May 2002
Beginner to intermediate
560 pages
11h 36m
English
Content preview from Essential ADO.NET
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5.7. How Update Works
Calling the DbDataAdapter.Update method triggers a series of steps to update the database with changes made to the object specified (DataTable, on a per-row basis). The sequence of events is as follows:
1. |
The values in the DataRow are moved to the parameter values.
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2. |
The OnRowUpdating event is raised.
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3. |
The command executes.
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4. |
If the command is set to FirstReturnedRecord, then the first returned result is placed in the DataRow.
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5. |
If there are output parameters, they are placed in the DataRow.
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6. |
The OnRowUpdated event is raised.
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7. |
AcceptChanges is called.
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5.7.1. Controlling Updates
The DataAdapter.Update method, when applied to a DataSet, applies inserts, updates, and deletes in a predefined order. Sometimes, ...
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