Question

我正在转换一个项目，所以我可以使用Moq（模拟）测试。

我有一个具有接口列表的类。我理解接口无法序列化。所以我正在尝试解决它。

然而，在尝试了其他SO帖子（Serializing a List hold an interface to XML，XmlSerializer serialize generic List of interface）的众多方法之后，我创建了一个测试控制台;我觉得我需要寻求帮助。

下面的示例代码将List包装在自己的类中，以便能够实现ISerializable接口。但是，我有以下总结错误：

Cannot serialize member MyConcreteCollection.ChildList of type IChild because 
it is an interface.

问题在于此代码

public void WriteXml(System.Xml.XmlWriter writer)
{
    //-- HAVE also tried IChild child in ChildList
    foreach (ConcreteChild child in ChildList)
    {
        XmlSerializer s = new XmlSerializer(child .GetType());
        s.Serialize(writer, child );
    }
}

这是完整的代码列表。这是有效的，并由用户杰伊

实施

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.IO;

[Serializable]
public class ConcreteParent
{
    public MyConcreteCollection MyConcreteCollection { get; set; }
}

[Serializable]
public class MyConcreteCollection : IXmlSerializable //(Was ISerializable, as fixed by user Jay)
{
    public List<IChild> ChildList { get; set; }

    public System.Xml.Schema.XmlSchema GetSchema() { return null; }
    public void ReadXml(System.Xml.XmlReader reader) { }
    public void GetObjectData(SerializationInfo info, StreamingContext context) { }

    public void WriteXml(System.Xml.XmlWriter writer)
    {
        foreach (ConcreteChild child in ChildList)
        {
            XmlSerializer s = new XmlSerializer(child.GetType());
            s.Serialize(writer, child);
        }
    }

}

public interface IChild { }
[Serializable] public class ConcreteChild : IChild { }


public static class SerializerHelper<T>
{
    public static string Serialize(T myobject)
    {
        XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
        StringWriter stringWriter = new StringWriter();
        xmlSerializer.Serialize(stringWriter, myobject);
        string xml = stringWriter.ToString();

        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.LoadXml(xml);
        StringWriter sw = new StringWriter();
        XmlTextWriter xw = new XmlTextWriter(sw);
        xmlDoc.WriteTo(xw);

        return sw.ToString();
    }
}

class Program
{
    static void Main(string[] args)
    {
        try
        {
            ConcreteParent concreteParent = new ConcreteParent();
            concreteParent.MyConcreteCollection = new MyConcreteCollection();
            concreteParent.MyConcreteCollection.ChildList = new List<IChild>();
            concreteParent.MyConcreteCollection.ChildList.Add(new ConcreteChild());

            string xml = SerializerHelper<ConcreteParent>.Serialize(concreteParent);
            Console.WriteLine(xml);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.ToString());
        }
        Console.ReadKey();
    }
}

Answer 1

您MyConcreteCollection正在实施ISerializable。如您链接的第一篇文章所示，您需要实现IXmlSerializable。

转换为Mock需要接口。不能Xml序列化

1 个答案: