WPF绑定ComboBox到枚举（有一个扭曲） [英] WPF binding ComboBox to enum (with a twist)

问题描述

问题是我有这个枚举，但是我不想让组合框显示枚举的值。这是枚举：

 公开枚举模式
 {
 [说明（仅显示有效） ] 
活动，
 [描述（仅限显示选择）] 
已选择，
 [描述（显示活动和选定）] 
 ActiveAndSelected 
} 
  

所以在ComboBox中，而不是显示Active，Selected或ActiveAndSelected，我想显示DescriptionProperty对于枚举的每个值。我有一个名为GetDescription（）的枚举扩展方法：

  public static string GetDescription（this Enum enumObj）
 {
 FieldInfo fieldInfo = 
 enumObj.GetType（）。GetField（enumObj.ToString（））; 
 
 object [] attribArray = fieldInfo.GetCustomAttributes（false）; 
 
 if（attribArray.Length == 0）
 {
 return enumObj.ToString（）; 
} 
 else 
 {
 DescriptionAttribute attrib = 
 attribArray [0] as DescriptionAttribute; 
 return attrib.Description; 
} 
} 
  

所以有一种方法可以将枚举绑定到ComboBox AND显示它的GetDescription扩展方法的内容？

谢谢！

解决方案

我喜欢你的想法。但是GetCustomAttributes使用反射。你要做什么表现？

查看这篇文章：
WPF - 在ComboBox控件中显示枚举
http://www.infosysblogs.com/microsoft/2008/09/wpf_displaying_enums_in_combob.html

Well the problem is that I have this enum, BUT I don't want the combobox to show the values of the enum. This is the enum:

public enum Mode
    {
        [Description("Display active only")]
        Active,
        [Description("Display selected only")]
        Selected,
        [Description("Display active and selected")]
        ActiveAndSelected
    }

So in the ComboBox instead of displaying Active, Selected or ActiveAndSelected, I want to display the DescriptionProperty for each value of the enum. I do have an extension method called GetDescription() for the enum:

public static string GetDescription(this Enum enumObj)
        {
            FieldInfo fieldInfo =
                enumObj.GetType().GetField(enumObj.ToString());

            object[] attribArray = fieldInfo.GetCustomAttributes(false);

            if (attribArray.Length == 0)
            {
                return enumObj.ToString();
            }
            else
            {
                DescriptionAttribute attrib =
                    attribArray[0] as DescriptionAttribute;
                return attrib.Description;
            }
        }

So is there a way I can bind the enum to the ComboBox AND show it's content with the GetDescription extension method?

Thanks!

解决方案

I like the way you think. But GetCustomAttributes uses reflection. What is that going to do to your performance?

Check out this post: WPF - Displaying enums in ComboBox control http://www.infosysblogs.com/microsoft/2008/09/wpf_displaying_enums_in_combob.html

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