wpf 如何在按钮中将列表框选定项作为命令参数传递？
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How to pass listbox selecteditem as command parameter in a button?
提问by Price Jones
Here is my situation:
这是我的情况：
<ListBox ItemsSource="{Binding Path=AvailableUsers}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Path=Id}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<Button Command="{Binding Path=Load}" CommandParameter={???? What goes here ????}/>
What I want is to pass the Id that is currently selected in the ListBox. I have a viewmodel behind the scenes that essentially looks like this:
我想要的是传递当前在 ListBox 中选择的 Id。我在幕后有一个视图模型，它基本上是这样的：
public class ViewModel : DependencyObject
{
ICommand Load { get; set; }
// dependency property but I didn't bother to write it out like one
List<User> AvailableUsers { get; set}
}
How can I send the currently selected item using the xaml?
如何使用 xaml 发送当前选定的项目？
回答by mohammad jannesary
Try this:
尝试这个：
- Name your listbox
- Update the CommandParameter to:
CommandParameter="{Binding ElementName=listBox1,Path=SelectedItem}"
- 命名您的列表框
- 将命令参数更新为：
CommandParameter="{Binding ElementName=listBox1,Path=SelectedItem}"
