Dataset updating multiple tables Ginga from chatrandom
Those methods perform the change tracking that's needed for updating the data source.
If you call the Remove At collection on the Rows property, the deletion won't be communicated back to the database. When you merge datasets, new records in the source dataset are added to the target dataset.
For the latest documentation on Visual Studio 2017, see Save data back to the database on docs. If you modify that data, it's a good practice to save those changes back to the database.
You do this in one of three ways: When you data bind dataset tables to controls on a Windows Form or XAML page, the data binding architecture does all the work for you.
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.
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If you do send the changes back to the database, then a second step is required.If you intend to update an underlying data source later, you must use the methods on the Data Table.Data Row Collection property when adding or removing rows.The Data Set contains Data Table Collection and their Data Relation Collection. The Data Table Collection contains zero or more Data Table objects.