使枚举类型的选项在VS的属性窗里显示为中文
我们自己做的组件，一般希望它的属性在设计时能够在属性窗里显示为中文，可以在属性上添加System.ComponentModel.DisplayNameAttribute标注达到这个目的。但是，枚举的选项如何以中文的形式显示在属性窗里呢？
假设我们有如下枚举：
1: public enum MyEnum 2: { 3: A, 4: B 5: }在某个组件里有一个MyEnum类型的属性，如下：
1: [DisplayName("我的枚举")] 2: public MyEnum MyEnum 3: { 4: get;set; 5: }在设计时把这个组件拖到设计器中，发现属性窗中出现了“我的枚举”这个属性，但选项是A和B，如何让它们示为“选项一”和“选项二”呢？这就需要利用到TypeConverter了，因为PropertyGrid利用TypeConverter来显示枚举的选项的。另外，为了使扩展性更好，我们还需要DescriptionAttribute.
继承System.ComponentModel.EnumConverter，实现自己的Converter，如下：
1: public class MyEnumConverter : EnumConverter 2: { 3: private IDictionary<object, string> dic; 4: private IDictionary<string, object> dic2; 5: private readonly Type type = typeof(MyEnum); 6: 7: public MyEnumConverter() 8: : base(typeof(MyEnum)) 9: { 10: } 11: 12: 13: public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) 14: { 15: if(value is string) 16: { 17: if(dic2 != null && dic2.ContainsKey(value as string)) 18: { 19: return dic2[value as string]; 20: } 21: } 22: return base.ConvertFrom(context, culture, value); 23: } 24: 25: public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) 26: { 27: if(destinationType == typeof(string)) 28: { 29: if(dic == null) 30: { 31: dic = new Dictionary<object, string>(); 32: dic2 = new Dictionary<string, object>(); 33: Type reflectionType = TypeDescriptor.GetReflectionType(this.type); 34: if (reflectionType == null) 35: { 36: reflectionType = this.type; 37: } 38: FieldInfo[] fields = reflectionType.GetFields(BindingFlags.Public | BindingFlags.Static); 39: ArrayList list = null; 40: if ((fields != null) && (fields.Length > 0)) 41: { 42: list = new ArrayList(fields.Length); 43: } 44: if (list != null) 45: { 46: foreach (FieldInfo info in fields) 47: { 48: object fieldValue = info.GetValue(info); 49: string desc = fieldValue.ToString(); 50: DescriptionAttribute descriptionAttribute = null; 51: foreach (DescriptionAttribute a in info.GetCustomAttributes(typeof(DescriptionAttribute), false)) 52: { 53: descriptionAttribute = a; 54: break; 55: } 56: if (descriptionAttribute != null) 57: { 58: desc = descriptionAttribute.Description; 59: } 60: dic[fieldValue] = desc; 61: dic2[desc] = fieldValue; 62: } 63: } 64: } 65: return dic[value]; 66: } 67: 68: return base.ConvertTo(context, culture, value, destinationType); 69: } 70: }然后修改MyEnum，如下：
1: public enum MyEnum 2: { 3: [Description("选项一")] 4: A, 5: [Description("选项二")] 6: B 7: }并且修改组件里的属性，加入TypeConverterAttribute，如下：
1: [DisplayName("我的枚举")] 2: [TypeConverter(typeof(MyEnumConverter))] 3: public MyEnum MyEnum 4: { 5: get; 6: set; 7: }这样，就可以以中文的形式在属性窗里显示枚举的选项了，如下图：
image
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原始发表：2010-06-12 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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