blocks|key|1680433|text|伪代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1680434|NewString+=+"";
Loop+through+every+char+of+the+string+(skip+the+first+one)
+++If+char+is+upper-case+('A'-'Z')
+++++NewString+=+NewString+%2B+'+'+%2B+lowercase(char)
+++Else
+++++NewString+=+NewString+%2B+char|code-block|syntax|javascript|1680435|更好的方法可能是使用正则表达式或字符串替换例程(将'X‘替换为’x')|1680436|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Pseudo-code:

<pre><code>NewString = "";
Loop through every char of the string (skip the first one)
 If char is upper-case ('A'-'Z')
 NewString = NewString + ' ' + lowercase(char)
 Else
 NewString = NewString + char
</code></pre>

Better ways can perhaps be done by using regex or by string replacement routines (replace 'X' with ' x')

blocks|key|1465229|text|我使用正则表达式，在每个大写字符前插入一个空格，然后降低所有字符串。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1465230|++++string+spacedString+=+System.Text.RegularExpressions.Regex.Replace(yourString,+"\B([A-Z])",+"+\k");
++++spacedString+=+spacedString.ToLower();|code-block|syntax|javascript|1465231|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I'd use a regex, inserting a space before each upper case character, then lowering all the string.

<pre><code> string spacedString = System.Text.RegularExpressions.Regex.Replace(yourString, "\B([A-Z])", " \k");
 spacedString = spacedString.ToLower();
</code></pre>

blocks|key|1680485|text|给你..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1680486|using+System;
using+System.Collections.Generic;
using+System.Linq;
using+System.Text;

namespace+CamelCaseToString
{
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++Console.WriteLine(CamelCaseToString("ThisIsYourMasterCallingYou"));+++
++++++++}

++++++++private+static+string+CamelCaseToString(string+str)
++++++++{
++++++++++++if+(str+==+null+%7C%7C+str.Length+==+0)
++++++++++++++++return+null;

++++++++++++StringBuilder+retVal+=+new+StringBuilder(32);

++++++++++++retVal.Append(char.ToUpper(str[0]));
++++++++++++for+(int+i+=+1;+i+<+str.Length;+i%2B%2B+)
++++++++++++{
++++++++++++++++if+(char.IsLower(str[i]))
++++++++++++++++{
++++++++++++++++++++retVal.Append(str[i]);
++++++++++++++++}
++++++++++++++++else
++++++++++++++++{
++++++++++++++++++++retVal.Append("+");
++++++++++++++++++++retVal.Append(char.ToLower(str[i]));
++++++++++++++++}
++++++++++++}

++++++++++++return+retVal.ToString();
++++++++}
++++}
}|code-block|syntax|javascript|1680487|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here you go...

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CamelCaseToString
{
 class Program
 {
 static void Main(string[] args)
 {
 Console.WriteLine(CamelCaseToString("ThisIsYourMasterCallingYou")); 
 }

 private static string CamelCaseToString(string str)
 {
 if (str == null || str.Length == 0)
 return null;

 StringBuilder retVal = new StringBuilder(32);

 retVal.Append(char.ToUpper(str[0]));
 for (int i = 1; i &lt; str.Length; i++ )
 {
 if (char.IsLower(str[i]))
 {
 retVal.Append(str[i]);
 }
 else
 {
 retVal.Append(" ");
 retVal.Append(char.ToLower(str[i]));
 }
 }

