Get a value from a non-public member

Question

Hello all,

I am trying to access a loaded third party object that I need to pull information out of it. I can’t figure out how to get/pull a value deep in the object under the Non-Public Members area.

Here is what I mean.

customer→ “Non-Public members” → m_customerModel ->UserDefinedFlds→ UsrDfnd1 that has value of “Hello There” that I am looking for.

From Debug->Watch and entering the following I get the value am looking for but can’t figure out how to put in a var..

cusled.m_customerModel.UserDefinedFlds.UsrDfnd1

Any suggestions on how I can get this into the var?.

Thanks everyone…

SCG

Answer 1

Hi @SCG , Welcome to Microsoft Q&A,

In C#, if you need to access non-public members of an object, you usually use reflection. Through reflection, you can access private fields, properties, or methods of a class.

using System;
using System.Reflection;

class Program
{
    static void Main()
    {
        var customer = new Customer();// Assume you have a Customer object
        Type customerType = customer.GetType();
        
        // Get the value of the m_customerModel field
        var mCustomerModelField = customerType.GetField("m_customerModel", BindingFlags.NonPublic | BindingFlags.Instance);
        var mCustomerModelValue = mCustomerModelField.GetValue(customer);

        // Get the value of the UserDefinedFlds field
        var userDefinedFldsField = mCustomerModelValue.GetType().GetField("UserDefinedFlds", BindingFlags.NonPublic | BindingFlags.Instance);
        var userDefinedFldsValue = userDefinedFldsField.GetValue(mCustomerModelValue);

        // Get the value of the UsrDfnd1 field
        var usrDfnd1Field = userDefinedFldsValue.GetType().GetField("UsrDfnd1", BindingFlags.NonPublic | BindingFlags.Instance);
        var usrDfnd1Value = usrDfnd1Field.GetValue(userDefinedFldsValue);

        Console.WriteLine(usrDfnd1Value); // Output: Hello There
    }
}

Best Regards,

Jiale

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Answer 2

using System;

using System.Reflection;

class Program

{

static void Main()

{

    var customer = new Customer(); // Assuming you have a Customer object

    Type customerType = customer.GetType();

    

    // Get the value of the m_customerModel field

    var mCustomerModelField = customerType.GetField("m_customerModel", BindingFlags.NonPublic | BindingFlags.Instance);

    var mCustomerModelValue = mCustomerModelField.GetValue(customer);

    // Get the value of the UserDefinedFlds property

    var userDefinedFldsProperty = mCustomerModelValue.GetType().GetProperty("UserDefinedFlds", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

    var userDefinedFldsValue = userDefinedFldsProperty.GetValue(mCustomerModelValue);

    // Get the value of the UsrDfnd1 property

    var usrDfnd1Property = userDefinedFldsValue.GetType().GetProperty("UsrDfnd1", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

    var usrDfnd1Value = usrDfnd1Property.GetValue(userDefinedFldsValue);

    Console.WriteLine(usrDfnd1Value); // Outputs: HELLO THERE

}

}