将单选按钮绑定到枚举属性
本文关键字:枚举 属性 绑定 单选按钮 | 更新日期: 2023-09-27 18:18:57
我想我已经遵循了这篇文章中给出的例子,但是当按钮改变时,我的属性并没有改变。我哪里做错了,有什么建议吗?
枚举和类 的c#代码public enum SystemTypes
{
TypeA,
TypeB
}
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
SystemTypes systemType = SystemTypes.TypeA;
public SystemTypes SystemType
{
get { return systemType; }
set { systemType = value; }
}
}
public class EnumToBooleanConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return value.Equals(parameter);
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return value.Equals(true) ? parameter : Binding.DoNothing;
}
}
xaml
<Canvas>
<Canvas.Resources>
<local:EnumToBooleanConverter x:Key="EnumToBooleanConverter" />
</Canvas.Resources>
<RadioButton x:Name="TypeARadioButton" Content="TypeA" Canvas.Left="10" Canvas.Top="10"
IsChecked="{Binding Path=SystemType, Converter={StaticResource EnumToBooleanConverter}, ConverterParameter={x:Static local:SystemTypes.TypeA}}" />
<RadioButton x:Name="TypeBRadioButton" Content="TypeB" Canvas.Left="10" Canvas.Top="31"
IsChecked="{Binding Path=SystemType, Converter={StaticResource EnumToBooleanConverter}, ConverterParameter={x:Static local:SystemTypes.TypeB}}" />
</Canvas>
您需要将Binding Mode设置为two - way,然后在Converter中实现方法ConvertBack负责将bool转换为SystemType,在SystemType的setter中包括
set { systemType = value; OnPropertyChanged(() => "SystemType");}
以填充其值已更改的属性。
OnPropertyChanged(() => "SystemType")
可以工作,如果你实现接口INotifyPropertyChanged。我不知道你是否设置了DataContext,如果你没有绑定就不工作了。为了纠正这个问题,在InitializeComponent()之后添加
this.DataContext = this;