 return retVal.ToString();
 }
 }
}
</code></pre>

blocks|key|1465303|text|这在JavaScript+(或PHP等)中很容易做到。其中，您可以在replace调用中定义函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1465304|var+camel+=+"AwaitingFeedbackDearMaster";
var+sentence+=+camel.replace(/([A-Z].)/g,+function+(c)+{+return+'+'+%2B+c.toLowerCase();+});
alert(sentence);|code-block|syntax|javascript|1465305|虽然我还没有解决最初的上限问题...:-)|1465306|现在，对于Java解决方案：|1465307|String+ToSentence(String+camel)
{
++if+(camel+==+null)+return+"";+//+Or+null...
++String[]+words+=+camel.split("(?=[A-Z])");
++if+(words+==+null)+return+"";
++if+(words.length+==+1)+return+words[0];
++StringBuilder+sentence+=+new+StringBuilder(camel.length());
++if+(words[0].length()+>+0)+//+Just+in+case+of+camelCase+instead+of+CamelCase
++{
++++sentence.append(words[0]+%2B+"+"+%2B+words[1].toLowerCase());
++}
++else
++{
++++sentence.append(words[1]);
++}
++for+(int+i+=+2;+i+<+words.length;+i%2B%2B)
++{
++++sentence.append("+"+%2B+words[i].toLowerCase());
++}
++return+sentence.toString();
}

System.out.println(ToSentence("AwaitingAFeedbackDearMaster"));
System.out.println(ToSentence(null));
System.out.println(ToSentence(""));
System.out.println(ToSentence("A"));
System.out.println(ToSentence("Aaagh!"));
System.out.println(ToSentence("stackoverflow"));
System.out.println(ToSentence("disableGPS"));
System.out.println(ToSentence("Ahh89Boo"));
System.out.println(ToSentence("ABC"));|1465308|注意在不丢失任何字符的情况下拆分句子的技巧...|1465309|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

It is easy to do in JavaScript (or PHP, etc.) where you can define a function in the replace call:

<pre><code>var camel = "AwaitingFeedbackDearMaster";
var sentence = camel.replace(/([A-Z].)/g, function (c) { return ' ' + c.toLowerCase(); });
alert(sentence);
</code></pre>

Although I haven't solved the initial cap problem... :-)

Now, for the Java solution:

<pre><code>String ToSentence(String camel)
{
 if (camel == null) return ""; // Or null...
 String[] words = camel.split("(?=[A-Z])");
 if (words == null) return "";
 if (words.length == 1) return words[0];
 StringBuilder sentence = new StringBuilder(camel.length());
 if (words[0].length() &gt; 0) // Just in case of camelCase instead of CamelCase
 {
 sentence.append(words[0] + " " + words[1].toLowerCase());
 }
 else
 {
 sentence.append(words[1]);
 }
 for (int i = 2; i &lt; words.length; i++)
 {
 sentence.append(" " + words[i].toLowerCase());
 }
 return sentence.toString();
}

System.out.println(ToSentence("AwaitingAFeedbackDearMaster"));
System.out.println(ToSentence(null));
System.out.println(ToSentence(""));
System.out.println(ToSentence("A"));
System.out.println(ToSentence("Aaagh!"));
System.out.println(ToSentence("stackoverflow"));
System.out.println(ToSentence("disableGPS"));
System.out.println(ToSentence("Ahh89Boo"));
System.out.println(ToSentence("ABC"));
</code></pre>

Note the trick to split the sentence without loosing any character...

blocks|key|1680557|text|下面是我想出的使用正则表达式的基本方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1680558|public+static+string+CamelCaseToSentence(this+string+value)
{
++++var+sb+=+new+StringBuilder();
++++var+firstWord+=+true;

++++foreach+(var+match+in+Regex.Matches(value,+"([A-Z][a-z]%2B)%7C[0-9]%2B"))
++++{
++++++++if+(firstWord)
++++++++{
++++++++++++sb.Append(match.ToString());
++++++++++++firstWord+=+false;
++++++++}
++++++++else
++++++++{
++++++++++++sb.Append("+");
++++++++++++sb.Append(match.ToString().ToLower());
++++++++}
++++}

++++return+sb.ToString();
}|code-block|syntax|javascript|1680559|它还将分离出我没有指定但会很有用的数字。|1680560|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Here's a basic way of doing it that I came up with using Regex

<pre><code>public static string CamelCaseToSentence(this string value)
{
 var sb = new StringBuilder();
 var firstWord = true;

 foreach (var match in Regex.Matches(value, "([A-Z][a-z]+)|[0-9]+"))
 {
 if (firstWord)
 {
 sb.Append(match.ToString());
 firstWord = false;
 }
 else
 {
 sb.Append(" ");
 sb.Append(match.ToString().ToLower());
 }
 }

 return sb.ToString();
}
</code></pre>

It will also split off numbers which I didn't specify but would be useful.

