嗨,大家好我正试图绑定一些数据。 我有一个人的名单。点击每个这些我把用户的详细信息页面。绑定不工作windows phone 7
每个项目的水龙头,我从网络获取数据和解析它。
public ObservableCollection<ItemViewModel> PeopleDetails { get; set; }
上述行我在MainViewModel宣布
ItemViewModel.cs
在每个项目上的自来水public class ItemViewModel : INotifyPropertyChanged
{
private string _person_name;
public string _Person_name
{
get { return _person_name; }
set
{
if (value != _person_name)
{
_person_name= value;
NotifyPropertyChanged("_Person_name");
}
}
}
private string _person_info;
public string _Person_info
{
get { return _person_info; }
set
{
if (value != _person_info)
{
_person_info= value;
NotifyPropertyChanged("_Person_info");
}
}
}
private string _person_image_link;
public string _Person_image_link
{
get { return _person_image_link; }
set
{
if (value != _person_image_link)
{
_person_image_link= value;
NotifyPropertyChanged("_Person_image_link");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (null != handler)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
是执行以下代码
private void getPeopleDetails(object sender, SelectionChangedEventArgs e)
{
// Navigate to the new page
if (e.AddedItems != null && e.AddedItems.Count == 1)
{
People selectedItem = (People)e.AddedItems[0];
NavigationService.Navigate(new Uri("/PeopleDetailsView.xaml?id="+selectedItem.id, UriKind.Relative));
}
}
然后PeopleDetailsView .xaml.cs我的代码如下
public PeopleDetailsView()
{
DataContext = App.Model;
InitializeComponent();
Loaded+=new RoutedEventHandler(PeopleDetailsView_Loaded);
}
private void PeopleDetailsView_Loaded(Object sender ,RoutedEventArgs e){
string id = "";
if (NavigationContext.QueryString.TryGetValue("id",out id))
{
string url = "*****&id=" + id;";
WebClient client = new WebClient();
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompletedC);
client.DownloadStringAsync(new Uri(url));
}
}
private void client_DownloadStringCompletedC(object sender, DownloadStringCompletedEventArgs e)
{
try
{
JToken a = JObject.Parse(e.Result);
App.Model.PeopleDetails.Add(
new ItemViewModel()
{
_Person_info = a.SelectToken("info").ToString(),
_Person_image_link = a.SelectToken("image_link").ToString(),
_Person_name = a.SelectToken("name").ToString(),
}
);
}
catch (Exception execp)
{
MessageBox.Show(execp.Message.ToString());
}
}
,最后我在我的PeopleDetailsView.xaml结合数据如下
<Grid x:Name="ContentPanel" DataContext="{Binding PeopleDetails}" Grid.Row="1" Margin="12,0,12,0">
<Grid.RowDefinitions>
<RowDefinition Height="269*" />
<RowDefinition Height="338*" />
</Grid.RowDefinitions>
<Image Height="250" HorizontalAlignment="Left" Margin="12,6,0,0" Name="image1" Stretch="Fill" Source="{Binding _Person_image_link}" VerticalAlignment="Top" Width="246" />
<ScrollViewer Grid.Row="1" Height="274" HorizontalAlignment="Left" Margin="12,42,0,0" Name="scrollViewer1" VerticalAlignment="Top" Width="420">
<TextBlock Height="264" Name="textBlock1" Text="{Binding _Person_info}" />
</ScrollViewer>
</Grid>
</Grid>
但在PeopleDetailsView我看不到显示任何数据。请帮我
你能告诉我们一些更多的信息?我们需要看到你的ViewModel(ItemViewModel),你是否确定远程方法实际返回数据,并且你正确解析它? – Kenneth 2013-04-26 18:14:20
是的,我也正确地获取数据并解析它。确定il添加ItemViewModel – nyfer 2013-04-26 18:16:52