C#_字符串的操作

   1:  using System;

   2:  using System.Collections.Generic;

   3:  using System.Linq;

   4:  using System.Text;

   5:  using System.Threading.Tasks;

   6:   

   7:  namespace FunWithStrings

   8:  {

   9:      class Program

  10:      {

  11:          //基本操作

  12:          static void BasicStringFunctionality()

  13:          {

  14:              Console.WriteLine("Basic String Functionality:");

  15:              string str = "VisualStudio2013";

  16:              Console.WriteLine("Value of str:{0}", str);

  17:              Console.WriteLine("str has {0} characters.", str.Length); //获取长度

  18:              Console.WriteLine("str in uppercase:{0}", str.ToUpper()); //转成大写

  19:              Console.WriteLine("str in lowercase:{0}", str.ToLower()); //转成小写

  20:              Console.WriteLine("str contains the letter 2013 ? :{0}", str.Contains("2013")); //判断是否包含"2013"

  21:              Console.WriteLine("str after replace : {0}",str.Replace("2013","")); //将2013 替换掉

  22:              Console.ReadKey();

  23:          }

  24:          //拼接字符串

  25:          static void StringConcatenation()

  26:          {

  27:              //使用“+”拼接字符串

  28:              Console.WriteLine("String concatenation:");

  29:              string str1 = "字符串";

  30:              string str2 = "拼接";

  31:              string str3 = str1 + str2;

  32:              Console.WriteLine(str3);

  33:              Console.ReadKey();

  34:              //使用String.Concat()拼接

  35:              Console.WriteLine("String concatenation:");

  36:              string str4 = "世界杯";

  37:              string str5 = "比赛";

  38:              string str6 = String.Concat(str4, str5);

  39:              Console.WriteLine(str6);

  40:              Console.ReadKey();

  41:               

  42:          }

  43:          //给字符串转义

  44:          static void EscapeChars()

  45:          {

  46:              Console.WriteLine("Escape character:\a");

  47:              string stringWithTabs = "this\tis\ta\tdemo\t!";

  48:              Console.WriteLine(stringWithTabs);

  49:              Console.WriteLine("\"Hello Wolrd!\"");

  50:              Console.WriteLine("C:\\Windows\\System32\\drivers\\etc");

  51:              //使用逐字字符串

  52:              Console.WriteLine(@"D:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7");

  53:              //使用逐字字符串保留空格

  54:              string longString = @"

  55:                                  春江潮水连海平，海上明月共潮生。

  56:                                  滟滟随波千万里，何处春江无月明！ 

  57:                                  江流宛转绕芳甸，月照花林皆似霰; 

  58:                                  空里流霜不觉飞，汀上白沙看不见。 

  59:                                  江天一色无纤尘，皎皎空中孤月轮。 

  60:                                  江畔何人初见月？江月何年初照人？ 

  61:                                  人生代代无穷已，江月年年只相似。";

  62:              Console.WriteLine(longString);

  63:              Console.ReadKey();

  64:          }

  65:          //相等性测试

  66:          static void StringWquality()

  67:          {

  68:              Console.WriteLine("字符串相等测试");

  69:              string str1 = "Hello";

  70:              string str2 = "World";

  71:              Console.WriteLine("str1={0}", str1);

  72:              Console.WriteLine("str2={0}", str2);

  73:              Console.WriteLine("str1=str2:{0}", str1 = str2);

  74:              Console.WriteLine("str1=Hello:{0}", str1 == "Hello");

  75:              Console.WriteLine("str1=HELLO:{0}", str1 == "HELLO");

  76:              Console.WriteLine("str1.Equals(str2):{0}", str1.Equals(str2));

  77:              Console.WriteLine("Hello.Equals(str2):{0}", "Hello".Equals(str2));

  78:              Console.ReadKey();

  79:          }

  80:          static void Main(string[] args)

  81:          {

  82:              BasicStringFunctionality();

  83:              StringConcatenation();

  84:              EscapeChars();

  85:              StringWquality();

  86:          }

  87:      }

  88:  }

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

运行效果