重写combobox模板,实现支持过滤的combobox
先看效果图
客户提出需求后,首选在百度查找可靠方案
看了几个,效果都不理想,
大多是把isEditNable设置成true,IsTextSearchNable设置成false
再对itemsSource的集合.where或findAll 过滤后重新赋值
但是这样会有很多交互细节变得很坑 爹
翻到墙外看了一下 又看到他的实现方法,在dropDownOper事件里 对 combobox.items.Filter 传入委托,过滤方法写在委托里
在下拉框出现时 就会过滤,这里交互细节还是不够友好, 输入文本 下拉框不会自己出现, 选中时 首次输入无效..
但是看到这里已经有思路了,于是开时手写思路,重写combobox样式后 在下拉框的popup控件里 加入一个搜索用的textbox,combobox isEditAble 和 istextsearchAble 都设置为false
在搜索文本框的textChanged事件里写filter 委托 具体如下,如此解决.. xaml代码太多了放最后面,其实看完这些文字,有思路后 下面这些代码都不重要了
private void ComboBox_TextChanged(object sender, TextChangedEventArgs e) { TextBox textBox = e.OriginalSource as TextBox; ComboBox cbo = textBox.TemplatedParent as ComboBox; cbo.Items.Filter = null; cbo.Items.Filter += obj => { bool result = false; var t = obj.GetType(); var p = t.GetProperty(this.DisplayMemberPath); var text = (p.GetValue(obj) ?? "").ToString(); if (text == null) { } else { result = text.Contains(textBox.Text); } return result; }; }
<ComboBox 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:local="clr-namespace:WpfApp2" xmlns:Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero2" x:Class="WpfApp2.FilterCombobox" TextBoxBase.TextChanged="ComboBox_TextChanged" KeyDown="combobox_KeyDown" StaysOpenOnEdit="True" mc:Ignorable="d" d:DesignHeight=" Style="{DynamicResource ComboBoxStyle1}"> <ComboBox.Resources> <Style x:Key="FocusVisual"> <Setter Property="Control.Template"> <Setter.Value> <ControlTemplate> <Rectangle Margin=" StrokeDashArray="1 2"/> </ControlTemplate> </Setter.Value> </Setter> </Style> <LinearGradientBrush x:Key="ComboBox.Static.Background" EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#FFF0F0F0" Offset="0.0"/> <GradientStop Color="#FFE5E5E5" Offset="1.0"/> </LinearGradientBrush> <SolidColorBrush x:Key="ComboBox.Static.Border" Color="#FFACACAC"/> <SolidColorBrush x:Key="ComboBox.Static.Editable.Background" Color="#FFFFFFFF"/> <SolidColorBrush x:Key="ComboBox.Static.Editable.Border" Color="#FFABADB3"/> <SolidColorBrush x:Key="ComboBox.Static.Editable.Button.Background" Color="Transparent"/> <SolidColorBrush x:Key="ComboBox.Static.Editable.Button.Border" Color="Transparent"/> <SolidColorBrush x:Key="ComboBox.MouseOver.Glyph" Color="#FF000000"/> <LinearGradientBrush x:Key="ComboBox.MouseOver.Background" EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#FFECF4FC" Offset="0.0"/> <GradientStop Color="#FFDCECFC" Offset="1.0"/> </LinearGradientBrush> <SolidColorBrush x:Key="ComboBox.MouseOver.Border" Color="#FF7EB4EA"/> <SolidColorBrush x:Key="ComboBox.MouseOver.Editable.Background" Color="#FFFFFFFF"/> <SolidColorBrush x:Key="ComboBox.MouseOver.Editable.Border" Color="#FF7EB4EA"/> <LinearGradientBrush x:Key="ComboBox.MouseOver.Editable.Button.Background" EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#FFEBF4FC" Offset="0.0"/> <GradientStop Color="#FFDCECFC" Offset="1.0"/> </LinearGradientBrush> <SolidColorBrush x:Key="ComboBox.MouseOver.Editable.Button.Border" Color="#FF7EB4EA"/> <SolidColorBrush x:Key="ComboBox.Pressed.Glyph" Color="#FF000000"/> <LinearGradientBrush x:Key="ComboBox.Pressed.Background" EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#FFDAECFC" Offset="0.0"/> <GradientStop Color="#FFC4E0FC" Offset="1.0"/> </LinearGradientBrush> <SolidColorBrush x:Key="ComboBox.Pressed.Border" Color="#FF569DE5"/> <SolidColorBrush x:Key="ComboBox.Pressed.Editable.Background" Color="#FFFFFFFF"/> <SolidColorBrush x:Key="ComboBox.Pressed.Editable.Border" Color="#FF569DE5"/> <LinearGradientBrush x:Key="ComboBox.Pressed.Editable.Button.Background" EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#FFDAEBFC" Offset="0.0"/> <GradientStop Color="#FFC4E0FC" Offset="1.0"/> </LinearGradientBrush> <SolidColorBrush x:Key="ComboBox.Pressed.Editable.Button.Border" Color="#FF569DE5"/> <SolidColorBrush x:Key="ComboBox.Disabled.Glyph" Color="#FFBFBFBF"/> <SolidColorBrush x:Key="ComboBox.Disabled.Background" Color="#FFF0F0F0"/> <SolidColorBrush x:Key="ComboBox.Disabled.Border" Color="#FFD9D9D9"/> <SolidColorBrush