Valdating data in Dataset

• Validating data is the process of confirming that the values being entered into data objects conform to the constraints within a dataset's schema, as well as the rules established for your application.
• Validating data prior to sending updates to the underlying database is a good practice that reduces errors as well as the potential number of round trips between an application and the database.
• You can confirm that data being written to a dataset is valid by building validation checks into the dataset itself.
• The dataset can check the data no matter how the update is being performed — whether directly by controls in a form, within a component, or in some other way. Because the dataset is part of your application, it is a logical place to build application-specific validation (unlike building the same checks into the database backend).