数据注释本地化

model

[MetadataType(typeof(UserMetaData))]
public class User
{
    public int Id { get; set; }
    public string UserName { get; set; }
}

public class UserMetaData
{
    public int Id { get; set; }

    [Required(ErrorMessageResourceType = typeof(Resources.ModelValidation), ErrorMessageResourceName = "UserNameRequired")]
    [LocalizedDisplayNameAttribute("UserName", NameResourceType = typeof(Resources.ModelValidation))]
    public string UserName { get; set; }
}

view

@using (Html.BeginForm())
{
    <div>
        @Html.LabelFor(x => x.UserName)
        @Html.TextBoxFor(x => x.UserName)
        @Html.ValidationMessageFor(x => x.UserName)
    </div>
    <div>
        <input type="submit" value="Gönder" />
    </div>
}

本地化显示名称属性

public class LocalizedDisplayNameAttribute : DisplayNameAttribute
{
    private PropertyInfo _nameProperty;
    private Type _resourceType;

    public LocalizedDisplayNameAttribute(string displayNameKey)
        : base(displayNameKey)
    { }

    public Type NameResourceType
    {
        get { return _resourceType; }
        set
        {
            _resourceType = value;
            //initialize nameProperty when type property is provided by setter  
            _nameProperty = _resourceType.GetProperty(base.DisplayName, BindingFlags.Static | BindingFlags.Public);
        }
    }
    public override string DisplayName
    {
        get
        {              
            //check if nameProperty is null and return original display name value  
            if (_nameProperty == null) { return base.DisplayName; }
            return (string)_nameProperty.GetValue(_nameProperty.DeclaringType, null);
        }
    }
}

资源文件

output

requiredAttribute 本地化有效，但 LocalizedDisplayNameAttribute 无效。我找不到任何解决方案来解决这个问题。

有什么建议吗，缺失在哪里？

你似乎正在用这个重新发明轮子LocalizedDisplayNameAttribute属性。此功能已内置于框架中，直接内置于[Display]您可以直接使用的属性：

public class UserMetaData
{
    public int Id { get; set; }

    [Required(ErrorMessageResourceType = typeof(Resources.ModelValidation), ErrorMessageResourceName = nameof(Resources.ModelValidation.UserNameRequired)]
    [Display(ResourceType = typeof(Resources.ModelValidation), Name = nameof(Resources.ModelValidation.UserName))]
    public string UserName { get; set; }
}

至于为什么你的轮子重塑不起作用，嗯，不能肯定地说。当你无论如何都可以摆脱它时为什么要关心它呢？