■ IValueConverter 인터페이스를 구현해 진리 값 반전 변환자를 사용하는 방법을 보여준다.
▶ 예제 코드 (C#)
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using System.Globalization; /// <summary> /// 진리 값 반전 변환자 /// </summary> public class InverseBooleanConverter : IValueConverter { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 변환하기 - Convert(sourceValue, targetType, parameter, cultureInfo) /// <summary> /// 변환하기 /// </summary> /// <param name="sourceValue">소스 값</param> /// <param name="targetType">타겟 타입</param> /// <param name="parameter">매개 변수</param> /// <param name="cultureInfo">문화 정보</param> /// <returns>변환 값</returns> public object Convert(object sourceValue, Type targetType, object parameter, CultureInfo cultureInfo) { if(sourceValue is bool?) { bool? boolNullable = (bool?)sourceValue; return boolNullable.HasValue ? !boolNullable.Value : true; } if(sourceValue.GetType() == typeof(bool)) { return !((bool)sourceValue); } return true; } #endregion #region 역변환하기 - ConvertBack(sourceValue, targetType, parameter, cultureInfo) /// <summary> /// 역변환하기 /// </summary> /// <param name="sourceValue">소스 값</param> /// <param name="targetType">타겟 타입</param> /// <param name="parameter">매개 변수</param> /// <param name="cultureInfo">문화 정보</param> /// <returns>역변환 값</returns> public object ConvertBack(object sourceValue, Type targetType, object parameter, CultureInfo cultureInfo) { if(sourceValue == null) { return true; } if(sourceValue is bool?) { bool? boolNullable = (bool?)sourceValue; return boolNullable.HasValue ? !boolNullable.Value : true; } if(sourceValue.GetType() == typeof(bool)) { return !((bool)sourceValue); } return true; } #endregion } |