49 lines
1.6 KiB
C#
49 lines
1.6 KiB
C#
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public class EnumDescriptionConvert : Collection<String>, IValueConverter
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{
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private Type type;
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private IDictionary<Object, Object> valueToNameMap;
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private IDictionary<Object, Object> nameToValueMap;
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public Type Type
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{
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get { return this.type; }
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set
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{
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if (!value.IsEnum)
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throw new ArgumentException("类型不是枚举类", "value");
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this.type = value;
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Initialize();
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}
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}
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public Object Convert(Object value, Type targetType, Object parameter, CultureInfo culture)
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{
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return this.valueToNameMap[value];
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}
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public Object ConvertBack(Object value, Type targetType, Object parameter, CultureInfo culture)
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{
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return this.nameToValueMap[value];
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}
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private void Initialize()
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{
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this.valueToNameMap = this.type
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.GetFields(BindingFlags.Static | BindingFlags.Public)
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.ToDictionary(fi => fi.GetValue(null), GetDescription);
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this.nameToValueMap = this.valueToNameMap
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.ToDictionary(kvp => kvp.Value, kvp => kvp.Key);
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Clear();
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foreach (String name in this.nameToValueMap.Keys)
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Add(name);
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}
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private static Object GetDescription(FieldInfo fieldInfo)
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{
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var descriptionAttribute =
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(DescriptionAttribute)Attribute.GetCustomAttribute(fieldInfo, typeof(DescriptionAttribute));
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return descriptionAttribute != null ? descriptionAttribute.Description : fieldInfo.Name;
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}
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}
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