如何获取 DataAnnotation 显示名称列表 [重复]答案

【问题标题】：How to get a List of DataAnnotation Display Name [duplicate]如何获取 DataAnnotation 显示名称列表 [重复]
【发布时间】：2018-04-13 09:45:09
【问题描述】：

我有一个带有数据注释的类，需要从 Display 和属性 Name 中获取字符串列表。

我已经尝试了一些方法。在方法 GetAttributesNames() 中。

internal class TVSystemViewData : BaseViewData
        {
            [Display(Name = "BoxType", Description = "")]
            public String BoxType { get; set; }

            [Display(Name = "BoxVendor", Description = "")]
            public String BoxVendor { get; set; }

            [Display(Name = "ClientId", Description = "")]
            public String ClientId { get; set; }

            [Display(Name = "HostName", Description = "")]
            public String HostName { get; set; }

            [Display(Name = "OSVersion", Description = "")]
            public String OSVersion { get; set; }
            [Display(Name = "SerialNumber", Description = "")]
            public String SerialNumber { get; set; }


            internal void GetAttributesNames()
            {
                var listOfFieldNames = typeof(TVSystemViewData)
                .GetProperties()
                .Select(x =>  x.GetCustomAttributes(typeof(DisplayAttribute), true))
                .Where(x => x != null)
                .ToList();

            }
}

【问题讨论】：

那么这有什么作用或没有作用？您必须将属性转换为 DisplayAttribute 才能访问其 Name 属性。

标签： c# .net data-annotations

【解决方案1】：

这可能会有所帮助

internal List<string> GetAttributesNames()  //changed type returned
    {
        return  typeof(TVSystemViewData)
          .GetProperties()                //so far like you did
          .SelectMany(x=>x.GetCustomAttributes(typeof(DisplayAttribute),true) //select many because can have multiple attributes
          .Select(e=>((DisplayAttribute)e))) //change type from generic attribute to DisplayAttribute
          .Where(x => x != null).Select( x => x.Name) //select not null and take only name
          .ToList(); // you know ;)
    }

希望对你有帮助

【讨论】：

【解决方案2】：

试试这个：

class Program
{
    static void Main(string[] args)
    {
        var data = new TVSystemViewData();

        var listOfDisplayNames = data.GetAttributesNames();
    }
}

internal class TVSystemViewData
{
    [Display(Name = "XXXXX", Description = "")]
    public String BoxType { get; set; }

    [Display(Name = "BoxVendor", Description = "")]
    public String BoxVendor { get; set; }

    [Display(Name = "ClientId", Description = "")]
    public String ClientId { get; set; }

    [Display(Name = "HostName", Description = "")]
    public String HostName { get; set; }

    [Display(Name = "OSVersion", Description = "")]
    public String OSVersion { get; set; }
    [Display(Name = "SerialNumber", Description = "")]
    public String SerialNumber { get; set; }

    internal List<string> GetAttributesNames()
    {
        return typeof(TVSystemViewData)
            .GetProperties()
            .Select(x => ((DisplayAttribute) x.GetCustomAttribute(typeof(DisplayAttribute), true)).Name)
            .ToList();
    }
}

【讨论】：