[C#/WPF] IMultiValueConverter 인터페이스 사용하기

■ IMultiValueConverter 인터페이스를 사용하는 방법을 보여준다.

 

▶ 예제 코드 (C#)

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

/// <summary>
/// 특수 기능 변환자
/// </summary>
public class SpecialFeaturesConverter : IMultiValueConverter
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 변환하기 - Convert(sourceValueArray, targetType, parameter, cultureInfo)

    /// <summary>
    /// 변환하기
    /// </summary>
    /// <param name="sourceValueArray">소그 값 배열</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[] sourceValueArray, Type targetType, object parameter, CultureInfo cultureInfo)
    {
        if(sourceValueArray == null || sourceValueArray.Length < 2)
        {
            return false;
        }

        if(sourceValueArray[0] == DependencyProperty.UnsetValue)
        {
            return false;
        }

        if(sourceValueArray[1] == DependencyProperty.UnsetValue)
        {
            return false;
        }

        int      rating = (int)sourceValueArray[0];
        DateTime date   = (DateTime)sourceValueArray[1];

        if((rating >= 10) && (date.Date < (DateTime.Now.Date - new TimeSpan(365, 0, 0, 0))))
        {
            return true;
        }

        return false;
    }

    #endregion
    #region 역변환하기 - ConvertBack(sourceValue, targetTypeArray, parameter, cultureInfo)

    /// <summary>
    /// 역변환하기
    /// </summary>
    /// <param name="sourceValue">소스 값</param>
    /// <param name="targetTypeArray">타겟 타입 배열</param>
    /// <param name="parameter">매개 변수</param>
    /// <param name="cultureInfo">문화 정보</param>
    /// <returns>역변환 값</returns>
    public object[] ConvertBack(object sourceValue, Type[] targetTypeArray, object parameter, CultureInfo cultureInfo) => new[] { Binding.DoNothing, Binding.DoNothing };

    #endregion
}