方法,该方法接受多个枚举类型
本文关键字:方法 枚举 类型 | 更新日期: 2023-09-27 18:09:30
我有一个包含3种枚举类型的类
我想要一个方法,可以将所有3个枚举作为参数,并获得枚举的整数值。
public enum Enum1
{
Fire = 0,
Hour_24 = 1,
Key_Switch = 2,
Follower = 3,
Entry_Delay1 = 4,
Entry_Delay2 = 5,
Intertior = 6,
Local_Only = 7,
}
public enum Enum2
{
Faulted = 0,
Tampered = 1,
Trouble = 2,
Bypassed = 3,
Inhibited = 4,
Low_Battery = 5,
Loss_Supervision = 6,
Reserved,
Alarm_Memory = 8,
Bypass_Memory = 9
}
private void BuildMessage ()
{
List<Enum1> Enum1List = new List<Enum1>();
FillBits(Enum1List); // => Here I get an error.
}
// This method should accept Enum1 and Enum2
private Byte[] FillBits(List<Enum> EnumList)
{
foreach (Enum e in EnumList)
{
int value = Convert.ToInt32(e);
}
}
我怎样才能做到这一点?
感谢
只需使用泛型:
private Byte[] FillBits<T>(List<T> EnumList)
where T : struct, IConvertible
{
if (!typeof(T).IsEnum)
{
throw new ArgumentException("T must be an enumerated type");
}
foreach (var e in EnumList)
{
int value = Convert.ToInt32(e);
}
}
关于将泛型和枚举一起使用,请参阅此问题:
创建将T约束为枚举的泛型方法
既然枚举已经有一个int值,为什么不直接将其强制转换为int呢?
也许可以尝试使用对象?
private void BuildMessage()
{
var enum1List = new List<object>();
FillBits(enum1List); // => Here I get an error.
}
// This method should accept Enum1 and Enum2
private Byte[] FillBits(IEnumerable<object> enumList)
{
foreach (Enum e in enumList)
{
int value = Convert.ToInt32(e);
}
}
这应该可以工作(没有检查或添加任何内容,只有基本功能(:
private void BuildMessage()
{
List<Enum1> Enum1List = new List<Enum1>();
Enum1List.Add(Enum1.Fire);
Enum1List.Add(Enum1.Follower);
FillBits(Enum1List);
}
private Byte[] FillBits<T>(List<T> enumList)
{
foreach (var e in enumList)
{
int value = Convert.ToInt32(e);
}
}
private Byte[] FillBits<T>(List<T> EnumList) where T: struct, IConvertable
{
foreach (Enum e in EnumList)
{
int value = Convert.ToInt32(e);
}
}
因为不能用枚举继承,所以无法真正确保函数只能在编译级别用List<Enum1>
、List<Enum2>
或List<Enum3>
调用。你有两个真正的替代
1( 运行时类型检查
private Byte[] FillBits<T>(List<T> EnumList) Where T:struct, IConvertable
{
if (typeof(T) != typeof(Enum1) &&
typeof(T) != typeof(Enum2) &&
typeof(T) != typeof(Enum3)) {
throw new <EXCEPTION OF YOUR CHOICE!>;
}
foreach (Enum e in EnumList)
{
int value = Convert.ToInt32(e);
}
}
或者将FillBits<T>
移到基类中,这样就不能直接调用它并提供受保护的重载。
private Byte[] PrivateFillBits<T>(List<T> EnumList) where T: struct, IConvertable
{ ... }
protected Byte[] FillBits(List<Enum1> EnumList) {
return this.PrivateFillBits(EnumList);
}
protected Byte[] FillBits(List<Enum2> EnumList) {
return this.PrivateFillBits(EnumList);
}
protected Byte[] FillBits(List<Enum3> EnumList) {
return this.PrivateFillBits(EnumList);
}