Appsettings.json os x database connection string
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System.ArgumentNullException: Value cannot be null.
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public void Configure( IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) Use this method to configure the HTTP request pipeline. This method gets called by the runtime. GetConnectionString( "DefaultConnection ")) public void ConfigureServices( IServiceCollection services) Use this method to add services to the container. AddJsonFile( "appsettings.json ", optional: false, reloadOnChange: true) Consider the following : Value cannot be null.Īt .NotEmpty(String value, String parameterName)Īt (DbContextOptionsBuilder optionsBuilder, String connectionString, Action`1 sqlServerOptionsAction)Īt _4_0(DbContextOptionsBuilder e) in C:\Users\ddeangelis\Desktop\aspnetcore\DDATest.WebApp\DDATest.WebApp\Startup.cs:line 37Īt .DbContextOptionsFactory(IServiceProvider applicationServiceProvider, Action`2 optionsAction)Īt .CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider)Īt .c_Displa圜lass16_0.b_0(ServiceProvider provider)Īt .GetRequiredService(IServiceProvider provider, Type serviceType)Īt .GetRequiredService(IServiceProvider provider)Īt .CallSiteRuntimeResolver.VisitClosedIEnumerable(ClosedIEnumerableCallSite closedIEnumerableCallSite, ServiceProvider provider)Īt .CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider)Īt .DbContextOperations.FindContextTypes()Īt .DbContextOperations.FindContextType(String name)Īt .DbContextOperations.CreateContext(String contextType)Īt .MigrationsOperations.AddMigration(String name, String outputDir, String contextType)Īt .AddMigrationImpl(String name, String outputDir, String contextType)Īt .OperationBase.c_Displa圜lass3_0`1.b_0()Īt .OperationBase.Execute(Action action) If the structure of your parameters in the appsettings.json file is an object or array, you should read the data differently.
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For example, if while the program is running and you change the value of the Name parameter, when it reaches the Get method, it puts your last changes in the name variable. If we use the IConfiguration interface to read data, the IConfiguration interface gives us the latest changes whenever a change is made to the appsettings.json file. The IConfiguration interface refers to the root of the appsettings.json file, and the Name parameter is located in the root of the appsettings.json file, so we can get the value of the Name parameter directly. In the Get method, we get the value of the Name parameter from the IConfiguration and put it inside the name variable. Public WeatherForecastController(IConfiguration configuration) Private readonly IConfiguration _configuration Public class WeatherForecastController : ControllerBase