/// <summary>
/// 在指定根类型的情况下，从当前层级开始逐层往上查找特定类型的对象
/// </summary>
public static T1 GetAncestorOrSelf <T1, T2>(DependencyObject objReference) where T1 : FrameworkElement where T2 : FrameworkElement
{
T1 objRetval = null;
do
{
if (null == objReference)
{
break;
}
if (objReference is T2)
{
break;
}
if (objReference is T1)
{
objRetval = objReference as T1;
break;
}
if (objReference is FrameworkContentElement)
{
objRetval = VisualTreeHelperEx.GetAncestorOrSelf <T1, T2>((objReference as FrameworkContentElement).Parent);
break;
}
var objParent = VisualTreeHelper.GetParent(objReference);
objRetval = VisualTreeHelperEx.GetAncestorOrSelf <T1, T2>(objParent);
}while (false);
return(objRetval);
}
