WPF获取窗口句柄，初始化的时候需要提供窗口的句柄

[njit_77]

WindowInteropHelper wndHelper = new WindowInteropHelper(this);

handle = wndHelper.Handle;
我从网上搜的，都说这个是获取窗口的句柄。但是为什么程序运行时handle的值是0。有个回答说是在loaded事件中获取句柄。
this.Loaded+=Win_Load(oject e ,event e)
{
//在这里写你刚才那3个代码
}
请问：
1、loaded事件中获取句柄是这样吗?
private void Window_Loaded(object sender, RoutedEventArgs e)
{
WindowInteropHelper wndHelper = new WindowInteropHelper(this);

handle = wndHelper.Handle;
}
我这样做了，但是运行时，
public MainWindow()
{
InitializeComponent();

//this.Loaded += Window_Loaded(object sender, RoutedEventArgs e);
//IntPtr handle = new WindowInteropHelper(this).Handle;
Camera.Camera_Init(ref handle);
}
handle的值还是0。
我该如何修改代码吗？是我哪里没有理解到位?
请大神帮忙解惑，最好能付个正确的代码。

[njit_77]

求大神帮助啊

[njit_77]

没人知道吗？

[IE11下面经常卡到爆]

try.. private void Window_Loaded(object sender, RoutedEventArgs e) { WindowInteropHelper wndHelper = new WindowInteropHelper(this); handle = wndHelper.Handle; Camera.Camera_Init(ref handle); } public MainWindow() { InitializeComponent(); this.Loaded += Window_Loaded(object sender, RoutedEventArgs e); }

[IE11下面经常卡到爆]

this.Loaded += Window_Loaded;

[njit_77]

这句是什么意思啊this.Loaded += Window_Loaded 加上这句为什么就可以？能不能解释下，新人不太明白

[njit_77]

引用 3 楼 dongxinxi 的回复:

try.. private void Window_Loaded(object sender, RoutedEventArgs e) { WindowInteropHelper wndHelper = new WindowInteropHelper(this); handle = wndHelper.Handle; Camera.Camera_Init(ref handle); } public MainWindow() { InitializeComponent(); this.Loaded += Window_Loaded(object sender, RoutedEventArgs e); }

private void Window_Loaded(object sender, RoutedEventArgs e) { WindowInteropHelper wndHelper = new WindowInteropHelper(this); handle = wndHelper.Handle; } public MainWindow() { InitializeComponent(); this.Loaded += Window_Loaded(object sender, RoutedEventArgs e); Camera.Camera_Init(ref handle); } 为什么这样写就不行？ this.Loaded += Window_Loaded(object sender, RoutedEventArgs e);这个初始化之后handle不就应该有值了吗？