绑定的WPF控件的自定义属性的类型 [英] Bind WPF control with property of custom type

问题描述

我想一个标签的内容属性绑定到一些自定义的类型我有一个属性;不幸的是，我也没弄清楚如何做到这一点，这就是为什么我在这里：）

I'm trying to bind a Label's 'Content' property to a property from some custom type I have; unfortunately, I didn't figure out how to do it, and that's why I'm here :)

让我们假设我有以下类型（可以在同一个命名空间作为我的WPF窗口包含标签或不同的命名空间）：

Let's assume that I have the following type (can be in the same namespace as my WPF Window that contains the Label or different namespace):

namespace MyNS
{
    pubic class Person
    {
        private int age = 0;

        public int Age
        {
            get { return age; }
        }

        public void GetOlder
        {
            age++;
        }
    }
}

1）如何绑定我的标签我为'年龄'属性？

1) How to I bind my Label to 'Age' property?

2）在运行时，我将创建'人'的实例;我想确保我的标签绑定到正确的实例;也就是说，如果我叫：

2) At runtime I will create an instance of 'Person'; I want to make sure that my Label is bound to the right instance; i.e. if I called:

Person SomePerson = new Person();
SomePerson.GetOlder();

我希望我的标签，可以有'年龄'属性'SomePerson'的新值。

I want my Lable to have the new value of 'Age' property for 'SomePerson'.

3）如果我叫'GetOlder在不同的线程（无论使用调度线程或BackgroundWorker的）？我仍然会得到时代的最新值？还是我必须考虑一些其他的东西护理以及使这种情况可能吗？

3) What if I called 'GetOlder' in different thread (whether using Dispatcher thread or BackgroundWorker)? Will I still get the latest value of 'Age'? Or do I have to take care of some other things as well to make this scenario possible?

由于提前，

TheBlueSky

TheBlueSky

推荐答案

这竟然是一种简单的事情，我不知道为什么没有人回答了:)无论如何，这里有答案：

It turned out to be kind of straightforward thing, I wonder why nobody answered it :) Anyway, here are the answers:

1）首先，我们需要创建Person类是这样的：

1) First we need to create our Person class like this:

using System.ComponentModel;

namespace MyNS
{
    pubic class Person : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        private int age = 0;

        public int Age
        {
            get { return age; }
            set
            {
                age = value;
                OnPropertyChanged("Age");
            }
        }

        protected void OnPropertyChanged(string PropertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(PropertyName));
            }
        }

        public void GetOlder
        {
            Age++;
        }
    }
}

2）然后我们我们的WPF控件绑定到Person.Age财产是这样的：

2) Then we bind our WPF control to Person.Age property like this:

using System.Windows.Data;

//...

Person p = new Person();
Binding ageBinding = new Binding("Age");
ageBinding.Source = p;
MyWpfLabelControl.SetBinding(Label.ContentProperty, ageBinding);

现在，每当p.GetOlder（）被调用MyWpfLabelControl.Content将变更为新的p.Age值。

Now whenever p.GetOlder() is called MyWpfLabelControl.Content will change to the new p.Age value.

3）在多线程的，故事是没有什么不同;调用p.GetOlder（）在不同的线程时，它会以同样的方式：

3) In multi-threading, the story is not different; it'll work the same way when calling p.GetOlder() in a different thread:

new Thread(
    new ThreadStart(
        delegate() {
            p.GetOlder();
        }
)).Start();

希望这有助于。

TheBlueSky

TheBlueSky

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