如何将数据绑定到视图模型中定义的属性的子属性
本文关键字:属性 定义 模型 视图 数据绑定 | 更新日期: 2023-09-27 18:35:24
>我有以下 xaml 不起作用:
...
<phone:PhoneApplicationPage.Resources>
<DataTemplate x:Key="OrganisationTemplate">
<Grid Margin="40,0,0,0">
<StackPanel>
<TextBlock Text="{Binding name}"></TextBlock>
</StackPanel>
</Grid>
</DataTemplate>
<DataTemplate x:Key="UserStatusTemplate">
<Grid Margin="40,0,0,0">
<StackPanel>
<TextBlock Text="{Binding Path=profile.name}"></TextBlock>
</StackPanel>
</Grid>
</DataTemplate>
</phone:PhoneApplicationPage.Resources>
...
<!--Panorama item one-->
<phone:PanoramaItem Header="Home">
<ListBox Name="UserStatus" ItemTemplate="{StaticResource UserStatusTemplate}" ItemsSource="{Binding UserStatus}" Margin="0,0,0,96" IsSynchronizedWithCurrentItem="False"/>
</phone:PanoramaItem>
我有以下视图模型:
public class Sections
{
public IEnumerable<Organisation> Organisations { get; set; }
public User User { get; set; }
public UserStatus UserStatus { get; set; }
}
class DashboardViewModel : INotifyPropertyChanged
{
public Sections sections = new Sections();
private OrganisationRepository organisationRepository { get; set; }
private UserRepository userRepository { get; set; }
public DashboardViewModel()
{
LoadOrganisationSection();
LoadHomeSection();
}
...
private async void LoadHomeSection()
{
userRepository = new UserRepository();
sections.UserStatus = await userRepository.GetStatus();
UserStatus = null;
}
#region properties
public UserStatus UserStatus
{
get
{
return sections.UserStatus;
}
set
{
if (sections.UserStatus != value)
{
//LoginCredentials.Username = value;
OnPropertyChanged();
}
}
}
...
#endregion
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChangedEventHandler tempEvent = PropertyChanged;
if (tempEvent != null)
{
// property changed
tempEvent(this, new PropertyChangedEventArgs(propertyName));
}
}
}
在加载主页部分中,该部分。UserStatus 有一个属性填满了(我已经调试过,所以它肯定在那里),路由:section.UserStatus.profile.name 显然这反映在向视图模型公开的属性中:UserStatus.profile.name
如何访问 xaml 中的子属性?
如果要访问的属性直接在那里,我还有其他属性可以工作(请参阅组织模板)
我看过其他帖子,但我无法让他们的版本工作。
啊,这是因为你不能在列表框中使用单个项目......呵呵:
<phone:PanoramaItem Header="Home">
<TextBlock Name="UserStatus" Text="{Binding UserStatus.profile.name}" />
<!--<ListBox Name="UserStatus" ItemTemplate="{StaticResource UserStatusTemplate}" ItemsSource="{Binding UserStatus}" Margin="0,0,0,96" IsSynchronizedWithCurrentItem="False"/>-->
</phone:PanoramaItem>