I am using googleglass/mirror-quickstart-dotnet project. I am able to run the application on my local IIS but when I deploy it to the EC2 cloud instance, it keeps throwing the following error :
Server Error in '/GlassApp' Application.
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[SqlException (0x80131904): 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +5064458
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity) +341
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject) +129
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout) +270
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +195
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +232
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +185
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +33
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +524
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +479
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +108
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +126
System.Data.SqlClient.SqlConnection.Open() +125
Please help me resolve this issue.
Thank you for your response. I solved the issue. I installed SQL 2012 express that has localDB by default and installing it, solved my issue
I got the same problem, but after installing the SQL Server I got some other problems when running the site.
To solve that problem I had to add this line to the web.config file
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
Related
I have a .Net 6 Web API hosted on Azure App Service. I also have an Azure SQL Database (Pricing Tier: General Purpose - Serverless: Gen5, 2 vCores).
Both App Service and SQL Database are on the same subscription, same resource group, and same region (South Africa North).
I can connect and perform CRUD operations on the Azure SQL Database from SQL Server Management Studio. Also, the Web API is able to connect and perform CRUD operations on the database, when I'm debugging it locally in Visual Studio.
However, when I publish the Web API to Azure App Service, the app throws the following exception when it tries to connect and write to the Azure SQL Database:
An error occurred using the connection to database 'eballcoz_mssql' on server '156.38.224.15'.
An exception occurred in the database while saving changes for context type 'eBall.Web.API.Data.EBallContext'.
Microsoft.Data.SqlClient.SqlException (0x80131904): 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
---> System.ComponentModel.Win32Exception (5): Access is denied.
at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at Microsoft.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover, SqlAuthenticationMethod authType)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling, String accessToken, DbConnectionPool pool)
at Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
at Microsoft.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
at Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
at Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at Microsoft.Data.ProviderBase.DbConnectionPool.WaitForPendingOpen()
--- End of stack trace from previous location ---
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternalAsync(Boolean errorsExpected, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternalAsync(Boolean errorsExpected, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenAsync(CancellationToken cancellationToken, Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransactionAsync(IsolationLevel isolationLevel, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransactionAsync(CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable`1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable`1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable`1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(IList`1 entriesToSave, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(StateManager stateManager, Boolean acceptAllChangesOnSuccess, 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.DbContext.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)
ClientConnectionId:00000000-0000-0000-0000-000000000000
Error Number:5,State:0,Class:20
I get that exception when the app tries to write a record to a table in the database, using DbContext (EF Core). This is the OnConfiguring() method in my DbContext:
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
optionsBuilder.UseSqlServer("Server=tcp:xxxxx.database.windows.net,1433;Initial Catalog=xxxxx-sqlserver;Persist Security Info=False;User ID=xxxxx;Password=xxxxx;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;");
}
}
I copied this connection string from the "Connection Strings" section of the SQL Databases panel in Azure Portal:
The funny thing is that I also have NLog set up in the API to log errors to this same database, and it's able to do this just fine (it calls a stored proc on the database to log the error). This is my target condiguration in nlog.config:
<target name="db"
xsi:type="Database"
connectionString="Server=tcp:eball.database.windows.net,1433;Initial Catalog=xxxxx-sqlserver;Persist Security Info=False;User ID=xxxxx;Password=xxxxx;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;"
commandType="StoredProcedure"
commandText="[InsertLog]"
>
<parameter name="machineName" layout="${machinename}" />
<parameter name="logged" layout="${date}" />
<parameter name="logLevel" layout="${level}" />
<parameter name="message" layout="${message}" />
<parameter name="logger" layout="${logger}" />
<parameter name="properties" layout="${all-event-properties:separator=|}" />
<parameter name="callsite" layout="${callsite}" />
<parameter name="exception" layout="${exception:tostring}" />
<parameter name="callsiteLineNumber" layout="${callsite-linenumber}" />
<parameter name="stackTrace" layout="${stacktrace}" />
</target>
</targets>
I do have the "Allow Azure services and resources to access this server" ticked in the Networking tab of Azure Portal:
As you can see, I even tried to add the App Service's IP addresses to the firewall (rules "Azure App Service 1-4"), to no avail. The last two rules are to allow SQL Server Management Studio, running on my local PC (at home and at work), to connect.
Now, the fact that the app is able to connect just fine when running locally on my PC tells me that the connection strings are probably fine. So there must be something else not allowing the app to connect to the database when hosted on Azure App Service. Like I mentioned before, the weird thing is that the app is able to log exceptions to the database via NLog (which calls a Stored Proc). However, when trying to connect to the database using a dbContext (EF Core), access is denied.
I'm a bit stumped...
This is the connection string that I am using (and which works with SQL Server Management Studio, and my web app when run locally on VS):
Server=tcp:xxxxx.database.windows.net,1433;Initial Catalog=xxxxx-sqlserver;Persist Security Info=False;User ID=xxxxx;Password=xxxxx;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;
Any ideas?
