ListBox SelectedIndex作为命令参数
ListBox SelectedIndex作为命令参数
提问于 2020-05-07 21:40:45
如何将命令参数绑定到ListBox中选定的索引？我的代码：
<ListBox>
<i:Interaction.Triggers>
<i:EventTrigger
EventName="MouseDoubleClick">
<i:InvokeCommandAction
Command="{
Binding Path=SelectPath,
Mode=OneTime,
RelativeSource={
RelativeSource Mode=FindAncestor,
AncestorType={x:Type UserControl}
}
}"
CommandParameter="ListBox.SelectedIndex" // how can this parameter be bind to SelectedIndex
/>
</i:EventTrigger>
</i:Interaction.Triggers>
</ListBox>编辑：
我所做的和它的工作是:创建新的dp属性SelectedListBoxIndex，将其绑定到SelectedIndex，然后将属性作为命令参数传递。但有什么更好的方法吗？
<ListBox
SelectedIndex="{
Binding Path=SelectedListBoxIndex,
RelativeSource={
RelativeSource Mode=FindAncestor,
AncestorType={x:Type UserControl}
}}">
<i:Interaction.Triggers>
<i:EventTrigger
EventName="MouseDoubleClick">
<i:InvokeCommandAction
Command="{
Binding Path=SelectPath,
Mode=OneTime,
RelativeSource={
RelativeSource Mode=FindAncestor,
AncestorType={x:Type UserControl}
}
}"
CommandParameter="{
Binding Path=SelectedListBoxIndex,
RelativeSource={
RelativeSource Mode=FindAncestor,
AncestorType={x:Type UserControl}
}
}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</ListBox>Stack Overflow用户
回答已采纳
发布于 2020-05-07 22:20:08
一种方法可以是设置ListBox x:Name，然后将CommandParameter绑定到其SelectedIndex属性，如下所示：
<ListBox x:Name="lb">
<i:Interaction.Triggers>
<i:EventTrigger
EventName="MouseDoubleClick">
<i:InvokeCommandAction
Command="{
Binding Path=SelectPath,
Mode=OneTime,
RelativeSource={
RelativeSource Mode=FindAncestor,
AncestorType={x:Type UserControl}
}
}"
CommandParameter="{Binding ElementName=lb, Path=SelectedIndex}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</ListBox>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/61668216
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