替换为正则表达式

本文介绍了替换为正则表达式的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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： www.javascriptkit/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.  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: www.javascriptkit/javatutors/re3.shtml