IValueConverter类 Bingding.Converter
https://www.cnblogs.com/gaoshang212/p/4973300.html?utm_source=tuicool&utm_medium=referral
显示界面上有多个RadioButton,需要选择其中一个来修改一个枚举类型的值。举例:有七个RadioButton,星期一到星期日,选择其中之一可以改变枚举类型week的对应值。
利用Converter和ConevertParamter属性。
1.新加一个类继承自IValueConverter。
class RadioBtConvter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return value == null ? false : value.Equals(parameter); } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { return value != null && value.Equals(true) ? parameter : Binding.DoNothing; } }程序逻辑:Convert(把ConverterParameter转化成Ischeck能用的bool量),如果要使用的转换器参数 == 绑定源的值,返回true;否则返回false;ConvertBack(把Ischeck的bool量转化成枚举类型的week),如果Ischeck的值是true,那么返回枚举,否则执行Binding.DoNothing。(用作返回值以指示绑定引擎不执行任何操作。)
2.把IValueConverter类添加到App.xaml的资源字典中
xmlns:convter="clr-namespace:comboxTest.Untils" <Application.Resources> <convter:RadioBtConvter x:Key="RadioBtConvter"/> </Application.Resources>3.xaml文件中把RadioButton进行Binding
<RadioButton Content="星期一" Margin="5",IsChecked="{Binding week, Mode=TwoWay,Converter={StaticResource RadioBtConvter},ConverterParameter={x:Static local:WeekEnum.Monday}}"/> <TextBox Margin="5" Width="70" Text="{Binding today}"/>4.
private WeekEnum _week; public WeekEnum week { get { return _week; } set { _week = value; switch(this._week) { case WeekEnum.Monday: this.today = "Monday"; break; case WeekEnum.Tuesday: this.today = "Tuesday"; break; case WeekEnum.Wednesday: this.today = "Wednesday"; break; case WeekEnum.Thursday: this.today = "Thursday"; break; case WeekEnum.Friday: this.today = "Friday"; break; case WeekEnum.Saturday: this.today = "Saturday"; break; case WeekEnum.Sunday: this.today = "Sunday"; break; } this.RaisePropertyChanged("week"); } } }源码:https://download.csdn.net/download/ngany/12807299