Winphone開發之數據綁定(4)

這篇博客講到了很重要的Listbox數據綁定問題，簡單的來分析下：

首先是XAML：

<phone:PhoneApplicationPage
    x:Class="JsonExample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <Grid>
        <ListBox x:Name="Lst">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Grid>
                        <TextBlock Text="{Binding Path=BookName}" Margin="70 10" FontSize="18"></TextBlock>
                    </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>

</phone:PhoneApplicationPage>

ListBox中通過DataTemplate設置了項，然後Binding Path指定了綁定的屬性，在查找綁定對象的時候，系統會沿着UI樹從下往上查找名爲BookName的屬性，具體就不在這裏多說了。

下面是CS代碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using JsonExample.Resources;
using System.Collections.ObjectModel;
using System.IO;

namespace JsonExample
{
    public partial class MainPage : PhoneApplicationPage
    {
        private ObservableCollection<BookInfo> books ;
        // 構造函數
        public MainPage()
        {
            InitializeComponent();

            books = new ObservableCollection<BookInfo>();
            Lst.ItemsSource = books;
            books.Add(new BookInfo("sss", "ee"));
            books.Add(new BookInfo("sss", "宿舍"));
 
        }
    }
}

這是結果圖，ADD的兩項都顯示了。

最後貼上簡單的類的代碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JsonExample
{
    /// <summary>
    /// 存儲每一項的消息
    /// </summary>
    public class BookInfo
    {
        public String BookId { get; set; }
        public String BookName { get; set; }

        public BookInfo(String i, String n)
        {
            BookId = i;
            BookName = n;
        }
    }
}