[英]How can I use Activator.CreateInstance to instantiate a generic type as part of a using block?
我想要實現的是將以下方法轉換為更通用的方法:
private Task<TestResult> SpecificServiceWarmUp(string serviceEndPoint)
{
return Task<TestResult>.Factory.StartNew(() =>
{
using (var service = new MySpecificClient(serviceEndPoint))
{
// do some stuff with specific client
}
});
}
更通用的版本如下所示:
private Task<TestResult> GenericServiceWarmUp<TService>(string serviceEndPoint)
{
return Task<TestResult>.Factory.StartNew(() =>
{
using (/* instance of TService */)
{
// do some stuff with generic client
}
});
}
我不知道如何告訴using
塊使用Activator
創建泛型類型的實例。 這可能嗎? 如果是這樣,我該怎么做?
private Task<TestResult> GenericServiceWarmUp<TService>()
where TService : IDisposable
{
return Task<TestResult>.Factory.StartNew(() =>
{
using (var service =
(TService)Activator.CreateInstance(typeof(TService), serviceEndPoint))
{
// do some stuff with generic client
}
});
}
否則,如果您的服務沒有構造函數參數 ,則無需使用Activator.CreateInstance
,則存在new()
約束 :
private Task<TestResult> GenericServiceWarmUp<TService>(string serviceEndPoint)
where TService : IDisposable, new()
{
return Task<TestResult>.Factory.StartNew(() =>
{
using (var service = new TService())
{
// do some stuff with generic client
}
});
}
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