這裏是WPF的新手。正在構建的應用程序具有從數據庫中拉出的用戶列表,以顯示在「用戶」窗口中,並可從「主」窗口導航。該列表似乎轉移到後面的代碼中,但用戶列表未顯示在「用戶」窗口列表框中。有沒有人看到爲什麼這不顯示?提前謝謝了!WPF列表框數據綁定
「主」 窗口指導:
UsersViewModel Usersvm = new UsersViewModel();
Usersvm.Users = new List<UserViewModel>();
DbEntities db = new DbEntities();
var pulledUsers = db.uspGetUsers().ToList();
foreach (var result in pulledUsers)
{
var pulledUser = new UserViewModel
{
FirstName = result.FirstName,
LastName = result.LastName,
EMail = result.Email,
UserID = result.UserID,
Position = result.Position,
EndDate = result.EndDate,
};
Usersvm.Users.Add(pulledUser);
}
new UsersWindow(Usersvm).Show();
UsersWindow後面的代碼:
public partial class UsersWindow : Window
{
public UsersWindow(UsersViewModel uvm)
{
InitializeComponent();
listboxUsers.ItemsSource = uvm.Users;
}
}
UsersWindow.xaml:
<Window x:Class="DbEntities.UsersWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:DbEntities"
mc:Ignorable="d"
Title="UsersWindow" Height="Auto" Width="900">
<Window.Resources>
<Style x:Key="borderBase" TargetType="Border">
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="BorderThickness" Value="1" />
</Style>
</Window.Resources>
<StackPanel>
<TextBlock x:Name="textBlock" Height="21" Margin="0,0,161,0" TextWrapping="Wrap"
Text="Users Page" VerticalAlignment="Top" RenderTransformOrigin="1.022,0.409" HorizontalAlignment="Right" Width="344"/>
<Grid>
<Grid Grid.IsSharedSizeScope="True">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="151*" />
<ColumnDefinition Width="95*" />
<ColumnDefinition Width="110*" />
<ColumnDefinition Width="351*" />
<ColumnDefinition Width="75*" />
<ColumnDefinition Width="110*" />
</Grid.ColumnDefinitions>
<Border Style="{StaticResource borderBase}">
<TextBlock HorizontalAlignment="Center" Text="Last Name" />
</Border>
<Border Grid.Column="1" Style="{StaticResource borderBase}">
<TextBlock HorizontalAlignment="Center" Text="First Name" />
</Border>
<Border Grid.Column="2" Style="{StaticResource borderBase}">
<TextBlock HorizontalAlignment="Center" Text="Position" />
</Border>
<Border Grid.Column="3" Style="{StaticResource borderBase}">
<TextBlock HorizontalAlignment="Center" Text="Email" />
</Border>
<Border Grid.Column="4" Style="{StaticResource borderBase}">
<TextBlock HorizontalAlignment="Center" Text="End Date" />
</Border>
<Border Grid.Column="5" Style="{StaticResource borderBase}">
<TextBlock HorizontalAlignment="Center" />
</Border>
<ListBox x:Name="listboxUsers" HorizontalAlignment="Center" Height="Auto" Margin="3,25,0,0" VerticalAlignment="Top" Width="889"
ItemsSource="{Binding Users}" Grid.ColumnSpan="6">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="LastNameColumn" />
</Grid.ColumnDefinitions>
<Border Style="{StaticResource borderBase}">
<TextBlock Text="{Binding LastName}"/>
</Border>
<Border Style="{StaticResource borderBase}">
<TextBlock Text="{Binding FirstName}"/>
</Border>
<Border Style="{StaticResource borderBase}">
<TextBlock Text="{Binding Position}"/>
</Border>
<Border Style="{StaticResource borderBase}">
<TextBlock Text="{Binding Email}"/>
</Border>
<Border Style="{StaticResource borderBase}">
<TextBlock Text="{Binding EndDate}"/>
</Border>
<Border Style="{StaticResource borderBase}">
<Button Content="Edit" x:Name="editButton" Click="editButton_Click"/>
</Border>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</Grid>
</Grid>
</StackPanel>
</Window>
最後,UsersViewModel,隨着列表用戶聯繫信息:
public partial class UsersViewModel : Window
{
public List<UserViewModel> Users { get; set; }
}
EDIT(解決): 埃德賓吉意見,回答直接解決了原來的列表框的問題,並使用該輸入與ThyArtIsCode的結合,這是所有整齊蒙蒂提出的,這個過程是更優雅。感謝所有回覆的人 - 這裏有很多很棒的學習資料。
如果你在這一行放置一個斷點Usersvm.Users.Add(pullingUser);你有沒有看到pullUser中的任何值? – Claudius
** UsersViewModel:Window **爲什麼你在UsersViewModel中繼承了Window類? –
第一:'Usersvm.Users'需要是'ObservableCollection'類型,而不是'List'。當List的內容改變時,List不會通知UI。 'ObservableCollection'將會。其次,UsersViewModel不應該是一個窗口。一個窗口與視圖模型無關。接下來,它應該實現INotifyPropertyChanged並在用戶分配新集合時觸發'PropertyChanged'接下來,不要在代碼隱藏中分配給ItemsSource。這不是約束力。用上面的東西,你的XAML中的綁定應該能正常工作。 –