如何检查列表框项是否存在目录 [英] how to check if directories exists against listbox items

问题描述

大家好，

我想知道是否有人可以提供帮助.我有一个带有2个列表框的表单，允许用户输入目录路径，然后将其填充到listbox1中.我在表单上有一个按钮，希望能够按该按钮在列表框项目中进行循环操作，并检查目录是否存在.

我以为是这样的:

Hi All,

i was wondering if anyone could assist. i have a form with 2 listbox, that allows user to enter in a directory path that is then populated in to the listbox1. I have a button on the form that i want to be able to press which cycle through the listbox items and checks if the directory exists.

i was thinking it would be something along the lines of :

For Each something In listbox1

if system.io.file.exist(somethinghere2) = false then
      'in second listbox display missing directory
    listbox2.item.add("does not exist " & somethinghere2)
     else
        'if the directory does exist
       'do nothing
end if

   Next

这是出于帮助我完成工作的目的，因此，我不必手动检查用户是否删除了过分的目录....我不是一个程序员，但是任何帮助都是很棒的.

this is for purpose to help me with my job, so i dont have to manually check if users have deleted directories overnite.... im not much of a programmer but any help would be great.

推荐答案

如果要检查目录是否存在，应使用

System.IO.Directory.Exists()函数，如果目录存在，则返回True，否则返回False.

如果要检查文件是否存在，则应使用

System.IO.File.Exists()功能.

如果要遍历目录中的所有文件，则应使用

System.IO.Directory.GetFiles(string path)

查看有关System.IO.Directory的Microsoft文档

If you''re going to check if a directory exists, you should use

System.IO.Directory.Exists() function which returns True if the directory exists and False otherwise.

If you''re going to check if a file exists, you should use

System.IO.File.Exists() function.

If you want to iterate through all files in a directory, you should use

System.IO.Directory.GetFiles(string path)

Check Microsoft''s documentation on System.IO.Directory

有关检查目录是否存在的简单解决方案，请尝试以下简单代码

For a simple solution to check if directory is exist just try this simple code

If Dir("yourdirectory") = "" Then
 '' does not exist
End If

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