ADO ConnectionString

The ADO ConnectionString ( contains all necessary parameters needed by the ADO Connection object for database connection via the selected ADO Provider. The typical parameters are represented for example by connection provider (provider), server address (server), database name (database), login name and password (uid, pwd), etc. The parameter list and exact syntax is defined by the corresponding ADO Provider, parameters may differ by individual ADO Providers. However for the sake of compatibility most providers ADO Provider understand multiple names of the main parameters simultaneously (e.g. the database name can be represented by database, data source, dbq, etc.).
Caution: The syntax of this string is different than other strings used in the PROMOTIC system, the value and the name are separated by =, not by "colon" (:). Entries with assigned value are separated by a semicolon, for example "provider=SQLOLEDB;server=.\SQLEXPRESS;database=pm_data;uid=pm_admin;pwd=pmadmin;".
Configuration items:
The defined parameters may not always be valid (for most common cases), it depends on the selected ADO Provider.
"provider:xxx;" (optional) - Defines which ADO Provider will be used for database connection. It can be the Microsoft company ADO Provider, or another ADO Provider can be used, e.g. "provider=MSDASQL;"
MSDASQL (default) - Microsoft provider for ODBC.
SQLOLEDB - Microsoft provider for MS SQL Server.
Microsoft.Jet.OLEDB.4.0 - Microsoft provider for Access (*.MDB).
"server=xxx;" (optional) - SQL server name, that holds the database to connect to. Depends on the SQL server type. The name usually consists of the computer name (IP address) and server instance name, separated by separator character, for example "server=.\SQLEXPRESS;".
"database=xxx;" (optional) - Database name, e.g. "database=pm_data;".
"dsn=xxx;" (optional) - Name of registered ODBC DSN source. In such case, there is no need to enter the server, database or driver, because all thise information is defined in the registered DSN source, for example dsn=pm_data;.
"driver=xxx;" (optional) - Name of ODBC driver, e.g. driver={Microsoft dBASE Driver (*.dbf)};.
"uid=xxx;" (optional) - User name to be used for database connection, e.g. uid=pm_admin;.
"pwd=xxx;" (optional) - User password, e.g. pwd=pmadmin;.
PROMOTIC 8.3.19 SCADA system documentation - MICROSYS, spol. s r.o.

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