1
我有一個包含文本框和按鈕的WPF用戶控件。我有一個包含網格的表格，其中 第一行包含文本框 第二行包含上述用戶控件，第三行包含另一個文本框。 當窗體加載時，焦點被設置爲第一行的文本框。 當焦點設置爲用戶控件時，我需要將焦點設置到用戶控件中的文本框中。並在選項卡上將焦點設置爲用戶控件內的按鈕。當包含WPF時，焦點未設置爲子控件用戶控件獲取焦點
A
回答
0
在用戶控件中處理GotFocus事件，並使用Focus方法將焦點設置爲文本框。您可以使用KeyboardNavigation.TabIndex明確設置您的用戶控件內的標籤排序。
0
您的代碼是否遵循MVVM模式？如果是，直接在後面的視圖代碼中寫入事件處理程序可能不是一個好主意，它打破了MVVM中關注點的分離。相反，創建行爲類並在行爲中編寫事件處理程序，並將行爲綁定到視圖中的用戶控件。
示例代碼如下所示。我有一個畫布和內部cavas我有三個文本框。當cavas加載時，我需要在第一個文本框中設置焦點。類似於您的場景。
行爲的代碼
public class CanvasLoadedBehavior : Behavior<Canvas>
{
private Canvas _canvas;
protected override void OnAttached()
{
base.OnAttached();
_canvas = AssociatedObject as Canvas;
if (_canvas.Name == "ReturnRefundCanvas")
{
_canvas.Loaded += _canvas_Loaded;
}
}
void _canvas_Loaded(object sender, RoutedEventArgs e)
{
FocusNavigationDirection focusDirection = FocusNavigationDirection.Next;
// MoveFocus takes a TraveralReqest as its argument.
TraversalRequest request = new TraversalRequest(focusDirection);
UIElement elementWithFocus = Keyboard.FocusedElement as UIElement;
if (elementWithFocus != null)
{
elementWithFocus.MoveFocus(request);
}
}
}
查看代碼的結合卡瓦酒到行爲。
<Canvas Name="ReturnRefundCanvas" Height="200" Width="1466" DataContext="{Binding RefundSearchViewModel}">
<i:Interaction.Behaviors>
<b:CanvasLoadedBehavior />
</i:Interaction.Behaviors>
<uc:Keyboard Canvas.Left="973" Canvas.Top="111" ToolTip="Keyboard" RenderTransformOrigin="-2.795,9.787"></uc:Keyboard>
<Label Style="{StaticResource Devlbl}" Canvas.Left="28" Content="Return and Refund Search" Canvas.Top="10" />
<Image Height="30" Width="28" Canvas.Top="6" Canvas.Left="5" Source="pack://application:,,,/HomaKiosk;component/images/searchF.png">
<Image.OpacityMask>
<ImageBrush ImageSource="pack://application:,,,/HomaKiosk;component/images/searchF.png"/>
</Image.OpacityMask>
</Image>
<Separator Height="4" Canvas.Left="6" Margin="0" Canvas.Top="35" Width="1007"/>
<ContentControl Canvas.Top="45" Canvas.Left="21"
ContentTemplate="{StaticResource ErrorMsg}"
Visibility="{Binding Error, Converter={c:StringNullOrEmptyToVisibilityConverter}}"
Content="{Binding Error}" Width="992"></ContentControl>
<Label Style="{StaticResource Devlbl}" Canvas.Left="29" Name="FirstName" Content="First Name" Canvas.Top="90" />
<wpf:AutoCompleteTextBox Style="{StaticResource AutoComp}" Height="32" Canvas.Left="33" ToolTip="First Name" Canvas.Top="120" Width="205" Padding="10,5" TabIndex="1001"
VerticalAlignment="Top"
Watermark=""
IconPlacement="Left"
IconVisibility="Visible"
Delay="100"
Text="{Binding FirstName, Mode=TwoWay, TargetNullValue=''}"
Provider="{Binding FirstNameSuggestions}">
<wpf:AutoCompleteTextBox.ItemTemplate>
<DataTemplate>
<Border Padding="5">
<StackPanel Orientation="Vertical">
<TextBlock Text="{Binding}"
FontWeight="Bold" />
</StackPanel>
</Border>
</DataTemplate>
</wpf:AutoCompleteTextBox.ItemTemplate>
</wpf:AutoCompleteTextBox>
<Label Style="{StaticResource Devlbl}" Canvas.Left="250" Content="Last Name" Canvas.Top="90" />
<wpf:AutoCompleteTextBox Style="{StaticResource AutoComp}" Height="32" ToolTip="Last Name" Canvas.Left="250" Canvas.Top="120" Width="205" Padding="10,5" TabIndex="1002"
VerticalAlignment="Top"
Watermark=""
IconPlacement="Left"
IconVisibility="Visible"
Delay="100"
Text="{Binding LastName, Mode=TwoWay, TargetNullValue=''}"
Provider="{Binding LastNameSuggestions}">
<wpf:AutoCompleteTextBox.ItemTemplate>
<DataTemplate>
