寫入文本文件：
1 class Program 2 { 3 static void Main(String[] args) 4 { 5 //寫入string數組，每個string一行 6 string[] lines = { "first line", "second line ", "third line", "forth line" }; 7 System.IO.File.WriteAllLines(@"D:\IOTest\IOTest1.txt", lines); 8 //寫入一個字符串 9 string text = "ahhhhhhhhhhhhhhhhhhhhhhhhhhh"; 10 System.IO.File.WriteAllText(@"D:\IOTest\IOTest2.txt", text); 11 //StreamWriter類，以流的方式寫入 12 System.IO.StreamWriter file = new System.IO.StreamWriter(@"D:\IOTest\IOTest3.txt", true); 13 foreach (var line in lines) 14 { 15 if (!line.Contains("second")) 16 { 17 file.Write(line); 18 file.WriteLine(line); 19 } 20 } 21 file.Flush(); 22 file.Close(); 23 } 24 }
讀取文本文件：
1 class Program 2 { 3 static void Main(String[] args) 4 { 5 //讀取為一個字符串 6 string text = System.IO.File.ReadAllText(@"D:\iOTEST\IOTEST2.TXT"); 7 //讀取為字符串數組，每行一個字符串 8 string[] lines = System.IO.File.ReadAllLines(@"D:\IOTEST\IOTEST1.TXT"); 9 //StreamReader類，以流的方式讀取 10 System.IO.StreamReader sr = new System.IO.StreamReader(@"D:\iOTEST\IOTEST3.TXT"); 11 string str; 12 while ((str = sr.ReadLine()) != null) 13 { 14 Console.WriteLine(str); 15 } 16 sr.Close(); 17 } 18 }
