Question

使用类型构建器我可以动态创建类型。是否可以从匿名类型执行此操作？

到目前为止，我有这个;

//CreateType generates a type (so that I can set it's properties once instantiated) from an //anonymous object. I am not interested in the initial value of the properties, just the Type.
 Type t = CreateType(new {Name = "Ben", Age = 23});
 var myObject = Activator.CreateInstance(t);

现在可以使用Type“t”作为类型参数吗？

我的方法：

public static void DoSomething<T>() where T : new() 
{
}

我想使用动态创建的Type“t”来调用此方法。所以我可以打电话;

DoSomething<t>(); //This won't work obviously

Answer 1

是的，有可能。要将类型用作类型参数，您需要使用MakeGenericType方法：

// Of course you'll use CreateType here but this is what compiles for me :)
var anonymous = new { Value = "blah", Number = 1 };
Type anonType = anonymous.GetType();

// Get generic list type
Type listType = typeof(List<>);
Type[] typeParams = new Type[] { anonType };
Type anonListType = listType.MakeGenericType(typeParams);

// Create the list
IList anonList = (IList)Activator.CreateInstance(anonListType);

// create an instance of the anonymous type and add it
var t = Activator.CreateInstance(anonType, "meh", 2); // arguments depending on the constructor, the default anonymous type constructor just takes all properties in their declaration order
anonList.Add(t);

从匿名对象动态创建对象

1 个答案: