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  • 从文件读取文本

    下面的代码示例演示如何从文本文件中读取文本。第二个示例在检测到文件结尾时向您发出通知。通过使用 ReadAllLines 或 ReadAllText 方法也可以实现此功能。


    using System;
    using System.IO;


    class Test 
    {
        public static void Main() 
        {
            try 
            {
                // Create an instance of StreamReader to read from a file.
                // The using statement also closes the StreamReader.
                using (StreamReader sr = new StreamReader("TestFile.txt")) 
                {
                    String line;
                    // Read and display lines from the file until the end of 
                    // the file is reached.
                    while ((line = sr.ReadLine()) != null) 
                    {
                        Console.WriteLine(line);
                    }
                }
            }
            catch (Exception e) 
            {
                // Let the user know what went wrong.
                Console.WriteLine("The file could not be read:");
                Console.WriteLine(e.Message);
            }
        }
    }


    using System;
    using System.IO;
    public class TextFromFile 
    {
        private const string FILE_NAME = "MyFile.txt";
        public static void Main(String[] args) 
        {
            if (!File.Exists(FILE_NAME)) 
            {
                Console.WriteLine("{0} does not exist.", FILE_NAME);
                return;
            }
            using (StreamReader sr = File.OpenText(FILE_NAME))
            {
                String input;
                while ((input=sr.ReadLine())!=null) 
                {
                    Console.WriteLine(input);
                }
                Console.WriteLine ("The end of the stream has been reached.");
                sr.Close();
            }
        }

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  • 原文地址:https://www.cnblogs.com/dengshiwei/p/4258686.html
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