C# 中的 读取和写入二进制文件函数

BinaryReader和BinaryWriter类用于读取和写入二进制文件。

BinaryReader类

BinaryReader类用于从文件中读取二进制数据。通过将FileStream对象传递给其构造函数来创建BinaryReader对象。

BinaryWriter类

BinaryWriter类用于将二进制数据写入流。BinaryWriter对象是通过将FileStream对象传递给其构造函数来创建的。

下面的示例演示读取和写入二进制数据-

using System;
using System.IO;

namespace BinaryFileApplication {
   class Program {
      static void Main(string[] args) {
         BinaryWriter bw;
         BinaryReader br;
         
         int i = 25;
         double d = 3.14157;
         bool b = true;
         string s = "I am happy";
         
         //create the file
         try {
            bw = new BinaryWriter(new FileStream("mydata", FileMode.Create));
         } catch (IOException e) {
            Console.WriteLine(e.Message + "\n Cannot create file.");
            return;
         }
         
         //writing into the file
         try {
            bw.Write(i);
            bw.Write(d);
            bw.Write(b);
            bw.Write(s);
         } catch (IOException e) {
            Console.WriteLine(e.Message + "\n Cannot write to file.");
            return;
         }
         bw.Close();
         
         //reading from the file
         try {
            br = new BinaryReader(new FileStream("mydata", FileMode.Open));
         } catch (IOException e) {
            Console.WriteLine(e.Message + "\n Cannot open file.");
            return;
         }
         
         try {
            i = br.ReadInt32();
            Console.WriteLine("Integer data: {0}", i);
            d = br.ReadDouble();
            Console.WriteLine("Double data: {0}", d);
            b = br.ReadBoolean();
            Console.WriteLine("Boolean data: {0}", b);
            s = br.ReadString();
            Console.WriteLine("String data: {0}", s);
         } catch (IOException e) {
            Console.WriteLine(e.Message + "\n Cannot read from file.");
            return;
         }
         br.Close();
         Console.ReadKey();
      }
   }
}

编译并执行上述代码时，将生成以下输出-

Integer data: 25
Double data: 3.14157
Boolean data: True
String data: I am happy