wpf 如何使用 XAML 中的选定值制作简单的组合框？
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How to make simple combobox with selected value in XAML?
提问by Edward Tanguay
What is the correct syntax to select a combobox item with value(not index) in pure XAML?
在纯 XAML 中选择具有值（不是索引）的组合框项的正确语法是什么？
Doesn't work:
不起作用：
<StackPanel>
<ComboBox SelectedValue="CA">
<ComboBoxItem Tag="CO">Colorado</ComboBoxItem>
<ComboBoxItem Tag="CA">California</ComboBoxItem>
<ComboBoxItem Tag="NM">New Mexico</ComboBoxItem>
</ComboBox>
</StackPanel>
Doesn't work:
不起作用：
<StackPanel>
<ComboBox SelectedValue="CA">
<ComboBoxItem Value="CO">Colorado</ComboBoxItem>
<ComboBoxItem Value="CA">California</ComboBoxItem>
<ComboBoxItem Value="NM">New Mexico</ComboBoxItem>
</ComboBox>
</StackPanel>
Even this doesn't work:
即使这不起作用：
<ComboBox SelectedValue="Colorado">
<ComboBoxItem Tag="CO">Colorado</ComboBoxItem>
<ComboBoxItem Tag="CA">California</ComboBoxItem>
<ComboBoxItem Tag="NM">New Mexico</ComboBoxItem>
</ComboBox>
This doesn't work:
这不起作用：
<StackPanel>
<ComboBox SelectedItem="CA">
<ComboBoxItem Tag="CO">Colorado</ComboBoxItem>
<ComboBoxItem Tag="CA">California</ComboBoxItem>
<ComboBoxItem Tag="NM">New Mexico</ComboBoxItem>
</ComboBox>
</StackPanel>
回答by martin
I think this should work. Have a try.
我认为这应该有效。试试。
<StackPanel>
<ComboBox>
<ComboBoxItem Tag="CO">Colorado</ComboBoxItem>
<ComboBoxItem Tag="CA" IsSelected="True">California</ComboBoxItem>
<ComboBoxItem Tag="NM">New Mexico</ComboBoxItem>
</ComboBox>
</StackPanel>
回答by Dwsgg
<ComboBox SelectedValuePath="Content" SelectedValue="{Binding Source="...", Path="..."}">
<ComboBoxItem Content="..." isSelected="true"/>
<ComboBoxItem Content="..." />
<ComboBoxItem Content="..." />
</ComboBox>
It should work with content, tag... or any other property you'd like to bind.
它应该适用于内容、标签...或您想要绑定的任何其他属性。
回答by Swapnil Karmalkar
<StackPanel>
<ComboBox AllowDrop="True">
<ComboBoxItem Tag="CO">Colorado</ComboBoxItem>
<ComboBoxItem Tag="CA" IsSelected="True">California</ComboBoxItem>
<ComboBoxItem Tag="NM">New Mexico</ComboBoxItem>
</ComboBox>
</StackPanel>
You need to set AllowDrop="True" for the combobox and isselected for the item.
您需要为组合框设置 AllowDrop="True" 并为项目选择。
回答by Konamiman
The ComboBox element has a SelectedItemproperty, maybe this is the one you need.
ComboBox 元素有一个SelectedItem属性，也许这就是你需要的。
