Reflection. Attributes

Question

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication4 { class Program { static void Main(string[] args) { Man man = new Man("Anton", 30, "Blue"); Cat cat = new Cat("Мяу", "White", 5); Console.WriteLine("Свойства объекта " + man.GetType() + " :"); ColorProperty.ColorPrint(man); Console.WriteLine("\n"); Console.WriteLine("Свойства объекта " + cat.GetType() + " :"); ColorProperty.ColorPrint(cat); } } class Man { public string Name { get; set; } private int Age; [ColorProperty(ConsoleColor.Blue)] public string Eyes { get; set; } public Man(string name, int age, string color) { Name = name; Age = age; Eyes = color; } } class Cat { [ColorProperty(ConsoleColor.Yellow)] public string Name { get; set; } [ColorProperty(ConsoleColor.Red)] public string Color { get; set; } private int Age; public Cat(string name, string color, int age) { Name = name; Color = color; Age = age; } } [AttributeUsage(AttributeTargets.Property)] class ColorPropertyAttribute : System.Attribute { public ColorPropertyAttribute(ConsoleColor color) { Color = color; } public ConsoleColor Color { get; private set; } } class ColorProperty { public static void ColorPrint(object obj) { Type t = obj.GetType(); object[] p = t.GetProperties(); foreach (object pr in p) { Console.WriteLine(pr); } } } }

Hello! How in this code to display all property values, and paint them in colors according to the applied attributes?

Accepted Answer · 2016-05-26T16:34:14

For example, something like this:

 public static void ColorPrint(object obj) { PropertyInfo[] props = obj.GetType().GetProperties(); ConsoleColor oldColor = Console.ForegroundColor; foreach (var pinfo in props) { ColorPropertyAttribute colorAttr = pinfo.GetCustomAttribute<ColorPropertyAttribute>(); if (colorAttr != null) Console.ForegroundColor = colorAttr.Color; object propValue = pinfo.GetValue(obj); Console.WriteLine(propValue); if (colorAttr != null) Console.ForegroundColor = oldColor; } }

@Grundy: Because properties without an attribute are possible, and they should be displayed in the default color.

Reflection. Attributes

1 answer 1

More articles: