When using Update, the order of execution is as follows: Each command associated with the Db Data Adapter usually has a parameters collection associated with it.
If Source Column refers to a nonexistent column, the action taken depends on one of the following Missing Mapping Action values.For more information see Automatically Generated Commands.The Update method retrieves rows from the table listed in the first mapping before performing an update.To continue the update operation without generating an exception within the Row Updated event, set the Status property of the Row Updated Event Args to Continue.Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, . It should be noted that these statements are not performed as a batch process; each row is updated individually.
An application can call the Get Changes method in situations where you must control the sequence of statement types (for example, INSERTs before UPDATEs).
This capability is often used to include original values in the WHERE clause of an UPDATE statement to check for optimistic concurrency violations.
Note If an error occurs while updating a row, an exception is thrown and execution of the update is discontinued.
It perform the appropriate operation(Insert or Update or Delete).
Row State value can be : More you can get about these State from MSDN. Step 1: We have a Data Base Helper Class which have a function which return a Sql Data Adapter object of our datacollection Here I am writing SQL Query inside this function.
The Source Column property is also used to map the value for output or input/output parameters back to the Data Set.