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DataColumnCollection.Add Method (DataColumn)

.NET Framework 1.1

Creates and adds the specified DataColumn object to the DataColumnCollection.

[Visual Basic]
Overloads Public Sub Add( _
   ByVal column As DataColumn _
)
[C#]
public void Add(
 DataColumn column
);
[C++]
public: void Add(
 DataColumn* column
);
[JScript]
public function Add(
   column : DataColumn
);

Parameters

column
The DataColumn to add.

Exceptions

Exception Type Condition
ArgumentNullException The column parameter is a null reference (Nothing in Visual Basic).
ArgumentException The column already belongs to this collection, or to another collection.
DuplicateNameException The collection already has a column with the specified name. (The comparison is not case-sensitive.)
InvalidExpressionException The expression is invalid. See the Expression property for details on creating expressions.

Remarks

If the collection is successfully changed by adding or removing columns, the CollectionChanged event occurs.

Example

[Visual Basic] The following example adds a DataColumn to a DataColumnCollection.

[Visual Basic] 
Private Sub AddDataColumn()
    ' Get the DataColumnCollection from a DataTable in a DataSet.
    Dim cols As DataColumnCollection = DataSet1.Tables("Orders").Columns
 
    Dim myCol As DataColumn = New DataColumn
    With myCol
       .DataType = System.Type.GetType("System.Decimal")
       .ColumnName = "ItemPrice"
       .Caption = "Price"
       .ReadOnly = False
       .Unique = False
       .DefaultValue = 0
    End With
    
    cols.Add(myCol)
 End Sub

[C#, C++, JScript] No example is available for C#, C++, or JScript. To view a Visual Basic example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

See Also

DataColumnCollection Class | DataColumnCollection Members | System.Data Namespace | DataColumnCollection.Add Overload List | ColumnName | CollectionChanged | Contains | DataType | Expression

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