Updating ms access database c
If you aren't using data binding, and are saving changes for related tables, you have to manually instantiate a variable of the auto-generated Table Adapter Manager class, and then call its Udpate All method.Two-stage update process and the role of the Data Row Version in a successful update A dataset contains collections of tables, which contain a collections of rows.It's also useful when you get a second dataset from a component such as an XML web service, or when you need to integrate data from multiple datasets.When merging datasets, you can pass a Boolean argument () that tells the Merge method whether to retain existing modifications in the target dataset.If your application never sends those changes back to the data source, then you are finished with the update.If you do send the changes back to the database, then a second step is required.Those methods perform the change tracking that's needed for updating the data source.
Merging datasets is useful when you have a local dataset and you get a second dataset from another application.
Or you might have application-specific validation checks that can raise custom errors during any stage of an update event.
For more information, see Validate data in datasets.
If you aren't using data-bound controls, then you have to manually call the Update method of the same Table Adapter (or data adapter) that you used to populate the dataset.
However, you can also use different adapters, for example, to move data from one data source to another or to update multiple data sources.