Understanding the Customization File

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11/18/2022

Each section header in the customization file consists of square brackets ([]) containing a type and parameter. The four section types are indicated by the literal strings connect, sql, userlist, or logs. The parameter is the literal string, the default, a user-specified identifier, or nothing.

Important

Beginning with Windows 8 and Windows Server 2012, RDS server components are no longer included in the Windows operating system (see Windows 8 and Windows Server 2012 Compatibility Cookbook for more detail). RDS client components will be removed in a future version of Windows. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Applications that use RDS should migrate to WCF Data Service.

Therefore, each section is marked with one of the following section headers:

  
[ connect default ] [ connect    
identifier   
] [ sql  default ] [ sql    
identifier   
] [ userlist    
identifier   
] [ logs ]

The section headers have the following parts.

Part	Description
connect	A literal string that modifies a connection string.
sql	A literal string that modifies a command string.
userlist	A literal string that modifies the access rights of a specific user.
logs	A literal string that specifies a log file recording operational errors.
default	A literal string that is used if no identifier is specified or found.
identifier	A string that matches a string in the connect or command string. - Use this section if the section header contains connect and the identifier string is found in the connection string. - Use this section if the section header contains sql and the identifier string is found in the command string. - Use this section if the section header contains userlist and the identifier string matches a connect section identifier.

The DataFactory calls the handler, passing client parameters. The handler searches for whole strings in the client parameters that match identifiers in the appropriate section headers. If a match is found, the contents of that section are applied to the client parameter.

A particular section is used under the following circumstances:

A connect section is used if the value part of the client connect string keyword, "Data Source=value", matches a connect section identifier.
An sql section is used if the client command string contains a string that matches an sql section identifier.
A connect or sql section with a default parameter is used if there is no matching identifier.
A userlist section is used if the userlist section identifier matches a connect section identifier. If there is a match, the contents of the userlist section are applied to the connection governed by the connect section.
If the string in a connection or command string does not match the identifier in any connect or sql section header, and there is no connect or sql section header with a default parameter, then the client string is used without modification.
The logs section is used whenever the DataFactory is in operation.

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Understanding the Customization File

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