WPF Convertor简单应用

实现RadioButton的IsChecked属性的绑定：

新建一个Convertor类，实现IValueConverter接口：

 

/// <summary>
    /// 连接线动作类型转换器
    /// </summary>
    //[ValueConversion(typeof(int), typeof(bool))]
    public class ActivityLinkActionTypeConvertor : IValueConverter
    {
        #region IValueConverter Members
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            bool reValue = false;
            if (int.Parse(value.ToString()) == int.Parse(parameter.ToString()))
            {
                reValue = true;
            }
            return reValue;
        }
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return int.Parse(parameter.ToString());
        }
        #endregion
    }

 
在xaml文件中引用这个convertor：

 

 

<UserControl.Resources>
    <local:ActivityLinkActionTypeConvertor x:Key="ActivityLinkActionTypeConvertor" />
</UserControl.Resources>

 

 

使用这个convertor：

 

<RadioButton x:Name="NormalRadioButton" Margin="2,2,2,2" GroupName="ActionType" Content="正常处理" Grid.Row="0"
                             IsChecked="{Binding Path=ActionType, Converter={StaticResource ActivityLinkActionTypeConvertor},ConverterParameter=0}" />
<RadioButton x:Name="ExceptionRadioButton" Margin="2,2,2,2" GroupName="ActionType" Content="异常路径（如：拒绝并结束流程）" Grid.Row="1"
                             IsChecked="{Binding Path=ActionType, Converter={StaticResource ActivityLinkActionTypeConvertor},ConverterParameter=1}" />
<RadioButton x:Name="SystemRadioButton" Margin="2,2,2,2" GroupName="ActionType" Content="系统动作（处理人不可见）" Grid.Row="2"
                             IsChecked="{Binding Path=ActionType, Converter={StaticResource ActivityLinkActionTypeConvertor},ConverterParameter=2}" />

 

 

 

Convertor的作用的好处是不用说的，更多应用需依据实际情况来挖掘。