转-C#让枚举返回字符串

下面的手段是使用给枚举项打标签的方式,来返回字符串

下面分别定义一个属性类,和一个枚举帮助类

[AttributeUsage(AttributeTargets.Field,AllowMultiple = false)]
public sealed class EnumDescriptionAttribute : Attribute
{
    private string description;
    public string Description { get { return description; } }

    public EnumDescriptionAttribute(string description)
        : base()
    {
        this.description = description;
    }
}

public static class EnumHelper
{
    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;
    }
}

使用举例:

enum Week
{
    [EnumDescription("星期一")]
    Monday,
    [EnumDescription("星期二")]
    Tuesday
}

//下面打印结果为: 星期一
Console.WriteLine(EnuHelper.GetDescription(Week.Monday))