には と の 2 つのユーザー コントロールMainWindow.xamlがSidePannelありDescriptionます。私はDictionaryModelオブジェクトを渡しています。DictionaryModelオブジェクトには、 のコレクションとWordsと呼ばれる別のオブジェクトがありますSidePannelModel。には、文字列プロパティSidePannelModelの別のコレクションがあります。Words
DictionaryModel
public class DictionaryModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public SidePannelModel SideModel { get; set; }
public IEnumerable<WordModel> Language2 { get; set; }
public void ToggleLanguage()
{
var temp = this.Language2;
this.Language2 = this.SideModel.Language1;
this.SideModel.Language1 = temp;
OnPropertyChanged("DictionaryChanged");
}
protected void OnPropertyChanged(string name)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(name));
}
}
SidePannelModel
public class SidePannelModel
{
public IEnumerable<WordModel> Language1 { get; set; }
public string SearchWord { get; set; }
}
で DictionaryModel を DataContext に渡していMainWindow.xaml.csます。
public partial class MainWindow : Window
{
private DictionaryModel dictionary;
public MainWindow()
{
InitializeComponent();
dictionary = new DictionaryModel
{
SideModel = new SidePannelModel {
SearchWord=null,
Language1 = new List<WordModel>()
{
new WordModel() { Word = "Test1" }
, new WordModel() { Word = "Test2" }
, new WordModel() { Word = "Test3" }
, new WordModel() { Word = "Test4" }
, new WordModel() { Word = "Test5" }
, new WordModel() { Word = "Test6" }
, new WordModel() { Word = "Test7" }
, new WordModel() { Word = "Test8" }
, new WordModel() { Word = "Test9" }
, new WordModel() { Word = "Test10" }
} as IEnumerable<WordModel>
},
Language2 = new List<WordModel>()
{
new WordModel() { Word = "Test1" }
, new WordModel() { Word = "Test2" }
, new WordModel() { Word = "Test3" }
, new WordModel() { Word = "Test4" }
, new WordModel() { Word = "Test5" }
, new WordModel() { Word = "kkkkk" }
, new WordModel() { Word = "Test7" }
, new WordModel() { Word = "Test8" }
, new WordModel() { Word = "Test9" }
, new WordModel() { Word = "Test10" }
} as IEnumerable<WordModel>,
};
this.DataContext = dictionary;
}
}
これは、 Collection と をユーザーコントローラーに渡すWords方法SidePannelModelですManiWindow.xaml
<Window x:Class="ThaiDictionary.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:sidePanel="clr-namespace:ThaiDictionary"
Title="MainWindow"
Height="619">
<Window.Resources>
<Style TargetType="{x:Type ToggleButton}"
x:Key="toggleButtonStyle">
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Content" Value="Thai to English" />
</Trigger>
<Trigger Property="IsChecked" Value="False">
<Setter Property="Content" Value="English to Thai" />
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid Margin="0,0,2,0">
<DockPanel LastChildFill="True">
<Menu IsMainMenu="True" DockPanel.Dock="Top">
<MenuItem Header="_File" />
<MenuItem Header="_Edit" />
<MenuItem Header="_View" />
<MenuItem Header="_Window" />
<MenuItem Header="_Help" />
</Menu>
<StatusBar Height="22" DockPanel.Dock="Bottom"/>
<sidePanel:SidePanel SideModel="{Binding SidePModel, Mode=TwoWay}" DockPanel.Dock="Left" MinWidth="200" MinHeight="540" Margin="5,5,5,1" Width="196"/>
<DockPanel LastChildFill="True" DockPanel.Dock="Left">
<ToggleButton IsChecked="False" DockPanel.Dock="Top" HorizontalAlignment="Left" Height="30" Width="150" Style="{StaticResource toggleButtonStyle}" Checked="ToggleButton_Checked" Unchecked="ToggleButton_Unchecked">
</ToggleButton>
<sidePanel:Description DockPanel.Dock="Top" WordsList2="{Binding Language2, Mode=TwoWay}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
</DockPanel>
</DockPanel>
</Grid>
SideModelで定義されていSidePannel.xaml.csます。
public partial class SidePanel : UserControl
{
public static DependencyProperty SideModelProperty;
static SidePanel()
{
SideModelProperty = DependencyProperty.Register("SideModel", typeof(SidePannelModel), typeof(SidePanel));
}
public SidePanel()
{
InitializeComponent();
}
public SidePannelModel SideModel
{
get
{
return (SidePannelModel)GetValue(SideModelProperty);
}
set
{
SetValue(SideModelProperty, value);
