/// <summary>
/// 获得枚举项的描述信息值，若没有定义该附加属性，则返回空串
/// </summary>
/// <param name="enumItem">枚举项</param>
/// <returns>枚举项的描述信息值，若没有定义该枚举项附加属性，则返回空串</returns>
/// <remarks>获得枚举项的描述信息值，若没有定义该枚举项附加属性，则返回空串
/// <code source="..\Framework\TestProjects\DeluxeWorks.Library.Test\Core\EnumItemDescriptionAttributeTest.cs" region = "GetDescriptionTest" lang="cs" title="得到枚举项的描述信息属性" />
/// </remarks>
public static string GetDescription(System.Enum enumItem)
{
string result = string.Empty;
EnumItemDescriptionAttribute attr = GetAttribute(enumItem);
if (attr != null)
{
result = attr.Description;
}
return(result);
}
private void FillDescriptionAttributeInfo(EnumItemDescriptionAttribute attr)
{
if (attr != null)
{
this.Description = attr.description;
this.ShortName = attr.ShortName;
this.Category = attr.Category;
if (attr.SortId != -1)
{
this.sortId = attr.SortId;
}
}
}
/// <summary>
/// 根据描述找到枚举对象的值
/// </summary>
/// <param name="enumType"></param>
/// <param name="description"></param>
/// <returns></returns>
public static int GetEnumValue(Type enumType, string description)
{
EnumItemDescriptionList enumList = EnumItemDescriptionAttribute.GetDescriptionList(enumType);
EnumItemDescription found = null;
foreach (EnumItemDescription item in enumList)
{
if (item.Description == description)
{
found = item;
break;
}
}
if (found == null)
{
throw new ArgumentException(string.Format("无法在类型为{0}的枚举中找到描述为{1}的枚举对象", enumType.Name, description));
}
return(found.EnumValue);
}
/// <summary>
/// 得到某个枚举项的描述
/// </summary>
/// <param name="enumItem"></param>
/// <returns></returns>
public static string ToDescription(this System.Enum enumItem)
{
enumItem.NullCheck("enumItem");
return(EnumItemDescriptionAttribute.GetDescription(enumItem));
}
/// <summary>
/// 根据值找到枚举对象的描述
/// </summary>
/// <param name="enumType"></param>
/// <param name="value"></param>
/// <returns></returns>
public static string GetEnumDescription(Type enumType, int value)
{
Enum item = (Enum)Enum.ToObject(enumType, value);
return(EnumItemDescriptionAttribute.GetDescription(item));
}