■ IValueConverter 인터페이스에서 NULLABLE 진리 값↔진리 값 변환자를 사용하는 방법을 보여준다.
▶ NullableBooleanToBooleanConverter.cs
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using System; using Microsoft.UI.Xaml.Data; /// <summary> /// NULL 가능한 불린값↔불린값 변환자 /// </summary> public class NullableBooleanToBooleanConverter : IValueConverter { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 변환하기 - Convert(sourceValue, targetType, parameter, language) /// <summary> /// 변환하기 /// </summary> /// <param name="sourceValue">소스 값</param> /// <param name="targetType">타겟 타입</param> /// <param name="parameter">매개 변수</param> /// <param name="language">언어</param> /// <returns>변환 값</returns> public object Convert(object sourceValue, Type targetType, object parameter, string language) { if(sourceValue is bool?) { return (bool)sourceValue; } return false; } #endregion #region 역변환하기 - ConvertBack(sourceValue, targetType, parameter, language) /// <summary> /// 역변환하기 /// </summary> /// <param name="sourceValue">소스 값</param> /// <param name="targetType">타겟 타입</param> /// <param name="parameter">매개 변수</param> /// <param name="language">언어</param> /// <returns>역변환 값</returns> public object ConvertBack(object sourceValue, Type targetType, object parameter, string language) { if(sourceValue is bool) { return (bool)sourceValue; } return false; } #endregion } |