Question

I'm developing an asp.net core 1.0 (MVC 6) full framework 4.6.1 and I created a Class Library targeting framework 4.6.1 for Data Modeling using Telerik DataAccess core & fluent 2016.1.224.

I have some classes, one of them is:

namespace DataModel 
{
    public partial class Directory
    {
        private int _id;
        public virtual int Id
        {
            get
            {
                return this._id;
            }
            set
            {
                this._id = value;
            }
        }

        private string _directoryId;
        public virtual string DirectoryId
        {
            get
            {
                return this._directoryId;
            }
            set
            {
                this._directoryId = value;
            }
        }

        private string _directoryFullName;
        public virtual string DirectoryFullName
        {
            get
            {
                return this._directoryFullName;
            }
            set
            {
                this._directoryFullName = value;
            }
        }

I need to customize Dataannotations to set display name & validations for every property. According telerik documentation, I'm declaring another partial class for original generated fluent Directory class to decorate it with MetadataType, like following:

[MetadataType(typeof(Directory.DirectoryMetadata))]
public partial class Directory
{
    internal sealed class DirectoryMetadata
    {
        public DirectoryMetadata()
        {
        }

        [Display(Name = "Id Directorio")]
        [Required()]
        public string DirectoryId
        { get; set; }

        [Display(Name = "Nombre Completo")]
        [Required()]
        public string DirectoryFullName
        { get; set; }

When I run asp.net core app, MetadataType is not working, no display name nor validator works. However, for some reason, decorating original generated fluent class works fine!:

public partial class Directory
{
    private int _id;
    public virtual int Id
    {
        get
        {
            return this._id;
        }
        set
        {
            this._id = value;
        }
    }

    private string _directoryId;
    [Display(Name = "Id Directorio")]
    [Required()]
    public virtual string DirectoryId
    {
        get
        {
            return this._directoryId;
        }
        set
        {
            this._directoryId = value;
        }
    }

    private string _directoryFullName;
    [Display(Name = "Nombre Completo")]
    [Required()]
    public virtual string DirectoryFullName
    {
        get
        {
            return this._directoryFullName;
        }
        set
        {
            this._directoryFullName = value;
        }
    }

Both classes, Original and metadata are in the same namespace. In fact, declaring Directory metadata class into a separate file instead internal doesn't work also.

Please, need your help!

Answer 1

我自己找到了解决方案。

对于Asp.Net核心项目，我必须使用 ModelMetadataTypeAttribute 而不是 Microsoft.AspNetCore.Mvc.Core 程序集中的 MetadataTypeAttribute 。装饰元数据类（伙伴类）遵循使用Display（...），DisplayName（...）的相同方法，对于验证器也是如此。无论伙伴类（元数据类）是位于模型类的外部还是内部。

然而，将MetadataTypeAttribute直接与模型类而不是伙伴类一起使用，效果非常好！

我能解释的唯一解释是新出现的Microsoft Asp.Net核心技术，DLL过程和功能的重新定位。

MetadataType Attribute are being ignored Telerik.AccessData.Core 2016.1.224 fluent mapping

1 个答案: