set_dsn
Description:
Changes the information displayed in this, to represent dsn.
If this's mode has gda_ui_login_hide_dsn_selection_mode, then the DSN information is extracted and displayed in the direct login area.
If dsn is not a declared data source name, then a warning is shown and the result is the same as having passed
null for the dsn argument.
In any case this's mode (set by set_mode ) is not changed.
Parameters:
| this |
a Login object |
| dsn |
a data source name, or null |