Question

标准（桌面）窗口组合框有三种风格;简单，下拉列表和删除列表。 Dropdown的工作方式类似于编辑控件和组合框，而Drop List不允许编辑。

我是否遗漏了某些内容，或者Windows 8商店应用中的XAML ComboBox控件是否仅支持Drop List样式？

当我遇到这个问题时，我已经实现了一些东西，而且我看的越多，它似乎就越不受支持。

我是否真的需要使用编辑控件和列表框替换屏幕中的ComboBox？

呸。

Answer 1

感谢edward.ho.tpe的回答我在TextBox内使用ComboBoxItem给自己写了一个小EditableComboBox。如果要多次使用它，最好创建一个UserControl。

然而，我就这样做了：

风格：

<SolidColorBrush x:Key="TransparentBrush" Color="Transparent"/>
<Style x:Key="ComboBoxItemTextBox" TargetType="TextBox">
    <Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}"/>
    <Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}"/>
    <Setter Property="Foreground" Value="{ThemeResource TextBoxForegroundThemeBrush}"/>
    <Setter Property="Background" Value="{StaticResource TransparentBrush}"/>
    <Setter Property="BorderBrush" Value="{StaticResource TransparentBrush}"/>
    <Setter Property="SelectionHighlightColor" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}"/>
    <Setter Property="BorderThickness" Value="0"/>
    <Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}"/>
    <Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}"/>
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden"/>
    <Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False"/>
    <Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}"/>
    <Setter Property="Margin" Value="-10,0,0,0"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="TextBox">
                <Grid>
                    <Grid.Resources>
                        <Style x:Name="DeleteButtonStyle" TargetType="Button">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="Button">
                                        <Grid>
                                            <VisualStateManager.VisualStateGroups>
                                                <VisualStateGroup x:Name="CommonStates">
                                                    <VisualState x:Name="Normal"/>
                                                    <VisualState x:Name="PointerOver">
                                                        <Storyboard>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="BackgroundElement">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPointerOverBackgroundThemeBrush}"/>
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="BorderElement">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPointerOverBorderThemeBrush}"/>
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="GlyphElement">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPointerOverForegroundThemeBrush}"/>
                                                            </ObjectAnimationUsingKeyFrames>
                                                        </Storyboard>
                                                    </VisualState>
                                                    <VisualState x:Name="Pressed">
                                                        <Storyboard>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="BackgroundElement">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPressedBackgroundThemeBrush}"/>
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="BorderElement">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPressedBorderThemeBrush}"/>
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="GlyphElement">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPressedForegroundThemeBrush}"/>
                                                            </ObjectAnimationUsingKeyFrames>
                                                        </Storyboard>
                                                    </VisualState>
                                                    <VisualState x:Name="Disabled">
                                                        <Storyboard>
                                                            <DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BackgroundElement"/>
                                                            <DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BorderElement"/>
                                                        </Storyboard>
                                                    </VisualState>
                                                </VisualStateGroup>
                                            </VisualStateManager.VisualStateGroups>
                                            <Border x:Name="BorderElement" BorderBrush="{ThemeResource TextBoxButtonBorderThemeBrush}" BorderThickness="{TemplateBinding BorderThickness}"/>
                                            <Border x:Name="BackgroundElement" Background="{ThemeResource TextBoxButtonBackgroundThemeBrush}" Margin="{TemplateBinding BorderThickness}">
                                                <TextBlock x:Name="GlyphElement" AutomationProperties.AccessibilityView="Raw" Foreground="{ThemeResource TextBoxButtonForegroundThemeBrush}" FontStyle="Normal" FontFamily="{ThemeResource SymbolThemeFontFamily}" HorizontalAlignment="Center" Text="&#xE0A4;" VerticalAlignment="Center"/>
                                            </Border>
                                        </Grid>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </Grid.Resources>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="BackgroundElement">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledBackgroundThemeBrush}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="BorderElement">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledBorderThemeBrush}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentElement">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="PlaceholderTextContentPresenter">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Normal">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" To="{ThemeResource TextControlBackgroundThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BackgroundElement"/>
                                    <DoubleAnimation Duration="0" To="{ThemeResource TextControlBorderThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BorderElement"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="PointerOver">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" To="{ThemeResource TextControlPointerOverBackgroundThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BackgroundElement"/>
                                    <DoubleAnimation Duration="0" To="{ThemeResource TextControlPointerOverBorderThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BorderElement"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Focused"/>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="ButtonStates">
                            <VisualState x:Name="ButtonVisible"/>
                            <VisualState x:Name="ButtonCollapsed"/>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Border x:Name="BackgroundElement" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" Margin="{TemplateBinding BorderThickness}" Grid.Row="1" Grid.RowSpan="1"/>
                    <Border x:Name="BorderElement" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Grid.ColumnSpan="2" Grid.Row="1" Grid.RowSpan="1"/>
                    <ContentPresenter x:Name="HeaderContentPresenter" Grid.ColumnSpan="2" ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" Foreground="{ThemeResource TextBoxForegroundHeaderThemeBrush}" FontWeight="Semilight" Margin="0,4,0,4" Grid.Row="0"/>
                    <ScrollViewer x:Name="ContentElement" AutomationProperties.AccessibilityView="Raw" HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}" HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" IsTabStop="False" IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}" IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}" IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Grid.Row="1" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}" VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}" ZoomMode="Disabled"/>
                    <ContentControl x:Name="PlaceholderTextContentPresenter" Grid.ColumnSpan="2" Content="{TemplateBinding PlaceholderText}" Foreground="{ThemeResource TextBoxPlaceholderTextThemeBrush}" IsHitTestVisible="False" IsTabStop="False" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Grid.Row="1"/>
                    <Button x:Name="DeleteButton" BorderThickness="{TemplateBinding BorderThickness}" Grid.Column="1" FontSize="{TemplateBinding FontSize}" IsTabStop="False" Grid.Row="1" Style="{StaticResource DeleteButtonStyle}" Visibility="Collapsed" VerticalAlignment="Stretch"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

