如何从 C# 中的另一个类访问一个变量？

Question

I am new in C# so I know it's a rookie question. I've been searching on this site similar questions but didn't find any.

I have two forms: MainForm and EditForm . MainForm has a class instance like in this code:

       public partial class Form1 : Form
    {
        ...
        RSSSourcesLibrary NewsSourcesCollection = new RSSSourcesLibrary();
        ...
    }

(the RSSSourcesLibrary class is defined somewhere else, in a third file)

How can I access NewsSourcesCollection from EditForm ?

Answer 1

Since you are creating the EditForm from the MainForm, you need to mark it as owner (enabling you to access the owner property from EditForm), while creating it in MainForm

Creating EditForm in MainForm

EditForm editForm = new EditForm();
editForm.ShowDialog(this);

Accessing from Edit Form

var value = ((MainForm)this.Owner).NewsSourcesCollection;

Where NewsSourcesCollection is declared as Public Property in MainForm