浅析如何去除Strings中的C#空格

你或许知道你能使用String.Trim方法去除字符串的头和尾的空格,不幸运的是. 这个Trim方法不能去除字符串中间的C#空格。

string text = "  My test\nstring\r\n is\t quite long  ";
 string trim = text.Trim();

这个'trim' 字符串将会是:

"My test\nstring\r\n is\t quite long"  (31 characters)

另一个清除C#空格方法是使用 String.Replace 方法, 但是这需要你通过调用多个方法来去除个别C#空格:

string trim = text.Replace( " ", "" );
trim = trim.Replace( "\r", "" );
trim = trim.Replace( "\n", "" );
trim = trim.Replace( "\t", "" );

这里最好的方法就是使用正则表达式.你能使用Regex.Replace方法, 它将所有匹配的替换为指定的字符.在这个例子中,使用正则表达式匹配符"\s",它将匹配任何空格包含在这个字符串里C#空格, tab字符, 换行符和新行(newline).

string trim = Regex.Replace( text, @"\s", "" );

这个'trim' 字符串将会是:

"Myteststringisquitelong"  (23 characters)

本文来自Lucky Jack的博客园文章《如何去除C#Strings中的空格? 》

附

C#去除HTML标签方法：

public static string ExecRepaceHTML(string Htmlstring) 

{ 

Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);

 Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);

 Htmlstring = Regex.Replace(Htmlstring, @"<!--.*\n", "", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);

 Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);

 Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);

 Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);

 Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase); 

Htmlstring = Regex.Replace(Htmlstring, @"\s", ""); Htmlstring.Replace("<", ""); Htmlstring.Replace(">", "");

 Htmlstring.Replace("\r\n", ""); 

Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

 return Htmlstring;

 }