DataTableMappingCollection.GetTableMappingBySchemaAction Method

Definition

Namespace:

System.Data.Common

Assembly:

System.Data.Common.dll

Source:

DataTableMappingCollection.cs

Gets a DataColumnMapping object with the specified source table name and DataSet table name, using the given MissingMappingAction.

public:
 static System::Data::Common::DataTableMapping ^ GetTableMappingBySchemaAction(System::Data::Common::DataTableMappingCollection ^ tableMappings, System::String ^ sourceTable, System::String ^ dataSetTable, System::Data::MissingMappingAction mappingAction);

public static System.Data.Common.DataTableMapping? GetTableMappingBySchemaAction (System.Data.Common.DataTableMappingCollection? tableMappings, string sourceTable, string dataSetTable, System.Data.MissingMappingAction mappingAction);

static member GetTableMappingBySchemaAction : System.Data.Common.DataTableMappingCollection * string * string * System.Data.MissingMappingAction -> System.Data.Common.DataTableMapping

Public Shared Function GetTableMappingBySchemaAction (tableMappings As DataTableMappingCollection, sourceTable As String, dataSetTable As String, mappingAction As MissingMappingAction) As DataTableMapping

Parameters

tableMappings

DataTableMappingCollection

The DataTableMappingCollection collection to search.

sourceTable

String

The case-sensitive name of the mapped source table.

dataSetTable

String

The name, which is not case-sensitive, of the mapped DataSet table.

mappingAction

MissingMappingAction

One of the MissingMappingAction values.

Returns

DataTableMapping

A DataTableMapping object.

Exceptions

InvalidOperationException

The mappingAction parameter was set to Error, and no mapping was specified.

Examples

The following example searches for a DataTableMapping with the given source table name within the collection. If the object exists, it is returned. The example assumes that a DataTableMappingCollection collection and a DataTableMapping object have been created.

public void FindDataTableMapping()
{
    // ...
    // create mappings and mapping
    // ...
    if (mappings.Contains("Categories"))
    {
        mapping = DataTableMappingCollection.GetTableMappingBySchemaAction
            (mappings, "Categories", "", MissingMappingAction.Ignore);
    }
}

Public Sub FindDataTableMapping()
    ' ...
    ' create mappings and mapping
    ' ...
    If mappings.Contains("Categories") Then
        mapping = _
           DataTableMappingCollection.GetTableMappingBySchemaAction _
           (mappings, "Categories", "", MissingMappingAction.Ignore)
    End If
End Sub

Remarks

If the DataTableMapping exists in the collection, it is returned.

If the DataTableMapping does not exist in the collection for a given MissingMappingAction, the following happens:

MissingMappingAction	Action taken
Passthrough	Creates a DataTableMapping object with the given sourceTable as the source table name and dataSetTable as the DataSet table name. The created DataTableMapping object is not added to the collection.
Error	An exception is generated. The dataSetTable parameter is ignored.
Ignore	Gets null. The dataSetTable parameter is ignored.