44 lines
1.4 KiB
C#
44 lines
1.4 KiB
C#
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using System.Globalization;
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using System.Windows.Data;
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namespace Sai.Toolkit.Mvvm.Converters;
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public class ComparisonConverter : IValueConverter
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{
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/// <summary>
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/// 模型属性到控件属性
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/// </summary>
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/// <param name="value"></param>
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/// <param name="targetType"></param>
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/// <param name="parameter"></param>
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/// <param name="culture"></param>
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/// <returns></returns>
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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//value:ViewModel属性，枚举/数字/字符串
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//parameter：ConverterParameter，枚举/数字/字符串
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//return (string)parameter == (string)value;
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//绑定的枚举属性与控件转换参数一致则选中
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return value.Equals(parameter);
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//return (string)parameter == (string)value;
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}
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/// <summary>
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/// 控件选中，将Converter参数传给模型属性
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/// </summary>
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/// <param name="value"></param>
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/// <param name="targetType"></param>
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/// <param name="parameter"></param>
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/// <param name="culture"></param>
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/// <returns></returns>
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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{
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//value:bool 比如RadioButton的check属性
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//parameter:ConverterParameter枚举
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//一样才传递给ViewModel
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//选中则返回枚举类
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return value is true ? parameter : Binding.DoNothing;
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//return (bool)value ? parameter : Binding.DoNothing;
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}
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}
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