IColumnMapping Interface
Associates a data source column with a DataSet column, and is implemented by the DataColumnMapping class, which is used in common by .NET Framework data providers.
For a list of all members of this type, see IColumnMapping Members.
[Visual Basic] Public Interface IColumnMapping [C#] public interface IColumnMapping [C++] public __gc __interface IColumnMapping [JScript] public interface IColumnMapping
Classes that Implement IColumnMapping
| Class | Description |
|---|---|
| DataColumnMapping | Contains a generic column mapping for an object that inherits from DataAdapter. This class cannot be inherited. |
Remarks
The IColumnMapping interface enables an inheriting class to implement a Column Mapping class, which associates a data source column with a DataSet column. For more information, see Setting Up DataTable and DataColumn Mappings.
An application does not create an instance of the IColumnMapping interface directly, but creates an instance of a class that inherits IColumnMapping.
Classes that inherit IColumnMapping must implement all inherited members, and typically define additional members to add provider-specific functionality. For example, the IColumnMapping interface defines the DataSetColumn property. In turn, the DataColumnMapping class inherits this property, and also defines the GetDataColumnBySchemaAction method.
Notes to Implementers: When you inherit from the IColumnMapping interface, you should implement the following constructors:
| Item | Description |
|---|---|
| ColumnMapping() | Initializes a new instance of the ColumnMapping class. |
| ColumnMapping(string sourceColumn, string dataSetColumn) | Initializes a new instance of the ColumnMapping class with a source with the specified source column name and DataSet column name. |
Example
[Visual Basic, C#, C++] The following example creates an instance of the derived class, DataColumnMapping, and adds it to a DataColumnMappingCollection collection. It then tells the user that the mapping was added to the collection and shows the parent for the mapping.
[Visual Basic] Public Sub AddDataColumnMapping() ' ... ' create myColumnMappings ' ... Dim myNewMapping As New DataColumnMapping("Description", "DataDescription") myColumnMappings.Add(CType(myNewMapping, Object)) MessageBox.Show("column " + myNewMapping.ToString() + " added to " _ + "column mapping collection " + myColumnMappings.ToString()) End Sub [C#] public void AddDataColumnMapping() { // ... // create myColumnMappings // ... DataColumnMapping myNewMapping = new DataColumnMapping("Description","DataDescription"); myColumnMappings.Add((Object) myNewMapping); MessageBox.Show("column " + myNewMapping.ToString() + " added to " + "column mapping collection " + myColumnMappings.ToString()); } [C++] void AddDataColumnMapping() { // ... // create myColumnMappings // ... DataColumnMapping* myNewMapping = new DataColumnMapping(S"Description",S"DataDescription"); myColumnMappings->Add(static_cast<Object*>(myNewMapping)); MessageBox::Show(String::Concat( S"column ", myNewMapping->ToString(), S" added to ", S"column mapping collection ", myColumnMappings->ToString() )); }
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button
in the upper-left corner of the page.
Requirements
Namespace: System.Data
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
Assembly: System.Data (in System.Data.dll)