Validating data in datagridview

13-Mar-2020 08:49 by 8 Comments

Validating data in datagridview

If you're familiar with Table Adapters, you can jump directly to one of these topics: Updating a data source is a two-step process.The first step is to update the dataset with new records, changed records, or deleted records.

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For more information about suspending events, see Turn off constraints while filling a 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.

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.

Information about the changes in a dataset is maintained in two ways: by flagging rows that indicate that they have changed (Row State), and by keeping multiple copies of a record (Data Row Version).

By using this information, processes can determine what has changed in the dataset and can send appropriate updates to the data source.

Additionally, extra columns in the source dataset are added to the target dataset.

Merging datasets is useful when you have a local dataset and you get a second dataset from another application.

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.

This means that if you try to update the original data source with the target dataset, it might not be able to find the original row to update.