ComboBox：

<ComboBox SelectionChanged="ComboBox_SelectionChanged">
    <ComboBoxItem IsSelected="True">
        <TextBox x:Name="tbComboBox" Style="{StaticResource ComboBoxItemTextBox}" KeyDown="tbComboBox_KeyDown"/>
    </ComboBoxItem>
    <ComboBoxItem>Item 1</ComboBoxItem>
    <ComboBoxItem>Item 2</ComboBoxItem>
    <ComboBoxItem>Item 3</ComboBoxItem>
    <ComboBoxItem>Item 4</ComboBoxItem>
</ComboBox>

事件处理程序：

private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    if (e.AddedItems.Count == 1 && e.AddedItems[0] != (sender as ComboBox).Items[0])
    {
        (sender as ComboBox).SelectedIndex = 0;
        tbComboBox.Text = (e.AddedItems[0] as ComboBoxItem).Content as String;
    }
}

private void tbComboBox_KeyDown(object sender, KeyRoutedEventArgs e)
{
    if (e.Key == Windows.System.VirtualKey.Space)
    {
        if (tbComboBox.SelectionLength > 0)
        {
            tbComboBox.Text = tbComboBox.Text.Remove(tbComboBox.SelectionStart, tbComboBox.SelectionLength);
            tbComboBox.SelectionLength = 0;
        }
        int pos = tbComboBox.SelectionStart;
        tbComboBox.Text = tbComboBox.Text.Insert(pos, " ");
        tbComboBox.SelectionStart = pos + 1;
        e.Handled = true;
    }
}

基本上是这样的：

正如edward.ho.tpe建议TextBox作为ComboBox第一项的内容。 TextBox有一个自定义样式，删除背景，边框，向左移动一点（可选 - 但我喜欢它，因为它提供了更多的空间来写），并更改删除按钮以保持折叠状态。 SelectionChanged事件处理程序确保TextBox保持SelectedItem，并且仅根据所选项目的内容和Text事件处理程序更改KeyDown处理空间keydown，否则会触发ComboBox的下拉列表。

Answer 2

Syncfusion Controls for WinRT也包含一个ComboBox。但它不是免费的。

Answer 3

由于WinRT中的组合框项目可以是任何内容，您可以：

<ComboBoxItem>
<TextBox Text="something"/>
</ComboBoxItem>

当用户点击该项目时，他/她可以编辑其内容。

由您决定是否将编辑结果更改为该项目的编辑框，或者只是将新的组合框项目添加到该组合框中。在LostFocus事件中处理此事。

Answer 4

你没有遗漏任何东西。开箱即用的工具箱中没有可编辑的组合框。

你可能已经尝试过winrt xaml工具包@ http://winrtxamltoolkit.codeplex.com/ 但那也没有。太糟糕了，因为它是免费的。

您可能已经查看过ComponentOne @ http://www.componentone.com/SuperProducts/StudioWinRTXAML/ 但那也没有。

你可能已经看过Infragistics @ http://www.infragistics.com/products/technology-previews/windows8/ 但该工具包仍在“预览”中。

你可能已经看过Telerik @ http://www.telerik.com/products/windows-8/overview.aspx 他们有一个组合框http://www.telerik.com/products/windows-8/controls/combo-box.aspx

但你可能想要一些免费的东西。目前没有Microsoft XAML Toolkit。因此，您需要构建自己的或找到一个开源项目。我此时找不到这样的项目。

但是什么是可编辑的组合框呢？一个标准的组合框和一个文本框，对吧？

Answer 5

通过设置

combobox.ComboBoxMode = ComboBoxModes.Editable

在syncfusion SfComboBox中，您可以编辑组合框。

此致

Elavarasan M

Answer 6

尝试名为AutoSuggestBox

的UIControl

<AutoSuggestBox PlaceholderText="Company">
     <AutoSuggestBox.QueryIcon>
         <SymbolIcon Symbol="find"/>
     </AutoSuggestBox.QueryIcon>
</AutoSuggestBox>

