Can't Connect .Net Application From Windows Server 2003 To Database Server (SQL Server 2000)
Apr 3, 2008
Hi,
I am having a problem connecting my .net applications from the application server to the database server. When I run the application from my windows xp (sp2) box it works fine. When I try to connect via SQL Management Studio to the database server from the application server I get the same error.
Here is the error:
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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Here is the Environment:
App Server:
Windows Server 2003 Standard Edition
Inside Company's Firewall/ Network
Database Server:
Windows Server 2000 Advanced Edition
SQL Server 2000 SP4
Remote Connections to the Server is checked
Enable Protocols: Named Pipes & TCP/IP
TCP/IP Port: 1402 (I don't know why it isn't the default of 1433)
The db server is sitting out side the Company's firewall (don't ask me why). I can access it fine from inside the firewall on my XP box but not from windows server 2003. There is a web server outside the our network that also connects to the db server with no problem and that is running Windows Server 2003 Web Edition.
I can ping the db server from the app server using the IP address.
I tried using the IP address and the port 1402 in my connection string but that didn't work from any machine (XP and Server).
I imagine the issue is somehow related to the company's firewall but why would it only block Windows Server 2003 and not XP?
I'moving my asp application to a new hosting server.
So when i tried the setup locally with the live DB & application in my test machine... The DB access is denied when application tries to hit the DB.
DB is in seperate machine with SQL Server 2000 & application(ASP) is in Windows server 2003..... Kindly help me with your suggestions....on what went wrong?
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These are two things that I need to facilitate:
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2) I created an MS Access database on my PC, I want to use Access database as a front end to the SQL server database. I will create queries, forms in Access DB, and I want to be able to get the data from SQL server Database to do this. I guess I can use ODBC to connect to tables in SQL server database.
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sqlce30setupen.msi sql2Ken@P4.msi
The SQL environment is X86 as follows: SQL2000 SP4
Microsoft SQL Server 2000 - 8.00.2039 (Intel X86) May 3 2005 23:18:38 Copyright (c) 1988-2003 Microsoft Corporation Standard Edition on Windows NT 5.2 (Build 3790: Service Pack 1)
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//string strConnection = "Provider=Microsoft.Jet.OleDb.4.0;"; //strConnection += @"Data Source=C:BegASPNET11ch12Northwind.mdb"; //Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;User ID=guest;Initial Catalog=Volkswagen;Data Source=DEREKLAPTOP;Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=DEREKLAPTOP;Use Encryption for Data=False;Tag with column collation when possible=False string strConnection = "Provider=SQLOLEDB.1"; strConnection += @"Data Source=C:Program FilesMicrosoft SQL ServerMSSQLDataorthwnd.mdf"; ////strConnection += @"Data Source=DEREKLAPTOP"; data_src.Text = strConnection; string strSQL = "SELECT FirstName, LastName FROM Employees"; DataSet objDataSet = new DataSet(); OleDbConnection objConnection = new OleDbConnection(strConnection); OleDbDataAdapter objAdapter = new OleDbDataAdapter(strSQL, objConnection); objAdapter.Fill(objDataSet, "Employees"); DataView objDataView = new DataView(objDataSet.Tables["Employees"]); dgNameList.DataSource=objDataView; dgNameList.DataBind();
Here is the error message I get in IE:
No error information available: REGDB_E_CLASSNOTREG(0x80040154). 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.OleDb.OleDbException: No error information available: REGDB_E_CLASSNOTREG(0x80040154).
Source Error:
Line 18: OleDbDataAdapter objAdapter = new OleDbDataAdapter(strSQL, objConnection); Line 19: Line 20: objAdapter.Fill(objDataSet, "Employees"); Line 21: DataView objDataView = new DataView(objDataSet.Tables["Employees"]); Line 22: dgNameList.DataSource=objDataView; Source File: C:BegASPNET11ch12datagrid.aspx Line: 20
Stack Trace:
[OleDbException (0x80040154): No error information available: REGDB_E_CLASSNOTREG(0x80040154).]
Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032
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