[英]c# DataBinding in User control Win8
我有一個ObservableCollection的列表,該列表從數據庫接收數據,並通過數據綁定將這些數據放入網格中。 因此,我有一個用戶控件,當我單擊此網格的某個項目時出現。 我希望用戶控件的文本框顯示網格中的所選項目。 我已經使用數據綁定嘗試了此操作,但是文本框未顯示所選項目。
網格代碼:
<FlexGrid:C1FlexGrid
x:Name="grid" ItemsSource="{Binding list3, Mode=TwoWay}"
AutoGenerateColumns="False"
HorizontalAlignment="Left" Height="431" Margin="10,147,0,0" VerticalAlignment="Top" Width="1152" SelectionMode="Row" KeepCurrentVisible="True" Tapped="grid_Tapped" >
<FlexGrid:C1FlexGrid.DataContext>
<local:Controller/>
</FlexGrid:C1FlexGrid.DataContext>
<FlexGrid:C1FlexGrid.Columns>
<FlexGrid:Column Binding="{Binding describe}" Header="Describes" Width="800" />
<FlexGrid:Column Binding="{Binding describeNote}" Header="Describes Notes" Width="300" />
</FlexGrid:C1FlexGrid.Columns>
</FlexGrid:C1FlexGrid>
用戶控制代碼:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Binding"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:FlexGrid="using:C1.Xaml.FlexGrid"
x:Class="Binding.popNotas"
mc:Ignorable="d" Height="281.925" Width="656.03">
<Grid>
<TextBox x:Name="txt2" Text="{Binding SelectedItem.describe, ElementName=grid, Mode=TwoWay}" Height="38" Margin="140,5,141,0" TextWrapping="Wrap" VerticalAlignment="Top">
</TextBox>
</Grid>
CS代碼
public class Controller : Common.BindableBase
{
//DAOS
public TesteDao dao { get; set; }
private ObservableCollection<ClPasso> _list3 = new ObservableCollection<ClPasso>();
public ObservableCollection<ClPasso> list3
{
get { return _list3; }
set { this.SetProperty(ref this._list3, value); }
}
public Controller()
{
OnNavigatedTo();
}
protected async void OnNavigatedTo()
{
await InitializeDatabase();
list3 = await createlist3();
}
private async Task InitializeDatabase()
{
string datbasePath = Windows.Storage.ApplicationData.Current.LocalFolder.Path + "\\bd_example.db";
DataBase database = new DataBase (datbasePath);
await database.initialize();
dao = new TesteDao(database);
}
public async Task<ObservableCollection<ClPasso>> createlist3()
{
return await dao.joinListAsync(123, "924be4cc-16db-40c2-b342-d6c1fccbec86");
}
}
救命!
謝謝!!!
我已經解決了我的問題。
因此,我在用戶控件后面的代碼上創建了DependencyProperty,命名為selection,然后將其放在文本框的文本中。.當我將使用用戶控件時,在我的主頁中,將值傳遞給了porperty ..
像這樣:
用戶控制
public sealed partial class UCNotes : UserControl
{
public string selection
{
get { return (string)GetValue(selectionProperty); }
set { SetValue(selectionProperty, value); }
}
public static readonly DependencyProperty selecionadoProperty =
DependencyProperty.Register("selection", typeof(string), typeof(UCNotes), new PropertyMetadata(null));
用戶控件XAML
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Test"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:FlexGrid="using:C1.Xaml.FlexGrid"
x:Class="Fiscalizacao.UCNotes"
mc:Ignorable="d"
d:DesignHeight="327.068" Width="799.248">
<Grid Margin="10,0,10,10" Background="#FFB2B2B2" Height="303" VerticalAlignment="Bottom">
<TextBox x:Name="txtSelection" Text="{Binding selection}" Height="38" Margin="153,75,153,0" TextWrapping="Wrap" VerticalAlignment="Top" BorderBrush="Black"/>
主頁XAML
<FlexGrid:C1FlexGrid
x:Name="questionsGrid"
HorizontalAlignment="Left" Height="417" Margin="31,181,0,0" VerticalAlignment="Top" Width="1306"
AutoGenerateColumns="False" KeepCurrentVisible="True"
SelectionMode="Row" ItemsSource="{Binding list, Mode=TwoWay}">
<FlexGrid:C1FlexGrid.Columns>
<FlexGrid:Column Binding="{Binding describes}" Header="Descrição" Width="900" />
<FlexGrid:Column Binding="{Binding descibesNotes}" Header="Nota" Width="*" />
</FlexGrid:C1FlexGrid.Columns>
</FlexGrid:C1FlexGrid>
<Popup x:Name="popNotes" IsLightDismissEnabled="True" IsOpen="False" HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="1" Grid.Column="1" Margin="0,0,700,300" >
<local:UCNotes selection="{Binding SelectedItem.describes, ElementName=questionsGrid" />
</Popup>
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