/// <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 <EnumDescription> list = EnumDescription.DoGetFieldTexts(enumValue.GetType());
if (list == null)
{
return(null);
}
return(CollectionConverter.ConvertFirstSpecification <EnumDescription, object>(list, delegate(EnumDescription ed) { return ed.Tag; }, delegate(EnumDescription ed) { return ed.enumValue.ToString() == enumValue.ToString(); }));
}
/// <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 <EnumDescription> list = EnumDescription.DoGetFieldTexts(enumType);
if (list == null)
{
return(null);
}
return(CollectionConverter.ConvertFirstSpecification <EnumDescription, object>(list, delegate(EnumDescription des) { return des.enumValue; }, delegate(EnumDescription des) { return des.tag.ToString() == tag.ToString(); }));
}
/// <summary>
/// GetUnion 高效地求两个List元素的并集。
/// </summary>
public static List <T> GetUnion <T>(IList <T> list1, IList <T> list2)
{
SortedDictionary <T, int> result = new SortedDictionary <T, int>();
foreach (T tmp in list1)
{
if (!result.ContainsKey(tmp))
{
result.Add(tmp, 0);
}
}
foreach (T tmp in list2)
{
if (!result.ContainsKey(tmp))
{
result.Add(tmp, 0);
}
}
return((List <T>)CollectionConverter.CopyAllToList <T>(result.Keys));
}
/// <summary>
/// ConvertAll 将source中的每个元素转换为TResult类型
/// </summary>
public static IList <TResult> ConvertAll <TObject, TResult>(IEnumerable <TObject> source, Func <TObject, TResult> converter)
{
return(CollectionConverter.ConvertSpecification <TObject, TResult>(source, converter, null));
}