C# Eval function?

In C# you can use reflection to both create an object dynamically and to access its properties. Here's a quick example:

using System;
using System.Reflection;

class Program
{
    static void Main()
    {
        Type t = typeof(Client);
        object oClient = Activator.CreateInstance(t, new object[]{"Ricky"});
        BindingFlags bf = BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty;
        string name = (string)t.InvokeMember("Name", bf, null,oClient,null);
        Console.WriteLine("The name of the client is {0}", name);
        Console.ReadLine();
    }
}

class Client
{
private string name;

    public string Name
    {
        get{ return name;}
        set{ name = value;}
    }

    public Client(string name)
    {
        this.name = name;
    }
}

As you can see, the code to do this is rather tedious though it should get better in C# 4.0 where some special syntax to deal with 'dynamic lookup' is planned :)

2 Replies

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Vijaya Kadiyala18y ago
Hi,

Check out the below link

http://www.sitepoint.com/forums/showthread.php?t=382345

Thanks -- Vj

http://dotnetvj.blogspot.com
Alan18y ago
In C# you can use reflection to both create an object dynamically and to access its properties. Here's a quick example:

using System;
using System.Reflection;

class Program
{
    static void Main()
    {
        Type t = typeof(Client);
        object oClient = Activator.CreateInstance(t, new object[]{"Ricky"});
        BindingFlags bf = BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty;
        string name = (string)t.InvokeMember("Name", bf, null,oClient,null);
        Console.WriteLine("The name of the client is {0}", name);
        Console.ReadLine();
    }
}

class Client
{
    private string name;

    public string Name
    {
        get{ return name;}
        set{ name = value;}
    }

    public Client(string name)
    {
        this.name = name;
    }
}

As you can see, the code to do this is rather tedious though it should get better in C# 4.0 where some special syntax to deal with 'dynamic lookup' is planned :)