System.Data.Common.DataColumnMapping.GetDataColumnBySchemaAction C# (CSharp) Method

        public DataColumn GetDataColumnBySchemaAction(DataTable dataTable, Type dataType, MissingSchemaAction schemaAction)
        {
            return GetDataColumnBySchemaAction(SourceColumn, DataSetColumn, dataTable, dataType, schemaAction);
        }

        public static DataColumn GetDataColumn(DataColumnMappingCollection columnMappings, string sourceColumn, Type dataType, DataTable dataTable, MissingMappingAction mappingAction, MissingSchemaAction schemaAction)
        {
            if (columnMappings != null)
            {
                int index = columnMappings.IndexOf(sourceColumn);
                if (-1 != index)
                {
                    return(columnMappings.items[index].GetDataColumnBySchemaAction(dataTable, dataType, schemaAction));
                }
            }
            if (ADP.IsEmpty(sourceColumn))
            {
                throw ADP.InvalidSourceColumn("sourceColumn");
            }
            switch (mappingAction)
            {
            case MissingMappingAction.Passthrough:
                return(DataColumnMapping.GetDataColumnBySchemaAction(sourceColumn, sourceColumn, dataTable, dataType, schemaAction));

            case MissingMappingAction.Ignore:
                return(null);

            case MissingMappingAction.Error:
                throw ADP.MissingColumnMapping(sourceColumn);
            }
            throw ADP.InvalidMissingMappingAction(mappingAction);
        }