按下 Tab 时，Foxpro 托管的 Wpf 窗口将焦点返回到 Foxpro
我有一个 Visual FoxPro 9 应用程序，我使用 COM 互操作从中调用 wpf 窗口。第一次按下 TAB 时，焦点返回到 FoxPro 窗口。如果我回到 wpf 窗口，这种情况会再次发生，直到我第三次这样做，然后焦点才能正常工作。使用鼠标或 Alt+Tab 返回 wpf 窗口会发生这种情况。无论是否有焦点元素（文本框、日期选择器等），都会发生这种情况。 我曾尝试捕获窗口的PreviewKeyDown事件，但似乎在捕获它之前就发生了。我已经在 wpf 应用程序中测试了 wpf 窗口，它工作正常。
C Sharp 类就像：
[ClassInterface(ClassInterfaceType.AutoDispatch)]
[ProgId("SBN.WPF.Com")]
[ComVisible(true)]
public class WpfFoxPro
{
而 FoxPro 调用就像：
oDll = Createobjectex("SBN.WPF.Com", "", "")
oDll.VOpenWPFWindow()
我正在使用 Visual Studio 2010 和 .Net 4.0，但我已经没有想法了。有人知道这件事吗？
I have a Visual FoxPro 9 application from which I call a wpf window using COM interop. When TAB is pressed for the first time the focus goes back to the FoxPro window. If I come back to the wpf window this happens again until the third time I do it, and then the focus works normally. This occurs using the mouse or Alt+Tab to go back to the wpf window. It happens whether there is a focused element (textbox, datepicker,...) or not.
I have tried to capture the PreviewKeyDown event of the window, but it seems that it happens before it can capture it. I have tested the wpf window in a wpf application and it works ok.
The C Sharp class is like:
[ClassInterface(ClassInterfaceType.AutoDispatch)]
[ProgId("SBN.WPF.Com")]
[ComVisible(true)]
public class WpfFoxPro
{
and the FoxPro calls are like:
oDll = Createobjectex("SBN.WPF.Com", "", "")
oDll.VOpenWPFWindow()
I'm using Visual Studio 2010 and .Net 4.0 and I'm running out of ideas. Does any one know something about this?
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听起来可能很愚蠢，但是您可以在 WPF 窗口处于活动状态时禁用 VFP 窗口吗？这不是一个解决方案，但基于 10 年的 VFP 工作经验，有时您只需停止用头撞砖墙，而去拼凑。 ;)
Might sound stupid, but could you disable the VFP windows whilst the WPF one is active? It's not a solution, but based on 10 years of working with VFP, sometimes you just have to stop bashing your head against the brick wall and go for the kludge. ;)