Updating the database www increaseyourdating com


12-Oct-2018 01:29

(A concurrency violation occurs when another user modifies a record in the data source after the dataset has been filled.)To make changes to an existing data row, add or update data in the individual columns.

If the dataset contains constraints (such as foreign keys or non-nullable constraints), it's possible that the record can temporarily be in an error state as you update it.

After you complete an update, you can re-enable constraint checking, which also re-enables update events and raises them.

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

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.

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

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.

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.

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