c# - 如何在 C# 中将 int 转换为枚举？

Question

如何在 C# 中将 int 转换为 enum？

Answer 1

来自一个整数:

YourEnum foo = (YourEnum)yourInt;

来自字符串:

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."
    );
}

来自一个数字:

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