DBConcurrency Exception: Concurrency violation: the Update Command affected 0 of the expected 1 records.
if you are trying to update a row that no longer exists in the database, the update from the Data Adapter will fail with the above exception.
the Command Builder creates a SQL statement that looks for a row which exactly matches all of the original values stored in the Data Set means the value of each and every column in the row is checked.
I was updating 2-3 columns of tables (having 20 columns) and expected to update those columns only. The UPDATE statement created by the Command Builder object uses the values stored in the copy of the Data Row with a Data Row Version value of Original to identify and update the appropriate row in the database.
Eventually, later versions were integrated with Microsoft Windows and Internet Explorer, and in MDAC 2.8 SP1 they ceased offering MDAC as a redistributable package.
There have been several deprecated components as well, such as the Microsoft Jet Database Engine, MSDASQL (the OLE DB provider for ODBC), and Remote Data Services (RDS).Answer 1: ADO stands for Active Data Object and ADO. For example, ODBC data providers work with ODBC data sources and Ole Db data providers work with OLE-DB data sources. NET components model and how they work together: See for more detail: Answer 3: A Data Set object falls in disconnected components series. The data provider components are specifically designed to work with different kinds of data sources.After that we create a Simple Cursor Adapter and attach that to cursor returned from our database custom query selection. The data columns returned from the cursor is then mapped to our custom view for display.