data-binding

问题 I have a WPF project with a view model and some nested UI elements. Here is the (relevant section of) XAML: <UserControl> // DataContext is MyVM (set programmatically) <TreeView ItemsSource="{Binding Trees}"> <TreeView.ItemTemplate> <HierarchicalDataTemplate ItemsSource="{Binding Subtrees}"> <StackPanel> <ListView ItemsSource="{Binding Contents}" SelectedValue="{Binding SelectedContent}" // won't work: Tree has no such property SelectionMode="Single"/> </StackPanel> </HierarchicalDataTemplate

问题 Previous Sources I Visited (and did not find an answer): Highlight Row In WPF Selected Item Color Highlighting Items In WPF ListView Triggers For Styling Styles For Styling And more closely-related yet too complicated/not exactly what I need sources. General Information: As tagged, this code is in c# , using WPF , with target framework .NET Framework 4.5 . Note: This is my first try at implementing MVVM , so comments about best-practices i'm missing will be appreciated (although this is not

问题 I have a CheckedListBox, binded to a BindingList: private BindingList<string> list = new BindingList<string>(); public MyForm() { InitializeComponent(); list.Add("A"); list.Add("B"); list.Add("C"); list.Add("D"); checkedListBox.DataSource = collection; } When a certain button is clicked the list is updated: private void Button_Click(object sender, EventArgs e) { list.Insert(0, "Hello!"); } And it works fine, the CheckedListBox is updated. However, when some of the items are checked, clicking

问题 I have a CheckedListBox, binded to a BindingList: private BindingList<string> list = new BindingList<string>(); public MyForm() { InitializeComponent(); list.Add("A"); list.Add("B"); list.Add("C"); list.Add("D"); checkedListBox.DataSource = collection; } When a certain button is clicked the list is updated: private void Button_Click(object sender, EventArgs e) { list.Insert(0, "Hello!"); } And it works fine, the CheckedListBox is updated. However, when some of the items are checked, clicking

问题 I can't get databinding to work within a DataTemplate in Xamarin forms. I can get it to work with the ListView (i.e. binding the RowHeight ), but once in the DataTemplate , setting things to a property of my ViewModel has no affect. In the below example, if I set the ColumnDefinition.Width to a property, it is completely ignored, but setting it to a hard value works fine. I have put in a label to see what the property value is and it turns out blank when inside the Datatemplate , and I have

问题 I have a class activity_player layout in which I have exoplayer2.ui.PlayerView and I created exo_player_control_view so that it overrides default controls in ExoPlayer. So I wanted to use Databinding in newly created custom control view but don't know how to do it. Any advice? It is actually an open issue over here, but yet to be solved. So is there anyone who had a workaround to make exo_player_control_view Databinding friendly? 回答1: You can use binding variable inside fragment/activity to

问题 I have a class activity_player layout in which I have exoplayer2.ui.PlayerView and I created exo_player_control_view so that it overrides default controls in ExoPlayer. So I wanted to use Databinding in newly created custom control view but don't know how to do it. Any advice? It is actually an open issue over here, but yet to be solved. So is there anyone who had a workaround to make exo_player_control_view Databinding friendly? 回答1: You can use binding variable inside fragment/activity to

问题 I have a class activity_player layout in which I have exoplayer2.ui.PlayerView and I created exo_player_control_view so that it overrides default controls in ExoPlayer. So I wanted to use Databinding in newly created custom control view but don't know how to do it. Any advice? It is actually an open issue over here, but yet to be solved. So is there anyone who had a workaround to make exo_player_control_view Databinding friendly? 回答1: You can use binding variable inside fragment/activity to

问题 I have a class activity_player layout in which I have exoplayer2.ui.PlayerView and I created exo_player_control_view so that it overrides default controls in ExoPlayer. So I wanted to use Databinding in newly created custom control view but don't know how to do it. Any advice? It is actually an open issue over here, but yet to be solved. So is there anyone who had a workaround to make exo_player_control_view Databinding friendly? 回答1: You can use binding variable inside fragment/activity to

问题 I am using Winforms DevExpress and I am binding a DataTable to a DataGridView which is working fine. The problem I am having is that I have some functions that will build a new DataTable object which is separate from the original which needs to replace the original DataTable that is bound to the DataGridView. DataTable originalTable = new DataTable("OriginalTable"); //Populate originalTable myDataGridControl.DataSource = originalTable; Everything works fine with the code above, but the