'Implement form parts in different classes

I have a main window with two buttons (this is a simplified description). A click on a button opens another form. Both buttons open different forms.

I'd like to move the content of the two sub forms to the main window and switch between them using a TabControl, but I don't want to move the complete code to the main window class.

How can I keep the code separated? One idea I had is to create two user controls, instead of the two sub forms. Are there other/better options?

c++sharpformscontrols


Solution 1:[1]

If you want to move the sub-forms initially, before the user may change the values of their components, you could as well put that functionality into the partial class the rest of the main-form (in this example Form1) is in, just with yet another file. More on partial classes

Otherwise, you could do something like this:

public Form1() {
    InitializeComponent();
    SubForm1 sub1 = new SubForm1();
    this.tabPage1.Controls.Add(sub1.button1);
    this.tabPage1.Controls.Add(sub1.button2);
    SubForm2 sub2 = new SubForm2();
    this.tabPage2.Controls.Add(sub2.label1);
    this.tabPage2.Controls.Add(sub2.checkBox1);
}

You will have to make sure every control in the sub-forms is public.

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