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Class: Property Attributes

I created a custom attribute.

public class DisplayAttribute : Attribute
    {
        public bool IsDisplay;
        public string DisplayName;

        public DisplayAttribute()
        {
            IsDisplay = true;
            DisplayName = string.Empty;
        }

        public DisplayAttribute(bool isDisplay)
        {
            IsDisplay = isDisplay;
            DisplayName = string.Empty;
        }

        public DisplayAttribute(string displayName)
        {
            IsDisplay = true;
            DisplayName = displayName;
        }

        public DisplayAttribute(bool isDisplay,string displayName)
        {
            IsDisplay = isDisplay;
            DisplayName = displayName;
        }
    }

My motive for creating this attribute was to restrict the property so that it appears when I retrieve a list of properties from a specific class

Here is my class

 public class tblContacts : Connection
    {
        [Display(false)]
        public int ContactId { get; set; }

        [Display(true,"Category Name")]
        public string CategoryName { get; set; }

        [Display("First Name")]
        public string FirstName { get; set; }
    }

but when I execute the following instruction

tblContacts obj=new tblContacts();
obj.GetType().GetProperties();

he does not satisfy the motive

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1 answer

This is a job for me. See System.Reflection.BindingFlags for more information.

using System;
using System.Reflection;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Type myType = (typeof(tblContacts));
            PropertyInfo[] myPropertyInfo = myType.GetProperties(BindingFlags.Public | BindingFlags.Instance);
            Console.WriteLine("The number of public properties is {0}.", myPropertyInfo.Length);

            // Display the public properties.
            DisplayPropertyInfo(myPropertyInfo);

            // Get the nonpublic properties.
            PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.NonPublic | BindingFlags.Instance);
            Console.WriteLine("The number of protected properties is {0}.", myPropertyInfo1.Length);

            // Display all the nonpublic properties.
            DisplayPropertyInfo(myPropertyInfo1);
        }
        public static void DisplayPropertyInfo(PropertyInfo[] myPropertyInfo)
        {

            // Display information for all properties. 
            for (int i = 0; i < myPropertyInfo.Length; i++)
            {
                PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo[i];
                Console.WriteLine("The property name is {0}.", myPropInfo.Name);
                Console.WriteLine("The property type is {0}.", myPropInfo.PropertyType);
            }
        }
    }

    public class DisplayAttribute : Attribute
    {
        public bool IsDisplay;
        public string DisplayName;

        public DisplayAttribute()
        {
            IsDisplay = true;
            DisplayName = string.Empty;
        }

        public DisplayAttribute(bool isDisplay)
        {
            IsDisplay = isDisplay;
            DisplayName = string.Empty;
        }

        public DisplayAttribute(string displayName)
        {
            IsDisplay = true;
            DisplayName = displayName;
        }

        public DisplayAttribute(bool isDisplay, string displayName)
        {
            IsDisplay = isDisplay;
            DisplayName = displayName;
        }
    }
    public class tblContacts
    {
        [Display(false)]
        public int ContactId { get; set; }

        [Display(true, "Category Name")]
        public string CategoryName { get; set; }

        [Display("First Name")]
        public string FirstName { get; set; }
    }
}

OUTPUT:

The number of public properties is 3.
The property name is ContactId.
The property type is System.Int32.
The property name is CategoryName.
The property type is System.String.
The property name is FirstName.
The property type is System.String.
The number of protected properties is 0.
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