我正在开发一个需要更新操作的Windows Phone 7应用程序。我有以下表类。
[Table]
public class StudentTable
{
[Column(IsPrimaryKey = true, IsDbGenerated = true, DbType = "INT NOT NULL Identity", CanBeNull = false, AutoSync = AutoSync.OnInsert)]
public int StudentID
{
get;
set;
}
[Column (CanBeNull = false)]
public string StudentName
{
get;
set;
}
[Column(CanBeNull = false)]
public string StudentClass
{
get;
set;
}
[Column(CanBeNull = false)]
public DateTime regDate
{
get;
set;
}
}
我使用以下方法为每个学生获取价值..
using (StudentDataContext context = new StudentDataContext(strConnectionString))
{
StudentTable newStudent = new StudentTable
{
StudentName = textBox1.Text.ToString(),
StudentClass = textBox2.Text.ToString(),
regDate = ((DateTime) datePicker.Value).Date.Add(((DateTime)timePicker.Value).TimeOfDay)
};
context.StudentInfo.InsertOnSubmit(newStudent);
context.SubmitChanges();
}
并在列表框中显示学生....
<ListBox HorizontalAlignment="Left" Name="StudentlistBox1" ItemsSource="{Binding}" Loaded="StudentlistBox1_Loaded">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding StudentName}" FontSize="{StaticResource PhoneFontSizeLarge}"></TextBlock>
<TextBlock Text="{Binding StudentClass}" FontSize="{StaticResource PhoneFontSizeLarge}"></TextBlock>
<TextBlock Text="{Binding regDate}" FontSize="{StaticResource PhoneFontSizeSmall}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
我尝试编码,以便列表框中的每个选定项目都会指向我可以更新所选记录的页面。 如果我得到所选项目的主键,我相信我可以这样做...如何选择列表框中的学生并传递该学生ID?任何想法.....我刚接触到Windows Phone 7 ..请帮助..
答案 0 :(得分:0)
方法1: - 通过导航传递详细信息
String uri = "/Page2.xaml?param1="+value;
NavigationService.Navigate(new Uri(uri, UriKind.Relative));
在导航到方法的第2页中访问: -
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
像这样: - QueryString this.NavigationContext.QueryString["param"];
方法2: - 将ID存储在IsolatedStorage设置中
private IsolatedStorageSettings appSettings = IsolatedStorageSettings.ApplicationSettings;
appSettings["paramFromPage1"]=paramValue;
使用appSettings [“paramFromPage1”]通过在第2页中正确解析它来检索它
* 方法3: - [可能在Application LifeTimeObjects !!中]