C#EnumExtensionsMethod
這篇介紹在C#上如果寫出Enum的Extensions方法。
enum & Extensions example
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| namespace Test
{
public enum CityInTaiwan
{
Taipei = 0,
NewTaipei = 1,
Taoyuan = 2
}
public static class Extensions
{
public static int getPersonsCount(this CityInTaiwan cityInTaiwan)
{
int personsCount = -1;
switch (cityInTaiwan)
{
case CityInTaiwan.Taipei:
personsCount = 1000000;
return personsCount;
case CityInTaiwan.NewTaipei:
personsCount = 3000000;
return personsCount;
case CityInTaiwan.Taoyuan:
personsCount = 2000000;
return personsCount;
default:
return personsCount;
}
}
}
}
|
呼叫方法
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| CityInTaiwan.Taipei.getPersonsCount(); //Output:1000000
CityInTaiwan.NewTaipei.getPersonsCount(); //Output:3000000
CityInTaiwan.Taoyuan.getPersonsCount(); //Output:2000000
|