asp.net-mvc - 数据注释本地化

Question

模型

[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; }
}

看法

@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

输出

RequiredAttribute 本地化有效，但 LocalizedDisplayNameAttribute 不起作用。我找不到任何解决方案来解决这个问题。

任何建议，失踪在哪里？

Answer 1

您似乎正在使用此LocalizedDisplayNameAttribute属性重新发明轮子。此功能已内置到框架中，直接嵌入到[Display]您可以直接使用的属性中：

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; }
}

至于为什么你的车轮改造不起作用，好吧，不能肯定地说。无论如何，当你可以摆脱它时，为什么要关心它。