blocks|key|1465415|text|string+camel+=+"MyCamelCaseString";
string+s+=+Regex.Replace(camel,+"([A-Z])",+"+$1").ToLower().Trim();
Console.WriteLine(s.Substring(0,1).ToUpper()+%2B+s.Substring(1));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1465416|编辑:没有注意到你的大小写要求，做了相应的修改。你可以使用matchevaluator来做大小写，但我认为子字符串更简单。您还可以将其包装在第二个regex替换中，其中您可以更改第一个字符|unstyled|1465417|"%5E\w"|1465418|转到上层|1465419|\U+(i+think)|1465420|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>string camel = "MyCamelCaseString";
string s = Regex.Replace(camel, "([A-Z])", " $1").ToLower().Trim();
Console.WriteLine(s.Substring(0,1).ToUpper() + s.Substring(1));
</code></pre>

Edit: didn't notice your casing requirements, modifed accordingly. You could use a matchevaluator to do the casing, but I think a substring is easier. You could also wrap it in a 2nd regex replace where you change the first character

<pre><code>"^\w"
</code></pre>

to upper

<pre><code>\U (i think)
</code></pre>

blocks|key|1680714|text|主要是already+answered+here|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1680715|对可接受答案的小更改，将第二个和后续的大写字母转换为小写，因此更改|1680716|if+(char.IsUpper(text[i]))++++++++++++++++
++++newText.Append('+');++++++++++++
newText.Append(text[i]);|code-block|syntax|javascript|1680717|至|1680718|if+(char.IsUpper(text[i]))++++++++++++++++
{
++++newText.Append('+');++++++++++++
++++newText.Append(char.ToLower(text[i]));
}
else
+++newText.Append(text[i]);|1680719|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/272633/add-spaces-before-capital-letters#272929^0|3|L|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

Mostly <a href="https://stackoverflow.com/questions/272633/add-spaces-before-capital-letters#272929">already answered here</a>

Small chage to the accepted answer, to convert the second and subsequent Capitalised letters to lower case, so change

<pre><code>if (char.IsUpper(text[i])) 
 newText.Append(' '); 
newText.Append(text[i]);
</code></pre>

to 

<pre><code>if (char.IsUpper(text[i])) 
{
 newText.Append(' '); 
 newText.Append(char.ToLower(text[i]));
}
else
 newText.Append(text[i]);
</code></pre>

blocks|key|1680764|text|public+static+string+ToSentenceCase(this+string+str)
{
++++return+Regex.Replace(str,+"[a-z][A-Z]",+m+=>+m.Value[0]+%2B+"+"+%2B+char.ToLower(m.Value[1]));
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1680765|在2015年以后的visual+studio版本中，您可以执行以下操作|unstyled|1680766|public+static+string+ToSentenceCase(this+string+str)
{
++++return+Regex.Replace(str,+"[a-z][A-Z]",+m+=>+$"{m.Value[0]}+{char.ToLower(m.Value[1])}");
}|1680767|基于：Converting+Pascal+case+to+sentences+using+regular+expression|offset|length|1680768|entityMap|0|LINK|mutability|MUTABLE|url|http://www.vojkovic.net/converting-pascal-case-to-sentences-using-regular-expression^0|0|0|0|3|1O|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|F|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

<pre><code>public static string ToSentenceCase(this string str)
{
 return Regex.Replace(str, "[a-z][A-Z]", m =&gt; m.Value[0] + " " + char.ToLower(m.Value[1]));
}
</code></pre>

In versions of visual studio after 2015, you can do

<pre><code>public static string ToSentenceCase(this string str)
{
 return Regex.Replace(str, "[a-z][A-Z]", m =&gt; $"{m.Value[0]} {char.ToLower(m.Value[1])}");
}
</code></pre>

