Upgrading to DataFlex 3.2: Difference between revisions
Code
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Creating a new record: | Creating a new record: | ||
<source lang="vdf"> | |||
clear NEWFILE | clear NEWFILE | ||
lock | lock | ||
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saverecord NEWFILE | saverecord NEWFILE | ||
unlock | unlock | ||
</source> | |||
Note: In many instances a reread command instead of a lock command will work with a new record. In this case, you MUST use the reread command without any files listed as parameters. If you try to reread a specific file (e.g. reread CUSTOMER) which does not have an active record, you will get an error "status <<25>> record not found". There is a slight penalty (time) for using the reread command without any parameters, which is that all open files with an active record that are not flagged read-only will be reread. | Note: In many instances a reread command instead of a lock command will work with a new record. In this case, you MUST use the reread command without any files listed as parameters. If you try to reread a specific file (e.g. reread CUSTOMER) which does not have an active record, you will get an error "status <<25>> record not found". There is a slight penalty (time) for using the reread command without any parameters, which is that all open files with an active record that are not flagged read-only will be reread. | ||
Editing an existing record: | Editing an existing record: | ||
<source lang="vdf"> | |||
reread FILE | reread FILE | ||
move VAR to FILE.FIELD | move VAR to FILE.FIELD | ||
saverecord FILE | saverecord FILE | ||
unlock | unlock | ||
</source> | |||
Copying data from an existing record in FILE to a new record in NEWFILE: | Copying data from an existing record in FILE to a new record in NEWFILE: | ||
<source lang="vdf"> | |||
reread FILE | reread FILE | ||
move FILE.FIELD to NEWFILE.FIELD | move FILE.FIELD to NEWFILE.FIELD | ||
saverecord NEWFILE | saverecord NEWFILE | ||
unlock | unlock | ||
</source> | |||
Explanation of terms: | |||
* | *NEWFILE is a data file where a new record is being created | ||
*FILE is a data file with an existing record | |||
*VAR is a variable in the program code | |||
Note: There are important differences between the saverecord and save commands. The difference is that the save command attaches related ancestral file (parent, grandparent, etc) information, so that information from the related parent record will overwrite information moved manually into the child record buffer when saving. Saverecord does not do anything at all with related files, it only affects the file(s) listed as parameter(s). | Note: There are important differences between the saverecord and save commands. The difference is that the save command attaches related ancestral file (parent, grandparent, etc) information, so that information from the related parent record will overwrite information moved manually into the child record buffer when saving. Saverecord does not do anything at all with related files, it only affects the file(s) listed as parameter(s). | ||