WPF：绑定后的Window SizeChanged事件(WPF: Window SizeChanged event after binding)

程序员大家好，

我用数据绑定的数据网格和东西制作了一个相当复杂的WPF应用程序。由于内容动态变化，窗口本身也会调整大小（正如它应该做的那样）。我做了一个函数，当大小改变时，窗口与主屏幕的中心对齐，如下所示：

this.SizeChanged += delegate { double screenWidth = SystemParameters.PrimaryScreenWidth; double screenHeight = SystemParameters.PrimaryScreenHeight; double windowWidth = this.Width; double windowHeight = this.Height; this.Left = ( screenWidth / 2 ) - ( windowWidth / 2 ); this.Top = ( screenHeight / 2 ) - ( windowHeight / 2 ); };

它像我怀疑的那样工作。但是，由于内容是数据绑定的，因此在内容可用之前大约需要1/4秒。上面的SizeChanged事件已经完成了它的工作，因此窗口根本不居中。

我可以在触发事件之前实现某种超时而不会锁定所有内容吗？

耐心等待你的回答！

Hello fellow programmers,

I've made a rather complicated WPF application with data bound datagrids and stuff. Since the content changes dynamically, the window itself resizes as well (as it's supposed to do). I made a function which aligns the window to the center of the primary screen when the size changes, like this:

this.SizeChanged += delegate { double screenWidth = SystemParameters.PrimaryScreenWidth; double screenHeight = SystemParameters.PrimaryScreenHeight; double windowWidth = this.Width; double windowHeight = this.Height; this.Left = ( screenWidth / 2 ) - ( windowWidth / 2 ); this.Top = ( screenHeight / 2 ) - ( windowHeight / 2 ); };

It works like I suspected it to. However, since the content is data bound, it takes roughly 1/4th a second before the content is available. The SizeChanged event above already did it's job by that time, so the window is not centered at all.

Can i implement some sort of timeout before the event is triggered without locking everything up?

Awaiting your responses patiently!

最满意答案

只是一个猜测，但其中一个可能工作

this.SizeChanged += delegate { Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)delegate() { double screenWidth = SystemParameters.PrimaryScreenWidth; double screenHeight = SystemParameters.PrimaryScreenHeight; double windowWidth = this.Width; double windowHeight = this.Height; this.Left = (screenWidth / 2) - (windowWidth / 2); this.Top = (screenHeight / 2) - (windowHeight / 2); }); }; this.SizeChanged += delegate { ThreadPool.QueueUserWorkItem((o) => { Thread.Sleep(100); //delay (ms) Dispatcher.Invoke(DispatcherPriority.Background, (Action)delegate() { double screenWidth = SystemParameters.PrimaryScreenWidth; double screenHeight = SystemParameters.PrimaryScreenHeight; double windowWidth = this.Width; double windowHeight = this.Height; this.Left = (screenWidth / 2) - (windowWidth / 2); this.Top = (screenHeight / 2) - (windowHeight / 2); }); }); };

就像我说的那样，因为我没有设置来复制数据加载延迟

Just a guess but one of these may work

this.SizeChanged += delegate { Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)delegate() { double screenWidth = SystemParameters.PrimaryScreenWidth; double screenHeight = SystemParameters.PrimaryScreenHeight; double windowWidth = this.Width; double windowHeight = this.Height; this.Left = (screenWidth / 2) - (windowWidth / 2); this.Top = (screenHeight / 2) - (windowHeight / 2); }); }; this.SizeChanged += delegate { ThreadPool.QueueUserWorkItem((o) => { Thread.Sleep(100); //delay (ms) Dispatcher.Invoke(DispatcherPriority.Background, (Action)delegate() { double screenWidth = SystemParameters.PrimaryScreenWidth; double screenHeight = SystemParameters.PrimaryScreenHeight; double windowWidth = this.Width; double windowHeight = this.Height; this.Left = (screenWidth / 2) - (windowWidth / 2); this.Top = (screenHeight / 2) - (windowHeight / 2); }); }); };

Like I said just a guess as I dont have a setup to replicate the data load delay

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