高级绑定(先到xml,然后到其他东西)
本文关键字:其他 然后 绑定 先到 xml 高级 | 更新日期: 2023-09-27 18:20:48
首先对标题感到抱歉。我知道这还不太清楚,但我想不出其他什么了。如果有人想让我改变它,请给出你的建议(请注意,否决权不是正确的解决方案),谢谢。现在是我的问题。我有一个xml,看起来像这样:
<scenarios-list>
<scenario name="Fuori casa" value="fuori-casa">
<lights>
<lights-group name="soggiorno">
<lights-item name="portone" outputChannelName="Luci|Appartamento|Portone|DO_Stato" inputChannelName="Luci|Appartamento|Portone|DI_On_Off">off</lights-item>
<lights-item name="soggiorno-principale" outputChannelName="Luci|Appartamento|Soggiorno_Principale|DO_Stato" inputChannelName="Luci|Appartamento|Soggiorno_Principale|DI_On_Off">off</lights-item>
<lights-item name="soggiorno-secondario" outputChannelName="Luci|Appartamento|Soggiorno_Secondario|DO_Stato" inputChannelName="Luci|Appartamento|Soggiorno_Secondario|DI_On_Off">off</lights-item>
<lights-item name="parete-zona-cucina" outputChannelName="Luci|Appartamento|Parete_Zona_Cucina|DO_Stato" inputChannelName="Luci|Appartamento|Parete_Zona_Cucina|DI_On_Off">off</lights-item>
<lights-item name="finestra-soggiorno" outputChannelName="Luci|Appartamento|Finestra_Soggiorno|DO_Stato" inputChannelName="Luci|Appartamento|Finestra_Soggiorno|DI_On_Off">off</lights-item>
</lights-group>
... (lots of <lights-group> here)
</lights>
... (lots of <lights> here)
</scenario>
...(lots of <scenario> here)
</scenarios-list>
我有一个用户控件,用户可以在其中查看和编辑以下场景:
<Grid Name="BaseGrid">
<Grid.Resources>
<XmlDataProvider **x:Name="ScenesXmlName"** x:Key="ScenesXml" XPath="scenari-list/scenario" Source="C:'Users'andrea'RSSReaderSubscriptions-5.xml"/>
</Grid.Resources>
<ComboBox Name="ScenariCombo"
**ItemsSource="{Binding Source={StaticResource ScenesXml}}" DisplayMemberPath="@name"**/>
<StackPanel>
<ListBox Name="LightsList" **ItemsSource="{Binding Source={StaticResource ScenesXml}, XPath=lights/lights-group}**">
<ListBox.ItemTemplate>
<DataTemplate>
<Expander Name="LightsExpander" **Header="{Binding XPath=@name}"** >
<ListBox>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Label **Content="{Binding XPath=ligths-item@name}"** />
<CheckBox />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Expander>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</StackPanel>
</Grid>
所以基本上我想:
- 将
<scenarios-list>
加载到组合框中(仅显示场景名称)[我的代码已经做到了] - 将
<lights-group>
列表加载到基于所选组合框项目的列表框中(仅显示灯光组的名称)[即使出现此错误,我的代码也已经执行了此操作:
System.Windows.Data错误:43:具有XPath的BindingExpression无法绑定到非XML对象。;XPath='lights/lights-group'绑定表达式:Path=;DataItem="XmlDataCollection"(哈希代码=56809051);目标元素是"ListBox"(名称="LightsList");目标属性为"ItemsSource"(类型为"IEnumerable")XmlDataCollection:"MS.Internal.Data.XmlDataCollection"
- 在每个扩展器中加载
<lights-group>
中包含的所有<lights-item>
[我对如何做到这一点一无所知]
你能帮我吗?
我成功地使用了以下代码:
<Grid Name="BaseGrid">
<Grid.Resources>
<XmlDataProvider x:Name="ScenesXmlName" x:Key="ScenesXml" XPath="scenari-list/scenario" Source="myPath"/>
</Grid.Resources>
<ComboBox Grid.Column="0" Grid.Row="1" Name="ScenariCombo" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding Source={StaticResource ScenesXml}}" DisplayMemberPath="@name"/>
<StackPanel>
<ListBox Name="LightsList" ItemsSource="{Binding Source={StaticResource ScenesXml}, XPath=lights/lights-group}">
<ListBox.ItemTemplate>
<DataTemplate>
<Expander Header="{Binding XPath=@name}" HorizontalAlignment="Stretch">
<ListBox IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding XPath=lights-item}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="150" />
</Grid.ColumnDefinitions>
<Label Content="{Binding XPath=@name}" Grid.Column="0"/>
<CheckBox Grid.Column="1" IsChecked="{Binding XPath=., Converter={StaticResource myStateToBoolConverter}}"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Expander>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</Grid>
因此,关键似乎是IsSynchronized="true"。希望这对其他人有用。