泛型C＃ - 從靜態泛型類創建一個實例

我在我的應用程序中有一個工廠類，但由於我缺乏泛型知識，我不知道如何去創建這種特定類型的實例。泛型C＃ - 從靜態泛型類創建一個實例

有人會友好地指點我如何調用這個類，以便它返回一個服務...任何幫助將不勝感激。

public class ServiceFactory<TService> where TService : WebServicesClientProtocol, new() 
{ 

    public static TService GetSecureService(string serviceUrl, X509Certificate certificate) 
    { 
     if (serviceUrl == null) 
     { 
      throw new ArgumentNullException(nameof(serviceUrl), "Service URL must be specified."); 
     } 

     if (serviceUrl == string.Empty) 
     { 
      throw new ArgumentException("Service URL cannot be empty.", nameof(serviceUrl)); 
     } 

     if (certificate == null) 
     { 
      throw new ArgumentNullException(nameof(certificate), "Client certificate must be specified."); 
     } 

     return Service(serviceUrl, certificate); 
    } 

    private static TService Service(string serviceUrl, X509Certificate certificate) 
    { 
     return ConfigureService((TService)Activator.CreateInstance(typeof(TService)), serviceUrl, certificate); 
    } 

    public static TService ConfigureService(TService service, string serviceUrl, X509Certificate certificate) 
    { 
     service.PreAuthenticate = true; 
     service.Credentials = CredentialCache.DefaultCredentials; 
     service.Timeout = 250; 
     service.Url = serviceUrl; 

     return ConfigureRequestSignature(service, certificate); 
    } 

    private static TService ConfigureRequestSignature(TService service, X509Certificate certificate) 
    { 
     X509SecurityToken signatureToken = new X509SecurityToken(certificate); 
     MessageSignature signature = new MessageSignature(signatureToken); 

     signature.SignatureOptions = SignatureOptions.IncludeTimestamp | SignatureOptions.IncludeSoapBody | SignatureOptions.IncludeMessageId | SignatureOptions.IncludeAction; 

     SoapContext requestContext = service.RequestSoapContext; 
     requestContext.Security.Tokens.Add(signatureToken); 
     requestContext.Security.Elements.Add(signature); 

     // TTL must be less than 60 seconds, otherwise the request will be discarded. 
     requestContext.Security.Timestamp.TtlInSeconds = 50; 

     return service; 
    } 
}

來源

2016-08-03 Maz H

不知道，這可以實例化類的名稱...

var service = ServiceFactory<ConcreteImplementationService>.GetSecureService(url, cert);

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2016-08-03 14:10:57

非常感謝，這是有意義的，它的:)已經有一段時間.. –

@MazH - 如果提供這個解決方案是正確的適合你，請[標記它作爲接受] （http://stackoverflow.com/help/accepted-answer） –

由於您使用靜態方法，使用方法級別的通用參數：

TService GetSecureService<TService>(string serviceUrl, X509Certificate certificate) 
    where TService : WebServicesClientProtocol, new() 
{ 
... 
    return Service<TService>(serviceUrl, certificate); 
}

你可能會發現所有的方法都會使用這個模式，並像上面調用Service（）時那樣傳遞泛型類型。

MSDN文章泛型方法： https://msdn.microsoft.com/en-us/library/twcad0zb.aspx

來源

2016-08-03 14:13:27 AaronLS

泛型C＃ - 從靜態泛型類創建一個實例

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