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Overview
DSN-Less Connection
DSN Connection
- ODBC DSN
OLE DB Provider
OLE DB Data Link Connections
- Data Link File - UDL

Overview

Generally, one of the first steps when you are trying to work with databases is open it. You can find several types of those, and each have a different mode of connection. When you try to connect with your database sometimes, you don't know the correct connection string that you must use. It is for that I wrote this article. I wanted to compile the connection strings to the majority of known databases...

ODBC DSN Less Connection

ODBC Driver for dBASE

strConnection = _T("Driver={Microsoft dBASE Driver (*.dbf)};DriverID=277;"
                   "Dbq=c:\\DatabasePath;");

Note: You must specify the filename in the SQL statement... For example:

CString strQuery = _T("Select Name, Address From Clients.dbf");

ODBC Driver for Excel

strConnection = _T("Driver={Microsoft Excel Driver (*.xls)};DriverId=790;"
    bq=C:\\DatabasePath\\DBSpreadSheet.xls;DefaultDir=c:\\databasepath;");

ODBC Driver for Text

strConnection = _T("Driver={Microsoft Text Driver (*.txt; *.csv)};"
        "Dbq=C:\\DatabasePath\\;Extensions=asc,csv,tab,txt;");

If you are using tab delimited files, you must create the schema.ini file, and you must inform the Format=TabDelimited option in your connection string.

Note: You must specify the filename in the SQL statement... For example:

CString strQuery = _T("Select Name, Address From Clients.csv");

Visual FoxPro

If you are using a database container, the connection string is the following:

strConnection = _T("Driver={Microsoft Visual Foxpro Driver};UID=;"
    ourceType=DBC;SourceDB=C:\\DatabasePath\\MyDatabase.dbc;Exclusive=No");

If you are working without a database container, you must change the SourceType parameter by DBF as in the following connection string:

strConnection = _T("Driver={Microsoft Visual Foxpro Driver};UID=;"
    "SourceType=DBF;SourceDB=C:\\DatabasePath\\MyDatabase.dbc;Exclusive=No");

ODBC Driver for Access

strConnection = _T("Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=c:\\DatabasePath\\dbaccess.mdb;Uid=;Pwd=;");

If you are using a Workgroup (System database): you need to inform the SystemDB Path, the User Name and its password. For that, you have two solutions: inform the user and password in the connection string or in the moment of the open operation. For example:

strConnection = _T("Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=C:\\VC Projects\\ADO\\Samples\\AdoTest\\dbTestSecurity.mdb;"
        "SystemDB=C:\\Program Files\\Microsoft Office\\Office\\SYSTEM.mdw;"
        "Uid=Carlos Antollini;Pwd=carlos");

or may be:

strConnection = _T("Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=C:\\VC Projects\\ADO\\Samples\\AdoTest\\dbTestSecurity.mdb;"
        "SystemDB=C:\\Program Files\\Microsoft Office\\Office\\SYSTEM.mdw;");
if(pDB.Open(strConnection, "DatabaseUser", "DatabasePass"))
{
    DoSomething();
    pDB.Close();
}

If you want to open in Exclusive mode:

strConnection = _T("Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=c:\\DatabasePath\dbaccess.mdb;Exclusive=1;");

ODBC Driver for SQL Server

For Standard security:

strConnection = _T("Driver={SQL Server};Server=MyServerName;"
        "Trusted_Connection=no;"
        "Database=MyDatabaseName;Uid=MyUserName;Pwd=MyPassword;");

For Trusted Connection security (Microsoft Windows NT integrated security):

strConnection = _T("Driver={SQL Server};Server=MyServerName;"
     "Database=myDatabaseName;Uid=;Pwd=;");

Also, you can use the parameter Trusted_Connection that indicates that you are using the Microsoft Windows NT Authentication Mode to authorize user access to the SQL Server database. For example:

strConnection = _T("Driver={SQL Server};Server=MyServerName;"
    "Database=MyDatabaseName;Trusted_Connection=yes;");

If the SQL Server is running in the same computer, you can replace the name of the server by the word (local) like in the following sample:

strConnection = _T("Driver={SQL Server};Server=(local);"
        "Database=MyDatabaseName;Uid=MyUserName;Pwd=MyPassword;");

