Question

wpf 实现为textbox添加下拉框

WPF 中 combox 不能直接写入数据：需要实现功能：1.直接从键盘输入数据，2，具有下拉列表可供用户选择输入，用combox 实现，textbox实现也可以，或者自定义控件也可以

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Answer 1

1. 设置属性 IsEditable="True" Combobox就可编辑
2. 下拉框正常绑定数据就行，如果像上图每个Item都有个删除功能，那就需要重写样式，可参考下面的代码(带有动画效果，可删除)

<Style TargetType="{x:Type ComboBoxItem}">

<Setter Property="SnapsToDevicePixels"
Value="true"/>

<Setter
Property="HorizontalContentAlignment" Value="Stretch"/>

<Setter
Property="VerticalContentAlignment" Value="Center"/>

<Setter Property="Padding"
Value="3"/>

<Setter Property="Focusable"
Value="False"/>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate
TargetType="{x:Type ComboBoxItem}">

<Grid SnapsToDevicePixels="true" FocusVisualStyle="{x:Null}">

<Rectangle x:Name="BackgroundHighlight" FocusVisualStyle="{x:Null}"
Margin="-1" Stroke="#A0FFFFFF"/>

<ContentPresenter
Content="{Binding LoginName}" FocusVisualStyle="{x:Null}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
x:Name="contentPresenter" Margin="{TemplateBinding Padding}"/>

<Button Width="30"
Height="30" HorizontalAlignment="Right" Tag="{Binding LoginName}"
Style="{StaticResource CloseButton}" Click="BtnDeleteRecord_Click"/>

</Grid>

<ControlTemplate.Triggers>

<Trigger
Property="IsMouseOver" Value="True">

<Trigger.ExitActions>

<BeginStoryboard
Storyboard="{StaticResource HoverOff}"
x:Name="HoverOff_BeginStoryboard"/>

</Trigger.ExitActions>

<Trigger.EnterActions>

<BeginStoryboard
Storyboard="{StaticResource HoverOn}"
x:Name="HoverOn_BeginStoryboard"/>

</Trigger.EnterActions>

</Trigger>

<Trigger
Property="IsHighlighted" Value="true"/>

<Trigger
Property="Selector.IsSelected" Value="True">

<Trigger.ExitActions>

<BeginStoryboard
Storyboard="{StaticResource SelectedOff}"
x:Name="SelectedOff_BeginStoryboard1"/>

</Trigger.ExitActions>

<Trigger.EnterActions>

<BeginStoryboard
Storyboard="{StaticResource SelectedOn}"
x:Name="SelectedOn_BeginStoryboard1"/>

</Trigger.EnterActions>

</Trigger>

</ControlTemplate.Triggers>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

追问

这些代码写在哪个文件啊？