c#枚举enum用法

转载：https://www.cnblogs.com/eliauk-L/p/16185682.html

1.定义枚举类型

 public enum Test
 {
 　　男 = 0,
 　　女 = 1
 }

 public enum Test { 　　男, 　　女 }

2.获取枚举值ublic void EnumsAction()

public void EnumsAction()
{
    var s = Test.男;//男
    var s2 = (int)Test.男;//0

    var a = Test.男.ToString();//"男"

    var r = (Test)1;//女

    var x = (Test)Enum.Parse(typeof(Test), "男");//男
    var x2 = Enum.Parse(typeof(Test), "男");//男
    var x3 = Enum.GetName(typeof(Test), 0);//"男"

    foreach (var item in Enum.GetValues(typeof(Test)))
    {
        var v = item;//男[女]
        var v2 = (int)item;//0[1]
        var t = item.GetType();//{Name = "Test" FullName = "BaseControl.Enum.Test"}
        var g = item.ToString();//"男"["女"]
    }
}

3.Enum Helper的使用

public static class EnumHelper
{
    /// <summary>
    /// 根据枚举的值获取枚举名称
    /// </summary>
    /// <typeparam name="T">枚举类型</typeparam>
    /// <param name="status">枚举的值</param>
    /// <returns></returns>
    public static string GetEnumName<T>(this int status)
    {
        return Enum.GetName(typeof(T), status);
    }
    /// <summary>
    /// 获取枚举名称集合
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public static string[] GetNamesArr<T>()
    {
        return Enum.GetNames(typeof(T));
    }
    /// <summary>
    /// 将枚举转换成字典集合
    /// </summary>
    /// <typeparam name="T">枚举类型</typeparam>
    /// <returns></returns>
    public static Dictionary<string, int> getEnumDic<T>()
    {

        Dictionary<string, int> resultList = new Dictionary<string, int>();
        Type type = typeof(T);
        var strList = GetNamesArr<T>().ToList();
        foreach (string key in strList)
        {
            string val = Enum.Format(type, Enum.Parse(type, key), "d");
            resultList.Add(key, int.Parse(val));
        }
        return resultList;
    }
    /// <summary>
    /// 将枚举转换成字典
    /// </summary>
    /// <typeparam name="TEnum"></typeparam>
    /// <returns></returns>
    public static Dictionary<string, int> GetDic<TEnum>()
    {
        Dictionary<string, int> dic = new Dictionary<string, int>();
        Type t = typeof(TEnum);
        var arr = Enum.GetValues(t);
        foreach (var item in arr)
        {
            dic.Add(item.ToString(), (int)item);
        }

        return dic;
    }

    ///获取description信息
    public static string GetDescription(Enum value)
    {
        if (value == null)
        {
            throw new ArgumentException("value");
        }
        string description = value.ToString();
        var fieldInfo = value.GetType().GetField(description);
        var attributes =
            (EnumDescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(EnumDescriptionAttribute), false);
        if (attributes != null && attributes.Length > 0)
        {
            description = attributes[0].Description;
        }
        return description;
    }

    public static string GetEnumDescription2(Enum enumValue)
    {
        var field = enumValue.GetType().GetField(enumValue.ToString());
        var objs = field.GetCustomAttribute(typeof(DescriptionAttribute));
        var descriptionAttribute = (DescriptionAttribute)objs;
        return descriptionAttribute.Description;
    }

}