System.Data.Common Namespace

The System.Data.Common namespace contains classes shared by the .NET Framework data providers.

Remarks

A .NET Framework data provider describes a collection of classes used to access a data source, such as a database, in the managed space. Supported providers include the .NET Framework Data Provider for ODBC, the .NET Framework Data Provider for OLEDB, the .NET Framework Data Provider for Oracle, and the .NET Framework Data Provider for SQL Server. The classes in System.Data.Common are intended to give developers a way to write ADO.NET code that will work against all .NET Framework data providers.

For conceptual information about how to use this namespace when programming with the.NET Framework, see Writing Provider Independent Code with ADO.NET.

Classes

TypeReason
CatalogLocation

Indicates the position of the catalog name in a qualified table name in a text command.

DataAdapter

Represents a set of SQL commands and a database connection that are used to fill the DataSet and update the data source.

DataColumnMapping

Contains a generic column mapping for an object that inherits from DataAdapter. This class cannot be inherited.

DataColumnMappingCollection

Contains a collection of DataColumnMapping objects.

DataTableMapping

Contains a description of a mapped relationship between a source table and a DataTable. This class is used by a DataAdapter when populating a DataSet.

DataTableMappingCollection

A collection of DataTableMapping objects. This class cannot be inherited.

DbCommand

Represents an SQL statement or stored procedure to execute against a data source. Provides a base class for database-specific classes that represent commands. erload:System.Data.Common.DbCommand.ExecuteNonQueryAsync

DbCommandBuilder

Automatically generates single-table commands used to reconcile changes made to a DataSet with the associated database. This is an abstract class that can only be inherited.

DbConnection

Represents a connection to a database.

DbConnectionStringBuilder

Provides a base class for strongly typed connection string builders.

DbDataAdapter

Aids implementation of the IDbDataAdapter interface. Inheritors of DbDataAdapter implement a set of functions to provide strong typing, but inherit most of the functionality needed to fully implement a DataAdapter.

DBDataPermission

Enables a .NET Framework data provider to help ensure that a user has a security level adequate for accessing data.

DBDataPermissionAttribute

Associates a security action with a custom security attribute.

DbDataReader

Reads a forward-only stream of rows from a data source.

DbDataRecord

Implements IDataRecord and ICustomTypeDescriptor, and provides data binding support for DbEnumerator.

DbDataSourceEnumerator

Provides a mechanism for enumerating all available instances of database servers within the local network.

DbEnumerator

Exposes the IEnumerable.GetEnumerator method, which supports a simple iteration over a collection by a .NET Framework data provider.

DbException

The base class for all exceptions thrown on behalf of the data source.

DbMetaDataCollectionNames

Provides a list of constants for the well-known MetaDataCollections: DataSourceInformation, DataTypes, MetaDataCollections, ReservedWords, and Restrictions.

DbMetaDataColumnNames

Provides static values that are used for the column names in the MetaDataCollection objects contained in the DataTable. The DataTable is created by the GetSchema method.

DbParameter

Represents a parameter to a DbCommand and optionally, its mapping to a DataSet column. For more information on parameters, see Configuring Parameters and Parameter Data Types (ADO.NET).

DbParameterCollection

The base class for a collection of parameters relevant to a DbCommand.

DbProviderConfigurationHandler

This class can be used by any provider to support a provider-specific configuration section.

DbProviderFactories

Represents a set of static methods for creating one or more instances of DbProviderFactory classes.

DbProviderFactoriesConfigurationHandler

This type supports the .NET Framework infrastructure and is not intended to be used directly from your code.

DbProviderFactory

Represents a set of methods for creating instances of a provider's implementation of the data source classes.

DbProviderSpecificTypePropertyAttribute

Identifies which provider-specific property in the strongly typed parameter classes is to be used when setting a provider-specific type.

DbTransaction

The base class for a transaction.

GroupByBehavior

Specifies the relationship between the columns in a GROUP BY clause and the non-aggregated columns in the select-list of a SELECT statement.

IdentifierCase

Specifies how identifiers are treated by the data source when searching the system catalog.

RowUpdatedEventArgs

Provides data for the RowUpdated event of a .NET Framework data provider.

RowUpdatingEventArgs

Provides the data for the RowUpdating event of a .NET Framework data provider.

SchemaTableColumn

Describes the column metadata of the schema for a database table.

SchemaTableOptionalColumn

Describes optional column metadata of the schema for a database table.

SupportedJoinOperators

Specifies what types of Transact-SQL join statements are supported by the data source.