小编use*_*080的帖子

我们使用WPF Tookit DataGrid和.NET 3.5大约2年.我们有两个抛出异常的情况 - "对Automation Peer API的递归调用无效".它退出了奇怪和古怪,很少有PC有这样的问题.

案例一:

下拉式combox(WPF Tookit DataGrid作为DropDown内容控件):

它可以通过以下方式解决:

protected override AutomationPeer OnCreateAutomationPeer()
{
   return null;
}

此解决方案来自WPF Recursive调用Automation Peer API无效.

案例二:

WPF Tookit DataGrid有一个Temlate列,单元格模板有一个下拉式combox(WPF Tookit DataGrid作为DropDown内容控件).它不能通过上述解决方案来解决.

*Exception Stack:
Exception object: 0ac4e048
Exception type:   System.InvalidOperationException
Message:          Recursive call to Automation Peer API is not valid.
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    0036E3A4 61A0CEFE PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.GetChildren()+0x366bde
    0036E3D4 616A5C34 PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer)+0x18
    0036E3EC 616A5C73 PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer)+0x57
    0036E404 616A5C73 PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer)+0x57
    0036E41C 616A5C73 PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer)+0x57
    0036E434 616A5C73 PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer)+0x57
    0036E44C 616A5C73 PresentationCore_ni!System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer)+0x57 …