Answer 7

我知道这是一个老问题，但是对于像我这样的新搜索者，我发现ComboBox.IsEditable属性很好

Answer 8

我到处搜索了一个可搜索的组合框，并决定自己编写。它不像您的可编辑组合框，但会在键入时过滤组合框中的选项。也许这可以帮助别人。

您可以像这样定义一个新控件：

<control:SearchableComboBox Margin='5'
          x:Name='ComboBoxCountry'
          ItemsSourceList='{Binding CountryList}'
          ItemsSourceListBase='{Binding CountryListBase}'
          PlaceholderText='Select Country'/>

不幸的是，你仍然需要提供一个重复的列表，CountryListBase。如果您有改进建议，请告诉我们！

using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using Windows.System;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Input;

namespace eMoyoConnect.Controls
{
    public class SearchableComboBox : ComboBox
    {

        public ObservableCollection<string> ItemsSourceList
        {
            get { return (ObservableCollection<string>)GetValue(ItemsSourceListProperty); }
            set
            {
                SetValue(ItemsSourceListProperty, value);
                this.ItemsSource = ItemsSourceList;
            }
        }

        public static readonly DependencyProperty ItemsSourceListProperty =
            DependencyProperty.Register("ItemsSourceList", typeof(ObservableCollection<string>), typeof(SearchableComboBox),
            new PropertyMetadata(null, ItemsSourceListChanged));

        private static void ItemsSourceListChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var plv = d as SearchableComboBox;
            plv.ItemsSource = e.NewValue;
        }

        public Collection<string> ItemsSourceListBase
        {
            get { return (Collection<string>)GetValue(ItemsSourceListBaseProperty); }
            set
            {
                SetValue(ItemsSourceListBaseProperty, value);
                this.ItemsSource = ItemsSourceListBase;
            }
        }

        public static readonly DependencyProperty ItemsSourceListBaseProperty =
            DependencyProperty.Register("ItemsSourceListBase", typeof(Collection<string>), typeof(SearchableComboBox),
            new PropertyMetadata(null, ItemsSourceListBaseChanged));

        private static void ItemsSourceListBaseChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var plv = d as SearchableComboBox;
            plv.ItemsSource = e.NewValue;
        }

        string FilterString = "";
        protected override void OnKeyDown(KeyRoutedEventArgs e)
        {
            if (IsLetterOrSpace(e.Key))
            {
                if (e.Key == VirtualKey.Space)
                    FilterString += " ";
                else
                    FilterString += e.Key.ToString();
                FilterList(FilterString);
                this.ItemsSource = ItemsSourceList;
                if (ItemsSourceList.Count > 0)
                    this.SelectedIndex = 0;
            }
            else if (e.Key == VirtualKey.Back)
            {
                if (FilterString.Length > 0)
                {
                    FilterString = FilterString.Substring(0, FilterString.Length - 1);
                    FilterList(FilterString);
                    this.ItemsSource = ItemsSourceList;
                    if (ItemsSourceList.Count > 0)
                        this.SelectedIndex = 0;
                }
            }

            if (e.Key != VirtualKey.Space)
            {
                base.OnKeyDown(e);
            }
        }

        protected override void OnGotFocus(RoutedEventArgs e)
        {
            string selectedValue = "";
            if (this.SelectedValue != null)
                selectedValue = (string)this.SelectedValue;
            FilterString = "";
            FilterList(FilterString);
            if (!string.IsNullOrEmpty(selectedValue))
                this.SelectedValue = selectedValue;
        }

        internal void FilterList(string FilterString)
        {
            ItemsSourceList.Clear();
            IEnumerable<string> list;
            if (!string.IsNullOrEmpty(FilterString))
                list = ItemsSourceListBase.Where(x => x.StartsWith(FilterString));
            else
                list = ItemsSourceListBase;
            foreach (var item in list)
                ItemsSourceList.Add(item);
        }

        private bool IsLetterOrSpace(VirtualKey key)
        {
            return (key == VirtualKey.A
                || key == VirtualKey.B
                || key == VirtualKey.C
                || key == VirtualKey.D
                || key == VirtualKey.E
                || key == VirtualKey.F
                || key == VirtualKey.G
                || key == VirtualKey.H
                || key == VirtualKey.I
                || key == VirtualKey.J
                || key == VirtualKey.K
                || key == VirtualKey.L
                || key == VirtualKey.M
                || key == VirtualKey.N
                || key == VirtualKey.O
                || key == VirtualKey.P
                || key == VirtualKey.Q
                || key == VirtualKey.R
                || key == VirtualKey.S
                || key == VirtualKey.T
                || key == VirtualKey.U
                || key == VirtualKey.V
                || key == VirtualKey.W
                || key == VirtualKey.X
                || key == VirtualKey.Y
                || key == VirtualKey.Z
                || key == VirtualKey.Space);
        }
    }
}

在WinRT中等效的可编辑ComboBox？

8 个答案:

风格：

ComboBox：

事件处理程序：

基本上是这样的：