反序列化：类型转换错误（不同版本）

发布于 2024-12-10 06:47:15 字数 1186 浏览 0 评论 0原文

我有一个类序列化到一个文件，即。 myfile01.myfile。我正在使用二进制序列化（不是 xml）。

在此类的版本 1 中，有一个字段“ColoredFont”。这是一个包含字体和颜色的类。

在该类的版本 2 中，类 ColoredFont 发生了更改，并且“Font”字段被“SerializedFont”替换。

现在的问题是：当我想打开版本 1 文件时，出现错误：

 Object of type 'System.Drawing.Font' cannot be converted to 
 type 'Project.SerializableFont'.

我已经使用自定义序列化绑定程序

public class Binder : SerializationBinder {

    public override Type BindToType(string assemblyName, string typeName) {
        Type tyType = null;
        string sShortAssemblyName = assemblyName.Split(',')[0];
        Assembly[] ayAssemblies = AppDomain.CurrentDomain.GetAssemblies();
        if (sShortAssemblyName.ToLower() == "project"
            || sShortAssemblyName == "SoftwareV_3.0"  )
        {
            sShortAssemblyName = "SoftwareV_4.0";
        }
           foreach (Assembly ayAssembly in ayAssemblies) {
               if (sShortAssemblyName == ayAssembly.FullName.Split(',')[0]) {
                tyType = ayAssembly.GetType(typeName);
                break;
            }
        }
        return tyType;
    }
}

如何告诉反序列化将 System.Drawing.Font 转换为 SerializedFont？

原文

I have a class I serialize to a file, ie. myfile01.myfile. I'm using binary serialization (not xml).

In version 1 of this class, there was a field 'ColoredFont'. This is a class that contains a Font and a Color.

In version 2 of the class, the class ColoredFont was changed, and the 'Font' field was replaced by 'SerializableFont'.

Now the problem: when i want to open version 1 files, I get an error :

 Object of type 'System.Drawing.Font' cannot be converted to 
 type 'Project.SerializableFont'.

I already use a custom serialization binder

public class Binder : SerializationBinder {

    public override Type BindToType(string assemblyName, string typeName) {
        Type tyType = null;
        string sShortAssemblyName = assemblyName.Split(',')[0];
        Assembly[] ayAssemblies = AppDomain.CurrentDomain.GetAssemblies();
        if (sShortAssemblyName.ToLower() == "project"
            || sShortAssemblyName == "SoftwareV_3.0"  )
        {
            sShortAssemblyName = "SoftwareV_4.0";
        }
           foreach (Assembly ayAssembly in ayAssemblies) {
               if (sShortAssemblyName == ayAssembly.FullName.Split(',')[0]) {
                tyType = ayAssembly.GetType(typeName);
                break;
            }
        }
        return tyType;
    }
}

How I can tell the deserialization to convert System.Drawing.Font to SerializableFont ??

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毁梦 2024-12-17 06:47:15

对 ColoredFont 类尝试一下：

[Serializable]
public class ColoredFont : ISerializable
{
    public SerializableFont SerializableFont;
    public Color Color;

    private ColoredFont(SerializationInfo info, StreamingContext context)
    {
        Color = (Color)info.GetValue("Color", typeof(Color));
        try
        {
            SerializableFont = (SerializableFont)info.GetValue("SerializableFont", typeof(SerializableFont));
        }
        catch (SerializationException serEx)
        {
            Font f = (Font)info.GetValue("Font", typeof(Font));
            // do something to initialize SerializedFont from 'f'
        }

    }

    #region ISerializable Members

    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("SerializableFont", SerializableFont);
        info.AddValue("Color", Color);
    }

    #endregion
}

Try this for the ColoredFont class :

[Serializable]
public class ColoredFont : ISerializable
{
    public SerializableFont SerializableFont;
    public Color Color;

    private ColoredFont(SerializationInfo info, StreamingContext context)
    {
        Color = (Color)info.GetValue("Color", typeof(Color));
        try
        {
            SerializableFont = (SerializableFont)info.GetValue("SerializableFont", typeof(SerializableFont));
        }
        catch (SerializationException serEx)
        {
            Font f = (Font)info.GetValue("Font", typeof(Font));
            // do something to initialize SerializedFont from 'f'
        }

    }

    #region ISerializable Members

    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("SerializableFont", SerializableFont);
        info.AddValue("Color", Color);
    }

    #endregion
}

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