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C# 字符串方法和属性的演示代码

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using System;

class StringMethods
{
   static void Main()
   {
      char[] characterArray;
      int position;
      string result, string1;

      string1 = "The education of Cissy!";
      characterArray = new char[30];

      // create the output string
      result = "string = \"" + string1 + "\"";

      // Length property
      result += "\nstring length = " + string1.Length;

      // IndexOf method (returns -1 if not found)
      position = string1.IndexOf ("e");
      result += "\nstring contains an 'e' at index: " 
         + position;

      // find another "e"
      position = string1.IndexOf ("e", position + 1);
      result += "\nstring contains a second 'e' at index: "
         + position;

      // Search/Find a substring (returns True or False)
      if (string1.Contains ("Cissy"))
      result += "\nstring contains 'Cissy' --> "
         + string1.Contains ("Cissy");

      // Search/Find a substring position
      position = string1.IndexOf("Cissy");
      result += "\n'Cissy' starts at index: "
         + position;

      // change case of string
      result += "\nlower case string: \""
         + string1.ToLower() + "\"";
      result += "\nupper case string: \""
         + string1.ToUpper() + "\"";

      // indexing, loop through characters 
      // in string1 and display in reverse order
      result += "\nreverse string: \"";
      for (int i = string1.Length - 1; i >= 0; i--)
      {
         result += string1[i];
      }

      // Replace method
      result += "\"\nreplace 'educ' with 'matur': ";
      result += "\"" + string1.Replace ("educ", "matur") + "\"";

      // Use the CopyTo method to copy characters 
      // from string1 into characterArray
      string1.CopyTo (0, characterArray, 0, 6);
      result += "\nFirst 6 characters of array contain: \"";
      // display array
      for (int i = 0; i < 6; i++)
      {
         result += characterArray[i];
      }
      Console.WriteLine (result +
         "\"\n\n(Press \"Enter\" to exit.)");
      Console.Read();
   }
}

标签:字符串,方法,属性

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