见:https://www.cnblogs.com/springsnow/p/9428695.html
读写流的基元数据类型。可以操作图像、压缩文件等二进制文件。也可以是MemoryStream等。
不需要一个字节一个字节进行操作,可以是2个、4个、或8个字节这样操作。
可以将一个字符或数字按指定数量的字节进行写入。
using (BinaryWriter writer = new BinaryWriter(File.Open(fileName, FileMode.Create))) { writer.Write(1.250F); writer.Write(@"c:\Temp"); writer.Write(10); writer.Write(true); }
Response.BinaryWrite()方法输出二进制图像
//将图片文件存在文件流中 long fslength = fs.Length;//流长度 byte[] b=new byte[(int)fslength];//定义二进制数组 fs.Read(b, 0, (int)fslength);//将流中字节写入二进制数组中 fs.Close();//关闭流 Response.ContentType = "image/jpg";//没有这个会出现乱码 //将图片输出在页面每次读取都回提升流中的当前位置相应数量的字节。
下面的代码示例演示了如何存储和检索文件中的应用程序设置
const string fileName = "AppSettings.dat"; float aspectRatio; string tempDirectory; int autoSaveTime; bool showStatusBar; if (File.Exists(fileName)) { using (BinaryReader reader = new BinaryReader(File.Open(fileName, FileMode.Open))) { aspectRatio = reader.ReadSingle(); tempDirectory = reader.ReadString(); autoSaveTime = reader.ReadInt32(); showStatusBar = reader.ReadBoolean(); } Console.WriteLine("Aspect ratio set to: " + aspectRatio); Console.WriteLine("Temp directory is: " + tempDirectory); Console.WriteLine("Auto save time set to: " + autoSaveTime); Console.WriteLine("Show status bar: " + showStatusBar); }
BinaryReader读取图片:
using (FileStream fs = new FileStream("1.jpg", FileMode.Open, FileAccess.Read)) { //将图片以文件流的形式进行保存 using (BinaryReader br = //将流读入到字节数组中 br.Close(); } }
1、SoapFormatter(用于HTTP中)和BinaryFormatter(用于TCP中)类实现了IFormatter接口 (由继承IRemotingFormatter,支持远程过程调用 (Rpc))
XML序列化见:https://www.cnblogs.com/springsnow/p/9469399.html
2、举例:
[Serializable] public class Product //实体类 { public long Id; [NonSerialized]//标识不序列化此成员Name public string Name; public Product(long Id, string Name) { this.Id = Id; this.Name = Name; } } static void Main() { //序列化(对象保存到文件) List<Product> Products = new List<Product> { new Product(1,"a"),new Product(2,"b") }; FileStream fs = new FileStream("DataFile.dat", FileMode.Create); IFormatter formatter = new BinaryFormatter(); formatter.Serialize(fs, Products); fs.Close(); //反序列化(文件内容转成对象) FileStream fs1 = new FileStream("DataFile.dat", FileMode.Open); BinaryFormatter formatter1 = new BinaryFormatter(); List<Product> addresses = (List<Product>)formatter1.Deserialize(fs1); fs1.Close(); foreach (Product de in addresses) { Console.WriteLine("{0} lives at {1}.", de.Id, de.Name); } }