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Category  Languages, WPF
Writer 김태우 Date 2013-08-06 12:16:38 Visit 1633
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

<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    

<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();
        }
    }

 

 

 

 

Tags  Binding Converter, IValueConverter, ResourceDictio
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[Languages-WPF] Binding Converter : IValueConverter (2013-08-06 12:16:38)
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