vb.net 如何检查文件夹中是否已存在文件
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时间：2020-09-09 15:47:20 来源:igfitidea点击:
How to check if file already exists in the folder
提问by Furqan Sehgal
I am trying to copy some files to folder. I am using the following statement to check if the source fie exists
我正在尝试将一些文件复制到文件夹。我正在使用以下语句来检查源文件是否存在
If My.Computer.FileSystem.FileExists(fileToCopy) Then
But I donot know how to check if file exists in the folder before copying. Please advise.
但我不知道如何在复制之前检查文件夹中是否存在文件。请指教。
Thanks and best regards, Furqan
谢谢和最好的问候， Furqan
回答by Bradley Uffner
Dim SourcePath As String = "c:\SomeFolder\SomeFileYouWantToCopy.txt" 'This is just an example string and could be anything, it maps to fileToCopy in your code.
Dim SaveDirectory As string = "c:\DestinationFolder"
Dim Filename As String = System.IO.Path.GetFileName(SourcePath) 'get the filename of the original file without the directory on it
Dim SavePath As String = System.IO.Path.Combine(SaveDirectory, Filename) 'combines the saveDirectory and the filename to get a fully qualified path.
If System.IO.File.Exists(SavePath) Then
'The file exists
Else
'the file doesn't exist
End If
回答by Muhammed Farooq
'In Visual Basic
'在 Visual Basic 中
Dim FileName = "newfile.xml" ' The Name of file with its Extension Example A.txt or A.xml
Dim FilePath ="C:\MyFolderName" & "\" & FileName 'First Name of Directory and Then Name of Folder if it exists and then attach the name of file you want to search.
If System.IO.File.Exists(FilePath) Then
MsgBox("The file exists")
Else
MsgBox("the file doesn't exist")
End If
