WPF

That Asian Guy wrote:

WPF designer didn't seem to be able to detect it

That Asian Guy wrote:

What's the proper way of declaring a new property for a control?

<TreeView Name="treeView1">
    <TreeViewItem>
        <TreeViewItem.Header>
            <StackPanel Orientation="Horizontal">
                <TextBlock>aaa</TextBlock>
                <ComboBox Height="19">
                    <ComboBoxItem Content="111" IsSelected="True"></ComboBoxItem>
                    <ComboBoxItem>222</ComboBoxItem>
                    <ComboBoxItem Content="333"></ComboBoxItem>
                </ComboBox>
            </StackPanel>
        </TreeViewItem.Header>
        <TreeViewItem Header="aaa1">
        </TreeViewItem>
        <TreeViewItem Header="aaa2">
        </TreeViewItem>
    </TreeViewItem>
    <TreeViewItem Header="bbb">
        <TreeViewItem Header="bbb1" />
        <TreeViewItem Header="bbb2" />
    </TreeViewItem>
    <TreeViewItem Header="ccc" />
</TreeView>

Ch.Gayatri Subudhi wrote:

the treeview of asp.net webapplication

Mark Salsbery
Microsoft MVP - Visual C++

<TextBox Text="{Binding ElementName=playlists, Path=SelectedValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
<ListBox Name="playlists" ItemsSource="{Binding Path=Files}" SelectionMode="Single"/>

public class Playist
{
    public ObservableCollection<string> Files { get; set; }

    public Playist()
    {            
        Files = new ObservableCollection<string>();
        Files.Add("a");
        Files.Add("b");
        Files.Add("c");
        Files.Add("d");           
    }
}</string></string>

private Playist _playlist = new Playist();

public Window1()
{
    InitializeComponent();

    playlists.DataContext = _playlist;
}

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <StackPanel>
        <TextBox Text="{Binding ElementName=playlists, Path=SelectedValue.Content, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
        <ListBox Name="playlists"  SelectionMode="Single">
            <ListBoxItem>a</ListBoxItem>
            <ListBoxItem>b</ListBoxItem>
            <ListBoxItem>c</ListBoxItem>
            <ListBoxItem>d</ListBoxItem>
        </ListBox>
        <!-- ItemsSource="{Binding Path=Files}" -->
    </StackPanel>
</Window>

using System.Windows;
using System.Collections.ObjectModel;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        private PlayList _playlist = new PlayList();
        public Window1()
        {
            InitializeComponent();
            playlists.DataContext = _playlist;
        }
    }

    public class PlayList 
    { 
        public ObservableCollection<string> Files { get; set; } 
        public PlayList() 
        {
            Files = new ObservableCollection<string>(); 
            Files.Add("a"); 
            Files.Add("b"); 
            Files.Add("c"); 
            Files.Add("d"); 
        } 
    }
}

<TextBox Text="{Binding ElementName=playlists, Path=SelectedItem.Name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
<ListBox Name="playlists" ItemsSource="{Binding Path=Files}" SelectionMode="Single">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Name}"/>
        </DataTemplate>          
    </ListBox.ItemTemplate>
</ListBox>

public class MyFile
{
    public string Name { get; set; }
}
   
public class Playist
{
    public ObservableCollection<myfile> Files { get; set; }

    public Playist()
    {
        Files = new ObservableCollection<myfile>();
        Files.Add(new MyFile { Name = "a" });
        Files.Add(new MyFile { Name = "b" });
        Files.Add(new MyFile { Name = "c" });
        Files.Add(new MyFile { Name = "d" });
    }
}

public partial class Window1 : Window
    {
        private PlayList _playlist = new PlayList();
        public Window1()
        {
            InitializeComponent();
            playlists.DataContext = _playlist;
        }
    }</myfile></myfile>

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <StackPanel>
        <TextBox Text="{Binding ElementName=playlists, Path=SelectedItem.Name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
        <ListBox Name="playlists" ItemsSource="{Binding Path=Files}" SelectionMode="Single">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Name}"/>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <Button Content="Show file list from DC" Click="Button_Click" />
    </StackPanel>
</Window>

using System.Windows;
using System.Collections.ObjectModel;
using System.Text;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        private PlayList _playlist = new PlayList();
        public Window1()
        {
            InitializeComponent();
            playlists.DataContext = _playlist;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            foreach (MyFile file in _playlist.Files)
            {
                sb.Append(file.Name + " ");
            }
            MessageBox.Show(sb.ToString());
        }
    }

    public class MyFile 
    { 
        public string Name { get; set; } 
    }

    public class PlayList 
    {
        public ObservableCollection<MyFile> Files { get; set; }

        public PlayList() 
        {
            Files = new ObservableCollection<MyFile>();
            Files.Add(new MyFile { Name = "a" });
            Files.Add(new MyFile { Name = "b" });
            Files.Add(new MyFile { Name = "c" });
            Files.Add(new MyFile { Name = "d" }); 
        } 
    }
}