StreamReader 的用法(C#)

最新推荐文章于 2025-01-07 09:33:16 发布

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本文提供了一个使用C#进行文件读写的示例代码。通过创建并写入文本到指定路径的文件，然后立即读取该文件的内容并显示在控制台上。此外，还展示了如何使用StreamReader的Read方法来读取单个字符。

using System;
using System.IO;

class Test
{

    public static void Main()
    {
        string path = @"c:/temp/MyTest.txt";

        try
        {
            if (File.Exists(path))
            {
                File.Delete(path);
            }

            using (StreamWriter sw = new StreamWriter(path))
            {
                sw.WriteLine("This");
                sw.WriteLine("is some text");
                sw.WriteLine("to test");
                sw.WriteLine("Reading");
            }

            using (StreamReader sr = new StreamReader(path))
            {
                while (sr.Peek() >= 0)
                {
                    Console.Write((char)sr.Read());
                }
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}

下面的代码示例演示如何使用 Read()()() 方法重载读取单个字符，并将 ASCII 整数的输出格式设置为十进制和十六进制数。

using System;
using System.IO;

class StrmRdrRead
{
public static void Main()
    {
    //Create a FileInfo instance representing an existing text file.
    FileInfo MyFile=new FileInfo(@"c:/csc.txt");
    //Instantiate a StreamReader to read from the text file.
    StreamReader sr=MyFile.OpenText();
    //Read a single character.
    int FirstChar=sr.Read();
    //Display the ASCII number of the character read in both decimal and hexadecimal format.
    Console.WriteLine("The ASCII number of the first character read is {0:D} in decimal and {1:X} in hexadecimal.",
        FirstChar, FirstChar);
    //
    sr.Close();
    }
}