否允许写入权限。
Try the following:
请尝试以下操作：
System.IO.File.Copy(src, dst, true);
System.IO.File.Copy(src, dst, true);
true if you want the existing file will be overwritten.
如果您希望现有文件将被覆盖，则为 true。
To change or set file permission click here
要更改或设置文件权限，请单击此处
回答by Jerry
I had the same error. The destination should be the new filename, not the destination folder.
我有同样的错误。目标应该是新文件名，而不是目标文件夹。
