替换为正则表达式 [英] Replace with regex

问题描述

嗨！



我正在尝试使用正则表达式替换一些文本。我不确定它的相关性，但文本来自vb.net中的Treeview控件。我使用以下基本正则表达式：< creationDate>（。*？）< / creationDate>哪个很棒！



这里是子：



Dim nNode As TreeNode

Dim sPattern As String ="<" &安培; sTag& "><（*）; /" &安培; sTag& ">"

Dim rx As New Regex（sPattern）

Dim m As Match





每个nNode在nParent.Nodes中

m = rx.Match（nNode.Text）

如果m.Success = True那么

rx。替换（nNode.Text，sPattern，sText）

退出Sub

结束如果

下一个





所以正则表达式找到我正在寻找的模式。但替换不起作用。我注意到rx.Replace函数返回一个字符串。当我从rx.Replace返回一个值时 - 它只是sText值。我希望能够保留标签值。我知道我可以使用蛮力方法解决这个问题，但我希望使用正则表达式的优雅。

谢谢！

解决方案

你可以做的就是将sPattern字符串修改为：Dim sPattern As String ="（<"& sTag&" ;>）（。*？）（< /"& sTag&">）"
从那里你可以像这样修改sText值："

1" + sText +"

3"

有关此方法的更多信息，请访问： http://www.javascriptkit.com/javatutors/re3.shtml 结果

Hi!

I am trying to replace a bit of text using a regex.  Im not sure its relevant but the text is from a Treeview control in vb.net.  I am using the following basic regex: <creationDate>(.*?)</creationDate> which works great!

here is the sub:

Dim nNode As TreeNode
        Dim sPattern As String = "<" & sTag & ">(.*?)</" & sTag & ">"
        Dim rx As New Regex(sPattern)
        Dim m As Match


        For Each nNode In nParent.Nodes
            m = rx.Match(nNode.Text)
            If m.Success = True Then
                rx.Replace(nNode.Text, sPattern, sText)
                Exit Sub
            End If
        Next


So the regex works as far as finding the pattern Im looking for.  But the replace isn't working.  I noticed that the rx.Replace function returns a string.  When I return a value from the rx.Replace -  its the sText value only.  I want to be able to keep the tag values.  I know I can solve this using a brute force method, but I was hoping to use the regex elegance.

thanks!

解决方案

On thing you could do is modify the sPattern string to: Dim sPattern As String = "(<" & sTag & ">)(.*?)(</" & sTag & ">)"
From there you can  modify the sText value like so: "

1"+sText+"

3"

More information on this method can be found here: http://www.javascriptkit.com/javatutors/re3.shtml

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