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【CSharp】从文件读取文本

作者: / 发布于2011/1/10/ 400

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

<div>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();
 }
</div>

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　读取文本　

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