如何从另一种形式访问一种形式的属性? [英] How to access one form's property from another?

问题描述

我有2个WinForms，在 Form1 中，我声明了这一点:

I have 2 WinForms, in Form1 I declared this:

public int NumberOfContacts { get; set; }

我需要从 Form2 访问该属性.

推荐答案

这是一个有关从另一个表单中加入Form成员的常见问题，我假设您要从Form1的当前活动实例中访问NumberOfContacts，在那样的话，您就可以简单地完成，就像您在自己的声明中所做的一样:

This is a usual question concerning acceding a Form's member from an other form, I will assume that you want to access NumberOfContacts from the currect active instance of Form1, in that case you would simply , and just as you did declare in your :

Form1 :

 public partial class Form1 : Form
    {
        public int NumberOfContacts { get; set; }
        public Form1()
        {
            InitializeComponent();
        }
    }

和 Form2 中:

public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            // ActiveForm will give you access to the current opened/activated Form1 instance
            var numberOfContacts  = ((Form1) Form1.ActiveForm).NumberOfContacts;
        }
    }

这应该有效.

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