ASP.NET 核心 - MVC - 当 Model 包含列表时回发<t>与派生类</t>

Question

已经为此苦苦挣扎了一段时间...

我有：

public class SurveyDefinitionModel
{
    public SurveyDefinitionModel()
    { }


    public int Id { get; set; }
    public String Title { get; set; }
    public List<QuestionBaseModel> Questions { get; set; } = new List<QuestionBaseModel>();
}

   public class QuestionMultipleRadioModel : QuestionMultipleChoiceModel {...}
   public class QuestionMultipleCheckBoxModel : QuestionMultipleChoiceModel {...}
   public abstract class QuestionMultipleChoiceModel : QuestionBaseModel{...}
   public abstract class QuestionBaseModel {...}

所有的渲染都很好（使用编辑器模板）......回发字段（通过 F12 调试器）看起来很好......

但是列表永远不会被填充....

注意：完整项目@ https://github.com/DynConcepts/variantlistpostbackMVC

Answer 1

终于找到了合适的素材：“Polymorphic model binding”

https://docs.microsoft.com/en-us/aspnet/core/mvc/advanced/custom-model-binding?view=aspnetcore-3.0

我需要在这里清理代码，然后更新 github 存储库。