What's throwing me off is that you said your NLog works perfectly fine and locally it works as well. The only thing I can see is in your screen shot shows eball database on eball-sqlserver. They error message you're receiving is against eballcoz_mssql; that leads me to believe your DbContext is looking for a database in the server that isn't there.
It's a long shot, since it works locally, but I would double check your entity model just be sure you're not inadvertently connecting to a different database. I would also in appsettings.json change Microsoft to Debug so you can get entity framework spit out the SQL connection your DbContext is using.
Sidenote: Add AZURE_SQL_CONNECTION as a SQL connection string app setting and retrieve using config.GetConnectionString("AZURE_SQL_CONNECTION") when using options.UseSql(...) in Program.cs (or Startup.cs)
I am trying to connect to SQL Server Management Studio. My team uses the same details and are able to connect. I am new to the team.
Can anyone help me connect to it?
Edit: As it turned out, I do not have permission to makes changes in firewall settings etc. I double checked from seniors, they told that no changes in such settings are required. Is there some other way? What must be going wrong?
Edit : Error popup on connecting ---This is the popup I get while connecting.
Authentication Type ScreenShot --- Some other details.
I am getting following technical details--
===================================
Cannot connect to devsql17.mmm.com.1930.
===================================
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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
------------------------------
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=53&LinkId=20476
------------------------------
Error Number: 53
Severity: 20
State: 0
------------------------------
Program Location:
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity)
at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
Thanksss a lot !!
Above question is old, but I ran across similar issue today. I was able to connect to SQL locally but could not connect from within domain and outside.
The SQL Server has to have be connected to a profile with "Turn on File and Printer Sharing".
Control Panel\Network and Internet\Network and Sharing Center
OR it has to be connected in Public profile, if you are trying to connect from public network.
Try updating this setting either by connecting its network to Public or by updating the Turn on .. for sharing.
Check whether the Database Server is Running & if it does please check the firewall. You have to add a exception to 1433, to allow access over the network. And Make Sure TCP/IP is enabled on the Sql Server Configuration Manager.
Enable Inbound and Outbound Rules To Open TCP Port 1433 For SQL Server 2012 instances
Configure Windows Firewall to Work with SQL Server
Not sure what might have caused it, I ended task on some SQL processes in task manager then restarted the computer. Now I can no longer login to SQL Server 2008 R2. This is the error I get when attempting to login:
==================================
Cannot connect to JSMITH.
===================================
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: Named
Pipes Provider, error: 40 - Could not open a connection to SQL Server)
(.Net SqlClient Data Provider)
------------------------------ For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476
------------------------------ Error Number: 2 Severity: 20 State: 0
------------------------------ Program Location:
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException
exception, Boolean breakConnection) at
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject
stateObj) at System.Data.SqlClient.TdsParser.Connect(ServerInfo
serverInfo, SqlInternalConnectionTds connHandler, Boolean
ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean
trustServerCert, Boolean integratedSecurity, SqlConnection
owningObject) at
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo
serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64
timerExpire, SqlConnection owningObject) at
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String
host, String newPassword, Boolean redirectedUserInstance,
SqlConnection owningObject, SqlConnectionString connectionOptions,
Int64 timerStart) at
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection
owningObject, SqlConnectionString connectionOptions, String
newPassword, Boolean redirectedUserInstance) at
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity
identity, SqlConnectionString connectionOptions, Object providerInfo,
String newPassword, SqlConnection owningObject, Boolean
redirectedUserInstance) at
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions
options, Object poolGroupProviderInfo, DbConnectionPool pool,
DbConnection owningConnection) at
System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection
owningConnection, DbConnectionPoolGroup poolGroup) at
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection
owningConnection) at
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection
outerConnection, DbConnectionFactory connectionFactory) at
System.Data.SqlClient.SqlConnection.Open() at
Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo
ci, IServerType server) at
Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
I would suggest to check the following:
Check if SQL Server service is running, if not check EventLog for any service-related errors.
Check that names pipes are enabled in Config Manager. You also might want to try switching to using TCP/IP instead. If you're switching to TCP/IP, you'll need to make sure that SQL Server Browser service is enabled/running as well.
Try restarting your computer. If someone else has admin rights to your server it is possible they could have changed your password.
I solved the problem by executing this in commandprompt:
net start "SQL Server (MSSQLSERVER)"
Im not sure why this fixed it or why the service wasn't starting automatically on windows boot though.
Run Services.msc, Go to SQL Server Agent, Start the service if its not running.
about the service:
Executes jobs, monitors SQL Server, fires alerts, and allows automation of some administrative tasks.
I've created a Winform that connects to SQL Server Express x64 using Trusted Connection string.
