Question

I have been trying to work out how to call a method in a different class. Both classes are created dynamically at run-time. Most of the issues I have seen here relate to inheritance, which is different from what I have (I think.)

I am still fairly new to C#, and am trying to test some concepts out.

The first class is something like this:

public class Record
{
    CustomPanel _panel;

    public void recordFunc(){}
}

The internally created class has something like this:

public class CustomPanel : Panel
{
    List<Control> _myControls = new List<Control>;
    // _myControls[0] += new EventHandler(myFunc);

    public void myFunc(object sender, EventArgs e)
    {
        // parentClass.recordFunc();
    }
}

My objective is to create a Record at run-time from a database call. At that point, it creates a Panel (from my CustomPanel class) that gets added to a FlowLayoutControl. When events are fired from the panel’s internal controls, I need to have it update parts of the parent Record class.

Any help is greatly appreciated.

Answer 1

I’m not 100% sure what you’re asking, but it seems you want to know how to call a function on a class, when you don’t know the class type at runtime, but it could be one or many record types. Is that correct?

If so, a way to cleanly achieve the above is to implement an interface on your derived types and call the interface method. For instance, if you have multiple “Record” classes and don’t know the type at runtime, try the following:

public interface IRecord 
{
    void RecordFunc();
} 

public class ARecord : IRecord
{
    public void RecordFunc()
    {
        Console.WriteLine("ARecord.RecordFunc");
    }
}

public class AnotherRecord : IRecord
{
    public void RecordFunc()
    {
        Console.WriteLine("AnotherRecord.RecordFunc");
    }
}

public class CustomPanel : Panel
{    
    private IRecord _parentRecord;

    // Where parentRecord could be ARecord or AnotherRecord
    public class CustomPanel(IRecord parentRecord)
    {
        _parentRecord = parentRecord;
    }

    public void MyFunc(object sender, EventArgs e)
    {
        _parentRecord.RecordFunc();
    }
}

If that’s not what you’re looking for, please clarify.