If you want to connect with a remote SQL Server, you must inform the address, the port, and the Network Library to use:

The Address parameter must be an IP address and must include the port. The Network parameter can be one of the following:

dbnmpntw Win32 Named Pipes
dbmssocn Win32 Winsock TCP/IP
dbmsspxn Win32 SPX/IPX
dbmsvinn Win32 Banyan Vines
dbmsrpcn Win32 Multi-Protocol (Windows RPC)

For more information, see Q238949.

strConnection = _T("Driver={SQL Server};Server=130.120.110.001;"
     "Address=130.120.110.001,1052;Network=dbmssocn;Database=MyDatabaseName;"
     "Uid=myUsername;Pwd=myPassword;");

ODBC Driver for Oracle

For the current Oracle ODBC driver from Microsoft:

strConnect = _T("Driver={Microsoft ODBC for Oracle};Server=OracleServer.world;"
        "Uid=MyUsername;Pwd=MyPassword;");

For the older Oracle ODBC driver from Microsoft:

strConnect = _T("Driver={Microsoft ODBC Driver for Oracle};"
     "ConnectString=OracleServer.world;Uid=myUsername;Pwd=myPassword;");

ODBC Driver for MySQL

If you want to connect to a local database, you can use a connection string like the following:

strConnect = _T("Driver={MySQL ODBC 3.51 Driver};Server=localhost;"
     "Database=MyDatabase;User=MyUserName;Password=MyPassword;Option=4;");

If you want to connect with a remote database, you need to specify the name of the server or its IP in the Server parameter. If the Port is distinct to 3306 (default port), you must specify it.

strConnect = _T("Driver={mySQL ODBC 3.51 Driver};Server=MyRemoteHost;"
     "Port=3306;Option=4;Database=MyDatabase;Uid=MyUsername;Pwd=MyPassword;");

The parameter Option can be one or more of the following values:

1 - The client can't handle that MyODBC returns the real width of a column.
2 - The client can't handle that MySQL returns the true value of affected rows. If this flag is set then MySQL returns 'found rows' instead. One must have MySQL 3.21.14 or newer to get this to work.
4 - Make a debug log in c:\myodbc.log. This is the same as putting MYSQL_DEBUG=d:t:O,c::\myodbc.log in AUTOEXEC.BAT.
8 - Don't set any packet limit for results and parameters.
16 - Don't prompt for questions even if driver would like to prompt.
32 - Enable or disable the dynamic cursor support. This is not allowed in MyODBC 2.50.
64 - Ignore use of database name in 'database.table.column'.
128 - Force use of ODBC manager cursors (experimental).
256 - Disable the use of extended fetch (experimental).
512 - Pad CHAR fields to full column length.
1024 - SQLDescribeCol() will return fully qualified column names.
2048 - Use the compressed server/client protocol.
4096 - Tell server to ignore space after function name and before '(' (needed by PowerBuilder). This will make all function names keywords!
8192 - Connect with named pipes to a MySQLd server running on NT.
16384 - Change LONGLONG columns to INT columns (some applications can't handle LONGLONG).
32768 - Return 'user' as Table_qualifier and Table_owner from SQLTables (experimental).
65536 - Read parameters from the client and ODBC groups from my.cnf.
131072 - Add some extra safety checks (should not be needed but...).

If you want to have multiple options, you should add the above flags! For example: 16 + 1024 = 1030 and use Option= 1030;.

For more information, go to MyODBC Reference Manual.

