自定义格式字符串 [英] Custom Format String

问题描述

快速问题，我想实现一种自定义格式字符串，例如日期/时间对象.基本上，我只需要它来找到％P并将其替换为某些内容.不过，如果我可以轻松地将其扩展为其他功能，那就太好了.我在MSDN上找到了一篇文章，但并未对此发表任何评论.因此，如果有人可以向我提供样本或为我指明正确的方向，我将为您提供帮助！

谢谢！
M

Quick Question, I have something that I would like to implement a custom format string on like the Date/Time Object one. Basically, I just need it to find %P and replace it with something. Although, it would be great if I could easily expand it for other things. I found an article on MSDN but, I didn''t make heads or tales of it. So if anyone could provide me with a sample or point me in the right direction, I''d ''preciate it!

Thanks!
M

推荐答案

使用正则表达式:

Use a Regex:

Public Dim regex As Regex = New Regex( _
      "(%P)", _
    RegexOptions.IgnoreCase _
    Or RegexOptions.CultureInvariant _
    Or RegexOptions.IgnorePatternWhitespace _
    Or RegexOptions.Compiled _
    )
Public Dim regexReplace As String = _
      "percentP"

Dim result As String = regex.Replace(InputText,regexReplace)

看看 Expresso [ ^ ]-创建，检查和解释正则表达式字符串.而且它是免费的.

Have a look at Expresso [^]- creates, examines and explains regex strings. And it''s free.

虽然Griff的解决方案是合适的，但我不是Regex的忠实拥护者，所以我会这样处理:

While Griff''s solution is appropriate, I''m not a big fan of Regex, so I would approach it this way:

myString = myString.Replace("%P", replacementString);

那是很多代码，比Regex快很多，并且消耗更少的资源.

That''s a LOT less code, a LOT faster than Regex will ever be, and consumes fewer resources besides.

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