c# - 如何读取枚举的文本值

Question

我创建了一个枚举并想从中读取文本值。枚举如下:

public enum MethodID
{
    /// <summary>
    /// The type of request being done. Inquiry.
    /// </summary>
    [EnumTextValue("01")]
    Inquiry,

    /// <summary>
    /// The type of request being done. Update
    /// </summary>
    [EnumTextValue("02")]
    Update,
}  

现在我想把枚举的值赋给一个请求对象methodID。我尝试了以下代码，但没有成功:

request.ID = Enum.GetName(typeof(MethodID), MethodID.Inquiry);  

我想要的是将值“01”分配给我将从 Enum MethodID 获取的请求数据协定 (request.ID) 的数据成员。我将如何得到这个？请帮忙

Answer 1

如果你只想获取 int 值，那么你可以将枚举声明为

public enum MethodID
{
    [EnumTextValue("01")]
    Inquiry = 1,

    [EnumTextValue("02")]
    Update = 2,
}

然后使用转换为 int:

ind id = (int)MethodID.Inquiry;

如果你想从属性中获取字符串值那么这是静态辅助方法

///<summary>
/// Allows the discovery of an enumeration text value based on the <c>EnumTextValueAttribute</c>
///</summary>
/// <param name="e">The enum to get the reader friendly text value for.</param>
/// <returns><see cref="System.String"/> </returns>
public static string GetEnumTextValue(Enum e)
{
    string ret = "";
    Type t = e.GetType();
    MemberInfo[] members = t.GetMember(e.ToString());
    if (members.Length == 1)
    {
        object[] attrs = members[0].GetCustomAttributes(typeof (EnumTextValueAttribute), false);
        if (attrs.Length == 1)
        {
            ret = ((EnumTextValueAttribute)attrs[0]).Text;
        }
    }
    return ret;
}