由网友(超越自已)分享简介:我有如下的组合框在WPF。我知道,我可以CompositeCollection添加选项所有,但我不知道怎么办。这将是巨大的,如果有人帮我了一个简短的教程。<组合框的SelectionChanged =ComboBoxOperatingPoints_SelectionChangedX:名称=ComboBoxOper...
我有如下的组合框
在WPF。我知道,我可以CompositeCollection添加选项所有
,但我不知道怎么办。这将是巨大的,如果有人帮我了一个简短的教程。
<组合框的SelectionChanged =ComboBoxOperatingPoints_SelectionChanged
X:名称=ComboBoxOperatingPoints
DropDownOpened =ComboBoxOperatingPoints_DropDownOpened_1
字号=30
的HorizontalAlignment =右
保证金=40,40,0,0
VerticalAlignment =热门
宽度=200
身高=50
IsSynchronizedWithCurrentItem =真
的ItemsSource ={结合OperatingPoints}
的DisplayMemberPath =名
的SelectedValue ={结合OperatingPointID,UpdateSourceTrigger =的PropertyChanged,TargetNullValue =''}
SelectedValuePath =operating_point_id>
< /组合框>
解决方案
试试这个(msdn):
<组合框X:名称=ComboBoxOperatingPoints
的SelectionChanged =ComboBoxOperatingPoints_SelectionChanged
WIDTH =200高度=50
IsSynchronizedWithCurrentItem =真
的DisplayMemberPath =名
SelectedValuePath =operating_point_id>
< ComboBox.Resources>
< CollectionViewSource X:关键=comboBoxSource来源={绑定路径= OperatingPoints}/>
< /ComboBox.Resources>
< ComboBox.ItemsSource>
< CompositeCollection>
<地方:OpPoint名称=所有operating_point_id = - 1/>
< CollectionContainer集={绑定源= {的StaticResource comboBoxSource}}/>
< / CompositeCollection>
< /ComboBox.ItemsSource>
< /组合框>
I have the following ComboBox
in WPF. I know that I can add option ALL
with CompositeCollection, but I don't know how. It would be great if somebody help me out with a short tutorial.
<ComboBox SelectionChanged="ComboBoxOperatingPoints_SelectionChanged"
x:Name="ComboBoxOperatingPoints"
DropDownOpened="ComboBoxOperatingPoints_DropDownOpened_1"
FontSize="30"
HorizontalAlignment="Right"
Margin="40,40,0,0"
VerticalAlignment="Top"
Width="200"
Height="50"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding OperatingPoints}"
DisplayMemberPath="name"
SelectedValue="{Binding OperatingPointID,UpdateSourceTrigger=PropertyChanged,TargetNullValue=''}"
SelectedValuePath="operating_point_id">
</ComboBox>
解决方案
Try this (msdn):
<ComboBox x:Name="ComboBoxOperatingPoints"
SelectionChanged="ComboBoxOperatingPoints_SelectionChanged"
Width="200" Height="50"
IsSynchronizedWithCurrentItem="True"
DisplayMemberPath="name"
SelectedValuePath="operating_point_id">
<ComboBox.Resources>
<CollectionViewSource x:Key="comboBoxSource" Source="{Binding Path=OperatingPoints}" />
</ComboBox.Resources>
<ComboBox.ItemsSource>
<CompositeCollection>
<local:OpPoint name="all" operating_point_id="-1" />
<CollectionContainer Collection="{Binding Source={StaticResource comboBoxSource}}" />
</CompositeCollection>
</ComboBox.ItemsSource>
</ComboBox>
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