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---
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title: 建设中
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title: ComboBox 组合框
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---
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建设中
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原生组合框的HC扩展。
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```cs
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public class ComboBox : System.Windows.Controls.ComboBox, IDataInput
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```
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# 属性
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|属性|描述|默认值|备注|
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|VerifyFunc|数据验证委托|||
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|IsError|数据是否错误|false||
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|ErrorStr|错误提示|||
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|TextType|文本类型|||
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|ShowClearButton|是否显示清除按钮|false||
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|AutoComplete|是否自动完成输入|false|||
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# 附加属性
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|属性|描述|默认值|备注|
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|InfoElement.Placeholder|占位符|||
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|InfoElement.Necessary|是否必填|false||
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|InfoElement.Symbol|必填标记|●||
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|InfoElement.ContentHeight|内容高度|30|标题在上时可用|
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|InfoElement.MinContentHeight|最小内容高度|30|标题在上时可用|
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|TitleElement.Title|标题|||
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|TitleElement.TitlePlacement|标题对齐方式|TitlePlacementType.Top||
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|TitleElement.TitleWidth|标题宽度|120|||
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# 方法
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|方法|描述|备注|
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|VerifyData|验证数据|可手动触发验证|
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# 样式
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|样式|描述|
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|-|-|
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|ComboBoxPlusBaseStyle|默认样式|
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# 案例
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原生功能在扩展ComboBox上行为一致。
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```xml
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<StackPanel Margin="32">
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<hc:ComboBox ShowClearButton="True" ItemsSource="{Binding DataList}" SelectedIndex="0"/>
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<hc:ComboBox ItemsSource="{Binding DataList}" Margin="0,16,0,0" SelectedIndex="0" IsEnabled="False"/>
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<hc:ComboBox ShowClearButton="True" ItemsSource="{Binding DataList}" SelectedIndex="0" Margin="0,16,0,0" IsEditable="True"/>
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<hc:ComboBox ItemsSource="{Binding DataList}" SelectedIndex="0" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
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<hc:ComboBox ShowClearButton="True" ItemsSource="{Binding DataList}" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}" hc:InfoElement.Necessary="True" Margin="0,32,0,0"/>
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<hc:ComboBox ItemsSource="{Binding DataList}" IsEditable="True" SelectedIndex="0" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
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<hc:ComboBox AutoComplete="True" ShowClearButton="True" ItemsSource="{Binding DataList}" IsEditable="True" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}" hc:InfoElement.Necessary="True" Margin="0,32,0,0"/>
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<hc:ComboBox ItemsSource="{Binding DataList}" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
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<hc:ComboBox ShowClearButton="True" ItemsSource="{Binding DataList}" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" hc:InfoElement.Necessary="True" Margin="0,32,0,0"/>
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<hc:ComboBox ItemsSource="{Binding DataList}" IsEditable="True" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
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<hc:ComboBox AutoComplete="True" ShowClearButton="True" ItemsSource="{Binding DataList}" IsEditable="True" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" hc:InfoElement.Necessary="True" Margin="0,32,0,0"/>
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</StackPanel>
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```
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