如何在2个不同的字符串中定界/提取字符串的一部分. [英] How to delimit / extract part of a string within 2 different strings.

问题描述

我想提取第一个单词"，它实际上是要解析为另一种方法的主机名.我目前对其进行了硬编码.无论如何，要对其进行软编码以在"//"和&"之间获取数据. "/".使用VB.NET谢谢！.

Hi I want to extract the first "word" which is actually a host name to parse into another method. I currently hard coded it. Is there anyway to soft code it to take data between "//" & "/". Using VB.NET thanks!.

Dim s As String
Dim a As String
Dim f As String
For Each s In readText
    If s.Trim.StartsWith("#") Then
        SourceTextBox.Text = s.TrimStart("#")
        s = s.TrimStart("#")
        f = s.Substring(2)
        Dim j As Integer = f.IndexOf("/")
        a = f.Substring(0, j)
    End if

    If s.Trim.StartsWith("!") Then
        TargetTextBox.Text = s.TrimStart("!")
        s = s.TrimStart("!")
        f = s.Substring(2)
        Dim j As Integer = f.IndexOf("/")
        a = f.Substring(0, j)

    End If

这是文本文件

This is the text file

#//ASUS-PC/Users/Username/Desktop/Rays
!//DELL-PC/Users/Username/Desktop/Advan

所以我的输出是字符串"a"是
华硕PC
戴尔PC

但是我想对其进行软编码以更好地进行错误检查.由于目前我从每个行的开头开始对其进行硬编码.

So my output is string "a" is
ASUS-PC
DELL-PC

But I want to soft-code it for better error checking. Since currently I hard-code it to count from the start of each line.

推荐答案

是这样的:

It''s this:

static string ExtractComputerName(string fileName) {
   string[] parts = fileName.Split(
      new char[] { System.IO.Path.PathSeparator },
      System.StringSplitOptions.RemoveEmptyEntries);
   return parts[0]; 
}

注意:由于System.IO.Path.PathSeparator，即使"\"也没有硬编码.

请参阅:
http://msdn.microsoft.com/en-us/library/system. io.path.pathseparator.aspx [ ^ ]，
http://msdn.microsoft.com/en-us/library/system.string. split.aspx [^ ]，
http://msdn.microsoft.com/en-us/library/ms131448.aspx [ ^ ]，
http://msdn.microsoft.com/en-us/library/system.stringsplitoptions.aspx [^ ].

下次，请尝试更全面地探索MSDN，以找到可以帮助您的所有内容-这不是火箭手术. :-)

—SA

Pay attention: even "\" was not hard-coded, thanks to System.IO.Path.PathSeparator.

Please see:
http://msdn.microsoft.com/en-us/library/system.io.path.pathseparator.aspx[^],
http://msdn.microsoft.com/en-us/library/system.string.split.aspx[^],
http://msdn.microsoft.com/en-us/library/ms131448.aspx[^],
http://msdn.microsoft.com/en-us/library/system.stringsplitoptions.aspx[^].

Next time, try to explore MSDN more thoroughly, to find all what can help you — it''s not rocket surgery. :-)

—SA

尝试一下，

try this,

Dim Result As string=""
Dim str = "#//ASUS-PC/Users/Username/Desktop/Rays"
Dim doubleSlashInd = str.IndexOf("//") + 2
Dim FirstSingleSlashAfterDoubleInd = str.IndexOf("/", doubleSlashInd)
Result = str.Substring(doubleslashInd, FirstSingleSlashAfterDoubleInd - doubleslashInd)
'result= asus-pc   same way it will give result for dell-pc

祝您编码愉快！
:)

Happy Coding!
:)

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