How do I open a new form with specifications based on the button clicked on parent form?

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Sorry if the question is a bit off, still a newbie in programming. I can't seem to describe it in 1 question.

I'm trying to simplify my program by just using 1 form for 3 functions (Add, Edit, View). Now with those 3 functions, the only difference is that, Edit and View have textboxes disabled in them.

I'm having trouble internalizing on how I should approach this one. I'm using a combobox as a menu. I've specified the buttons to open specific forms based on what menu it is on.

My plan was to put a value on a variable in the parent form when the button is clicked and call it on the child form as a basis if the fields should be enabled or not. But, I can't seem to call it from the parent form.

What I have tried:

Tried calling a variable from parent form but can't seem to call it.

Posted 20-May-18 16:44pm

User 12225285

Updated 20-May-18 18:59pm

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BillWoodruff 21-May-18 0:14am

I'm confused: you say you are: "using 1 form for 3 functions" ... then, you talk about creating other Forms.

Please clarify your application design.

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OriginalGriff · Answer 1 · 2018-05-20T19:00:00

It's not difficult, really!
Create an enum in Form2:

C#

public enum FormFunction
    {
    Add,
    Edit,
    View
    }

Then change the Form2 constructor to accept an instance of the enum:

C#

public Form2(FormFunction function)
    {
    InitializeComponent();
    switch (function)
        {
        case FormFunction.Add:
            ...
            break;
        case FormFunction.Edit:
            ...
            break;
        case FormFunction.View:
            ...
            break;
        default: throw new ArgumentOutOfRangeException("Unknown FormFunction: " + function);
        }
    }

And construct it using the new constructor:

Form2 f = new Form2(Form2.FormFunction.Edit);

You can then modify your controls state and visibility as required.