vb.net 复制具有特定扩展名的所有文件
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copy all files with certain extension
提问by joetinger
Hello I want to copy all files with and a specific extension. I've tried a few things but it isn't working. During my debug I get an exception "Illegal characters used in path" I'm guessing it doesn't like *.xls any suggestions?
您好，我想复制带有特定扩展名的所有文件。我已经尝试了一些东西，但它不起作用。在调试期间，我收到一个异常“路径中使用了非法字符”，我猜它不喜欢 *.xls 有什么建议吗？
First try
第一次尝试
My.Computer.FileSystem.CopyFile("C:\test\test\mxw\*.xls\", "C:\workorder1-23\workorder1-23\mxw\", True)
second try
第二次尝试
For Each f In Directory.GetFiles("C:\test\test\mxw\*.xls\", CStr(SearchOption.AllDirectories))
If My.Computer.FileSystem.FileExists(f.ToString) Then
File.Copy("C:\test\test\mxw\*.xls\", "C:\workorder1-23\workorder1-23\mxw\", True)
End If
Next
回答by Steve
CopyFile copies just one file.
You cannot use it with wildcards to copy a group of files. (The invalid character is probably the wildcard)
And you should not append a backslash at the end of the file.
CopyFile 只复制一个文件。
您不能将它与通配符一起使用来复制一组文件。（无效字符可能是通配符）并且您不应在文件末尾附加反斜杠。
So let me try to replace your code with this
所以让我试着用这个替换你的代码
For Each f In Directory.GetFiles("C:\test\test\mxw", "*.xls", SearchOption.AllDirectories)
If File.Exists(f) Then
File.Copy(f, Path.Combine("C:\workorder1-23\workorder1-23\mxw", Path.GetFileName(f)), True)
End If
Next
Also Directory.GetFileshas three parameters, a path, a pattern and a flag to read subfolders
也Directory.GetFiles有三个参数，路径，图案和标记读取的子文件夹
回答by AfterMidnight
Since File.Copy does not create directories the provided answer will only work if the target directories exist. Add a Create.Directory(f) before the File.Copy if they don't.
由于 File.Copy 不创建目录，因此提供的答案仅在目标目录存在时才有效。如果没有，则在 File.Copy 之前添加 Create.Directory(f)。
