获取2个字符串之间的字符 [英] Get string between 2 strings
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问题描述
我想在两个字符串之间获取字符串。我将用于网址
例如
I want go get string between two strings. I will use for url
For example
dim main as string = "kgjhnbkfm glnvfkdşlv http://ghkng.xfg/ngbf.png gvlkdjg"
dim before as string="http://"
dim after as string = ".png"
dim useless as string='I need to get between theese strings (before and after)
dim urlfinal as string=before+useless+after
推荐答案
使用正则表达式:
Use a Regex:
Dim regex As Regex = New Regex( _
"(?<=http://).*?(?=\.png)", _
RegexOptions.Multiline _
Or RegexOptions.CultureInvariant _
Or RegexOptions.IgnorePatternWhitespace _
Or RegexOptions.Compiled _
)
Dim InputText As String = "kgjhnbkfm glnvfkdşlv http://ghkng.xfg/ngbf.png gvlkdjg"
Dim m As Match = regex.Match(InputText)
If (m.Success) Then
Console.WriteLine(m.Value)
End If
您可以使用rexex:
Expresso - 用于构建和测试正则表达式的工具 [ ^ ]
制作预先安装的部分。
You could use rexex for this:
Expresso - A Tool for Building and Testing Regular Expressions[^]
MAtch the part that is preseded by and followed by.
我建议你看看正则表达式 [ ^ ]。
一个快速的C#解决方案(也许不是bes因为我的RegExp不如它应该的那么好):
I would suggest you look at regular expressions[^].
A quick C# solution (maybe not the best as my RegExp is not as good as it should be):
string main = "kgjhnbkfm glnvfkdşlv http://ghkng.xfg/ngbf.png gvlkdjg";
Regex pattern = new Regex("(.*)http://(?<urlfinal>(.*)).png(.*)");
Match match = pattern.Match(main);
string urlFinal = "http://" + match.Groups["urlfinal"].Value + ".png";
</urlfinal>
应该可以轻松转换为VB.NET。
It should be easily convertible to VB.NET.
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