On the development machine (Which SQL Server is running on as well) the Winform works 100%, the resulting connection string is:
Persist Security Info=False;
Integrated Security=true;
Initial Catalog=BushBreaksLodgeManager;
server=.\SQLEXPRESS
As soon as I try the same win form on a networked PC it fails to connect. On the remote machine I can see the development machine via Network places i.e. \\JOHN-WIN7PC
The remote PC's resulting connection string is:
Persist Security Info=False;
Integrated Security=true;
Initial Catalog=BushBreaksLodgeManager;
server=\\JOHN-WIN7PC\SQLEXPRESS
I have also enabled TCP-IP on SQL Server (It was set to <default>), turned off all firewalls, anti-malware (not that this should interfer) and anti-virus is not installed on either machine.
SQL database settings are as follows:
==================================================
Authentication method: Windows Authentication
Database: BushBreaksLodgeManager
ServerName: JOHN-WIN7PC\SQLEXPRESS
Instancename: SQLEXPRESS
Computername: JOHN-WIN7PC
Sql Server settings
==================================================
Mixed mode (Win auth and Sql Server)
Connections -> Allow remote connections = true
Any help in this regard would be appreciated as I am at a loss.
I have pasted the exception below:
2011/11/18 04:55:50 PM : Process: UtilsDatabase -> TestDatabaseConnection
2011/11/18 04:56:05 PM : Process: UtilsDatabase -> TestDatabaseConnection Connection failed
2011/11/18 04:56:05 PM : Settings value -> UseIntergratedSecurity: False
2011/11/18 04:56:05 PM : Settings value -> Server: \\JOHN-WIN7PC\SQLEXPRESS
2011/11/18 04:56:05 PM : Settings value -> Database name: BushBreaksLodgeManager
2011/11/18 04:56:05 PM : Connection String: Persist Security Info=False;Integrated Security=true;Initial Catalog=BushBreaksLodgeManager;server=\\JOHN-WIN7PC\SQLEXPRESS
==================== New Exception ====================
2011/11/18 04:56:05 PM
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: SQL Network Interfaces, error: 25 - Connection string is not valid)
.Net SqlClient Data Provider
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity)
at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at BushBreaksLodgeManager.UtilsDatabase.TestDatabaseConnection()
Void OnError(System.Data.SqlClient.SqlException, Boolean)
I think the error is very simple. When connecting to SQL Server you don't prefix the server name with \\, So instead of server=\\JOHN-WIN7PC\SQLEXPRESS you should use server=JOHN-WIN7PC\SQLEXPRESS.
I try to log in to MySQL server managment studio 2005 using windows authentication but the following error is raised:
===================================
Cannot connect to .\MSSQLSERVER.
===================================
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: SQL
Network Interfaces, error: 25 - Connection string is not valid) (.Net
SqlClient Data Provider)
------------------------------ For help, click:
http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=87&LinkId=20476
------------------------------ Error Number: 87 Severity: 20 State: 0
------------------------------ Program Location:
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException
exception, Boolean breakConnection) at
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject
stateObj) at System.Data.SqlClient.TdsParser.Connect(ServerInfo
serverInfo, SqlInternalConnectionTds connHandler, Boolean
ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean
trustServerCert, Boolean integratedSecurity, SqlConnection
owningObject) at
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo
serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64
timerExpire, SqlConnection owningObject) at
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String
host, String newPassword, Boolean redirectedUserInstance,
SqlConnection owningObject, SqlConnectionString connectionOptions,
Int64 timerStart) at
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection
owningObject, SqlConnectionString connectionOptions, String
newPassword, Boolean redirectedUserInstance) at
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity
identity, SqlConnectionString connectionOptions, Object providerInfo,
String newPassword, SqlConnection owningObject, Boolean
redirectedUserInstance) at
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions
options, Object poolGroupProviderInfo, DbConnectionPool pool,
DbConnection owningConnection) at
System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection
owningConnection, DbConnectionPoolGroup poolGroup) at
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection
owningConnection) at
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection
outerConnection, DbConnectionFactory connectionFactory) at
System.Data.SqlClient.SqlConnection.Open() at
Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.ObjectExplorer.ValidateConnection(UIConnectionInfo
ci, IServerType server) at
Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
If it's the default instance, try connecting to just "." and ditch the \MSSQLSERVER. Otherwise, ensure the instance name really is "MSSQLSERVER" and that it's running and listening for network connections on the port you are trying to connect to.
From reading the comments in the other posted answer, it sounds as though your application connection is using different settings to those that you are specifying when using SQL Server Management Studio (SSMS).
Can you clarify if you have installed a default or named instance of SQL Server for us all please?
It may also help if you could share details of the connection string that you are using.
It's difficult to provide a definitive answer to your question from the limited information provided thus far however:
If you are using a default instance then you should be a able to establish a connection using the machine name or IP Address of the relevant server.
If connecting to a named instance then you should be able to connect using the format "servername\instanceName".