Based on: <a href="http://www.vojkovic.net/converting-pascal-case-to-sentences-using-regular-expression" rel="noreferrer">Converting Pascal case to sentences using regular expression</a>

blocks|key|1680840|text|同时适用于UpperCamel和lowerCamel的xquery解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1680841|输出句子大小写(仅第一个单词的第一个字符大写)：|1680842|declare+function+content:sentenceCase($string)
{
let+$firstCharacter+:=+substring($string,+1,+1)
let+$remainingCharacters+:=+substring-after($string,+$firstCharacter)
return
concat(upper-case($firstCharacter),lower-case(replace($remainingCharacters,+'([A-Z])',+'+$1')))
};|code-block|syntax|javascript|1680843|输出标题大小写(每个单词的第一个字符大写)：|1680844|declare+function+content:titleCase($string)
{
let+$firstCharacter+:=+substring($string,+1,+1)
let+$remainingCharacters+:=+substring-after($string,+$firstCharacter)
return
concat(upper-case($firstCharacter),replace($remainingCharacters,+'([A-Z])',+'+$1'))
};|1680845|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

An xquery solution that works for both UpperCamel and lowerCamel case:

To output sentence case (only the first character of the first word is capitalized):

<pre><code>declare function content:sentenceCase($string)
{
let $firstCharacter := substring($string, 1, 1)
let $remainingCharacters := substring-after($string, $firstCharacter)
return
concat(upper-case($firstCharacter),lower-case(replace($remainingCharacters, '([A-Z])', ' $1')))
};
</code></pre>

To output title case (first character of each word capitalized):

<pre><code>declare function content:titleCase($string)
{
let $firstCharacter := substring($string, 1, 1)
let $remainingCharacters := substring-after($string, $firstCharacter)
return
concat(upper-case($firstCharacter),replace($remainingCharacters, '([A-Z])', ' $1'))
};
</code></pre>

blocks|key|1465631|text|在MvcContrib源码中找到了这个，这里似乎还没有提到。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1465632|return+Regex.Replace(input,+"([A-Z])",+"+$1",+RegexOptions.Compiled).Trim();|code-block|syntax|javascript|1465633|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Found this in the MvcContrib source, doesn't seem to be mentioned here yet.

<pre><code>return Regex.Replace(input, "([A-Z])", " $1", RegexOptions.Compiled).Trim();
</code></pre>

blocks|key|1680955|text|我发现自己也在做类似的事情，我很高兴有一个出发点来讨论这个问题。这是我的解决方案，在控制台应用程序的上下文中作为string类的扩展方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1680956|using+System;
using+System.Text;

namespace+ConsoleApplication1
{
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++string+piratese+=+"avastTharMatey";
++++++++++++string+ivyese+=+"CheerioPipPip";

++++++++++++Console.WriteLine("{0}\n{1}\n",+piratese.CamelCaseToString(),+ivyese.CamelCaseToString());
++++++++++++Console.WriteLine("For+Pete\'s+sake,+man,+hit+ENTER!");
++++++++++++string+strExit+=+Console.ReadLine();
++++++++}

++++}

++++public+static+class+StringExtension
++++{
++++++++public+static+string+CamelCaseToString(this+string+str)
++++++++{
++++++++++++StringBuilder+retVal+=+new+StringBuilder(32);

++++++++++++if+(!string.IsNullOrEmpty(str))
++++++++++++{
++++++++++++++++string+strTrimmed+=+str.Trim();

++++++++++++++++if+(!string.IsNullOrEmpty(strTrimmed))
++++++++++++++++{
++++++++++++++++++++retVal.Append(char.ToUpper(strTrimmed[0]));

++++++++++++++++++++if+(strTrimmed.Length+>+1)
++++++++++++++++++++{
++++++++++++++++++++++++for+(int+i+=+1;+i+<+strTrimmed.Length;+i%2B%2B)
++++++++++++++++++++++++{
++++++++++++++++++++++++++++if+(char.IsUpper(strTrimmed[i]))+retVal.Append("+");

++++++++++++++++++++++++++++retVal.Append(char.ToLower(strTrimmed[i]));
++++++++++++++++++++++++}
++++++++++++++++++++}
++++++++++++++++}
++++++++++++}
++++++++++++return+retVal.ToString();
++++++++}
++++}
}|code-block|syntax|javascript|1680957|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Found myself doing something similar, and I appreciate having a point-of-departure with this discussion. This is my solution, placed as an extension method to the string class in the context of a console application.