ODBC Driver for AS400

strConnect = _T("Driver={Client Access ODBC Driver (32-bit)};System=myAS400;"
      "Uid=myUsername;Pwd=myPassword;");

ODBC Driver for SyBase

strConnect = _T("Driver={Sybase System 10};Srvr=MyServerName;Uid=MyUsername;"
       "Pwd=myPassword;");

ODBC Driver for Sybase SQL AnyWhere

strConnect = _T("ODBC;Driver=Sybase SQL Anywhere 5.0;"
    "DefaultDir=C:\\DatabasePath\;Dbf=C:\\SqlAnyWhere50\\MyDatabase.db;"
    "Uid=MyUsername;Pwd=MyPassword;Dsn=\"\";");

DSN Connection

ODBC DSN

strConnect = _T("DSN=MyDSN;Uid=MyUsername;Pwd=MyPassword;");

OLE DB Provider

OLE DB Provider for SQL Server

For Standard security:

strConnect = _T("Provider=sqloledb;Data Source=MyServerName;"
        "Initial Catalog=MyDatabaseName;"
        "User Id=MyUsername;Password=MyPassword;");

For Trusted Connection security (Microsoft Windows NT integrated security):

strConnect = _T("Provider=sqloledb;Data Source=MyServerName;"
        "Initial Catalog=MyDatabaseName;"
        "Integrated Security=SSPI;");

If you want to connect to a "Named Instance" (SQL Server 2000), you must to specify Data Source=Servere Name\Instance Name like in the following example:

strConnect = _T("Provider=sqloledb;Data Source=MyServerName\MyInstanceName;"
    "Initial Catalog=MyDatabaseName;User Id=MyUsername;Password=MyPassword;");

If you want to connect with a SQL Server running on the same computer, you must specify the keyword (local) in the Data Source like in the following example:

strConnect = _T("Provider=sqloledb;Data Source=(local);"
        "Initial Catalog=myDatabaseName;"
        "User ID=myUsername;Password=myPassword;");

To connect to SQL Server running on a remote computer (via an IP address):

strConnect = _T("Provider=sqloledb;Network Library=DBMSSOCN;"
        "Data Source=130.120.110.001,1433;"
        "Initial Catalog=MyDatabaseName;User ID=MyUsername;"
        "Password=MyPassword;");

OLE DB Provider for MySQL (By Todd Smith)

strConnection = _T("Provider=MySQLProv;Data Source=test");

Where test is the name of MySQL database. Also, you can replace the name of the database by the following connection string: server=localhost;DB=test.

OLE DB Provider for AS400

strConnect = _T("Provider=IBMDA400;Data source=myAS400;User Id=myUsername;"
     "Password=myPassword;");

For more information, see: Using the OLE DB Provider for AS/400 and VSAM.

OLE DB Provider for Active Directory

strConnect = _T("Provider=ADSDSOObject;User Id=myUsername;Password=myPassword;");

For more information, see: Microsoft OLE DB Provider for Microsoft Active Directory Service.

OLE DB Provider for DB2

If you are using a TCP/IP connection:

strConnect = _T("Provider=DB2OLEDB;Network Transport Library=TCPIP;"
        "Network Address=130.120.110.001;"
        "Initial Catalog=MyCatalog;Package Collection=MyPackageCollection;"
        "Default Schema=MySchema;User ID=MyUsername;Password=MyPassword;");

If you are using APPC connection:

strConnect = _T("Provider=DB2OLEDB;APPC Local LU Alias=MyLocalLUAlias;"
        "APPC Remote LU Alias=MyRemoteLUAlias;Initial Catalog=MyCatalog;"
        "Package Collection=MyPackageCollection;Default Schema=MySchema;"
        "User ID=MyUsername;Password=MyPassword;");

For more information, see: Using the OLE DB Provider for DB2.

OLE DB Provider for Microsoft Jet

Connecting to an Access file using the JET OLE DB Provider:

Using Standard security:

strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;"
        "Data Source=C:\\DatabasePath\\MmDatabase.mdb;"
        "User Id=admin;Password=;");

If you are using a Workgroup (System database):

strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;"
        "Data Source=C:\\DataBasePath\\mydb.mdb;"
        "Jet OLEDB:System Database=MySystem.mdw;");
pRs.Open(strConnect, "MyUsername", "MyPassword");

Connecting to an Excel Spreadsheet using the JET OLE DB Provider:
```
strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;"
        "Data Source=C:\\DatabasePath\\DBSpreadSheet.xls;"
        "Extended Properties=\"\"Excel 8.0;HDR=Yes;\"\";");
```
Note: If "HDR=Yes", the provider will not include the first row of the selection into the recordset. If "HDR=No", the provider will include the first row of the cell range (or named ranged) into the recordset.

