判断gridview 滑动到最右端

首先获得girdview 里面的scrollviewer，

private ChildType FindVisualChild<ChildType>(DependencyObject obj) where ChildType : DependencyObject
{
//if (obj != null)
//{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(obj, i);
if (child != null && child is ChildType)
return child as ChildType;
else
{
ChildType childOfChild = FindVisualChild<ChildType>(child);
if (childOfChild != null)
return childOfChild;
}
}
//}
return null;
}

然后注册scrollviewer 的ViewChanged 事件

然后比较 if (pScrollViewer.ScrollableWidth - pScrollViewer.HorizontalOffset < 50)，

void obj2_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
ScrollViewer pScrollViewer = (ScrollViewer)sender;
if (pScrollViewer.ScrollableWidth - pScrollViewer.HorizontalOffset < 50)
{
for (int i = 0; i < 20; i++)
{
_hotZoneList.Add(new AdProduct() { productName = "nokia", productDesc = "摩托双核双模双待明星机型…", partNum = i.ToString(), productCode = "68999999999999966" + i.ToString(), productImage = "http://cosmeticsfile.ifeng.com/datas/uploadimage/try/201209/20120903094035563.jpg", productPrice = "$65" + i.ToString() });
}
}

else

{
return;
}
}

在VariableSizedWrapGrid_Loaded_1事件获得可视子元素