Difference between revisions of "Connection Strings"

Revision as of 18:05, 9 February 2014

Connection string examples.

ASP.Net

connection string examples for ASP.Net.

SQL Server (MSSQL)

SQL Server connection string examples.

Basic connection string

web.config:

<configuration>
  <connectionStrings> 
    <add name="SQLServerConnection" connectionString="Server=myServerName;
    Database=myDatabaseName;User Id=myUsername;Password=myPassword;" />
  </connectionStrings>
</configuration>

NOTE: Replace myServerName, myDatabaseName, myUsername, and myPassword with the correct details for your database.

How to create connection object in your code using the above connection string:

System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient(System.Configuration.ConfigurationManager.ConnectionStrings

["SQLServerConnection"].ConnectionString);

How to override default ASPNet Membership connection string

web.config:

<configuration>
  <connectionStrings>
    <remove name="LocalSQLServer" />
    <add name="LocalSQLServer" connectionString="Server=myServerName;Database=myDatabaseName;User Id=myUsername;Password=myPassword;" />
  </connectionStrings>
</configuration>

NOTE: Replace myServerName, myDatabaseName, myUsername, and myPassword with the correct details for your database. For overriding the default ASPNet Membership connection string, it is important that the connection string name be left as "LocalSQLServer".

MySQL

MySQL connection string example:

NOTE: This example requires the following library from mysql.com to be referenced in your project (also ensure that 'CopyLocal' is set to 'True' on the reference):

http://dev.mysql.com/downloads/connector/net/

web.config:

<configuration>
  <connectionStrings> 
    <add name="MySQLConnection" connectionString="Datasource=myServerName;Database=myDatabaseName;uid=myUsername;pwd=myPassword;" providerName="MySql.Data.MySqlClient"/>
  </connectionStrings>
</configuration>

NOTE: Replace myServerName, myDatabaseName, myUsername, and myPassword with the correct details for your database.

How to create connection object in your code using the above connection string:

MySql.Data.MySqlClient.MySqlConnection conn = new MySql.Data.MySqlClient.MySqlConnection(
   System.Configuration.ConfigurationManager.ConnectionStrings["MySQLConnection"].ConnectionString
);

Classic ASP

Connection string examples for classic ASP.

Access Database Connection String Examples

Using DSN-less method

Conn.Open "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=d:\home\mysite.com\db\myfile.mdb;"

Using DSN

Conn.Open "MyDSN"

Set Conn = CreateObject("ADODB.Connection")
Conn.Open "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=d:\home\mysite.com\db\myfile.mdb;"

MySQL Connection String (ASP)

For newer versions of MySQL, use the below code.

Dim conDB
Dim rs
'--Set the connection
Set conDB = CreateObject("ADODB.Connection")
'--You may need to use OPTION=3 instead of 16834
conDB.Open "DRIVER=MySQL ODBC 5.1 Driver;SERVER=mysql10.hostek.com;OPTION=16834;USER=db_un;Password=db_pw;DATABASE=db_name"
'--Set the recordset
Set rs = CreateObject("ADODB.Recordset")

For older MySQL versions, you will want to use the below code.

Dim conDB
Dim rs
'--Set the connection
Set conDB = CreateObject("ADODB.Connection")
'--You may need to use OPTION=3 instead of 16834
conDB.Open "DRIVER=MySQL ODBC 3.51 Driver;SERVER=mysql10.hostek.com;OPTION=16834;USER=db_un;Password=db_pw;DATABASE=db_name"
'--Set the recordset
Set rs = CreateObject("ADODB.Recordset")

MSSQL Connection String (ASP)

ConnStr="DRIVER={SQL
Server};SERVER=sql1.hostek.com;UID=db_username;PWD=db_password;DATABASE=db_name"
Conn.open ConnStr

Replace the username, password, and database name with the information for your database.