Creating AutoIncrement Columns
To ensure unique column values, you can set the column values to increment automatically when new rows are added to the table. To create an auto-incrementing, set the property of the column to true. The DataColumn then starts with the value defined in the property, and with each row added the value of the AutoIncrement column increases by the value defined in the property of the column.
For AutoIncrement columns, we recommend that theproperty of the DataColumn be set to true.
The following example demonstrates how to create a column that starts with a value of 200 and adds incrementally in steps of 3.
DataColumn workColumn = workTable.Columns.Add( "CustomerID", typeof(Int32)); workColumn.AutoIncrement = true; workColumn.AutoIncrementSeed = 200; workColumn.AutoIncrementStep = 3;