1.BinaryReader和BinaryWriter简介

2.BinaryReader和BinaryWriter示例

1.BinaryReader和BinaryWriter简介

a.BinaryWriter:将.NET 基本类型(int、float、string、byte[]等)写入流(FileStream、MemoryStream等),按二进制 格式存储(而非文本),体积更小、读写更快 b.BinaryReader:从流中读取由BinaryWriter写入的二进制数据,还原为对应.NET类型,需严格匹配写入顺序

2.BinaryReader和BinaryWriter示例

usingSystem;usingSystem.IO;// ==================== 写入二进制数据（BinaryWriter） ====================publicstaticvoidWriteBinaryFile(stringpath){// 1. 创建文件流（FileMode.Create：覆盖已有文件，FileAccess.Write：只写）using(FileStreamfs=newFileStream(path,FileMode.Create,FileAccess.Write)){// 2. 创建BinaryWriter，关联文件流（可选指定编码，默认UTF-8）using(BinaryWriterwriter=newBinaryWriter(fs)){// 3. 按顺序写入不同类型数据（核心：写入顺序必须和读取顺序一致）writer.Write(100);// 写入int（4字节）writer.Write(3.14f);// 写入float（4字节）writer.Write(true);// 写入bool（1字节）writer.Write("Unity存档");// 写入string（先存长度，再存字节）writer.Write(newbyte[]{0x01,0x02,0x03});// 写入字节数组}// using结束自动释放writer，关闭流}}// ==================== 读取二进制数据（BinaryReader） ====================publicstaticvoidReadBinaryFile(stringpath){if(!File.Exists(path))return;using(FileStreamfs=newFileStream(path,FileMode.Open,FileAccess.Read)){using(BinaryReaderreader=newBinaryReader(fs)){// 3. 按写入顺序读取数据（顺序错会导致数据解析错误）intintValue=reader.ReadInt32();floatfloatValue=reader.ReadSingle();boolboolValue=reader.ReadBoolean();stringstrValue=reader.ReadString();byte[]byteArr=reader.ReadBytes(3);// 读取指定长度的字节数组// 输出验证Console.WriteLine($"Int:{intValue}");// 输出：100Console.WriteLine($"Float:{floatValue}");// 输出：3.14Console.WriteLine($"Bool:{boolValue}");// 输出：TrueConsole.WriteLine($"String:{strValue}");// 输出：Unity存档Console.WriteLine($"ByteArr:{BitConverter.ToString(byteArr)}");// 01-02-03}}}// 调用示例WriteBinaryFile("saveData.bin");ReadBinaryFile("saveData.bin");

using(MemoryStreamms=newMemoryStream())using(BinaryWriterwriter=newBinaryWriter(ms)){writer.Write(123);writer.Write("内存数据");// 重置指针到起始位置，才能读取数据ms.Position=0;using(BinaryReaderreader=newBinaryReader(ms)){intnum=reader.ReadInt32();// 正确读取123stringstr=reader.ReadString();// 正确读取"内存数据"}}