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SQLConfigDataSource Function

  • Artikkeli

Conformance
Version Introduced: ODBC 1.0

Summary
SQLConfigDataSource adds, modifies, or deletes data sources.

The functionality of SQLConfigDataSource can also be accessed with ODBCCONF.EXE.

Syntax

  
BOOL SQLConfigDataSource(  
     HWND     hwndParent,  
     WORD     fRequest,  
     LPCSTR   lpszDriver,  
     LPCSTR   lpszAttributes);

Arguments

hwndParent
[Input] Parent window handle. The function will not display any dialog boxes if the handle is null.

fRequest
[Input] Type of request. The fRequest argument must contain one of the following values:

ODBC_ADD_DSN: Add a new user data source.

ODBC_CONFIG_DSN: Configure (modify) an existing user data source.

ODBC_REMOVE_DSN: Remove an existing user data source.

ODBC_ADD_SYS_DSN: Add a new system data source.

ODBC_CONFIG_SYS_DSN: Modify an existing system data source.

ODBC_REMOVE_SYS_DSN: Remove an existing system data source.

ODBC_REMOVE_DEFAULT_DSN: Remove the default data source specification section from the system information. (It also removes the default driver specification section from the Odbcinst.ini entry in the system information. This fRequest performs the same function as the deprecated SQLRemoveDefaultDataSource function.) When this option is specified, all of the other parameters in the call to SQLConfigDataSource should be NULLs; if they are not NULL, they will be ignored.

lpszDriver
[Input] Driver description (usually the name of the associated DBMS) presented to users instead of the physical driver name.

lpszAttributes
[Input] A doubly null-terminated list of attributes in the form of keyword-value pairs. For more information, see ConfigDSN.

Returns

The function returns TRUE if it is successful, FALSE if it fails. If no entry exists in the system information when this function is called, the function returns FALSE.

Diagnostics

When SQLConfigDataSource returns FALSE, an associated *pfErrorCode value can be obtained by calling SQLInstallerError. The following table lists the *pfErrorCode values that can be returned by SQLInstallerError and explains each one in the context of this function.

*pfErrorCode Error Description
ODBC_ERROR_GENERAL_ERR General installer error An error occurred for which there was no specific installer error.
ODBC_ERROR_INVALID_HWND Invalid window handle The hwndParent argument was invalid or NULL.
ODBC_ERROR_INVALID_REQUEST_TYPE Invalid type of request The fRequest argument was not one of the following:

ODBC_ADD_DSN ODBC_CONFIG_DSN ODBC_REMOVE_DSN ODBC_ADD_SYS_DSN ODBC_CONFIG_SYS_DSN ODBC_REMOVE_SYS_DSN ODBC_REMOVE_DEFAULT_DSN
ODBC_ERROR_INVALID_NAME Invalid driver or translator name The lpszDriver argument was invalid. It could not be found in the registry.
ODBC_ERROR_INVALID_KEYWORD_VALUE Invalid keyword-value pairs The lpszAttributes argument contained a syntax error.
ODBC_ERROR_REQUEST_FAILED Request failed The installer could not perform the operation requested by the fRequest argument. The call to ConfigDSN failed.
ODBC_ERROR_LOAD_LIBRARY_FAILED Could not load the driver or translator setup library The driver setup library could not be loaded.
ODBC_ERROR_OUT_OF_MEM Out of memory The installer could not perform the function because of a lack of memory.

Comments

SQLConfigDataSource uses the value of lpszDriver to read the full path of the setup DLL for the driver from the system information. It loads the DLL and calls ConfigDSN with the same arguments that were passed to it.

SQLConfigDataSource returns FALSE if it is unable to find or load the setup DLL or if the user cancels the dialog box. Otherwise, it returns the status it received from ConfigDSN.

SQLConfigDataSource maps the System DSN fRequests to the User DSN fRequests (ODBC_ADD_SYS_DSN to ODBC_ADD_DSN, ODBC_CONFIG_SYS_DSN to ODBC_CONFIG_DSN, and ODBC_REMOVE_SYS_DSN to ODBC_REMOVE_DSN). To distinguish user and System DSNs, SQLConfigDataSource sets the installer configuration mode according to the following table. Prior to returning, SQLConfigDataSource resets configuration mode to BOTHDSN. ConfigDSN (implemented by drivers) should call SQLWriteDSNToIni and SQLWritePrivateProfileString to support a system DSN. For more information, see ConfigDSN Function.

fRequest Configuration mode
ODBC_ADD_DSN USERDSN_ONLY
ODBC_CONFIG_DSN USERDSN_ONLY
ODBC_REMOVE_DSN USERDSN_ONLY
ODBC_ADD_SYS_DSN SYSTEMDSN_ONLY
ODBC_CONFIG_SYS_DSN SYSTEMDSN_ONLY
ODBC_REMOVE_SYS_DSN SYSTEMDSN_ONLY
For information about See
Adding, modifying, or removing a data source ConfigDSN (in the setup DLL)
Removing a data source name from the system information SQLRemoveDSNFromIni
Adding a data source name to the system information SQLWriteDSNToIni