发布 Blazor 应用程序后，我收到错误“无效的对象名称”答案

【问题标题】：After publish Blazor app I get error "Invalid object name"发布 Blazor 应用程序后，我收到错误“无效的对象名称”
【发布时间】：2021-10-25 12:30:31
【问题描述】：

我有一个 Blazor 应用程序 (Wasm)，托管 ASP.NET (.net 5)。调试时一切正常。但是，如果我发布应用程序并运行已编译的 EXE，则会收到以下错误。我在应用程序中使用了两个数据库，错误提到了第二个。有人可以指出问题所在的方向吗？调试和发布版本的连接字符串设置相同。

感谢您的帮助。

fail: Microsoft.EntityFrameworkCore.Database.Command[20102]
      Failed executing DbCommand (7ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT [a].[Id], [a].[City], [a].[Company], [a].[CompanyShort], [a].[Country], [a].[Note], [a].[Street]
      FROM [AisCustomer] AS [a]
fail: Microsoft.EntityFrameworkCore.Query[10100]
      An exception occurred while iterating over the results of a query for context type 'Vks.Server.Data.AisDbContext'.      Microsoft.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AisCustomer'.
         at Microsoft.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__169_0(Task`1 result)
         at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
         at System.Threading.Tasks.Task.<>c.<.cctor>b__277_0(Object obj)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
      --- End of stack trace from previous location ---
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
      ClientConnectionId:99e2a360-bb51-4a54-ac4a-ba6addc7cfd4
      Error Number:208,State:1,Class:16
      Microsoft.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AisCustomer'.
         at Microsoft.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__169_0(Task`1 result)
         at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
         at System.Threading.Tasks.Task.<>c.<.cctor>b__277_0(Object obj)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
      --- End of stack trace from previous location ---
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
      ClientConnectionId:99e2a360-bb51-4a54-ac4a-ba6addc7cfd4
      Error Number:208,State:1,Class:16
fail: Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[1]
      An unhandled exception has occurred while executing the request.
      Microsoft.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AisCustomer'.
         at Microsoft.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__169_0(Task`1 result)
         at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
         at System.Threading.Tasks.Task.<>c.<.cctor>b__277_0(Object obj)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
      --- End of stack trace from previous location ---
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
         at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToDictionaryAsync[TSource,TKey,TElement](IQueryable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToDictionaryAsync[TSource,TKey,TElement](IQueryable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer, CancellationToken cancellationToken)
         at Vks.Server.Controllers.OrderController.GetAll() in C:\Users\hladik\Documents\Source Code\vks\Server\Controllers\OrderController.cs:line 72
         at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
         at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
         at IdentityServer4.Hosting.IdentityServerMiddleware.Invoke(HttpContext context, IEndpointRouter router, IUserSession session, IEventService events, IBackChannelLogoutService backChannelLogoutService)
         at IdentityServer4.Hosting.MutualTlsEndpointMiddleware.Invoke(HttpContext context, IAuthenticationSchemeProvider schemes)
         at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
         at IdentityServer4.Hosting.BaseUrlMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.Builder.Extensions.MapWhenMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)
      ClientConnectionId:99e2a360-bb51-4a54-ac4a-ba6addc7cfd4
      Error Number:208,State:1,Class:16

更新：在这两种情况下，appsettings.json 都是相同的，除了 IdentityServer 部分。在那里我添加了一个密钥部分（链接到证书）。

// appsettings.json
{
  "ConnectionStrings": {
    "DefaultConnection": "Server=testmachine;Database=vks;User=myUser;Password=myPasswd",
    "AISConnection": "Server=testmachine;Database=ais;User=myUser;Password=myPasswd"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "IdentityServer": {
    "Key": {
        "Type": "Store",
        "StoreName": "My",
        "StoreLocation": "CurrentUser",
        "Name": "CN=VksCertificate" 
    },
    "Clients": {
      "Vks.Client": {
        "Profile": "IdentityServerSPA"
      }
    }
  },
"AllowedHosts": "*"
}

【问题讨论】：

表示 SQL 中不存在对象名称 - 发布和调试之间是否还有其他区别，例如哪个帐户正在对数据库进行身份验证？
这与 Blazor 无关。该错误表示该表在数据库中不存在。您是否也部署了数据库？您是否连接到错误的数据库？如果您使用 EF Core 迁移，您是否执行过它们？
如果我从调试转到发布，是否需要将迁移重新应用到同一个数据库？我假设如果迁移相同，则不必重新应用。

标签： c# .net entity-framework

【解决方案1】：

谢谢大家的建议，虽然很尴尬，但我会在这里解决我的问题。我没有注意到发布应用程序后，在文件夹 publish 中创建了三个 appsettings 文件（appsettings.json、appsettings.development.json、appsettings.production.json），这就是我的问题。我在 appsettings.production.json 文件中有错误的数据库名称。我不知道为什么，我根本不知道这个文件。

【讨论】：