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Updating database with datagrid in

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.That is, it can be in an error state after you finish updating one column but before you get to the next one.To prevent premature constraint violations you can temporarily suspend update constraints.When the merge is complete, if there are any constraints on the dataset that cannot be enabled, a Constraint Exception is thrown.In this situation, the Enforce Constraints property is set to .Those methods perform the change tracking that's needed for updating the data source.

You can prevent a concurrency violation by filling another dataset with the updated records from the data source and then performing a merge to prevent a concurrency violation.Because datasets maintain multiple versions of records, it's important to keep in mind that more than one version of the records is being merged.The following table shows how a record in two datasets is merged: dataset.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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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).