Entity framework 用于建模的非基本数据类型？

我想在我的歌曲实体中使用“TagLib.Tag”数据类型。 当我尝试启用迁移时，我得到：

public class Song
    {
        public int SongID { get; set; }
        public string URL { get; set; }
        public virtual TagLib.Tag SongInfo { get; set; }
    }

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如何在模型中使用外部复杂数据类型？

我看到关于标记实体类的错误，您没有为此键属性定义

也许您的代码如下所示：

One or more validation errors were detected during model generation:

\tSystem.Data.Entity.Edm.EdmEntityType: : EntityType 'XmpNode' has no key defined. Define the key for this EntityType.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Exif_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Exif_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'XmpTag_NodeTree_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Xmp_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Xmp_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_OtherTags_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_OtherTags_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_AllTags_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_AllTags_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: EntityType: EntitySet 'XmpNodes' is based on type 'XmpNode' that has no keys defined.
\tSystem.Data.Entity.Edm.EdmEntitySet: EntityType: EntitySet 'Tags' is based on type 'Tag' that has no keys defined.

public class Tag
{
    public string TagName{get; set;}
    // other fields
}

您必须按以下方式进行更改：

One or more validation errors were detected during model generation:

\tSystem.Data.Entity.Edm.EdmEntityType: : EntityType 'XmpNode' has no key defined. Define the key for this EntityType.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Exif_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Exif_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'XmpTag_NodeTree_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Xmp_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_Xmp_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_OtherTags_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_OtherTags_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_AllTags_Source' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: : The referenced EntitySet 'Tags' for End 'CombinedImageTag_AllTags_Target' could not be found in the containing EntityContainer.
\tSystem.Data.Entity.Edm.EdmEntitySet: EntityType: EntitySet 'XmpNodes' is based on type 'XmpNode' that has no keys defined.
\tSystem.Data.Entity.Edm.EdmEntitySet: EntityType: EntitySet 'Tags' is based on type 'Tag' that has no keys defined.

public class Tag
{
    public string TagName{get; set;}
    // other fields
}

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请添加Taglib.Tag类详细信息