.NET方法将字符串判的情况下转换

问题描述

我在寻找到一个文本字符串，它是大写的，以SentenceCase转换功能。所有的例子我能找到把文成首字母大写。

I'm looking for a function to convert a string of text that is in UpperCase to SentenceCase. All the examples I can find turn the text into TitleCase.

句的情况下在一般意义上
  描述的方式，大写
  在一个句子中使用。句子
  案例还描述标准
  英语句子的资本，
  即句子的第一个字母
  是大写的，其余为
  小写（除非要求
  资本的具体原因，
  例如专有名词，首字母缩写，等等）。

任何人都可以点我在脚本或功能SentenceCase的方向是什么？

Can anyone point me in the direction of a script or function for SentenceCase?

推荐答案

有没有什么内置于.NET - 不过，这是其中的情况下，常规的前pression处理实际可能效果较好之一。我会通过首先把整个字符串为小写开始，然后，作为第一近似值，你可以使用正则表达式来找到像所有序列[AZ] \\。\\ S +（。），并使用 ToUpper的（）来捕获组转换为大写。在正则表达式类有一个重载的替换（），它接受方法 MatchEvaluator 委托，它允许您定义如何更换匹配的值。

There isn't anything built in to .NET - however, this is one of those cases where regular expression processing actually may work well. I would start by first converting the entire string to lower case, and then, as a first approximation, you could use regex to find all sequences like [a-z]\.\s+(.), and use ToUpper() to convert the captured group to upper case. The RegEx class has an overloaded Replace() method which accepts a MatchEvaluator delegate, which allows you to define how to replace the matched value.

下面是这个在工作中code例如：

Here's a code example of this at work:

var sourcestring = "THIS IS A GROUP. OF CAPITALIZED. LETTERS.";
// start by converting entire string to lower case
var lowerCase = sourcestring.ToLower();
// matches the first sentence of a string, as well as subsequent sentences
var r = new Regex(@"(^[a-z])|\.\s+(.)", RegexOptions.ExplicitCapture);
// MatchEvaluator delegate defines replacement of setence starts to uppercase
var result = r.Replace(lowerCase, s => s.Value.ToUpper());

// result is: "This is a group. Of uncapitalized. Letters."

这可以在许多不同的方式加以完善，以更好地匹配更广泛的各种句型（不只是那些在信+周期结束）。

This could be refined in a number of different ways to better match a broader variety of sentence patterns (not just those ending in a letter+period).

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