[C#/MAUI/.NET6] IValueConverter 인터페이스 : 색상→문자열 변환자 사용하기

■ IValueConverter 인터페이스를 구현해 색상→문자열 변환자를 사용하는 방법을 보여준다.

 

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using System.Globalization;

 

/// <summary>
/// 색상→문자열 변환자
/// </summary>
public class ColorToStringConverter : 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)
{
Color color = sourceValue as Color;

 

if(color == null)
{
return null;
}

 

int alpha = (int)Math.Round(255 * color.Alpha);
int red = (int)Math.Round(255 * color.Red );
int green = (int)Math.Round(255 * color.Green);
int blue = (int)Math.Round(255 * color.Blue );

 

return $"{alpha:X2}:{red:X2}:{green:X2}:{blue:X2}";
}

 

#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)
{
}

 

#endregion
}
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