按最后一次出现拆分字符串 [英] Split String by last occurence

问题描述

我有一个这样的字符串:

I have a String like this:

www.myserver.net/Files/Pictures/2014/MyImage.jpg

www.myserver.net/Files/Pictures/2014/MyImage.jpg

我想拆分它，所以我在最后一次出现/后得到子字符串.这意味着我喜欢得到 MyImage.jpg我是这样试的:

And I want to split it, so I get the Substring after the last occurence of /. Which means I like to get MyImage.jpg I tried it like this:

  MsgBox(URL.Substring(URL.LastIndexOf("/"), URL.Length - 1))

但这行不通.有人可以帮助我如何在 VB.Net 中做到这一点吗?C#也可以，明白逻辑后，我可以自己转换了.

But that wont work. Can someone help me out how to do this in VB.Net? C# is also okay, after I've understood the logic, I can convert it myself.

推荐答案

使用 System.IO.Path.GetFileName:

Dim path = "www.myserver.net/Files/Pictures/2014/MyImage.jpg"
Dim filename = System.IO.Path.GetFileName(path) ' MyImage.jpg

为了完整起见，您还可以使用 String.Split 或 String.Substring:

For the sake of completeness, you could also use String.Split or String.Substring:

filename = path.Split("/"c).Last()
' or 
Dim lastIndex = path.LastIndexOf("/")
If lastIndex >= 0 Then
    fileName = path.Substring(lastIndex + 1)
End If

但它更容易出错且可读性较差.

But it is more error-prone and less readable.

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