<Border Padding="5">
<StackPanel Orientation="Vertical">
<TextBlock Text="{Binding}"
FontWeight="Bold" />
</StackPanel>
</Border>
</DataTemplate>
</wpf:AutoCompleteTextBox.ItemTemplate>
</wpf:AutoCompleteTextBox>
<Label Style="{StaticResource Devlbl}" Canvas.Left="480" Content="Receipt No" Canvas.Top="90" />
<wpf:AutoCompleteTextBox Style="{StaticResource AutoComp}" Height="32" ToolTip="Receipt No" Canvas.Left="480" Canvas.Top="120" Width="205" Padding="10,5" TabIndex="1002"
VerticalAlignment="Top"
Watermark=""
IconPlacement="Left"
IconVisibility="Visible"
Delay="100"
Text="{Binding ReceiptNo, Mode=TwoWay, TargetNullValue=''}"
Provider="{Binding ReceiptIdSuggestions}">
<wpf:AutoCompleteTextBox.ItemTemplate>
<DataTemplate>
<Border Padding="5">
<StackPanel Orientation="Vertical" >
<TextBlock Text="{Binding}"
FontWeight="Bold">
</TextBlock>
</StackPanel>
</Border>
</DataTemplate>
</wpf:AutoCompleteTextBox.ItemTemplate>
<i:Interaction.Behaviors>
<b:AllowableCharactersTextBoxBehavior RegularExpression="^[0-9]+$" MaxLength="15" />
</i:Interaction.Behaviors>
</wpf:AutoCompleteTextBox>
<!--<Label Style="{StaticResource Devlbl}" Canvas.Left="710" Content="Duration" Canvas.Top="79" />-->
<!--<ComboBox AllowDrop="True" Canvas.Left="710" ToolTip="Duration" Canvas.Top="107" Width="205" TabIndex="1004"
Style="{StaticResource CommonComboBox}"
ItemsSource="{Binding Durations}" DisplayMemberPath="Description" SelectedValuePath="Id" SelectedValue="{Binding SelectedDate, Mode=TwoWay}">
</ComboBox>-->
<Button Content="Search" Style="{StaticResource MyButton}" ToolTip="Search"
Canvas.Top="116" Canvas.Left="710" Cursor="Hand"
Command="{Binding SearchCommand}" TabIndex="2001">
</Button>
<Button Content="Clear" Style="{StaticResource MyButton}" ToolTip="Clear"
Canvas.Top="116" Canvas.Left="840" Cursor="Hand"
Command="{Binding ClearCommand}" TabIndex="2002">
</Button>
<Image Height="25" Width="25" Canvas.Top="175" Canvas.Left="25" Source="pack://application:,,,/HomaKiosk;component/images/chkpending.png"/>
<Label Style="{StaticResource LegendLbl}" Canvas.Left="50" Content="Check Returned and Payment Pending" Canvas.Top="178" />
<Image Height="25" Width="25" Canvas.Top="175" Canvas.Left="300" Source="pack://application:,,,/HomaKiosk;component/images/chkrepaid.png"/>
<Label Style="{StaticResource LegendLbl}" Canvas.Left="325" Content="Repaid" Canvas.Top="178" />
<Image Height="25" Width="25" Canvas.Top="175" Canvas.Left="395" Source="pack://application:,,,/HomaKiosk;component/images/refund.png"/>
<Label Style="{StaticResource LegendLbl}" Canvas.Left="415" Content="Refunded" Canvas.Top="178" />
</Canvas>
相關問題
- 1. WPF用戶控件焦點
- 2. WPF用戶控件失去焦點
- 3. 將焦點設置爲網頁用戶控件中的子項
- 4. 聚焦WPF控件，當它獲得焦點
- 5. WPF：我如何設置用戶控件項目的焦點？
- 6. WPF：在用戶控件中設置鍵盤焦點？ （KeyBinding問題）
- 7. 如何在ASCX用戶控件中設置控件焦點？
- 8. 如何使用MVVM將焦點設置爲WPF控件？
- 9. 當文本控件失去焦點時如何獲取事件？
- 10. 將焦點設置在Perl/GTK2控件
- 11. 將焦點設置到其他控件
- 12. WPF：將焦點設置爲ItemsControl中的控件
- 13. 焦點設置到一個用戶控件時，它是可見
- 14. 爲用戶設置焦點
- 15. 使用MVVM將焦點設置到WPF中的控件
- 16. 禁用Windows控件焦點
- 17. 防止自動滾動包含控制獲取焦點時
- 18. Winforms c＃ - 將焦點設置爲TabPage的第一個子控件
- 19. WPF：自定義控件焦點管理
- 20. 當控件獲取焦點時更新ViewModel中的屬性
- 21. 用戶控件獲得焦點時發現的事件？
- 22. 用戶控件失去鍵盤焦點
- 23. 用VB6在用戶控件中設置焦點
- 24. 使用ASP.NET AJAX控件工具包設置焦點
- 25. 如何在當前焦點旁邊的控件旁邊放置WPF控件？
- 26. 如何將焦點設置爲TreeViewItem中的控件時選擇
- 27. 將焦點設置到用戶控件中的文本框中＃
- 28. 刪除焦點並獲得焦點在控件上
- 29. QT標籤控件 - 焦點
- 30. 當UC包含在detailsview控件中時，用戶控件在TextChanged回發後保留焦點不正確