}
}
}
しかし、コントローラーには、私が期待しSidePanelている s がロードされていません。Word
の適切な部分をSidePanel.xaml以下に示します。
<UserControl x:Class="ThaiDictionary.SidePanel"
x:Name="SidePannelController"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:l="clr-namespace:ThaiDictionary"
mc:Ignorable="d" MinHeight="300" MinWidth="300" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Background="Azure">
<UserControl.Resources>
</UserControl.Resources>
<DockPanel LastChildFill="True" DataContext="{Binding SidePModel}">
<l:SearchTextBox SearchEventTimeDelay="00:00:02.00" Text="{Binding ElementName= SidePannelController, Path= SearchWord, Mode=TwoWay}" DockPanel.Dock="Top" Search="SearchTextBox_Search" HorizontalAlignment="Stretch" Background="Bisque"/>
<ListBox Name="LeftSidePnel1" ItemsSource="{Binding ElementName= SidePannelController, Path= Language1, Mode=TwoWay}" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" ScrollViewer.CanContentScroll="True" ScrollViewer.VerticalScrollBarVisibility="Visible" ItemTemplate="{DynamicResource WordTemplate}" MinHeight="266" Height="auto" >
<ListBox.Resources>
<DataTemplate x:Key="WordTemplate">
<Label Content="{Binding Word}" HorizontalAlignment="Left" VerticalAlignment="Top" Width="auto"/>
</DataTemplate>
</ListBox.Resources>
</ListBox>
</DockPanel>
しかし、プロジェクトを実行すると、サイドパネル ユーザー コントロールに読み込まれた単語が表示されません。このコードの何が問題なのですか。ここから抜け出す方法が見つかりません。すぐに助けてもらえますか。
編集：
命名規則に従い、SidePannel.xaml.cs.
バインディング エラー:
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=SidePanelController'. BindingExpression:Path=SearchWord; DataItem=null; target element is 'SearchTextBox' (Name=''); target property is 'Text' (type 'String')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=SidePanelController'. BindingExpression:Path=Language1; DataItem=null; target element is 'ListBox' (Name='LeftSidePnel1'); target property is 'ItemsSource' (type 'IEnumerable')
完全な SidePanel.xaml を追加し、ElementName を xaml ファイルのように SidePannelController に変更しました。しかし、まだ単語を読み込んでいません
新しい編集:
System.Windows.Data Information: 41 : BindingExpression path error: 'SearchWord' property not found for 'object' because data item is null. This could happen because the data provider has not produced any data yet. BindingExpression:Path=SideModel.SearchWord; DataItem='SidePanel' (Name='SidePannelController'); target element is 'SearchTextBox' (Name=''); target property is 'Text' (type 'String')
System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=SideModel.SearchWord; DataItem='SidePanel' (Name='SidePannelController'); target element is 'SearchTextBox' (Name=''); target property is 'Text' (type 'String')
System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=SideModel.SearchWord; DataItem='SidePanel' (Name='SidePannelController'); target element is 'SearchTextBox' (Name=''); target property is 'Text' (type 'String')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=SideModel.SearchWord; DataItem='SidePanel' (Name='SidePannelController'); target element is 'SearchTextBox' (Name=''); target property is 'Text' (type 'String')
System.Windows.Data Information: 41 : BindingExpression path error: 'Language1' property not found for 'object' because data item is null. This could happen because the data provider has not produced any data yet. BindingExpression:Path=SideModel.Language1; DataItem='SidePanel' (Name='SidePannelController'); target element is 'ListBox' (Name='LeftSidePnel1'); target property is 'ItemsSource' (type 'IEnumerable')
System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=SideModel.Language1; DataItem='SidePanel' (Name='SidePannelController'); target element is 'ListBox' (Name='LeftSidePnel1'); target property is 'ItemsSource' (type 'IEnumerable')
System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=SideModel.Language1; DataItem='SidePanel' (Name='SidePannelController'); target element is 'ListBox' (Name='LeftSidePnel1'); target property is 'ItemsSource' (type 'IEnumerable')
ありがとう