Adds a DataColumn to the columns collection.
Creates and adds a DataColumn with the specified name and type to the columns collection.
[Visual Basic] Overloads Public Function Add(String, Type) As DataColumn
[C#] public DataColumn Add(String, Type);
[C++] public: DataColumn* Add(String*, Type);
[JScript] public function Add(String, Type) : DataColumn;
Creates and adds a DataColumn with the specified name, type, and compute expression to the columns collection.
[Visual Basic] Overloads Public Function Add(String, Type, String) As DataColumn
[C#] public DataColumn Add(String, Type, String);
[C++] public: DataColumn* Add(String*, Type, String*);
[JScript] public function Add(String, Type, String) : DataColumn;
Adds the specified DataColumn to the columns collection.
[Visual Basic] Overloads Public Sub Add(DataColumn)
[C#] public void Add(DataColumn);
[C++] public: void Add(DataColumn*);
[JScript] public function Add(DataColumn);
Creates and adds a DataColumn with the specified name and storage to the collection.
[Visual Basic] Overloads Public Function Add(String, DataStorage) As DataColumn
[C#] public DataColumn Add(String, DataStorage);
[C++] public: DataColumn* Add(String*, DataStorage);
[JScript] public function Add(String, DataStorage) : DataColumn;
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;
Creates and adds a DataColumn with the specified name to the columns collection.
[Visual Basic] Overloads Public Function Add(String) As DataColumn
[C#] public DataColumn Add(String);
[C++] public: DataColumn* Add(String*);
[JScript] public function Add(String) : DataColumn;
The following example creates and adds a new DataColumn to a ColumnsCollection of a DataTable.
Note This example shows how to use one of the overloaded versions of Add. For other examples that may be available, see the individual overload topics.
[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("Total") With myCol .DataType = System.Type.GetType("System.Currency") .ReadOnly = True .Expression = "UnitPrice * Quantity" .Unique = False End With End Sub
ColumnsCollection Class | ColumnsCollection Members | System.Data Namespace