问题
I am trying to install and configure Umbraco 8. The NuGet installs umbracoCms well then I run the app to configure the database (custom DB).
And it crashes displaying:
Error during installation
See the log for full details (logs can typically be found in the App_Data\Logs folder)
The log doesn't tell e much:
{"@t":"2019-04-24T04:04:00.1230739Z","@mt":"An error occurred in InstallStatus trying to check upgrades","@l":"Error","@x":"System.NullReferenceException: Object reference not set to an instance of an object.\r\n at Umbraco.Web.Install.InstallHelper.GetDbProviderString(ISqlContext sqlContext)\r\n at Umbraco.Web.Install.InstallHelper.InstallStatus(Boolean isCompleted, String errorMsg)","SourceContext":"Umbraco.Web.Install.InstallHelper","ProcessId":1180,"ProcessName":"iisexpress","ThreadId":13,"AppDomainId":3,"AppDomainAppId":"LMW3SVC2ROOT","MachineName":"Machine1","Log4NetLevel":"ERROR","HttpRequestNumber":4,"HttpRequestId":"{requestguid}"}
The DB connestring is correct, the database tables are getting created although from the error message I am not able to figure out it's a problem with DB or the app.
The same things happened with Umbraco 7.10.
I am running the project on .NET 4.7.2, in VS 15.9.11 and MSSQL 2016
来源：https://stackoverflow.com/questions/55822367/how-to-correctly-install-umbraco-7-10-or-8-getting-stuck-on-db-configuration