获取和设置元素的焦点
我想做的是在刷新 BO 之前获取最后一个焦点元素并将其设置回最后一个焦点值。
这个想法如下：
//get last focus element
var x = Keyboard.FocusedElement;
//refresh my businessobject here
CallMethod();
//set the focus to my last element
FocusManager.SetFocusedElement(focusScope, x);
...但这里的问题是在调用刷新对象方法之后，我的“x”值在此过程中发生了变化。
有人遇到过这个问题吗？
What I am trying to do is get the last focus element before doing a refresh on my BO and set it back to the last focus value.
the idea is something like below:
//get last focus element
var x = Keyboard.FocusedElement;
//refresh my businessobject here
CallMethod();
//set the focus to my last element
FocusManager.SetFocusedElement(focusScope, x);
... but the problem here is after calling the refresh object method my "x" value got changed in the process.
Anyone experience this problem?
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您不能只分配
Keyboard.FocusedElement因为Keyboard.FocusedElement是引用类型。因此，一旦框架更改了Keyboard.FocusedElement，您的副本就会发生变化。您将需要找到一种新方法来识别在调用之前获得焦点的控件，或者尝试找到有效的深度复制解决方案。You cannot just assign
Keyboard.FocusedElementbecauseKeyboard.FocusedElementis a reference type. So as soon as the Framework changes theKeyboard.FocusedElement, your copy changes. You will need to find a new way to identify the control that had focus before the call or try and find a deep copy solution that works.为什么不使用
Focus()方法？或考虑使用
FocusManager.GetFocusedElement(focusScope)...Why not use the
Focus()method??or consider using
FocusManager.GetFocusedElement(focusScope)...