1     class Program
  2     {
  3         static void Main(string[] args)
  4         {
  5             //Console.WriteLine("請輸入你喜歡的課程");
  6             //string lessonOne = Console.ReadLine();
  7             ////將字串轉換成大寫
  8             ////lessonOne = lessonOne.ToUpper();
  9             ////將字串轉換成小寫形式
 10             ///
 
/lessonOne = lessonOne.ToLower();
 11             //Console.WriteLine("請輸入你喜歡的課程");
 12             //string lessonTwo = Console.ReadLine();
 13             ////lessonTwo = lessonTwo.ToUpper();
 14             ////lessonTwo = lessonTwo.ToLower();
 15             //if (lessonOne.Equals(lessonTwo,StringComparison.OrdinalIgnoreCase))
 
 16             //{
 17             //    Console.WriteLine("你們倆喜歡的課程相同");
 18             //}
 19             //else
 20             //{
 21             //    Console.WriteLine("你們倆喜歡的課程不同");
 22             //}
 23             //Console.ReadKey();
 24 
 25             /*分割字串Split*/
 26             //string s = "a b   dfd _   +    =  ,,, fdf ";
 
 27             //char[] chs = { ' ', '_', '+', '=', ',' };
 28             //string[] str = s.Split(chs, StringSplitOptions.RemoveEmptyEntries);
 29             //for (int i=0;i<str.Length;i++)
 30             //{
 31             //    Console.WriteLine(str[i]);
 32             //}
 33             //Console.ReadKey();
 34 
 35 
 36             //練習：從日期字串（"2008-08-08"）中分析出年、月、日；2008年08月08日。
 37             //讓使用者輸入一個日期格式如:2008-01-02,你輸出你輸入的日期為2008年1月2日
 38             //string s = "2008-08-08";
 39             //char[] chs = { '-' };
 40             //string[] date = s.Split(chs, StringSplitOptions.RemoveEmptyEntries);
 41             //Console.WriteLine("{0}年{1}月{2}日", date[0], date[1], date[2]);
 42             //Console.ReadKey();
 43 
 44 
 45             /*老趙*/
 46             //string str = "國家關鍵人物老趙";
 47             //if (str.Contains("老趙"))
 48             //{
 49             //    str = str.Replace("老趙", "**");
 50             //}
 51             //Console.WriteLine(str);
 52             //Console.ReadKey();
 53 
 54 
 55             /*Substring 擷取字串*/
 56             //string str = "今天天氣好晴朗，處處好風光";
 57             //str = str.Substring(1,2);
 58             //Console.WriteLine(str);
 59             //Console.ReadKey();
 60 
 61 
 62             //string str = "今天天氣好晴朗，處處好風光";
 63             //if (str.EndsWith("風"))
 64             //{
 65             //    Console.WriteLine("是的");
 66             //}
 67             //else
 68             //{
 69             //    Console.WriteLine("不是的");
 70             //}
 71             //Console.ReadKey();
 72 
 73 
 74             //string str = "今天天氣好晴朗，天天處天好風光";
 75             //int index = str.IndexOf('哈', 2);
 76             //Console.WriteLine(index);
 77             //Console.ReadKey();
 78 
 79 
 80             //string str = "今天天氣好晴朗，處處好風光";
 81             //int index = str.LastIndexOf('天');
 82             //Console.WriteLine(index);
 83             //Console.ReadKey();
 84 
 85 
 86             /*LastIndexOf  Substring*/
 87             //string path = @"c:\a\b\c蒼\d\e蒼\f\g\\fd\fd\fdf\d\vfd\蒼老師蒼.wav";
 88             //int index = path.LastIndexOf("\\");
 89             //path = path.Substring(index + 1);
 90             //Console.WriteLine(path);
 91             //Console.ReadKey();
 92 
 93             /*去掉空格*/
 94             //string str = "      hahahah      ";
 95             //str = str.Trim();
 96             //str = str.TrimStart();
 97             //str = str.TrimEnd();
 98             //Console.Write(str);
 99             //Console.ReadKey();
100 
101             /*判斷是否為空*/
102             //string str = "fdsfdsfds";
103             //if (string.IsNullOrEmpty(str))
104             //{
105             //    Console.WriteLine("是的");
106             //}
107             //else
108             //{
109             //    Console.WriteLine("不是");
110             //}
111             //Console.ReadKey();
112 
113             /*張三|李四|王五|趙六|田七*/
114             //string[] names = { "張三", "李四", "王五", "趙六", "田七" };
115             //string strNew = string.Join("|", "張三","李四","王五","趙六","田七");
116             //Console.WriteLine(strNew);
117             //Console.ReadKey();
118 
119         }
120     }