For more information, see: Q278973.

Connecting to a Text file using the JET OLE DB Provider:

strConnect = 
        _T("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\DatabasePath\\;"
        "Extended Properties=\"\"text;"
        "HDR=Yes;FMT=Delimited;\"\";");

Note: You must specify the filename in the SQL statement... For example:

CString strQuery = _T("Select Name, Address From Clients.txt");

For more information, see: Q262537.

Connecting to an Outlook 2000 personal mail box using the JET OLE DB Provider: (By J. Cardinal)
```
strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;Outlook 9.0;"
      "MAPILEVEL=;DATABASE=C:\\Temp\\;")
```
Replace c:\temp with any temporary folder. It will create a schema file in that folder when you open it which shows all the fields available. Blank MAPILEVEL indicates top level of folders).
Connecting to an Exchange mail box through JET: (By J. Cardinal)
```
strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;Exchange 4.0;"
      "MAPILEVEL=Mailbox - Pat Smith|;DATABASE=C:\\Temp\\;")
```
You must replace c:\temp with any temporary folder.

Replace Pat Smith with the name of the mail box and you must keep vertical pipe character | to indicate top level of folders. Place sub folder after vertical pipe if accessing specific folder.

Note: you can enter queries against the mail store just like a database... For example:
```
CString strQuery = _T("SQL "SELECT Contacts.* FROM Contacts;");
```
For more information, see: The Jet 4.0 Exchange/Outlook IISAM.

OLE DB Provider for ODBC Databases

If you want to connect with a Microsoft Access database:

strConnect = _T("Provider=MSDASQL;Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=c:\\DatabasePath\\MyDatabase.mdb;Uid=MyUsername;Pwd=MyPassword;");

If you want to connect with a SQL Server database:

strConnect = _T("Provider=MSDASQL;Driver={SQL Server};Server=MyServerName;"
        "Database=MyDatabaseName;Uid=MyUsername;Pwd=MyPassword;");

If you want to use DSN:

strConnect = _T("Provider=MSDASQL;PersistSecurityInfo=False;"
        "Trusted_Connection=Yes;"
        "Data Source=MyDSN;catalog=MyDatabase;");

For more information, see: Microsoft OLE DB Provider for ODBC.

OLE DB Provider for OLAP

Microsoft® OLE DB for Online Analytical Processing (OLAP) is a set of objects and interfaces that extends the ability of OLE DB to provide access to multidimensional data stores.

strConnect = _T("Provider=MSOLAP;Data Source=MyOLAPServerName;"
     "Initial Catalog=MyOLAPDatabaseName;");

Connection using HTTP:

This feature enables a client application to connect to an Analysis server through Microsoft® Internet Information Services (IIS) by specifying a URL in the Data Source property in the client application's connection string. This connection method allows PivotTable® Service to tunnel through firewalls or proxy servers to the Analysis server. A special Active Server Pages (ASP) page, Msolap.asp, enables the connection through IIS. The directory in which this file resides must be included as part of the URL when connecting to the server (for example, http://www.myserver.com/myolap/).

Using a URL

strConnect = _T("Provider=MSOLAP;Data Source=http://MyOLAPServerName/;"
     "Initial Catalog=MyOLAPDatabaseName;");

Using SSL

strConnect = _T("Provider=MSOLAP;Data Source=https://MyOLAPServerName/;"
     "Initial Catalog=MyOLAPDatabaseName;");

For more information, see: OLE DB for OLAP, Connecting Using HTTP.

OLE DB Provider for Oracle

OLE DB Provider for Oracle (from Microsoft)

The Microsoft OLE DB Provider for Oracle allows ADO to access Oracle databases.

strConnect = _T("Provider=MSDAORA;Data Source=MyOracleDB;User Id=myUsername;"
     "Password=myPassword;");

For more information, see: Microsoft OLE DB Provider for Oracle.

OLE DB Provider for Oracle (from Oracle).

