C# StreamReader 类用于从流中读取字符串。它继承了 TextReader 类。它提供了 Read() 和 ReadLine() 方法来从流中读取数据。
让我们看一下从文件中读取单行数据的 StreamReader 类的简单示例。
using System; using System.IO; public class StreamReaderExample { public static void Main(string[] args) { FileStream f = new FileStream("e:\\output.txt", FileMode.OpenOrCreate); StreamReader s = new StreamReader(f); string line=s.ReadLine(); Console.WriteLine(line); s.Close(); f.Close(); } }
输出:
你好C#
using System; using System.IO; public class StreamReaderExample { public static void Main(string[] args) { FileStream f = new FileStream("e:\\a.txt", FileMode.OpenOrCreate); StreamReader s = new StreamReader(f); string line = ""; while ((line = s.ReadLine()) != null) { Console.WriteLine(line); } s.Close(); f.Close(); } }
输出:
Hello C# this is file handling