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■ Binding 태그 확장 : ElementName 속성을 사용해 특정 엘리먼트 속성 바인딩하기

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TestProject.zip


DoubleToDecimalValueConveter.cs

 

 

using System;

using System.Globalization;

using System.Windows.Data;

 

namespace TestProject

{

    /// <summary>

    /// 실수↔10진수 값 변환자

    /// </summary>

    [ValueConversion(typeof(double), typeof(decimal))]

    public class DoubleToDecimalValueConverter : IValueConverter

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method

        ////////////////////////////////////////////////////////////////////////////////////////// Public

 

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

 

        /// <summary>

        /// 변환하기

        /// </summary>

        /// <param name="sourceValue"></param>

        /// <param name="targetType">타겟 타입</param>

        /// <param name="parameter">파라미터</param>

        /// <param name="cultureInfo">CultureInfo</param>

        /// <returns>변환 값</returns>

        public object Convert(object sourceValue, Type targetType, object parameter, CultureInfo cultureInfo)

        {

            decimal targetValue = new decimal((double)sourceValue);

 

            if(parameter != null)

            {

                targetValue = decimal.Round(targetValue, int.Parse(parameter as string));

            }

 

            return targetValue;

        }

 

        #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">파라미터</param>

        /// <param name="cultureInfo">CultureInfo</param>

        /// <returns>역변환 값</returns>

        public object ConvertBack(object sourceValue, Type targetType, object parameter, CultureInfo cultureInfo)

        {

            return decimal.ToDouble((decimal)sourceValue);

        }

 

        #endregion

    }

}

 

 

MainWindow.xaml

 

 

<Window x:Class="TestProject.MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="clr-namespace:TestProject"

    Width="800"

    Height="600"

    Title="Binding 태그 확장 : ElementName 속성을 사용해 특정 엘리먼트 속성 바인딩하기"

    FontFamily="나눔고딕코딩"

    FontSize="16">

    <Window.Resources>

        <local:DoubleToDecimalValueConverter x:Key="DoubleToDecimalValueConverterKey" />

    </Window.Resources>

    <StackPanel

        HorizontalAlignment="Center"

        VerticalAlignment="Center">

        <ScrollBar Name="scrollBar"

            HorizontalAlignment="Center"

            Margin="10"

            Width="500"

            Height="20"

            Orientation="Horizontal"

            Maximum="100"

            SmallChange="1"

            LargeChange="10" />

        <Label

            HorizontalAlignment="Center"

            Margin="10"

            Content="{Binding ElementName=scrollBar,

                Path=Value,

                Mode=OneWay,

                UpdateSourceTrigger=PropertyChanged,

                Converter={StaticResource DoubleToDecimalValueConverterKey},

                ConverterParameter=2}" />

    </StackPanel>

</Window>

 

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Posted by 사용자 icodebroker
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