在小写和大写之间添加间距？

Question

我希望在字符串中包含大写字符或下划线时添加空格.

我该怎么做呢？

例1

输入

ThisIsAnInputString

输出(结果)

This Is An Input String

例2

输入

This_Is_An_Input_String

输出(结果)

This Is An Input String

Answer 1

您可以使用与小写字符匹配的正则表达式,后跟大写字符,并在以下之间使用可选的下划线:

string output = Regex.Replace(input, "([a-z])_?([A-Z])", "$1 $2");

您可能还想使用它来处理单个字符单词:

string output = Regex.Replace(input, "(?<!^)_?([A-Z])", " $1");

Answer 2

下划线：

string inputString = "This_Is_An_Input_String";
string resultString = inputString.Replace('_', ' ');

首都：

string inputString = "ThisIsAnInputString";
//this will put a space before all capitals that are preceded by a lowercase character
string resultString = Regex.Replace(inputString, @"([a-z])([A-Z])", "$1 $2");

Answer 3

对于输入类型：ThisIsAnInputString

        string input1 = "ThisIsAnInputString";
        StringBuilder builder = new StringBuilder();

        foreach (char c in input1)
        {
            if (Char.IsUpper(c))
            {
                builder.Append(' ');
                builder.Append(c);
            }
            else
            {
                builder.Append(c);
            }
        }

        string output = builder.ToString().Trim();

对于输入类型：This_Is_An_Input_String

string input2 = "This_Is_An_Input_String";
string output = Regex.Replace(input2, "_([A-Z])", " $1");