构建Service Fabric Web Api时,获取错误无法从Fabric.StatelessServiceContext转换为Fabric.ServiceInitializationParameters

Question

我在学习本教程时遇到错误

cannot convert from 'System.Fabric.StatelessServiceContext' to 'System.Fabric.ServiceInitializationParameters' 

在尝试创建Service Fabric Web Api时,在其中进行了解释.

具体来说,我将在下一行中得到它:

 return new[] {
            new ServiceInstanceListener(initParams =>
            new OwinCommunicationListener("api",new Startup(),initParams) )
        };

我没有尝试太多,因为Azure的Service Fabric是一个非常新的东西,所以在其他Web Api示例方面没有太多的东西.上面的教程本身甚至还没有完成.

有没有人有任何想法？

谢谢

Answer 1

所以问题在于教程中存在拼写错误.

解决方案是_parameters在类中OwinCommunicationListener 应声明为StatelessServiceContext,而不是ServiceInitializationParameters.解决方案是Visual Studio的潜在修复建议的一种解决方案.

为了清楚起见,抛出错误的教程的原始代码如下:

private readonly IOwinAppBuilder _startup;
private readonly string _appRoot;
private readonly ServiceInitializationParameters _parameters;

private string _listeningAddress;
private IDisposable _serverHandle;

public OwinCommunicationListener(
        string appRoot,
        IOwinAppBuilder startup,
        ServiceInitializationParameters serviceInitializationParameters
        )
    {
        _startup = startup;
        _appRoot = appRoot;
        _parameters = serviceInitializationParameters;
    }

而正确的代码是这样的下一个,注意在3号线和11的区别:

private readonly IOwinAppBuilder _startup;
private readonly string _appRoot;
private readonly StatelessServiceContext _parameters;

private string _listeningAddress;
private IDisposable _serverHandle;

public OwinCommunicationListener(
    string appRoot,
    IOwinAppBuilder startup,
    //  Use StatelessServiceContext, NOT ServiceInitializationParameters 
    StatelessServiceContext serviceInitializationParameters 
        )
    {
        _startup = startup;
        _appRoot = appRoot;
        _parameters = serviceInitializationParameters;
    }

电话保持不变:

return new[] {
            new ServiceInstanceListener(initParams =>
            new OwinCommunicationListener("api",new Startup(),initParams) )
        };

我希望这有帮助.