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	IP Address	216.73.216.184

2025. 06

Category	Languages, WPF
Writer	김태우	Date	2013-08-06 12:16:38	Visit	4040
Binding Converter : IValueConverter

Binding Converter : IValueConverter

데이터 바인딩에서 바인딩 값을 변환하기 위하여 사용

1. 기본적인 사용

[ xmal ]

NameSpace정의 - xmal 최상위 태그에 정의

xmlns:src="clr-namespace:ProjectTest.Converters"

Resources에 정의

1	`<src:DateConverter` `x:Key="dateConverter"/>`

xmal에서 converter 사용

<TextBlock Grid.Row="2" Grid.Column="0" Margin="0,0,8,0"
           Name="startDateTitle"
           Style="{StaticResource smallTitleStyle}">Start Date:</TextBlock>
<TextBlock Name="StartDateDTKey" Grid.Row="2" Grid.Column="1"
    Text="{Binding Path=StartDate, Converter={StaticResource dateConverter}}"
    Style="{StaticResource textStyleTextBlock}"/>

[ cs ]

public class DateConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        DateTime date = (DateTime)value;
        return date.ToShortDateString();
    }
     
    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        string strValue = value as string;
        DateTime resultDateTime;
        if (DateTime.TryParse(strValue, out resultDateTime))
        {
            return resultDateTime;
        }
        return DependencyProperty.UnsetValue;
    }
}

2. Style Converter

[ xmal ]

NameSpace정의 - xmal 최상위 태그에 정의

xmlns:Converters="clr-namespace:ProjectTest.Converters"

Resources에 정의 - 예) UserControl

<UserControl.Resources>
    <Converters:StyleConverter x:Key="StyleConverter" />
</UserControl.Resources>

xmal에서 converter 사용

1	`<Control` `Style="{Binding Path=shape, Converter={StaticResource StyleConverter}, ConverterParameter=DogStyle}"` `Width="80"` `Height="80"/>`

[ cs ]

public class StyleConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        ResourceDictionary dic = Application.Current.Resources;
 
        Style returnStyle = new Style();
 
        switch (parameter.ToString())
        {
            case "DogStyle":
                if ((String)value == "dog")
                {
                    returnStyle = dic["dog1"] as Style;
                }
                else
                {
                    returnStyle = dic["dog2"] as Style;
                }
                break;
            case "CatStyle":
                switch ((String)value)
                {
                    case "YellowCat":
                        returnStyle = dic["YCat"] as Style;
                        break;
                    case "RedCat":
                        returnStyle = dic["RCat"] as Style;
                        break;
                    default:
                        break;
                }
                break;
        }
        return returnStyle;
    }
 
    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

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