本文整理匯總了C#中System.Enum.IsDefined方法的典型用法代碼示例。如果您正苦於以下問題：C# Enum.IsDefined方法的具體用法？C# Enum.IsDefined怎麽用？C# Enum.IsDefined使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Enum的用法示例。
在下文中一共展示了Enum.IsDefined方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: Main
//引入命名空間
using System;
[Flags] public enum PetType
{
None = 0, Dog = 1, Cat = 2, Rodent = 4, Bird = 8, Reptile = 16, Other = 32
};
public class Example
{
public static void Main()
{
object value;
// Call IsDefined with underlying integral value of member.
value = 1;
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
// Call IsDefined with invalid underlying integral value.
value = 64;
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
// Call IsDefined with string containing member name.
value = "Rodent";
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
// Call IsDefined with a variable of type PetType.
value = PetType.Dog;
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
value = PetType.Dog | PetType.Cat;
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
// Call IsDefined with uppercase member name.
value = "None";
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
value = "NONE";
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
// Call IsDefined with combined value
value = PetType.Dog | PetType.Bird;
Console.WriteLine("{0:D}: {1}", value, Enum.IsDefined(typeof(PetType), value));
value = value.ToString();
Console.WriteLine("{0:D}: {1}", value, Enum.IsDefined(typeof(PetType), value));
}
}輸出：
1: True 64: False Rodent: True Dog: True Dog, Cat: False None: True NONE: False 9: False Dog, Bird: False
示例2: Main
//引入命名空間
using System;
[Flags] public enum Pets {
None = 0, Dog = 1, Cat = 2, Bird = 4,
Rodent = 8, Other = 16 };
public class Example
{
public static void Main()
{
Pets value = Pets.Dog | Pets.Cat;
Console.WriteLine("{0:D} Exists: {1}",
value, Pets.IsDefined(typeof(Pets), value));
string name = value.ToString();
Console.WriteLine("{0} Exists: {1}",
name, Pets.IsDefined(typeof(Pets), name));
}
}輸出：
3 Exists: False Dog, Cat Exists: False
示例3: Main
//引入命名空間
using System;
enum Color
{
red,
green,
yellow
}
public class MainClass
{
public static void Main()
{
bool defined = Enum.IsDefined(typeof(Color), 5);
Console.WriteLine("5 is a defined value for Color: {0}", defined);
}
}