如何取得ListView 中，某一条的template 信息

Question

是这样的过程：

1. 定义了一个 Listview 的每个Item的MessageListImageTemplate，格式包括：Rectangle、TextBlock、Image

2.设置 ListView 的 template 为MessageListImageTemplate：

 

ItemTemplate

="{StaticResourceMessageListImageTemplate}"

3. 我希望在ListView 的

ItemListView_SelectionChanged 函数中，得到选中行的template。然后template->Rectangle->Visibility = Collapsed!

这个过程该如何实现呢？？

Answer 1

Template中的element或是control是不能通过name attribute去引用的，一般都是尽量在template里面用trigger去定义这些操作。

你可以试试用VisualTreeHelper.GetChild去递归查找rectangle(现在没有WIN8环境可以试，我也不确定好用不)

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Hard work, hard play!

Answer 2

对template 里边的 trigger & VisualTreeHelper.GetChild 不大明白！

有没有Win8 的例子？

谢谢啊！

Answer 3

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            ListBoxItem ListBoxItemObj = (ListBoxItem)listBox1.ItemContainerGenerator.ContainerFromItem(listBox1.Items[1]);
            TextBlock textblock = (TextBlock)FindVisualChildByName(ListBoxItemObj, "textBlock");
            textblock.Foreground = new SolidColorBrush(Colors.Red);
        }

        public FrameworkElement FindVisualChildByName(DependencyObject obj, string name)
        {
            FrameworkElement ret = null;
            int numChildren = VisualTreeHelper.GetChildrenCount(obj);
            for (int i = 0; i < numChildren; i++)
            {
                var objChild = VisualTreeHelper.GetChild(obj, i);
                var child = objChild as FrameworkElement;
                if (child != null && child.Name == name)
                {
                    return child;
                }

                ret = FindVisualChildByName(objChild, name);
                if (ret != null)
                    break;
            }
            return ret;
        }

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Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Microsoft
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