Question

我只在azure上遇到以下错误：

SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - An attempt was made to access a socket in a way forbidden by its access permissions.)

系统正在使用ef.core和mssql运行.core 2。

如果我使用DI提供的DB上下文，那么一切正常，但如果我初始化我自己的DbContext，则会出现错误。

最奇怪的是，如果我运行连接到azure的db的代码的本地副本，那么一切正常，没有错误。仅在代码在azure中运行时才会出现此错误。

我不知道从哪里开始贬低这个...或者为什么这个错误发生在天蓝色

上

跟踪：

    System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, object providerInfo, bool redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, bool applyTransientFaultHandling)
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, uint waitForMultipleObjectsTimeout, bool allowCreate, bool onlyOneCheckConnection, DbConnectionOptions userOptions, out DbConnectionInternal connection)
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions, out DbConnectionInternal connection)
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, out DbConnectionInternal connection)
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions)
System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions)
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource<DbConnectionInternal> retry)
System.Data.SqlClient.SqlConnection.Open()
Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(bool errorsExpected)
Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable+Enumerator.BufferlessMoveNext(bool buffer)
Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions+<>c__DisplayClass12_0.<Execute>b__0(DbContext c, TState s)
Microsoft.EntityFrameworkCore.Storage.Internal.SqlServerExecutionStrategy.Execute<TState, TResult>(TState state, Func<DbContext, TState, TResult> operation, Func<DbContext, TState, ExecutionResult<TResult>> verifySucceeded)
Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute<TState, TResult>(IExecutionStrategy strategy, Func<TState, TResult> operation, Func<TState, ExecutionResult<TResult>> verifySucceeded, TState state)
Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute<TState, TResult>(IExecutionStrategy strategy, TState state, Func<TState, TResult> operation)
Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable+Enumerator.MoveNext()
System.Linq.Enumerable+SelectEnumerableIterator.MoveNext()
System.Linq.Enumerable.TryGetFirst<TSource>(IEnumerable<TSource> source, out bool found)
lambda_method(Closure , QueryContext )
Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler+<>c__DisplayClass17_1.<CompileQueryCore>b__0(QueryContext qc)
Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute<TResult>(Expression query)
Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute<TResult>(Expression expression)
System.Linq.Queryable.FirstOrDefault<TSource>(IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)

Answer 1

在azure中，转到应用程序设置＆gt;连接字符串，并在那里设置您的连接字符串。

例如，如果您在application.json中设置了连接字符串，请执行以下操作：

    {
  "ConnectionStrings": {
    "DefaultConnection": "yourconnectionstring"
  },

然后您在“应用程序设置”下的值＆gt;连接字符串如下：

名称： DefaultConnection

值：YourConnectionString

并从下拉菜单中选择SQL Database。

点击保存，让应用程序重启，你应该好好去。

天蓝色的ef.core错误

1 个答案: