SQL Network Interface, Error 28

Oct 7, 2007

When I initially downloaded SQL Server Express the System tables were visible using SQL Server Management Studio Express. I was able to create a new database and define and populate a couple of small tables. I then attempted to set up an ODBC SQL Natvie Client connection so that I could print the table contents using Crystal Reports. That failed with the following error message:
"An error occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default setting SQL Server does not allow remote connections."

I subsequently uninstalled and reinstalled SQL Server Express. Now, I get the following error message whenever I try to connect to the database using SQL Server Management Studio Express. Additionally, the System tables are no longer visible. However, I can access my database via the Server Explorer in VS2005.

TITLE: Connect to Server
------------------------------
Cannot connect to STAN-DELLSQLEXPRESS.
------------------------------
ADDITIONAL INFORMATION:
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 28 - Server doesn't support requested protocol) (Microsoft SQL Server, Error: -1)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476


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Hello all,

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This site receives the following error as seen in the topic:
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Server Error in '/DotNetNuke' Application.
--------------------------------------------------------------------------------

General network error. Check your network documentation.
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: General network error. Check your network documentation.

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Line 281:
Line 282: myConnection.Open()
Line 283: myCommand.ExecuteNonQuery()
Line 284: myConnection.Close()
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Source File: C:DotNetNukeComponentsAdminDB.vb Line: 283

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System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +196
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System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
System.Web.UI.Page.ProcessRequestMain()


--------------------------------------------------------------------------------
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Server Error in '/' Application.


An error has occurred while establishing a connection to the server.
 When connecting to SQL Server 2005, this failure may be caused by the fact that
under the default settings SQL Server does not allow remote connections.
(provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance
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Nov 17, 2005

Hi,I am working with Webparts in ASP.NET and getting following error
An error has occurred while establishing a connection to the server.  When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Can anybody knows how to fix this issue. I have SQL Server 2005 Developer edition.RegardsAhmad

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Provider: SQL Network Interfaces, Error: 26 - Error Locating Server/Instance Specified

Mar 24, 2006

I made a simple ASP.NET 2.0 Website that uses memberships, roles, and access to MS SQL Server 2005 database. Everything works fine on my development computer (WinXP Pro). When I deployed this Website on another computer (WinXP Pro) and tried to access the main page from the same computer, I get the error below.
I disabled the Windows Firewall (the only one I use), I ensured that SQL Server Browser is Active and Running, and I changed Remote Connections in SQL Server 2005 Surface Area Configuration to use Local and Remote connections for all the components.
In my Web.Config I used:
<connectionStrings><add name="sqlConnString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|DBdemo.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/></connectionStrings>
Any idea why am I getting the following error?
 
Server Error in '/WebDV' Application.


An error has occurred while establishing a connection to the server.  When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not 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: An error has occurred while establishing a connection to the server.  When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)Source Error:



Line 2027: sqlConnection = New SqlConnection(sqlString)
Line 2028:
Line 2029: If sqlConnection.State = Data.ConnectionState.Closed Then sqlConnection.Open()
Line 2030: If Not Page.IsPostBack ThenSource File: C:InetpubwwwrootWebDVDefault.aspx.vb    Line: 2029 Stack Trace:



[SqlException (0x80131904): An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734787
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Connect(Boolean& useFailoverPartner, Boolean& failoverDemandDone, String host, String failoverPartner, String protocol, SqlInternalConnectionTds connHandler, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject, Boolean aliasLookup) +820
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +628
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +130
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +496
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
Default1.Page_Load(Object sender, EventArgs e) in C:InetpubwwwrootWebDVDefault.aspx.vb:2029
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061



Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
 

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Provider: Sql Network Interfaces, Error: 26 -Error Locating Server/Instance Specified

Oct 31, 2007

Hi All:
I'm having problem connecting remotely to my sql 2005 server. I do get this error msg
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
I'm using a named Instance and conncting like 192.168.2.1DB120
I have configured to server to accept remote connection.
I can connect locally bout not remotelly

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Provider: SQL Network Interfaces, Error: 26 - Error Locating Server/Instance Specified)

Jul 13, 2007



Hi,



I have been stuck up with this error.

I am using SQL Srver express edition with asp.net 2.0 on windows XP SP2.

When I open the SQL Management studio and execute queries it works fine.

When I exute query in command prompt using SQLCMD -E -S ServernameInstance

It conect with database and I can freely execute queries in command prompt.

I have also tried to connect with Classical ASP 3.0 It also works fine. No error



I have made all changes that u specified in ur article.



But When I try to connect with asp.net. It gives me error.



"provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)"


Same files are workign fine in my office with SQL Server 2005 enterprise edition and ASp.net 2.0. on Windows server 2003. I do not get this error. But at home I am facing this problem again and again.

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When Asynchronous Processing=true, I Get Provider: SQL Network Interfaces, Error: 26 - Error Locating Server/Instance Specified

Sep 26, 2007

This problem happens on this particular machine and doesn't happen on other machines that I have. And I think this problem belongs to this forum. Because the problem is triggered by a special setting in the connection string.
I followed the steps of threads including Xinwei Hong's instruction for fixing this error(26) but has no luck.

The problem occurs when I call SqlConnection.Open().

I am using window xp, sql2000. the named instance is on local machine, my connection string is like

"Data Source=MSL-1417762\SQL2000;Initial Catalog=PopulateForeignKeys_MSL_1417762_2_5984;Integrated Security=True;Pooling=False;Asynchronous Processing=true"

Whenever I change Asynchronous Processing=true into Asynchronous Processing=false, the problem is gone.

This problem also occurs when I use Visual Studio - Server Explorer - Add Connection dialog - Advanced button - Advanced Properties window where you can set Asynchronous Processing property to true.

Can you please help?

Thanks,

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SQL Network Interfaces, Error: 26 - Error Locating Server/Instance Specified

Jun 12, 2006

I'm having an issue when moving my site from my laptop that's running VWD Express and SQL 2005 Express to my production Windows 2003 server running SQL 2005 Standard.  The site is a portal site that authenticates to my Active Directory, and uses roles bases in SQL.  I can open the site on the laptop and everything works fine and I have no problems.  Once I copy the site to the production server and try to access the site, I get the login page fine and try to login.  The default page never opens so I'm thinking this must be some type of roles issue.  Do I need to do anything with my ASPNETDB.MDF file to make it work with SQL 2005 Standard instead of Express version?  I've already made sure that the SQL server is accepting remote connections...what other things do I need to do to my SQL server to ensure proper functioning?  Any particular security user I need to be running particular services under?  Thanks in advance...
MikeD

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