DataColumnCollection::Add Method (DataColumn^)
.NET Framework (current version)
Creates and adds the specified DataColumn object to the DataColumnCollection.
Assembly: System.Data (in System.Data.dll)
Parameters
- column
-
Type:
System.Data::DataColumn^
The DataColumn to add.
| Exception | Condition |
|---|---|
| ArgumentNullException | The column parameter is null. |
| 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 more information about how to create expressions. |
If the collection is successfully changed by adding or removing columns, the CollectionChanged event occurs.
The following example adds a DataColumn to a DataColumnCollection.
Private Sub AddDataColumn() ' Get the DataColumnCollection from a DataTable in a DataSet. Dim columns As DataColumnCollection = _ DataSet1.Tables("Orders").Columns Dim column As DataColumn = New DataColumn With column .DataType = System.Type.GetType("System.Decimal") .ColumnName = "ItemPrice" .Caption = "Price" .ReadOnly = False .Unique = False .DefaultValue = 0 End With columns.Add(column) End Sub
.NET Framework
Available since 1.1
Available since 1.1
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