查找以...开头的最新文件 [英] Find newest file starting with ...

问题描述

嗨大家好，

我有一个包含数千个PDF的目录。如果客户ID，所有这些都有一个文件名前缀。 ABC123_0001.pdf，ABC123_0002.pdf .... XYZ123_0001.pdf，XYZ132_0002。

I have a directory with thousands of PDFs. All of which have a filename prefix if the customer ID. ABC123_0001.pdf, ABC123_0002.pdf....XYZ123_0001.pdf, XYZ132_0002.

我需要能够在目录中找到特定客户的最新文件。 

I need to be able to locate the newest file in the directory for a particular customer. 

所以说客户ID是MAR123，最新文件是MAR123_0059，然后我想使用客户ID作为参数来获取最新文件。 

So say the customer ID was MAR123 and the newest file was MAR123_0059, then I want to use the customer ID as an argument to get the most recent file. 

不知道从哪里开始。

任何想法???

John

jppnn

推荐答案

我的文件在目录，然后您可以将所有文件名加载到一个数组

I the files are in a directory, then you can load all the file names into an array

https://docs.microsoft.com/en-us/dotnet/api/system.io.directory.getfiles？ view = netframework-4.7.2

https://docs.microsoft.com/en-us/dotnet/api/system.io.directory.getfiles?view=netframework-4.7.2

然后你可以使用Linq Contains（），StartsWith（）和EndsWith（）函数。  

Then you can use Linq Contains(), StartsWith() and EndsWith() functions.  

http://www.dotnetlearners.com/linq/linq-to-string-array-with-example.aspx

http://www.dotnetlearners.com/linq/linq-to-string-array-with-example.aspx

It可能会让你进入球场。 

It may get you in the ballpark. 

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