x:Key="ComboBox.Disabled.Editable.Background" Color="#FFFFFFFF"/> <SolidColorBrush x:Key="ComboBox.Disabled.Editable.Border" Color="#FFBFBFBF"/> <SolidColorBrush x:Key="ComboBox.Disabled.Editable.Button.Background" Color="Transparent"/> <SolidColorBrush x:Key="ComboBox.Disabled.Editable.Button.Border" Color="Transparent"/> <SolidColorBrush x:Key="ComboBox.Static.Glyph" Color="#FF606060"/> <Style x:Key="ComboBoxToggleButton" TargetType="{x:Type ToggleButton}"> <Setter Property="OverridesDefaultStyle" Value="true"/> <Setter Property="IsTabStop" Value="false"/> <Setter Property="Focusable" Value="false"/> <Setter Property="ClickMode" Value="Press"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToggleButton}"> <Border x:Name="templateRoot" BorderBrush="{StaticResource ComboBox.Static.Border}" BorderThickness="{TemplateBinding BorderThickness}" Background="{StaticResource ComboBox.Static.Background}" SnapsToDevicePixels="true"> <Border x:Name=" SnapsToDevicePixels="true" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"> <Path x:Name=" VerticalAlignment="Center"/> </Border> </Border> <ControlTemplate.Triggers> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="true"/> <Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="false"/> <Condition Binding="{Binding IsPressed, RelativeSource={RelativeSource Self}}" Value="false"/> <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="true"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.Static.Editable.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.Static.Editable.Border}"/> <Setter Property="Background" TargetName="splitBorder" Value="{StaticResource ComboBox.Static.Editable.Button.Background}"/> <Setter Property="BorderBrush" TargetName="splitBorder" Value="{StaticResource ComboBox.Static.Editable.Button.Border}"/> </MultiDataTrigger> <Trigger Property="IsMouseOver" Value="true"> <Setter Property="Fill" TargetName="arrow" Value="{StaticResource ComboBox.MouseOver.Glyph}"/> </Trigger> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="true"/> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="false"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.MouseOver.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.MouseOver.Border}"/> </MultiDataTrigger> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="true"/> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="true"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.MouseOver.Editable.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.MouseOver.Editable.Border}"/> <Setter Property="Background" TargetName="splitBorder" Value="{StaticResource ComboBox.MouseOver.Editable.Button.Background}"/> <Setter Property="BorderBrush" TargetName="splitBorder" Value="{StaticResource ComboBox.MouseOver.Editable.Button.Border}"/> </MultiDataTrigger> <Trigger Property="IsPressed" Value="true"> <Setter Property="Fill" TargetName="arrow" Value="{StaticResource ComboBox.Pressed.Glyph}"/> </Trigger> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsPressed, RelativeSource={RelativeSource Self}}" Value="true"/> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="false"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.Pressed.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.Pressed.Border}"/> </MultiDataTrigger> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsPressed, RelativeSource={RelativeSource Self}}" Value="true"/> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="true"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.Pressed.Editable.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.Pressed.Editable.Border}"/> <Setter Property="Background" TargetName="splitBorder" Value="{StaticResource ComboBox.Pressed.Editable.Button.Background}"/> <Setter Property="BorderBrush" TargetName="splitBorder" Value="{StaticResource ComboBox.Pressed.Editable.Button.Border}"/> </MultiDataTrigger> <Trigger Property="IsEnabled" Value="false"> <Setter Property="Fill" TargetName="arrow" Value="{StaticResource ComboBox.Disabled.Glyph}"/> </Trigger> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="false"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.Disabled.