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C# - StreamReader类

C#StreamReader类用于从流中读取字符串。它继承TextReader类。它提供read()和ReadLine()方法从流中读取数据。

读取一行的C#StreamReader示例

让无涯教程看一下从文件中读取单行数据的StreamReader类的简单示例。

链接：https://www.learnfk.comhttps://www.learnfk.com/csharp/c-sharp-streamreader.html

来源：LearnFk无涯教程网

复制代码

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：

Hello C#

读取所有行的C#StreamReader示例

复制代码

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();
    }
}