VB/.Net如果文件存在布尔值 [英] VB/.Net If File Exists Boolean

问题描述

大家好，

我正在尝试创建一个函数，该函数将监视新文件的目录.文件名长度为20个字符，包括日期和随机性.

我尝试过类似的操作:
DimstrLookupPath as string =("C:\ somefolder \ * _ 0513 *")
子ChcekForFile()
执行直到System.IO.File.Exists(strLookupPath)


但这不起作用-如果我不知道文件的全名，还有其他想法吗?

TIA

Edward

Hi All,

I am trying to create a function that will watch a dir for a new file. The file names are 20 char long, including date, and randomness.

I tried something like:
DimstrLookupPath as string = ("C:\somefolder\*_0513*")
sub ChcekForFile()
Do until System.IO.File.Exists(strLookupPath)


but this doesn''t work - any other thoughts if I don''t know the full name of the file?

TIA

Edward

推荐答案

您要FileSystemWatcher，但要注意:

FileSystemWatcher-纯混沌(第1部分，共2部分) [ FileSystemWatcher-纯混沌(第2部分，共2部分) [

You want FileSystemWatcher, but beware:

FileSystemWatcher - Pure Chaos (Part 1 of 2)[^]

FileSystemWatcher - Pure Chaos (Part 2 of 2)[^]

How it reacts depends on what application is placing the file in the folder (see the Part 2 article above).

您需要执行以下操作:

You need to do something like:

Dim files As String() = Directory.GetFiles("C:\somefolder\", "*_0513*")

这样，您可以使用通配符来执行搜索.

That way you can use wildcards to perform your searches.

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