/// <summary>
/// 获取枚举内容项，并以KeyValuePair列表的方式返回；其中，Key=枚举的值，Value=枚举的描述
/// </summary>
/// <typeparam name="TEnum">枚举类型</typeparam>
/// <param name="appendType">选择是否在列表项前插入一条选项的选项类型，比如是否插入所有|请选择等Key为Null的选项</param>
/// <param name="customApplyDesc">如果要在列表项前插入一条选项，该选项的自定义描述</param>
/// <returns></returns>
public static List <KeyValuePair <Nullable <TEnum>, string> > GetKeyValuePairs <TEnum>(EnumAppendItemType appendType, params string[] customApplyDesc) where TEnum : struct
{
List <KeyValuePair <Nullable <TEnum>, string> > keyValuePairList = new List <KeyValuePair <Nullable <TEnum>, string> >();
Type enumType = typeof(TEnum);
if (enumType.IsEnum || IsGenericEnum(enumType))
{
Dictionary <TEnum, string> dic = EnumHelper.GetDescriptions <TEnum>();
if (dic != null && dic.Count > 0)
{
foreach (TEnum e in dic.Keys)
{
keyValuePairList.Add(new KeyValuePair <Nullable <TEnum>, string>(e, dic[e]));
}
}
if (appendType != EnumAppendItemType.None)
{
if (customApplyDesc != null && customApplyDesc.Length > 0 && !string.IsNullOrEmpty(customApplyDesc[0]))
{
KeyValuePair <Nullable <TEnum>, string> kv = new KeyValuePair <Nullable <TEnum>, string>(null, customApplyDesc[0]);
keyValuePairList.Insert(0, kv);
}
else
{
string desc = GetEnumDescription(appendType);
if (!string.IsNullOrEmpty(desc))
{
KeyValuePair <Nullable <TEnum>, string> kv = new KeyValuePair <Nullable <TEnum>, string>(null, desc);
keyValuePairList.Insert(0, kv);
}
}
}
}
return(keyValuePairList);
}
/// <summary>
/// 将枚举值转换成KeyValuePair<Nullable<TEnum>, string>列表返回,
/// value是通过枚举类型的DescriptionAttribute指定资源类名（如果没有通过DescriptionAttribute指定资源，则默认以"ECCentral.BizEntity.Resources.ResCommonEnum"为资源类）,
/// 从而取得每个枚举值（在资源中以"[枚举类型]_[枚举值字段名称]"为Key）的描述;
/// </summary>>
/// <typeparam name="TEnum">枚举类型</typeparam>
/// <param name="appendType">是否插入“所有”项，且插入到第一个位置,“所有”项的Key值为null。</param>
/// <returns></returns>
public static List <KeyValuePair <Nullable <TEnum>, string> > GetKeyValuePairs <TEnum>(EnumAppendItemType appendType) where TEnum : struct
{
List <KeyValuePair <Nullable <TEnum>, string> > keyValuePairList = new List <KeyValuePair <Nullable <TEnum>, string> >();
Type enumType = typeof(TEnum);
if (enumType.IsEnum)
{
FieldInfo[] fields = enumType.GetFields(BindingFlags.Public | BindingFlags.Static);
global::System.Resources.ResourceManager resourceManager = GetResourceManager(enumType);
string description = null;
foreach (FieldInfo field in fields)
{
description = null;
string resKey = string.Format("{0}_{1}", enumType.Name, field.Name);
description = GetResourceString(resourceManager, resKey);
//if (description == null)
//{
// object[] attrs = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
// if (attrs != null && attrs.Length > 0)
// {
// DescriptionAttribute desc = attrs[0] as DescriptionAttribute;
// description = desc.Description;
// }
//}
description = description ?? field.Name;
object enumValue = field.GetValue(null);
object[] ObsoleteAttrs = field.GetCustomAttributes(typeof(ObsoleteAttribute), true);
if (ObsoleteAttrs.Length <= 0)
{
keyValuePairList.Add(new KeyValuePair <Nullable <TEnum>, string>((TEnum)enumValue, description));
}
}
if (appendType != EnumAppendItemType.None)
{
description = null;
string key_CustomSelect = String.Format("{0}__Select", enumType.Name);
switch (appendType)
{
case EnumAppendItemType.All:
description = ResCommonEnum.Enum_All;
break;
case EnumAppendItemType.Select:
description = ResCommonEnum.Enum_Select;
break;
case EnumAppendItemType.Custom_All:
description = GetResourceString(resourceManager, enumType.Name) ?? ResCommonEnum.Enum_All;
break;
case EnumAppendItemType.Custom_Select:
description = GetResourceString(resourceManager, key_CustomSelect) ?? ResCommonEnum.Enum_Select;
break;
}
keyValuePairList.Insert(0, new KeyValuePair <Nullable <TEnum>, string>(null, description));
}
}
return(keyValuePairList);
}
