Getting collection of all members of a class

Question

I want to get the collection of all the members that are present in a class. How do I do that? I am using the following, but it is giving me many extra names along with the members.

Type obj  =  objContactField.GetType();
MemberInfo[] objMember = obj.GetMembers();
String name = objMember[5].Name.ToString();

Do you mean you want all methods? Members include things like properties and fields. — George Duckett, Jul 21 '11 at 09:16
When you write a question, there is preview field below where you can see if things are properly formatted as code etc. I saw that you had tried some formatting, but looking at the preview it didn't show up as code. — Anders Abel, Jul 21 '11 at 09:17
Sanchaita, please accept the answer that worked best for you to properly reward the time the person put into answering. Thank you! :) — Marcus Mangelsdorf, Jan 22 '16 at 12:24

score 18 · Answer 1 · edited Aug 16 '19 at 19:46

18

Get a collection of all the properties of a class and their values:

class Test
{
    public string Name { get; set; }
}

Test instance = new Test();
Type type = typeof(Test);

Dictionary<string, object> properties = new Dictionary<string, object>();
foreach (PropertyInfo prop in type.GetProperties())
    properties.Add(prop.Name, prop.GetValue(instance));

Note that you will need to add using System.Collections.Generic; and using System.Reflection; for the example to work.

edited Aug 16 '19 at 19:46

theduck

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answered Jul 21 '11 at 09:19

dknaack

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Yes this is what i am getting – Sanchaita Chakraborty Jul 21 '11 at 09:22
2

I've made a short *dotnetfiddle* to demonstrate the usage: https://dotnetfiddle.net/qcWcGA – Marcus Mangelsdorf Jan 25 '16 at 08:41
This works for properties, but it does not work for ordinary members because MemberInfo does not have a GetValue method. – Throw Away Account Nov 20 '18 at 04:01

score 9 · Answer 2 · answered Apr 27 '13 at 06:54

From msdn, members of a class include:

Fields

Constants (comes under Fields)

Indexers (comes under Properties)

Constructors

Destructors

Nested Types

When you do GetMembers on a class you get all of these (including static ones defined on the class like static/const/operator, not to mention the instance ones) of that class and the instance members of the classes it inherited (no static/const/operator of base classes) but wouldn't duplicate the overridden methods/properties.

To filter out, you have GetFields, GetProperties, GetMethods, and for greater flexibility, there is FindMembers

score 3 · Answer 3 · answered Jul 21 '11 at 09:20

3

Well, it depends a little on what you get. For example:

   static void Main(string[] args)
    {
        Testme t = new Testme();
        Type obj = t.GetType();

        MemberInfo[] objMember = obj.GetMembers();

       foreach (MemberInfo m in objMember)
       {
           Console.WriteLine(m);
       } 
    }


    class Testme
    {
        public String name;
        public String phone;
    }

Returns

System.String ToString()
Boolean Equals(System.Object)
Int32 GetHashCode()
System.Type GetType()
Void .ctor()
System.String name
System.String phone

Which is what I expected, remember, just because your class inherits from somewhere, there are other things provided by default.

answered Jul 21 '11 at 09:20

BugFinder

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Yes this is what i am getting – Sanchaita Chakraborty Jul 21 '11 at 09:22
Int32 GetHashCode() Void .ctor() I got these fields along with the proper fields – Sanchaita Chakraborty Jul 21 '11 at 09:25
1

But thats exactly what you should! – BugFinder Jul 21 '11 at 10:02
An interesting variation of this problem: is there any way of obtaining the second last TestMe class that has been created so far? – BenKoshy Nov 04 '15 at 02:54
You mean you want to tell what instances of testme have been made and the one before last? – BugFinder Nov 08 '15 at 11:57

score 0 · Answer 4 · edited Dec 23 '20 at 14:31

Linqpad Demo Program

To make it easy to understand what the code from dknaack does i created a linqpad demo program

void Main()
{
   User instance = new User();
   Type type = typeof(User);

   Dictionary<string, object> properties = new Dictionary<string, object>();
   foreach (PropertyInfo prop in type.GetProperties())
         properties.Add(prop.Name, prop.GetValue(instance));
   properties.Dump();    
}

// Define other methods and classes here        
class User
{
    private string foo;
    private string bar { get; set;}
    public int id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public System.DateTime Dob { get; private set; }
    public static int AddUser(User user)
    {    
        // add the user code
        return 1;
    }
}

Getting collection of all members of a class

4 Answers4

Linqpad Demo Program

Linked