这是我实现它的方法。
static class PrimitiveTypes
{
public static readonly Type[] List;
static PrimitiveTypes()
{
var types = new[]
{
typeof (Enum),
typeof (String),
typeof (Char),
typeof (Guid),
typeof (Boolean),
typeof (Byte),
typeof (Int16),
typeof (Int32),
typeof (Int64),
typeof (Single),
typeof (Double),
typeof (Decimal),
typeof (SByte),
typeof (UInt16),
typeof (UInt32),
typeof (UInt64),
typeof (DateTime),
typeof (DateTimeOffset),
typeof (TimeSpan),
};
var nullTypes = from t in types
where t.IsValueType
select typeof (Nullable<>).MakeGenericType(t);
List = types.Concat(nullTypes).ToArray();
}
public static bool Test(Type type)
{
if (List.Any(x => x.IsAssignableFrom(type)))
return true;
var nut = Nullable.GetUnderlyingType(type);
return nut != null && nut.IsEnum;
}
}
2023年更新
参考@Xav987的答案，这个做法表现更好且代码更少。
static readonly ConcurrentDictionary<Type, bool> IsSimpleTypeCache = new ConcurrentDictionary<System.Type, bool>();
public static bool IsSimpleType(Type type)
{
return IsSimpleTypeCache.GetOrAdd(type, t =>
type.IsPrimitive ||
type.IsEnum ||
type == typeof(string) ||
type == typeof(decimal) ||
type == typeof(DateTime) ||
type == typeof(DateOnly) ||
type == typeof(TimeOnly) ||
type == typeof(DateTimeOffset) ||
type == typeof(TimeSpan) ||
type == typeof(Guid) ||
IsNullableSimpleType(type));
static bool IsNullableSimpleType(Type t)
{
var underlyingType = Nullable.GetUnderlyingType(t);
return underlyingType != null && IsSimpleType(underlyingType);
}
}
System.String不是一个基本类型。 - SLaks