RT

雖然DataTemplate 是用來繫結的,一般用ONE TWOWAY 來繫結傳遞或獲取資料.

但是今天這個需求真是沒辦法,在繫結的模板內添加了一個非繫結的資料,需要手動取值.

解決方案原理:

https://msdn.microsoft.com/zh-cn/library/bb613579.aspx

            foreach (var item in FListView.Items)
            {

                var myListBoxItem = (ListViewItem)FListView.ItemContainerGenerator.ContainerFromItem(item);

                // Getting the ContentPresenter of myListBoxItem
                var myContentPresenter = FindVisualChild<ContentPresenter>(myListBoxItem);

                // Finding textBlock from the DataTemplate that is set on that ContentPresenter
                DataTemplate myDataTemplate = myContentPresenter.ContentTemplate;

                var obj = myDataTemplate.FindName("CheckNum", myContentPresenter);//CheckNum 是在模板內定義的 x:Name

                var checkNum = obj as NumericControl;//自定義控制元件

                if (checkNum != null)
                {//...do something
                }
            }
 

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