DataColumnCollection::Add Method ()
.NET Framework (current version)
Creates and adds a DataColumn object to the DataColumnCollection.
Assembly: System.Data (in System.Data.dll)
A default name ("Column1", "Column2", and so on) is given to the column.
If the collection is successfully changed by adding or removing columns, the CollectionChanged event occurs.
The following example creates and adds a new DataColumn to the DataColumnCollection of a DataTable.
Private Sub AddColumn() ' Get the DataColumnCollection from a table in a DataSet. Dim columns As DataColumnCollection = _ DataSet1.Tables("Prices").Columns Dim column As DataColumn = columns.Add() With column .DataType = System.Type.GetType("System.Decimal") .ColumnName = "Total" .Expression = "UnitPrice * Quantity" .ReadOnly = True .Unique = False End With End Sub
.NET Framework
Available since 1.1
Available since 1.1
Show: