/// <summary>
/// 获取枚举值的描述文本。
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static string GetDescriptionByValue <T>(Object value) where T : struct
{
Type enumType = typeof(T);
IList <EnumDescriptionAttribute> descriptions = GetDescriptions(enumType);
EnumDescriptionAttribute description = descriptions.First(e => string.Equals(e.EnumValue.ToString(), value.ToString()));
return(description.Description);
}
/// <summary>
/// GetEnumValueByTag 根据描述Tag获取对应的枚举值
/// </summary>
public static object GetEnumValueByTag(Type enumType, object tag)
{
IList <EnumDescriptionAttribute> list = EnumDescriptionAttribute.GetDescriptions(enumType);
if (list == null)
{
return(null);
}
return(list.ConvertFirst <EnumDescriptionAttribute, object>(ed => ed.enumValue, ed => string.Equals(ed.Tag.ToString(), tag.ToString())));
}
/// <summary>
/// GetFieldTag 获得指定枚举值的Tag。
/// </summary>
/// <param name="enumValue"></param>
/// <returns></returns>
public static object GetFieldTag(object enumValue)
{
IList <EnumDescriptionAttribute> list = EnumDescriptionAttribute.GetDescriptions(enumValue.GetType());
if (list == null)
{
return(null);
}
return(list.ConvertFirst <EnumDescriptionAttribute, object>(ed => ed.Tag, ed => string.Equals(ed.EnumValue.ToString(), enumValue.ToString())));
}
/// <summary>
/// GetFieldDescriptionText 获得指定枚举值的描述文本。
/// </summary>
public static string GetFieldText(object enumValue)
{
IList <EnumDescriptionAttribute> list = EnumDescriptionAttribute.GetDescriptions(enumValue.GetType());
if (list == null)
{
return(null);
}
list.ToArray();
return(list.ConvertFirst <EnumDescriptionAttribute, string>(ed => ed.Description, ed => string.Equals(ed.EnumValue.ToString(), enumValue.ToString())));
}
/// <summary>
/// DoGetFieldTexts 得到枚举类型定义的所有枚举值的描述文本
/// </summary>
private static IList <EnumDescriptionAttribute> GetDescriptions(Type enumType)
{
if (!EnumDescriptionAttribute.EnumDescriptionCache.ContainsKey(enumType.FullName))
{
FieldInfo[] fields = enumType.GetFields();
IList <EnumDescriptionAttribute> list = new List <EnumDescriptionAttribute>();
foreach (FieldInfo fi in fields)
{
object[] eds = fi.GetCustomAttributes(typeof(EnumDescriptionAttribute), false);
if (eds.Length == 1)
{
EnumDescriptionAttribute enumDescription = (EnumDescriptionAttribute)eds[0];
enumDescription.enumValue = fi.GetValue(null);
list.Add(enumDescription);
}
}
EnumDescriptionAttribute.EnumDescriptionCache.Add(enumType.FullName, list);
}
return(EnumDescriptionAttribute.EnumDescriptionCache[enumType.FullName]);
}
public static T GetEnumValueByDescription <T>(string description)
{
IList <EnumDescriptionAttribute> list = EnumDescriptionAttribute.GetDescriptions(typeof(T));
return((T)list.First(ed => string.Equals(ed.Description, description)).EnumValue);
}