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.Disabled.Border}"/> </MultiDataTrigger> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/> <Condition Binding="{Binding IsEditable, RelativeSource={RelativeSource AncestorType={x:Type ComboBox}}}" Value="true"/> </MultiDataTrigger.Conditions> <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource ComboBox.Disabled.Editable.Background}"/> <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource ComboBox.Disabled.Editable.Border}"/> <Setter Property="Background" TargetName="splitBorder" Value="{StaticResource ComboBox.Disabled.Editable.Button.Background}"/> <Setter Property="BorderBrush" TargetName="splitBorder" Value="{StaticResource ComboBox.Disabled.Editable.Button.Border}"/> </MultiDataTrigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <ControlTemplate x:Key="ComboBoxTemplate" TargetType="{x:Type ComboBox}"> <Grid x:Name="templateRoot" SnapsToDevicePixels="true"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition MinWidth="/> </Grid.ColumnDefinitions> <Popup x:Name=" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom"> <Themes:SystemDropShadowChrome x:Name="shadow" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=templateRoot}"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="auto"/> <RowDefinition /> </Grid.RowDefinitions> <Border BorderBrush=" Margin="0 1"> <DockPanel Background="> <Label VerticalContentAlignment="/> <TextBox Name=" VerticalContentAlignment="Center" TextChanged="ComboBox_TextChanged"/> </DockPanel> </Border> <Border Grid.Row=" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"> <ScrollViewer x:Name="DropDownScrollViewer"> <Grid x:Name="grid" RenderOptions.ClearTypeHint="Enabled"> <Canvas x:Name="> <Rectangle x:Name="opaqueRect" Fill="{Binding Background, ElementName=dropDownBorder}" Height="{Binding ActualHeight, ElementName=dropDownBorder}" Width="{Binding ActualWidth, ElementName=dropDownBorder}"/> </Canvas> <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </Grid> </ScrollViewer> </Border> </Grid> </Themes:SystemDropShadowChrome> </Popup> <ToggleButton x:Name=" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ComboBoxToggleButton}"/> <ContentPresenter x:Name="contentPresenter" ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}" Content="{TemplateBinding SelectionBoxItem}" ContentStringFormat="{TemplateBinding SelectionBoxItemStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" IsHitTestVisible="false" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="true"> <Setter Property="Margin" TargetName="shadow" Value="0,0,5,5"/> <Setter Property="Color" TargetName="shadow" Value="#71000000"/> </Trigger> <Trigger Property="HasItems" Value="false"> <Setter Property="/> </Trigger> <MultiTrigger> <MultiTrigger.Conditions> <Condition Property="IsGrouping" Value="true"/> <Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="false"/> </MultiTrigger.Conditions> <Setter Property="ScrollViewer.CanContentScroll" Value="false"/> </MultiTrigger> <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false"> <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/> <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> <SolidColorBrush x:Key="TextBox.Static.Background" Color="#FFFFFFFF"/> <Style x:Key="ComboBoxEditableTextBox" TargetType="{x:Type TextBox}"> <Setter Property="OverridesDefaultStyle" Value="true"/> <Setter Property="AllowDrop" Value="true"/> <Setter Property="/> <Setter Property="/> <Setter Property="FocusVisualStyle" Value="{x:Null}"/> <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/> <Setter Property="Stylus.IsFlicksEnabled" Value="False"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type TextBox}"> <ScrollViewer