For Standard security:

strConnect = _T("Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;"
        "User Id=myUsername;Password=myPassword;");

For a Trusted connection:

OS Authenticated connect setting user ID to "/":

strConnect = _T("Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;"
   "User Id=/;Password=;");

OS Authenticated connect using OSAuthent:
```
strConnect = _T("Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;OSAuthent=1;")
```
Note: "Data Source=" must be set to the appropriate Net8 name which is known to the naming method in use. For example, for Local Naming, it is the alias in the tnsnames.ora file; for Oracle Names, it is the Net8 Service Name.

For more information, see: Oracle Provider for OLE DB Developer's Guide.

OLE DB Provider for Visual FoxPro

strConnect = _T("Provider=vfpoledb;"
     "Data Source=C:\\DatabasePath\\MyDatabase.dbc;");

For more information, see: Microsoft OLE DB Provider for Visual FoxPro.

OLE DB Provider for Index Server (By Chris Maunder)

strConnect = _T("provider=msidxs;Data Source=MyCatalog;");

For more information, see: Microsoft OLE DB Provider for Microsoft Indexing Service.

OLE DB Data Link Connections

Data Link File - UDL

strConnection = _T("File Name=c:\\DataBasePath\\DatabaseName.udl;");

If you want to create a Data Link File, you can make a new empty text file, change its extension by .udl, then double click over the file, and the operating system calls for you the Data Link app.

[ Data Link Application ]

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

Carlos Antollini

Carlos Antollini is a software engineer working on Object Oriented, Visual C++, MFC, COM, ATL, ADO, Internet technologies and Business Intelligence.
Carlos is originally from Argentina, he was living for several years in Fort Lauderdale, Florida, working for Citibank. Then he started his own business.
Carlos is the creator of piFive[^], a family of BI Analytic Platform software, that it deals next to, latinsys[^], his partner in businesses...
Actually he is sharing his passion for project management and BI at Citibank and his own business.

Occupation:	Architect
Company:	Citigroup
Location:	Argentina

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Subject

Author

Date

how to connect vc++ with mysql

x_men072000

7:31 18 May '08

hi all, plz help . can anyone help me with the code to connect MYSQL with vc++6/vc++ 2008. plz also help as how to inclde the dlls or libraries. plz mention the the whole process from using MYSQL to connecting mysql. i m a begginer in this. it will be a great help. thank you.
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database connection with sqllite with vc++

x_men072000

20:28 15 May '08

plz help. how do i connect to sqllite expert with vc++2008. plz mention dsn less and through dsn. also mention a generic way of connecting other databases like berkely db or mysql. it would be a great help
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Connect DBF database

AnhTin

4:20 9 Dec '07

i have problem when connect DBF database file
when i connect database with oledb in .net 2.0(asp.net)
i see if name file DBF smaller than 8 character is Okay if lager 8 character is exception
The Microsoft Jet database engine could not find the object 'demodemodemo.dbf'. Make sure the object exists and that you spell its name and the path name correctly.

How can i connect DBF database file so not depend with name file ????

2.00/5 (1 vote)

Re: Connect DBF database

Evan Stein

7:28 9 Dec '07

Hi.

The problem is that the old drivers are expecting DOS names -- someone forgot to upgrade them. For names larger than 8 characters, you want something like DEMODE~1.DBF. The code below will do that for you:


       [DllImport("Kernel32", CharSet = CharSet.Auto)]
        static extern Int32 GetShortPathName(
        String path,                // input string
        StringBuilder shortPath,    // output string
        Int32 shortPathLength);     // StringBuilder.Capacity

        public static string ConvertLongPathToShort(string longPathName)
        {
            StringBuilder shortNameBuffer;
            int size;

            shortNameBuffer = new StringBuilder();

            size = GetShortPathName(longPathName, shortNameBuffer,
				      shortNameBuffer.Capacity);
            if (size >= shortNameBuffer.Capacity)
            {
                shortNameBuffer.Capacity = size + 1;
                GetShortPathName(longPathName, shortNameBuffer, shortNameBuffer.Capacity);
            }

            return shortNameBuffer.ToString();
        }

Good luck!

