Silverlight学习笔记九ListBox控件

Silverlight ListBox控件示例

最新推荐文章于 2012-12-27 15:59:38 发布

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最新推荐文章于 2012-12-27 15:59:38 发布

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原文链接：http://www.cnblogs.com/salam/archive/2010/07/13/1776662.html

本文介绍了一个使用Silverlight ListBox控件的示例程序，展示了如何实现列表项的拖拽功能及根据不同的属性显示列表项内容。

ListBox是SilverLight列表控件

1.ListBoxDemo.xaml

    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="120" />
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="Auto" />
        </Grid.ColumnDefinitions>
        <StackPanel Grid.Column="0" FlowDirection="LeftToRight">
            <CheckBox Content="是否允许拖动" x:Name="IsdragDrop" IsChecked="True" Click="CheckBox_Click"></CheckBox>
            <TextBox x:Name="txtSelectValue" Text="SelectValue" Margin="3"></TextBox>
            <TextBox x:Name="txtSelectItem" Text="SelectItem" Margin="3"></TextBox>
            <TextBlock Text="显示项："></TextBlock>
                <ComboBox HorizontalAlignment="Left" Width="auto" SelectedItem="{Binding DisplayMemberPath, ElementName=listBox, Mode=TwoWay}" Margin="4" SelectedIndex="2">
                <sys:String>Name</sys:String>
                <sys:String>IsEnabled</sys:String>
                <sys:String>UserID</sys:String>
            </ComboBox>

        </StackPanel>
        <toolKit:ListBoxDragDropTarget x:Name="dragDrop1" AllowDrop="True" Grid.Column="1">
            <ListBox Height="200" Width="200" x:Name="listBox" ItemsSource="{Binding}" DisplayMemberPath="Name">

            </ListBox>
        </toolKit:ListBoxDragDropTarget>
        <toolKit:ListBoxDragDropTarget x:Name="dragDrop2" AllowDrop="True" Grid.Column="2">
            <ListBox Height="200" Width="200" DisplayMemberPath="Name">

            </ListBox>
        </toolKit:ListBoxDragDropTarget>
    </Grid>
</UserControl>

2.ListBoxDemo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Silverlight.Common.Core;

namespace Silverlight.Common.View
{
    public partial class ListBoxDemo : UserControl
    {
        public ListBoxDemo()
        {
            InitializeComponent();
            this.DataContext = UserList.GetUserList();
        }

        private void CheckBox_Click(object sender, RoutedEventArgs e)
        {
            if (!(bool)this.IsdragDrop.IsChecked)
            {
                this.dragDrop1.AllowDrop = false;
                this.dragDrop2.AllowDrop = false;

            }

            else
            {
                this.dragDrop1.AllowDrop = true;
                this.dragDrop2.AllowDrop = true;
            }

}

        private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (this.listBox.SelectedValue!=null)
            {
             User user=this.listBox.SelectedValue as User;
             this.txtSelectValue.Text = user.Name;
            }

            if (this.listBox.SelectedItem != null)
            {
                User user = this.listBox.SelectedItem as User;
                this.txtSelectItem.Text = user.Name;
            }
        }
    }
}

注：DisplayMemberPath是ListBox的显示项，通过改变这个属性，来改变所显示对象的属性。

转载于:https://www.cnblogs.com/salam/archive/2010/07/13/1776662.html