英文:
How to get the itemcontainer in Itemscontrol?
问题
以下是翻译好的内容：
界面:
代码:
我想获取ListView控件的itemcontainer，但始终得到null。
如果我从SelectionChanged事件中获取该项，代码将正常工作。
我不明白为什么会发生这种情况。
英文:
The UI:
The Code:
I want to get ListView control 's itemcontainer , but always get null.
If I get the item from the event SelectionChanged,the code will work correctly.
I can't understand why this happens.
答案1
得分: 0
如果你想使用ItemsControl.ContainerFromItem(Object) 方法，参数需要是你设置的数据，而不是来自 ListView.Items 的项对象。
应该像这样：
public List<Model> list { get;set; }
public MainPage()
{
this.InitializeComponent();
list = new List<Model>();
list.Add(new Model { Name = "A" });
list.Add(new Model { Name = "B" });
list.Add(new Model { Name = "C" });
list.Add(new Model { Name = "D" });
mylist.ItemsSource = list;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
ListViewItem item = mylist.ContainerFromItem(list[1]) as ListViewItem;
}
英文:
If you want to use ItemsControl.ContainerFromItem(Object) Method, the parameter needs to be the data that you set. Not an item object from the ListView.Items.
It should be something like this:
public List<Model> list { get;set; }
public MainPage()
{
this.InitializeComponent();
list = new List<Model>();
list.Add(new Model { Name = "A" });
list.Add(new Model { Name = "B" });
list.Add(new Model { Name = "C" });
list.Add(new Model { Name = "D" });
mylist.ItemsSource = list;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
ListViewItem item = mylist.ContainerFromItem(list[1]) as ListViewItem;
}
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