Question

我必须将对象写入二进制文件。我的结构看起来像这样。

   Struct Company
    {
       int numberofemployees
       list of Struct Employee.
    }

    Struct Employee
    {
       string EmployeeName;
       string Designation;
    }

进行上述操作的最佳方法是什么？问候拉朱

Answer 1

据我了解，BinaryFormatter是这项工作的工具。

编辑：正如Marc在评论中解释的那样，BinaryFormatter有一些缺点。他在博客中推荐protobuf-net。

Answer 2

您希望输出到底是什么样的？你可以手动编写它（参见Lirik的答案），或者如果你想要运行时支持，可能就像protobuf-net那样。

如果您正在使用类（我希望您确实应该这样做），这将是微不足道的，但另外protobuf-net v2（目前仅作为源提供）应该与“原样”一起使用。

有关信息，我将按以下方式进行操作：

    public class Company
    {
        private readonly List<Employee> employees = new List<Employee>();
        public List<Employee> Employees { get { return employees;}}
    }

    public class Employee
    {
        public string EmployeeName {get;set;}
        public string Designation {get;set;}
    }

这可以使用序列化属性进行修饰，或者（再次使用protobuf-net v2）像这样的测试（通过）：

    [Test]
    public void CanSerializeCompany()
    {
        var model = TypeModel.Create();
        model.Add(typeof(Company), false).Add("Employees");
        model.Add(typeof(Employee), false).Add("EmployeeName", "Designation");
        model.CompileInPlace();

        Company comp = new Company {
            Employees = {
                new Employee { Designation = "Boss", EmployeeName = "Fred"},
                new Employee { Designation = "Grunt", EmployeeName = "Jo"},
                new Employee { Designation = "Scapegoat", EmployeeName = "Alex"}}
        }, clone;
        using(var ms = new MemoryStream()) {
            model.Serialize(ms, comp);
            ms.Position = 0;
            Console.WriteLine("Bytes: " + ms.Length);
            clone = (Company) model.Deserialize(ms, null, typeof(Company));
        }
        Assert.AreEqual(3, clone.Employees.Count);
        Assert.AreEqual("Boss", clone.Employees[0].Designation);
        Assert.AreEqual("Alex", clone.Employees[2].EmployeeName);
    }

（并写入46个字节）

应该使用私有字段，结构等 - 我必须看看......

如果您能够添加属性，则无需手动设置模型（前4行）。其余代码只显示完整的往返使用情况。

Answer 3

Here is an example如何读取/写入二进制文件：

using System;
using System.IO;

public class BinaryFileTest {

    private static void Main() {
        FileStream fs = new FileStream("test.dat", FileMode.Create);
        BinaryWriter w = new BinaryWriter(fs);

        w.Write(1.2M);
        w.Write("string");
        w.Write("string 2");
        w.Write('!');
        w.Flush();
        w.Close();
        fs.Close();

        fs = new FileStream("test.dat", FileMode.Open);
        StreamReader sr = new StreamReader(fs);
        Console.WriteLine(sr.ReadToEnd());
        fs.Position = 0;
        BinaryReader br = new BinaryReader(fs);
        Console.WriteLine(br.ReadDecimal());
        Console.WriteLine(br.ReadString());
        Console.WriteLine(br.ReadString());
        Console.WriteLine(br.ReadChar());
        fs.Close();

    }
}

C＃将对象写入二进制文件

3 个答案: