[英]WPF MVVM ComboBox Tag Selection
I have a ComboBox that has a declared ComboBox.Items list (in other words, not dynamically bound via ItemsSource). 我有一个ComboBox,它有一个声明的ComboBox.Items列表(换句话说,不是通过ItemsSource动态绑定)。 I use the ComboBoxItem.Content for the display name and ComboBoxItem.Tag for the corresponding Id as shown below. 我使用ComboBoxItem.Content作为显示名称,使用ComboBoxItem.Tag作为相应的Id,如下所示。
How do I get the Tag of the selected item return and not the content? 如何获取所选项目的标签而不是内容? I tried SelectedItemValuePath="Tag"
, but that does not work. 我尝试了SelectedItemValuePath="Tag"
,但这不起作用。
<ComboBox Visibility="{Binding Path=ShowOutpatientFields, Converter=
{StaticResource
boolTovisConverter}}" Grid.Row="5" Grid.Column="2" Margin="0,2,0,2"
Text="{Binding Path=NewCase.ServiceType, ValidatesOnDataErrors=true,
NotifyOnValidationError=true}" SelectedValuePath="Tag">
<ComboBox.Items>
<ComboBoxItem Content="Hospice" Tag="33" />
<ComboBoxItem Content="Hospital Outpatient" Tag="36" />
<ComboBoxItem Content="Hospital Inpatient Extension" Tag="128" />
<ComboBoxItem Content="Maternity" Tag="52" />
</ComboBox.Items>
</ComboBox>
If you have this property in your ViewModel class: 如果您在ViewModel类中具有此属性:
private string _serviceType;
public string ServiceType
{
get { return _serviceType; }
set { _serviceType = value; }
}
Of course you can have property of type int and it will be working too. 当然你可以拥有int类型的属性,它也会工作。
Try this binding: 试试这个绑定:
<ComboBox VerticalAlignment="Center" Margin="0,2,0,2"
SelectedValue="{Binding ServiceType}"
SelectedValuePath="Tag">
<ComboBox.Items>
<ComboBoxItem Content="Hospice" Tag="33" />
<ComboBoxItem Content="Hospital Outpatient" Tag="36" />
<ComboBoxItem Content="Hospital Inpatient Extension" Tag="128" />
<ComboBoxItem Content="Maternity" Tag="52" />
</ComboBox.Items>
</ComboBox>
给组合框一个名字“x:Name =”abcComboBox“然后在代码端字符串标签=(abcComboBox.SelectedItem as ComboBoxItem).Tag.ToString();
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