我正在尝试使用数据库(sqlite)技术创建Windows Phone 8项目
我尝试了以下方法:
1)从服务器下载sqlite fie并将其保存在本地应用程序中
2)我也可以使用“本链接”中的一些示例代码以及其他一些链接,从本地sqlite数据库中检索值并显示在消息框中。
但是,我无法在列表框中绑定该值。
这是我的代码:
XAML代码:
<Grid x:Name="ContentPanel" Grid.RowSpan="2">
<ListBox Name="scheduleListbox" Margin="5,85,5,60" ItemsSource="{Binding}" SelectionChanged="scheduleListbox_SelectionChanged">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Height="250" Width="480">
<Grid.RowDefinitions>
<RowDefinition Height="20"></RowDefinition>
<RowDefinition Height="40"></RowDefinition>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="40"></RowDefinition>
</Grid.RowDefinitions>
<TextBlock Name="team1Name" Text="{Binding team1_name}" Grid.Row="0"></TextBlock>
<TextBlock Name="team2Name" Text="{Binding team2_name}"></TextBlock>
<TextBlock Name="venue" Text="{Binding venue}" ></TextBlock>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<toolkit:ListPicker Name="selectTeam" Height="60" ItemsSource="{Binding}" VerticalAlignment="Bottom" Background="Black" FullModeHeader="Select your Team Schedule" Foreground="White" ExpansionMode="FullScreenOnly" Margin="5,0" SelectionChanged="selectTeam_SelectionChanged">
<toolkit:ListPicker.ItemTemplate>
<DataTemplate>
<StackPanel Name="listpickerStackpannel" >
<TextBlock Text="{Binding}" TextAlignment="Center" FontFamily="Times New Roman" FontSize="30"></TextBlock>
</StackPanel>
</DataTemplate>
</toolkit:ListPicker.ItemTemplate>
<toolkit:ListPicker.FullModeItemTemplate>
<DataTemplate>
<StackPanel Name="listpickerStackpannel" Margin="10">
<TextBlock Text="{Binding}" TextAlignment="Center" FontFamily="Times New Roman" FontSize="30"></TextBlock>
</StackPanel>
</DataTemplate>
</toolkit:ListPicker.FullModeItemTemplate>
</toolkit:ListPicker>
</Grid>
而我的CS代码是:
string DB_PATH = Path.Combine(ApplicationData.Current.LocalFolder.Path, "sample.sqlite");
//SQLite connection
private SQLiteConnection dbConn;
private List<string> _source = new List<string>
{
"Full Schedule","Afghanistan","Australia","Bangladesh","England","Hong Kong","India","Ireland","Nepal","Netherlands","New Zealand","Pakistan","South Africa","Sri Lanka","UAE","West Indies","Zimbabwe"
};
public MainPage1()
{
InitializeComponent();
selectTeam.ItemsSource = _source;
}
private void scheduleListbox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
dbConn = new SQLiteConnection(DB_PATH);
/// Create the table Task, if it doesn't exist.
dbConn.CreateTable<iccworldt20_schedule>();
/// Retrieve the task list from the database.
List<iccworldt20_schedule> retrievedTasks = dbConn.Query<iccworldt20_schedule>("select * from iccworldt20_schedule").ToList<iccworldt20_schedule>();
/// Clear the list box that will show all the tasks.
scheduleListbox.Items.Clear();
foreach (var t in retrievedTasks)
{
MessageBox.Show(t.ToString());
}
}
}
public class iccworldt20_schedule
{
[PrimaryKey, AutoIncrement]
public int match_id { get; set; }
public string team1_Name { get; set; }
public string team2_Name { get; set; }
public string match_no { get; set; }
public string group { get; set; }
public string venue { get; set; }
public string time { get; set; }
public string day { get; set; }
public override string ToString()
{
return team1_Name + ":" + team2_Name +venue;
}
}
请提供一些解决方案,说明如何从sqlite DB中检索值并将其值绑定到列表框。
我看不到任何将数据添加到ListBox的代码。如果您有从数据库中提取的数据,则将其添加到所有的ItemsSource属性中。
scheduleListbox.ItemsSource = retrievedTasks;
我不明白为什么在将其填充到构造函数中时在selectTeam ListPicker上使用ItemsSource =“ {Binding}”的原因。以及为什么要对scheduleListbox使用相同的内容。请参阅绑定概述
如果您使用的是空绑定语法,则为{Binding}。ListBox从父元素继承DataContext。如果未指定路径,则默认为绑定到整个对象。
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