WPF转换器用法示例

绑定模式下的转换器：

1、创建转换器

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;

namespace Mytest
{
    /// <summary>
    /// 将01 02与布尔类型相互转换
    /// </summary>
    public class RdbConvertToStr : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value != null && !string.IsNullOrEmpty(value.ToString()))
            {
                if (value.ToString() == parameter.ToString())
                {
                    return true;
                }
            }
            return false;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value != null)
            {
                if ((bool)value)
                {
                    return parameter.ToString();
                }
            }
            return "";
        }
    }

    /// <summary>
    /// 将01 02 转为是否可见
    /// </summary>
    public class RdbConvertToVisiable : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value != null && !string.IsNullOrEmpty(value.ToString()))
            {
                if (value.ToString() == "01")
                    return "Visiable";
                else
                    return "Collapsed";
            }
            return "Collapsed";
        }



        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value != null)
            {
                if (value.ToString() == "Visiable")
                {
                    return "01";
                }
                else
                    return "02";
            }
            return "";
        }
    }
}

2、在使用页面添加转换器引用

 xmlns:convert="clr-namespace:Mytest.Converter"

3、对使用的转换器进行命名

<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Mytest;component/Index.xaml"/>
</ResourceDictionary.MergedDictionaries>
<convert:RdbConvertToVisiable x:Key="rdbConvert"/>
</ResourceDictionary>
</UserControl.Resources>

4、绑定转换器

 Visibility="{Binding MyEntity.TestEntity.G000000B,Converter={StaticResource rdbConvert}}"