c#处理空白字符
空白字符是指在屏幕不会显示出来的字符(如空格,制表符tab,回车换行等)。空格、制表符、换行符、回车、换页垂直制表符和换行符称为 “空白字符”,因为它们为与间距单词和行在打印的页 )的用途可以读取更加轻松。 标记分隔 (一定) 由空白字符和由其他标记,例如运算符和标点。在分析代码时, C 编译器忽略空白字符,除非使用它们作为分隔符或作为字符常数或字符串文本元素。使用空白字符使程序更易于阅读。请注意编译器还将注释作为空白。
下面贴一段c#处理空白字符的代码:
public static class TypeExtensions { // The Trim method only trims 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x0085, 0x2028, and 0x2029. // This array adds in control characters. public static readonly char[] WhiteSpaceChars = new char[] { (char)0x00, (char)0x01, (char)0x02, (char)0x03, (char)0x04, (char)0x05, (char)0x06, (char)0x07, (char)0x08, (char)0x09, (char)0x0a, (char)0x0b, (char)0x0c, (char)0x0d, (char)0x0e, (char)0x0f, (char)0x10, (char)0x11, (char)0x12, (char)0x13, (char)0x14, (char)0x15, (char)0x16, (char)0x17, (char)0x18, (char)0x19, (char)0x20, (char)0x1a, (char)0x1b, (char)0x1c, (char)0x1d, (char)0x1e, (char)0x1f, (char)0x7f, (char)0x85, (char)0x2028, (char)0x2029 }; /// <summary> /// Gets a value that indicates whether or not the collection is empty. /// </summary> public static bool IsNullOrBlank(this string s) { if (s == null || s.Trim(WhiteSpaceChars).Length == 0) { return true; } return false; } public static bool NotNullOrBlank(this string s) { if (s == null || s.Trim(WhiteSpaceChars).Length == 0) { return false; } return true; } }
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