x:Name="PART_ContentHost" Background="Transparent" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/> </ControlTemplate> </Setter.Value> </Setter> </Style> <ControlTemplate x:Key="ComboBoxEditableTemplate" TargetType="{x:Type ComboBox}"> <Grid x:Name="templateRoot" SnapsToDevicePixels="true"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition MinWidth="/> </Grid.ColumnDefinitions> <Popup x:Name=" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom"> <Themes:SystemDropShadowChrome x:Name="shadow" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=templateRoot}"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="auto"/> <RowDefinition /> </Grid.RowDefinitions> <Border Grid.Row=" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"> <ScrollViewer x:Name="DropDownScrollViewer"> <Grid x:Name="grid" RenderOptions.ClearTypeHint="Enabled"> <Canvas x:Name="> <Rectangle x:Name="opaqueRect" Fill="{Binding Background, ElementName=dropDownBorder}" Height="{Binding ActualHeight, ElementName=dropDownBorder}" Width="{Binding ActualWidth, ElementName=dropDownBorder}"/> </Canvas> <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </Grid> </ScrollViewer> </Border> <Border Grid.Row="> <DockPanel > <Label VerticalAlignment="Center" Content="过滤" DockPanel.Dock="Left"/> <TextBox TextChanged="ComboBox_TextChanged" /> </DockPanel> </Border> </Grid> </Themes:SystemDropShadowChrome> </Popup> <ToggleButton x:Name=" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ComboBoxToggleButton}"/> <Border x:Name="border" Background="{StaticResource TextBox.Static.Background}" Margin="{TemplateBinding BorderThickness}"> <TextBox x:Name="PART_EditableTextBox" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}" Margin="{TemplateBinding Padding}" Style="{StaticResource ComboBoxEditableTextBox}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/> </Border> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsEnabled" Value="false"> <Setter Property="Opacity" TargetName="border" Value="0.56"/> </Trigger> <Trigger Property="IsKeyboardFocusWithin" Value="true"> <Setter Property="Foreground" Value="Black"/> </Trigger> <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="true"> <Setter Property="Margin" TargetName="shadow" Value="0,0,5,5"/> <Setter Property="Color" TargetName="shadow" Value="#71000000"/> </Trigger> <Trigger Property="HasItems" Value="false"> <Setter Property="/> </Trigger> <MultiTrigger> <MultiTrigger.Conditions> <Condition Property="IsGrouping" Value="true"/> <Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="false"/> </MultiTrigger.Conditions> <Setter Property="ScrollViewer.CanContentScroll" Value="false"/> </MultiTrigger> <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false"> <Setter Property="Canvas.Top" TargetName="opaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/> <Setter Property="Canvas.Left" TargetName="opaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> <Style x:Key="ComboBoxStyle1" TargetType="{x:Type ComboBox}"> <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/> <Setter Property="Background" Value="{StaticResource ComboBox.Static.Background}"/> <Setter Property="BorderBrush" Value="{StaticResource ComboBox.Static.Border}"/> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/> <Setter Property="/> <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/> <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/> <Setter Property="Padding" Value="6,3,5,3"/> <Setter Property="ScrollViewer.CanContentScroll" Value="true"/> <Setter Property="ScrollViewer.PanningMode" Value="Both"/> <Setter Property="Stylus.IsFlicksEnabled" Value="False"/> <Setter Property="Template" Value="{StaticResource ComboBoxTemplate}"/> <Style.Triggers> <Trigger Property="IsEditable" Value="true"> <Setter Property="IsTabStop" Value="false"/> <Setter Property="/> <Setter Property="Template" Value="{StaticResource ComboBoxEditableTemplate}"/> </Trigger> </Style.Triggers> </Style> </ComboBox.Resources> </ComboBox>
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