我正在使用这段代码将int转换为枚举：

if (typeof(YourEnum).IsEnumDefined(valueToCast)) return (YourEnum)valueToCast;
else { //handle it here, if its not defined }

我觉得这是最好的解决方案。

我需要两个指示：

YourEnum possibleEnum = (YourEnum)value; // There isn't any guarantee that it is part of the enum
if (Enum.IsDefined(typeof(YourEnum), possibleEnum))
{
    // Value exists in YourEnum
}

从int：

YourEnum foo = (YourEnum)yourInt;

从字符串：

YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);

// The foo.ToString().Contains(",") check is necessary for 
// enumerations marked with a [Flags] attribute.
if (!Enum.IsDefined(typeof(YourEnum), foo) && !foo.ToString().Contains(","))
{
    throw new InvalidOperationException(
        $"{yourString} is not an underlying value of the YourEnum enumeration."
    );
}

从一个数字：

YourEnum foo = (YourEnum)Enum.ToObject(typeof(YourEnum), yourInt);

如果您已经准备好使用4.0.NETFramework，那么有一个新的Enum.TryParse（）函数非常有用，并且可以很好地使用[Flags]属性。请参阅Enum.TryParse方法（字符串，TEnum%）

向Enum转换和从Enum转换的不同方式

enum orientation : byte
{
 north = 1,
 south = 2,
 east = 3,
 west = 4
}

class Program
{
  static void Main(string[] args)
  {
    orientation myDirection = orientation.north;
    Console.WriteLine(“myDirection = {0}”, myDirection); //output myDirection =north
    Console.WriteLine((byte)myDirection); //output 1

    string strDir = Convert.ToString(myDirection);
        Console.WriteLine(strDir); //output north

    string myString = “north”; //to convert string to Enum
    myDirection = (orientation)Enum.Parse(typeof(orientation),myString);


 }
}

以以下示例为例：

int one = 1;
MyEnum e = (MyEnum)one;