Creates and adds a DataColumn to a columns collection.
[Visual Basic] Overloads Public Function Add() As DataColumn [C#] public DataColumn Add(); [C++] public: DataColumn* Add(); [JScript] public function Add() : DataColumn;
The newly created DataColumn.
A default name ("Column1", "Column2", etc.) is given to the column.
The following example creates and adds a new DataColumn to a ColumnsCollection of a DataTable.
[Visual Basic]
Private Sub AddColumn() Dim cols As ColumnsCollection Dim myCol As DataColumn ' Get the ColumnsCollection from a table in a DataSet. cols = New DataSet1.Tables("Prices").Columns myCol = cols.Add() With myCol .DataType = System.Type.GetType("System.Currency") .ColumnName = "Total" .Expression = "UnitPrice * Quantity" .ReadOnly = True .Unique = False .Add(myCol) End With End Sub
ColumnsCollection Class | ColumnsCollection Members | System.Data Namespace | ColumnsCollection.Add Overload List | ColumnName | Contains | DataType | Expression