sample12.cs

C#函数手册

namespace apiBook
{
	using System;
	using System.IO;	
	public class TestStreamWriterClass
	{
		public static void Main()
		{
			Console.WriteLine("创建并打开文件，写入26个字母。");
			FileStream testFS = new FileStream("C:\\language\\testStreamWriter.txt", FileMode.OpenOrCreate);
			char[] cA = {'B','C','D','E','F','G','H','I','J','K','L','M','N','O','P'};
			StreamWriter writer = new StreamWriter(testFS);
			writer.Write('A');
			//使用Write(char value)方法将字符写入流
			writer.Write('B');
			writer.Write('C');
			writer.Write(cA, 2,cA.Length-2);
			//使用Write(char[] buffer,int index,int count)方法将字符串写入流
			writer.Write("QRSTUVWXYZ");
			//使用Write( string value)方法将字符串写入流
			writer.Flush();
			//使用Flush方法刷新
			writer.Close();
			//使用Close方法关闭资源
			testFS.Close();
			testFS=new FileStream("C:\\language\\testStreamWriter.txt", FileMode.Open);
			StreamReader reader=new StreamReader(testFS);
			Console.WriteLine();
			Console.WriteLine("现在读取文件内容：");
			while(reader.Peek()!=-1)
			{
				Console.WriteLine(reader.ReadLine());
			
			}
			reader.Close();
			testFS.Close();	
			Console.ReadLine();
		}
	}
}