1.00/5 (1 vote)

i can't connect to firebird db

nasim

20:06 8 Dec '07

i install ibprovider v3 free version and copy "gds32.dll" in to system32 directory but when i run my program show this error: Message 1: [dbobj] Loading client library "gds32.dll". The specified module could not be found. plz help me end reply 2 me ASAP. best regards;
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http://www.connectionstrings.com/

Robin Debnath

8:44 17 Nov '07


Sign In·View Thread·PermaLink	2.33/5 (3 votes)

Does System.Data.OracleClient support switch schema while connecting to Oracle?

Kent Liu

17:31 14 Nov '07

Hi,
I am using OS Authentication mode in Oracle, and after OracleConnection.Open method, I need to call OracleCommand.Execute ("alter session set current_schame=xxx") command to switch the schema to the application schema (not the logon user schema).
Is there any way to specfied something in connection string or a callback after OracleConnection.Open executed to run the alter session command?
Because System.Data.OracleClient.OracleConnection is sealed, so I can't make one new class to inherit it.

Do you have any good ideas ?
Thanks!

Do or do not, there is no try.

connection method????

younghoyu

23:11 24 Oct '07

It wants knowing the connection method of the firebird.
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Connection String for SQL Server 2005 Compact Edition

dennis tan

6:22 11 Jul '07

Anybody knows the connection string SQL Server 2005 compact edition? When I put in, for exmaple, CString strConnection = (CString ) _T("Data Source=C:\\NiFUDatabase\\netlink.sdf;" + "Password=gemini;" + "Persist Security Info=False;"); It does not work on the Connect method. Any idea? Thanks
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Re: Connection String for SQL Server 2005 Compact Edition

europebeat

6:29 7 Aug '07

I have the same issue. Please post back if you figure out how to do it. Thanks!
Sign In·View Thread·PermaLink	1.00/5 (1 vote)

Weird problem wth MySQL...

Michael Chourdakis

10:41 22 May '07

Hi ... usually the strings work well, but when I am trying to use ADO with MySQL, it happens that the connection is successful, but every other call returns a 'database closed' error and fails (either an Execute() , or an OpenSchema()) Please help.
Sign In·View Thread·PermaLink	2.00/5 (1 vote)

Connecting to an Access file using workgroup (system database)

samsertial

11:50 16 May '07

Hello, I am looking for your help in connecting a web page in ASP.NET 2.0 TO MS Access using workgroup:
I received this error:
1- Not a valid account name or password.
2-Cannot start your application. The workgroup information file is missing or opened exclusively by another user. (when impersonate the web.config with user/pwd for Windows xp account)
- The error occur on objDataset(fill..)
Also on your code you wrote: pRS.Open(strConnect,"","")! what you mean by pRS and where actually you define this part.

My code:
Dim connectionString As String
connectionString = ("Provider=Microsoft.Jet.OLEDB.4.0; " & _
"Data Source=\\xxx_SERVER\DATA\INC.mdb;" & _
"Jet OLEDB:System Database=\\xx_SERVER\DATA\System.mdw;") & _
" Uid=ssertial;pwd=sssss "
dim strSql As String
Try
Dim objConnection As New OleDbConnection(connectionString)

strSql = " SELECT * FROM q_24_7 WHERE [Incident Date] BETWEEN # " & Str1 & " # AND #" & Str2 & "# "
Dim objAdapter As New OleDbDataAdapter
Dim objDataSet As New DataSet("q_24_7")
Dim objComm As New OleDbDataAdapter(strSql, objConnection)
objComm.Fill(objDataSet, "q_24_7")
Dim reportPath As String = Server.MapPath("AssaultsAltercations.rpt")
cr_weekly_typed.Load(reportPath)
cr_weekly_typed.SetDataSource(objDataSet)
'set the viewer to the report object to be reviewd
CrystalReportViewer1.ReportSource = cr_weekly_typed
CrystalReportViewer1.ParameterFieldInfo = ParamFields
Catch ex As Exception
Response.Write(ex.Message)
End Try

3.50/5 (2 votes)

Here is a Connect String for Oracle Xpress Edition

Habeeballah Hasnoddin

3:22 7 May '07

Hi, This is a great collection. I must appreciate the author for doing a great job.

