using System;

using System.ComponentModel.DataAnnotations;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var obj = new Student()

        {

            Name = "王大明",

            Birthday = DateTime.Now

        };

​

        Console.WriteLine(obj.GetAttributeFrom<DisplayAttribute>(nameof(Student.Name)).Name);

        Console.WriteLine(obj.Name);

        Console.WriteLine(obj.GetAttributeFrom<DisplayAttribute>(nameof(Student.Birthday)).Name);

        Console.WriteLine(obj.Birthday);

    }

​

    public class Student

    {

        [Display(Name = "姓名")]

        public string Name { get; set; }

​

        [Display(Name = "生日")]

        public DateTime Birthday { get; set; }

    }

}

​

public static class ObjectExtension

{

    public static T GetAttributeFrom<T>(this object instance, string propertyName) where T : Attribute

    {

        var attributeType = typeof(T);

        var property = instance.GetType().GetProperty(propertyName);

        if (property == null) return default(T);

        return (T) property.GetCustomAttributes(attributeType, false).FirstOrDefault();

    }

}