如何檢查文件是否存在？

Question

我想檢查一個文件是否存在，如果存在，我想打開它並讀取第一行，

如果文件不存在或文件沒有內容，那麼我想要默默地失敗，不讓任何人知道發生了錯誤。

Answer 1

開始與此：

Set fso = CreateObject("Scripting.FileSystemObject") 
If (fso.FileExists(path)) Then 
    msg = path & " exists." 
Else 
    msg = path & " doesn't exist." 
End If 

從documentation服用。

Answer 2

現有文件夾，將FILEEXISTS

失敗

Function FileExists(strFileName) 
' Check if a file exists - returns True or False 

使用代替或補充：

Function FolderExists(strFolderPath) 
' Check if a path exists 

Answer 3

對於任何人誰是尋找一種方式來觀看特定的文件在VBS存在：

Function bIsFileDownloaded(strPath, timeout) 
    Dim FSO, fileIsDownloaded 
    set FSO = CreateObject("Scripting.FileSystemObject") 
    fileIsDownloaded = false 
    limit = DateAdd("s", timeout, Now) 
    Do While Now < limit 
    If FSO.FileExists(strPath) Then : fileIsDownloaded = True : Exit Do : End If 
    WScript.Sleep 1000  
    Loop 
    Set FSO = Nothing 
    bIsFileDownloaded = fileIsDownloaded 
End Function 

用法：

FileName = "C:\test.txt" 
fileIsDownloaded = bIsFileDownloaded(FileName, 5) ' keep watching for 5 seconds 

If fileIsDownloaded Then 
    WScript.Echo Now & " File is Downloaded: " & FileName 
Else 
    WScript.Echo Now & " Timeout, file not found: " & FileName 
End If