Here is a Connect String for Oracle Xpress Edition

"Driver={Oracle in XE};"  
"Server=XE;"
"uid=scott;"
"pwd=tiger;"

Note:
==> The text found b'n braces for Driver can be seen when you launch odbcad32.exe and say Add....
Similarly for Oracle 8.0, the string would be
"Driver={Oracle ODBC Driver};"

==> The content of Server (XE) is the TNS Names entry created during the installation.

I tested the above data and it is working for me.

Habeeballah Hasnoddin

5.00/5 (1 vote)

Error while trying to connect to sybase database

micydon

21:27 9 Apr '07

Hi Sir,

I am using ASP.Net and vb as code behind.Earlier in our company we hve using powerbuilder and back end as Sybase SQL AnyWhere. Now we hve to connect to the same database thru Asp.Net. I am giving below the code that i hve used for connection

dim str as string
str = "ODBC;Driver=Sybase SQL Anywhere 5.0;Dbf=D:\mgc\mydb.db;"
str += "Uid=myuid;Pwd=mypwd;Dsn=mydb.db;"

Dim cn As New OdbcConnection(str)
Dim da As New OdbcDataAdapter("Select * from accounts", cn)
Dim dt As New DataSet
da.Fill(dt)
DataGrid1.DataSource = dt
DataGrid1.DataBind()

but i am getting the error as below
"ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified "

i didnt understand why this is happening .Can you please help me to correct this i hve downloaded microsoft. odbc provider too. I hve seen the provider for sybase SQl Anywhere in this site i didnt understand wht is defaultdir, and dbf pls help me

1.00/5 (1 vote)

Re: Error while trying to connect to sybase database

S Douglas

22:18 9 Apr '07

ConnectionStrings.com[^] Indicates your connection string is missing part of the string

ODBC;Driver=Sybase SQL Anywhere 5.0;DefaultDir=c:\dbfolder\;Dbf=c:\mydatabase.db;Uid=myUsername; Pwd=myPassword;Dsn="";

Important note!
The quota " in the string needs to be escaped using your language specific escape syntax.
c#, c++ \"
VB6, VBScript ""
xml (web.config etc) "
or maybe use a single quota '.
The empty DSN parameter is indeed critical as not including it will result in error 7778.

More info can be found here Read more in the Sybase SQL Anywhere User Guide (see part 3, chapter 13)[^]

Displaying more than 1 output

22teddy22

6:58 3 Apr '07

I want to display my database info in C#. I have:
string connectionString =
"DSN=mydsn;" +
"UID=db2;" +
"PWD=db4";
IDbConnection dbcon;
dbcon = new OdbcConnection(connectionString);
dbcon.Open();
IDbCommand dbcmd = dbcon.CreateCommand();

//connecting to the table info
string sql =
"SELECT p_id " +
"FROM table";

dbcmd.CommandText = sql;
IDataReader reader = dbcmd.ExecuteReader();
while (reader.Read())
{
string Identification = (string)reader["p_id"];
Console.WriteLine("Indentification: " + Identification);
TextBox1.Text = ("Identification:" + Identification);
}

How do I display more than 1 value. In this example, my output only shows the values for "p_id = 04". How do I make it show from p_id = 01 onwards?

Thanks for your time

1.00/5 (2 votes)

Related Website

Vasudevan Deepak Kumar

4:59 19 Mar '07

You may also like to check out http://www.connectionstrings.com/[^] Vasudevan Deepak Kumar Personal Homepage Tech Gossips
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connect to shared mdb file

hamid_m

23:26 13 Mar '07

Hi, i have an app that connect to a ms access database file (mdb) when i shared folder and run from other computer (in workgroup) it dosnt work and return error about permission!! how can i fix it? `private string constr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\\\\servername\\sharedfolder\\databasename.mdb; " + "User Id=admin; Password=;";`
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Switch Pooling OFF

markusschroth

4:12 27 Feb '07

I had some years ago the Problem with serveral ADO Connections on serveral SQL Servers in single encapsulated Threads. When one Connection was dropped, the other connections had problems and blocked too. Solution: Insert the following Text in the Connection String : Pooling=False;
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new

Thearith

23:24 25 Feb '07

hi friend. how are u to day
this your face when u meet sad with your girl friend
Frown

:->