WPF转换器用法示例

绑定模式下的转换器：

1、创建转换器

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Windows.Data;
 6 
 7 namespace Mytest
 8 {
 9     /// <summary>
10     /// 将01 02与布尔类型相互转换
11     /// </summary>
12     public class RdbConvertToStr : IValueConverter
13     {
14         public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
15         {
16             if (value != null && !string.IsNullOrEmpty(value.ToString()))
17             {
18                 if (value.ToString() == parameter.ToString())
19                 {
20                     return true;
21                 }
22             }
23             return false;
24         }
25 
26         public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
27         {
28             if (value != null)
29             {
30                 if ((bool)value)
31                 {
32                     return parameter.ToString();
33                 }
34             }
35             return "";
36         }
37     }
38 
39     /// <summary>
40     /// 将01 02 转为是否可见
41     /// </summary>
42     public class RdbConvertToVisiable : IValueConverter
43     {
44         public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
45         {
46             if (value != null && !string.IsNullOrEmpty(value.ToString()))
47             {
48                 if (value.ToString() == "01")
49                     return "Visiable";
50                 else
51                     return "Collapsed";
52             }
53             return "Collapsed";
54         }
55 
56 
57 
58         public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
59         {
60             if (value != null)
61             {
62                 if (value.ToString() == "Visiable")
63                 {
64                     return "01";
65                 }
66                 else
67                     return "02";
68             }
69             return "";
70         }
71     }
72 }

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}}"