<pre><code>using System;
using System.Text;

namespace ConsoleApplication1
{
 class Program
 {
 static void Main(string[] args)
 {
 string piratese = "avastTharMatey";
 string ivyese = "CheerioPipPip";

 Console.WriteLine("{0}\n{1}\n", piratese.CamelCaseToString(), ivyese.CamelCaseToString());
 Console.WriteLine("For Pete\'s sake, man, hit ENTER!");
 string strExit = Console.ReadLine();
 }

 }

 public static class StringExtension
 {
 public static string CamelCaseToString(this string str)
 {
 StringBuilder retVal = new StringBuilder(32);

 if (!string.IsNullOrEmpty(str))
 {
 string strTrimmed = str.Trim();

 if (!string.IsNullOrEmpty(strTrimmed))
 {
 retVal.Append(char.ToUpper(strTrimmed[0]));

 if (strTrimmed.Length &gt; 1)
 {
 for (int i = 1; i &lt; strTrimmed.Length; i++)
 {
 if (char.IsUpper(strTrimmed[i])) retVal.Append(" ");

 retVal.Append(char.ToLower(strTrimmed[i]));
 }
 }
 }
 }
 return retVal.ToString();
 }
 }
}
</code></pre>

blocks|key|1681080|text|前面的大多数答案都将首字母缩写和数字分开，在每个字符前面添加一个空格。我希望缩写和数字保持在一起，所以我有一个简单的状态机，它在每次输入从一个状态转换到另一个状态时发出一个空格。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1681081|++++///+<summary>
++++///+Add+a+space+before+any+capitalized+letter+(but+not+for+a+run+of+capitals+or+numbers)
++++///+</summary>
++++internal+static+string+FromCamelCaseToSentence(string+input)
++++{
++++++++if+(string.IsNullOrEmpty(input))+return+String.Empty;

++++++++var+sb+=+new+StringBuilder();
++++++++bool+upper+=+true;

++++++++for+(var+i+=+0;+i+<+input.Length;+i%2B%2B)
++++++++{
++++++++++++bool+isUpperOrDigit+=+char.IsUpper(input[i])+%7C%7C+char.IsDigit(input[i]);
++++++++++++//+any+time+we+transition+to+upper+or+digits,+it's+a+new+word
++++++++++++if+(!upper+&&+isUpperOrDigit)
++++++++++++{
++++++++++++++++sb.Append('+');
++++++++++++}
++++++++++++sb.Append(input[i]);
++++++++++++upper+=+isUpperOrDigit;
++++++++}

++++++++return+sb.ToString();
++++}|code-block|syntax|javascript|1681082|下面是一些测试：|1681083|++++[TestCase(null,+ExpectedResult+=+"")]
++++[TestCase("",+ExpectedResult+=+"")]
++++[TestCase("ABC",+ExpectedResult+=+"ABC")]
++++[TestCase("abc",+ExpectedResult+=+"abc")]
++++[TestCase("camelCase",+ExpectedResult+=+"camel+Case")]
++++[TestCase("PascalCase",+ExpectedResult+=+"Pascal+Case")]
++++[TestCase("Pascal123",+ExpectedResult+=+"Pascal+123")]
++++[TestCase("CustomerID",+ExpectedResult+=+"Customer+ID")]
++++[TestCase("CustomABC123",+ExpectedResult+=+"Custom+ABC123")]
++++public+string+CanSplitCamelCase(string+input)
++++{
++++++++return+FromCamelCaseToSentence(input);
++++}|1681084|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Most of the preceding answers split acronyms and numbers, adding a space in front of each character. I wanted acronyms and numbers to be kept together so I have a simple state machine that emits a space every time the input transitions from one state to the other.

