WPF拖动DataGrid中的数据到ListBox

1、效果图：

 

 

2、XAML

<Window x:Class="WpfApplication2.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded">

    <Grid>

        <ListBox Height="287" HorizontalAlignment="Left" Margin="12,12,0,0" Name="m_ListBox" VerticalAlignment="Top" Width="148" SelectionMode="Single"  AllowDrop="True" Drop="m_ListBox_Drop" DragOver="m_ListBox_DragOver">

            <ListBox.ItemTemplate>

                <DataTemplate>

                    <StackPanel>

                        <TextBlock Text="{Binding Path=Id, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" />

                        <TextBlock Text="{Binding Path=Name, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" />

                        <TextBlock Text="{Binding Path=ChildCount, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" />

                        <Button Content="展示" Tag="{Binding}" Name="m_ListBoxButton" Click="m_ListBoxButton_Click" />

                    </StackPanel>

                </DataTemplate>

            </ListBox.ItemTemplate>

        </ListBox>

        <DataGrid AutoGenerateColumns="False" Height="287" HorizontalAlignment="Left" Margin="181,12,0,0" Name="m_DataGrid" VerticalAlignment="Top" Width="299" AllowDrop="True" SelectionMode="Extended"  PreviewMouseLeftButtonDown="m_DataGrid_PreviewMouseLeftButtonDown">

            <DataGrid.Columns>

                <DataGridTextColumn Binding="{Binding Id}" IsReadOnly="True" />

                <DataGridTextColumn Binding="{Binding Name}" IsReadOnly="True" />

            </DataGrid.Columns>

        </DataGrid>

    </Grid>

</Window>

 

3、CS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Collections.ObjectModel;

using System.ComponentModel;



namespace WpfApplication2

{

    /// <summary>

    /// MainWindow.xaml 的交互逻辑

    /// </summary>

    public partial class MainWindow : Window

    {

        private ObservableCollection<Person> listBoxList = new ObservableCollection<Person>();

        private Person m_SelectedListBoxPerson;

        private Button m_SelectedListBoxButton;



        public MainWindow()

        {

            InitializeComponent();

        }



        private void Window_Loaded(object sender, RoutedEventArgs e)

        {

            Person person = new Person() { Id = "01", Name = "未分配" };

            listBoxList.Add(person);

            listBoxList.Add(new Person() { Id = "a1", Name = "a11" });

            listBoxList.Add(new Person() { Id = "a2", Name = "a22" });

            //初始化数据

            person.Children.Add(new Person() { Id = "1", Name = "001" });

            person.Children.Add(new Person() { Id = "2", Name = "002" });

            person.Children.Add(new Person() { Id = "3", Name = "003" });

            person.Children.Add(new Person() { Id = "4", Name = "004" });

            person.Children.Add(new Person() { Id = "5", Name = "005" });

            person.Children.Add(new Person() { Id = "6", Name = "006" });

            person.Children.Add(new Person() { Id = "7", Name = "007" });

            person.Children.Add(new Person() { Id = "8", Name = "008" });

            person.Children.Add(new Person() { Id = "9", Name = "009" });

            person.Children.Add(new Person() { Id = "10", Name = "010" });



            //控件加载数据

            this.m_ListBox.ItemsSource = listBoxList;

        }

        private void m_DataGrid_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)

        {

            Point pos = e.GetPosition(m_DataGrid);

            HitTestResult result = VisualTreeHelper.HitTest(m_DataGrid, pos);

            DataGrid dataGrid = this.FindVisualParent<DataGrid>(result.VisualHit);

            if (dataGrid == null || dataGrid.SelectedItems.Count <= 0)

            {

                return;

            }



            List<Person> list = new List<Person>();

            for (int i = 0; i < dataGrid.SelectedItems.Count; i++)

            {

                if (dataGrid.SelectedItems[i] is Person)

                {

                    list.Add(dataGrid.SelectedItems[i] as Person);

                }

            }

            DragDrop.DoDragDrop(m_DataGrid, list, DragDropEffects.Move);

        }

        private void m_ListBox_Drop(object sender, DragEventArgs e)

        {

            Point pos = e.GetPosition(m_ListBox);

            HitTestResult result = VisualTreeHelper.HitTest(m_ListBox, pos);

            if (result == null)

            {

                return;

            }

            ListBox listBox = this.FindVisualParent<ListBox>(result.VisualHit);

            if (listBox == null || listBox.SelectedItem == null)

            {

                return;

            }



            List<Person> persons = e.Data.GetData(typeof(List<Person>)) as List<Person>;

            if (persons != null)

            {

                foreach (var item in persons)

                {

                    Person person = listBox.SelectedItem as Person;

                    person.Children.Add(item);

                    person.ChangeChildCount();



                    m_SelectedListBoxPerson.Children.Remove(item);

                    m_SelectedListBoxPerson.ChangeChildCount();

                }

            }

        }

        private void m_ListBox_DragOver(object sender, DragEventArgs e)

        {

            Point pos = e.GetPosition(m_ListBox);

            HitTestResult result = VisualTreeHelper.HitTest(m_ListBox, pos);

            if (result == null)

            {

                return;

            }

            ListBoxItem listBoxItem = this.FindVisualParent<ListBoxItem>(result.VisualHit);

            if (listBoxItem == null || listBoxItem.Content == null || !(listBoxItem.Content is Person))

            {

                return;

            }



            m_ListBox.SelectedItem = listBoxItem.Content;

            m_ListBox.Focus();

        }

        private void m_ListBoxButton_Click(object sender, RoutedEventArgs e)

        {

            if (m_SelectedListBoxButton != null)

            {

                m_SelectedListBoxButton.IsEnabled = true;

                m_SelectedListBoxButton.Content = "展示";

            }

            m_SelectedListBoxButton = sender as Button;

            m_SelectedListBoxButton.Content = "待分配数据集合";

            m_SelectedListBoxButton.IsEnabled = false;

            m_ListBox.SelectedItem = m_SelectedListBoxButton.Tag;

            m_ListBox.Focus();

            m_SelectedListBoxPerson = m_ListBox.SelectedItem as Person;

            this.m_DataGrid.ItemsSource = m_SelectedListBoxPerson.Children;

        }



        private T FindVisualParent<T>(DependencyObject obj) where T : class

        {

            while (obj != null)

            {

                if (obj is T)

                    return obj as T;

                obj = VisualTreeHelper.GetParent(obj);

            }

            return null;

        }

    }



    class Person : INotifyPropertyChanged

    {

        public string Id { get; set; }

        public string Name { get; set; }

        public int ChildCount 

        {

            get {

                return this.Children.Count;

            }

        }

        public ObservableCollection<Person> Children { get; set; }

        public void ChangeChildCount()

        {



            this.Changed("ChildCount");

        }

       

        public Person() 

        {

            this.Children = new ObservableCollection<Person>();

        }



        #region 属性更改通知

        public event PropertyChangedEventHandler PropertyChanged;

        private void Changed(string PropertyName)

        {

            if (this .PropertyChanged != null)

                this.PropertyChanged(this , new PropertyChangedEventArgs(PropertyName));

        }

        #endregion

    }

}

 

 

4、