Optionally select combo boxes for multiple items.

[TemplatePart(Name = ElementPanel, Type = typeof(Panel))]
[TemplatePart(Name = ElementSelectAll, Type = typeof(CheckComboBoxItem))]
public class CheckComboBox : ListBox, IDataInput

Attributes

Property	Description	Default Value	Remarks
MaxDropDownHeight	The maximum height of the drop-down content
IsDropDownOpen	Whether the drop-down box is expanded	false
TagStyle	Check mark style
ShowSelectAllButton	Whether to show all selected buttons	false

Additional attributes

Property	Description	Default Value	Remarks
InfoElement.Placeholder	Placeholder
InfoElement.Necessary	Is it required	false
InfoElement.Symbol	Required mark	●
InfoElement.ContentHeight	Content Height	30	Available when the title is above
InfoElement.MinContentHeight	Minimum content height	30	Available when the title is on the top
TitleElement.Title	Title
TitleElement.TitlePlacement	Title Alignment	TitlePlacementType.Top
TitleElement.TitleWidth	TitleWidth	120
DropDownElement.ConsistentWidth	Whether the drop-down content is the same as the width of the drop-down box	false
IsReadOnly

Style

Style	Description
CheckComboBoxBaseStyle	Default Style
CheckComboBoxExtendBaseStyle	Default extended style
CheckComboBoxPlusBaseStyle	Default Enhanced Style
CheckComboBoxExtend	Extended Style
CheckComboBoxPlus	Enhanced Style
Tag4CheckComboBoxStyle.Small
CheckComboBox.Small
CheckComboBoxExtend.Small
CheckComboBoxPlus.Small
CheckComboBoxItem.Small

Case

<hc:CheckComboBox>
    <hc:CheckComboBoxItem Content="Item 1"/>
    <hc:CheckComboBoxItem Content="Item 2"/>
    <hc:CheckComboBoxItem Content="Item 3"/>
</hc:CheckComboBox>

Or

<StackPanel Margin="32" Orientation="Horizontal">
    <StackPanel>
        <hc:CheckComboBox ShowClearButton="True" MaxWidth="380" ItemsSource="{Binding DataList}" ShowSelectAllButton="True"/>
        <hc:CheckComboBox MaxWidth="380" ItemsSource="{Binding DataList}" Style="{StaticResource CheckComboBoxExtend}" Margin="0,16,0,0"  IsEnabled="False" ShowSelectAllButton="True"/>
        <hc:CheckComboBox ShowClearButton="True" MaxWidth="380" ItemsSource="{Binding DataList}" Style="{StaticResource CheckComboBoxExtend}" hc:InfoElement.Title="TitleDemoStr1" Margin="0,32,0,0" ShowSelectAllButton="True"/>
        <hc:CheckComboBox MaxWidth="380" ItemsSource="{Binding DataList}" hc:InfoElement.Placeholder="PlsEnterContent" hc:InfoElement.Title="TitleDemoStr2" Style="{StaticResource CheckComboBoxExtend}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
        <hc:CheckComboBox ShowClearButton="True" Width="380" ItemsSource="{Binding DataList}" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" Style="{StaticResource CheckComboBoxExtend}" hc:InfoElement.Title="TitleDemoStr3" Margin="0,32,0,0" ShowSelectAllButton="True"/>
        <hc:CheckComboBox Width="380" ItemsSource="{Binding DataList}" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Placeholder="PlsEnterContent" hc:InfoElement.Title="TitleDemoStr3" Style="{StaticResource CheckComboBoxExtend}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
    </StackPanel>
    <StackPanel Margin="32,0,0,0">
        <hc:CheckComboBox ShowClearButton="True" MaxWidth="380" ItemsSource="{Binding DataList}" Style="{StaticResource CheckComboBoxPlus}" ShowSelectAllButton="True"/>
        <hc:CheckComboBox MaxWidth="380" ItemsSource="{Binding DataList}" Margin="0,16,0,0" IsEnabled="False" Style="{StaticResource CheckComboBoxPlus}"/>
        <hc:CheckComboBox MaxWidth="380" ShowClearButton="True" ItemsSource="{Binding DataList}" Style="{StaticResource CheckComboBoxPlus}" hc:InfoElement.Title="TitleDemoStr1" Margin="0,32,0,0" ShowSelectAllButton="True"/>
        <hc:CheckComboBox MaxWidth="380" ItemsSource="{Binding DataList}" hc:InfoElement.Placeholder="PlsEnterContent" hc:InfoElement.Title="TitleDemoStr2" Style="{StaticResource CheckComboBoxPlus}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
        <hc:CheckComboBox MaxWidth="380" ItemsSource="{Binding DataList}" ShowClearButton="True" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" Style="{StaticResource CheckComboBoxPlus}" hc:InfoElement.Title="TitleDemoStr3" Margin="0,32,0,0" ShowSelectAllButton="True"/>
        <hc:CheckComboBox MaxWidth="380" ItemsSource="{Binding DataList}" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Placeholder="PlsEnterContent" hc:InfoElement.Title="TitleDemoStr3" Style="{StaticResource CheckComboBoxPlus}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
    </StackPanel>
</StackPanel>