[英]C# How to instantiate type dynamically in code
I would like to know if there is a way to instantiate a generic T type into a true type but dynamically, on execution time.我想知道是否有办法将泛型 T 类型实例化为真正的类型,但在执行时是动态的。
Here is an example of code:这是一个代码示例:
public enum InventoryType
{
Car,
Dog,
House
Cat
}
public static class Main{
private readonly IApiClient _apiClient;
private readonly IPostgreSQL _postgreSql;
public Main()
{
foreach (var inventoryType in default(InventoryType).ToEnumerable())
{
Type type;
switch (inventoryType)
{
case Car:
type = typeof(Car);
break;
case Dog:
type = typeof(Dog);
break;
case House:
type = typeof(House);
break;
case Cat:
type = typeof(Cat);
break;
default:
}
var listOfJson = _apiClient.GetRawData(inventoryType);
List<type> data = JsonConvert.DeserializeObject<List<type>>(listOfJson);
_postgreSql.StoreData<type>(data);
}
}
}
How can I convert generic T type as true class object and use it as generic T type?如何将泛型 T 类型转换为真正的类对象并将其用作泛型 T 类型? For understand: how can I write
_postgreSql.StoreData<Car>(data)
instead of _postgreSql.StoreData<T>(data)
where Car is an variable ?为了理解:我怎样才能写
_postgreSql.StoreData<Car>(data)
而不是_postgreSql.StoreData<T>(data)
其中Car是一个变量?
the easiest way would be something like this最简单的方法是这样的
public Main()
{
foreach (var inventoryType in default(InventoryType).ToEnumerable())
{
switch (inventoryType)
{
case Car:
SaveData<Car>(inventoryType);
break;
case Dog:
SaveData<Dog>(inventoryType);
break;
case House:
SaveData<House>(inventoryType);
break;
case Cat:
SaveData<Cat>(inventoryType);
break;
default:
}
}
}
private static void SaveData<T>(InventoryType inventoryType)
{
var listOfJson = _apiClient.GetRawData(inventoryType);
var data = JsonConvert.DeserializeObject<List<T>>(listOfJson);
_postgreSql.StoreData(data);
}
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