<pre><code> /// &lt;summary&gt;
 /// Add a space before any capitalized letter (but not for a run of capitals or numbers)
 /// &lt;/summary&gt;
 internal static string FromCamelCaseToSentence(string input)
 {
 if (string.IsNullOrEmpty(input)) return String.Empty;

 var sb = new StringBuilder();
 bool upper = true;

 for (var i = 0; i &lt; input.Length; i++)
 {
 bool isUpperOrDigit = char.IsUpper(input[i]) || char.IsDigit(input[i]);
 // any time we transition to upper or digits, it's a new word
 if (!upper &amp;&amp; isUpperOrDigit)
 {
 sb.Append(' ');
 }
 sb.Append(input[i]);
 upper = isUpperOrDigit;
 }

 return sb.ToString();
 }
</code></pre>

And here's some tests:

<pre><code> [TestCase(null, ExpectedResult = "")]
 [TestCase("", ExpectedResult = "")]
 [TestCase("ABC", ExpectedResult = "ABC")]
 [TestCase("abc", ExpectedResult = "abc")]
 [TestCase("camelCase", ExpectedResult = "camel Case")]
 [TestCase("PascalCase", ExpectedResult = "Pascal Case")]
 [TestCase("Pascal123", ExpectedResult = "Pascal 123")]
 [TestCase("CustomerID", ExpectedResult = "Customer ID")]
 [TestCase("CustomABC123", ExpectedResult = "Custom ABC123")]
 public string CanSplitCamelCase(string input)
 {
 return FromCamelCaseToSentence(input);
 }
</code></pre>

blocks|key|1681128|text|下面是我的实现。这是我在避免为缩写创建空格的情况下获得的最快速度。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1681129|public+static+string+PascalCaseToSentence(string+input)
++++{
++++++++if+(string.IsNullOrEmpty(input)+%7C%7C+input.Length+<+2)
++++++++++++return+input;

++++++++var+sb+=+new+char[input.Length+%2B+((input.Length+%2B+1)+/+2)];
++++++++var+len+=+0;
++++++++var+lastIsLower+=+false;
++++++++for+(int+i+=+0;+i+<+input.Length;+i%2B%2B)
++++++++{
++++++++++++var+current+=+input[i];
++++++++++++if+(current+<+97)
++++++++++++{
++++++++++++++++if+(lastIsLower)
++++++++++++++++{
++++++++++++++++++++sb[len]+=+'+';
++++++++++++++++++++len%2B%2B;
++++++++++++++++}
++++++++++++++++lastIsLower+=+false;
++++++++++++}
++++++++++++else
++++++++++++{
++++++++++++++++lastIsLower+=+true;
++++++++++++}
++++++++++++sb[len]+=+current;

++++++++++++len%2B%2B;
++++++++}

++++++++return+new+string(sb,+0,+len);
++++}|code-block|syntax|javascript|1681130|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is my implementation. This is the fastest that I got while avoiding creating spaces for abbreviations.
<pre><code>public static string PascalCaseToSentence(string input)
 {
 if (string.IsNullOrEmpty(input) || input.Length &lt; 2)
 return input;

 var sb = new char[input.Length + ((input.Length + 1) / 2)];
 var len = 0;
 var lastIsLower = false;
 for (int i = 0; i &lt; input.Length; i++)
 {
 var current = input[i];
 if (current &lt; 97)
 {
 if (lastIsLower)
 {
 sb[len] = ' ';
 len++;
 }
 lastIsLower = false;
 }
 else
 {
 lastIsLower = true;
 }
 sb[len] = current;

 len++;
 }

 return new string(sb, 0, len);
 }
</code></pre>

What is the best way to convert from Pascal Case (upper Camel Case) to a sentence.

For example starting with

<pre><code>"AwaitingFeedback"
</code></pre>

and converting that to

<pre><code>"Awaiting feedback"
</code></pre>

C# preferable but I could convert it from Java or similar.

Best way to convert Pascal Case to a sentence

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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从Pascal大小写(大写驼峰大小写)转换成句子的最佳方法是什么？例如，以"AwaitingFeedback"并将其转换为"Awaiting feedback"最好是C#，但我可以把它从Java或类似的语言转换过来。

问将Pascal大小写转换为句子的最佳方法
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