Question

我需要向ListView项添加两个ComboBox控件，但它显示的是listview项而不是listview名。

listView = new ListView();
ObservableCollection<String> list = new ObservableCollection<string>();
list.Add("1");
list.Add("2");      
listView.ItemsSource = list;

listView2 = new ListView();
ObservableCollection<String> list12 = new ObservableCollection<string>();
list12.Add("11");
list12.Add("12");
listView2.ItemsSource = list12;

combobox.Items.Add(listView);
combobox.Items.Add(listView12);

private void combobox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
   var combobox = sender as ComboBox;
   if(combobox.SelectedIndex == 0)
      combobox.ItemsSource = listView;
   else
      combobox.ItemsSource = listView12;
}

这是我的Xaml代码

<ComboBox Grid.Row="4" x:Name="combobox" SelectionChanged="combobox_SelectionChanged" />

Answer 1

您的错误如下：

if(combobox.SelectedIndex == 0)
  combobox.ItemsSource = listView;
else
  combobox.ItemsSource = listView12;

您要将列表内容设置为组合框的ItemsSource。这意味着组合框中的选项将是listView或listView12中的项目。

您应该没有任何事情要做，因为您已经在启动期间使用以下行填充了组合框：

combobox.Items.Add(listView);
combobox.Items.Add(listView12);

当组合框选择发生变化时，您可能只想检索所选项目并使用它更新应用程序的其他部分。

Answer 2

listView = new ListView();
ObservableCollection<String> list = new ObservableCollection<string>();
list.Add("1");
list.Add("2");      
listView.ItemsSource = list;

listView2 = new ListView();
ObservableCollection<String> list12 = new ObservableCollection<string>();
list12.Add("11");
list12.Add("12");
listView2.ItemsSource = list12;

Dictionary<string,ObservableCollection<String>> dictionary = new Dictionary<string,ObservableCollection<String>();
dictionary.Add(nameof(list), list);
dictionary.Add(nameof(list12),list12);

combobox.ItemsSource = dictionary;
//And make sure you add DisplayMemberPath="Key" in the combobox.

private void combobox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
   var combobox = sender as ComboBox;
   if(combobox.SelectedIndex == 0)
      combobox.ItemsSource = dictionary[nameof(list)];
   else
      combobox.ItemsSource = dictionary[nameof(list12)];

   //Clear the DisplayMemberPath since you're binding the values now.
   combobox.DisplayMemberPath  = null;
}

我想这就是你想要实现的目标，尽管它没有多大意义。

如何将ListView控件绑定到ComboBox ItemSource

2 个答案: