AdoDotNetConnectionSupport Class

Artigo
10/02/2013

Provides a managed implementation of the DataConnectionSupport, DataCommand, and DataTransaction classes using the ADO.NET IDbConnection, IDbCommand, and IDbTransactioninterfaces, respectively; also provides a simple way to supply an implementation of the DataSourceVersionComparerclass.

Inheritance Hierarchy

System.Object
  Microsoft.VisualStudio.Data.ServiceProvider
    Microsoft.VisualStudio.Data.ServiceProviderWithSite
      Microsoft.VisualStudio.Data.DataConnectionSupport
        Microsoft.VisualStudio.Data.AdoDotNet.AdoDotNetConnectionSupport

Namespace: Microsoft.VisualStudio.Data.AdoDotNet
Assembly: Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)

Syntax

'Declaration
Public Class AdoDotNetConnectionSupport _
    Inherits DataConnectionSupport

public class AdoDotNetConnectionSupport : DataConnectionSupport

public ref class AdoDotNetConnectionSupport : public DataConnectionSupport

type AdoDotNetConnectionSupport =  
    class 
        inherit DataConnectionSupport 
    end

public class AdoDotNetConnectionSupport extends DataConnectionSupport

The AdoDotNetConnectionSupport type exposes the following members.

Constructors

	Name	Description
	AdoDotNetConnectionSupport	Class constructor. Initializes an instance of the AdoDotNetConnectionSupport class with a specified ADO.NET provider name.

Top

Properties

	Name	Description
	BaseCommand	Retrieves the main IDbCommand object being used for executing commands on this connection.
	Connection	Retrieves the IDbConnection object being used by the current connection support instance.
	ConnectionString	Retrieves or sets a string representation of information required to establish a specified data source connection. (Overrides DataConnectionSupport.ConnectionString.)
	ConnectionTimeout	Retrieves or sets the amount of time, in seconds, to wait to establish a connection before terminating the attempt and generating a timeout error. (Overrides DataConnectionSupport.ConnectionTimeout.)
	CurrentTransactionLevel	Retrieves the current transaction level.
	ExecutingCommand	Retrieves the IDbCommand instance currently being used for execution.
	PreparedCommands	Retrieves a list of IDbCommand objects that have been previously prepared.
	ProviderObject	Retrieves the underlying provider object for the specified connection. (Overrides DataConnectionSupport.ProviderObject.)
	ServiceTypes	Retrieves a list of service types used to convert the unmanaged QueryService method call, in which a service GUID is specified, into a managed IServiceProvider.GetService method call, in which a managed type is specified. (Inherited from ServiceProvider.)
	Site	Retrieves or sets the site object instance. (Inherited from ServiceProviderWithSite.)
	State	Retrieves the state of the data connection. (Overrides DataConnectionSupport.State.)
	Transaction	Retrieves the current IDbTransaction, if any.

Top

Methods

	Name	Description
	BeginTransaction	Initiates a transaction and returns the new current transaction level.
	Close	Closes the specified data connection. (Overrides DataConnectionSupport.Close().)
	CommitTransaction	Commits a transaction and returns the new current transaction level.
	CompareVersions	Compares two data-source version strings and returns a value indicating whether one is less than, equal to, or greater than the other.
	CreateDataSourceInformation	Creates a DataSourceInformation object instance.
	CreateObjectIdentifierConverter	Creates a DataObjectIdentifierConverter object instance.
	CreateObjectItemComparer	Creates a object instance.
	CreateParameter	Creates a DataParameter object.
	DeriveParameters	Derives parameters that can be specified for a given command
	DeriveSchema	Derives the schema returned from a specified command, indicating the layout of items and blocks in a given data reader.
	Dispose()	Performs tasks associated with freeing, releasing, or resetting resources. (Inherited from DataConnectionSupport.)
	Dispose(Boolean)	Releases all resources held by the data connection. (Overrides DataConnectionSupport.Dispose(Boolean).)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Execute	Executes a specified command, optionally with parameters, and returns results as a DataReader object.
	ExecuteWithoutResults	Executes a command, optionally with parameters, but does not request results, instead returning an integer indicating the outcome of the call.
	Finalize	Finalizes the connection. (Inherited from DataConnectionSupport.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetService(Guid)	Retrieves a service with a specified service GUID. (Inherited from ServiceProvider.)
	GetService(Type)	Retrieves a service of the specified type. (Inherited from ServiceProvider.)
	GetServiceImpl(Guid)	Provides the implementation for retrieving a service with a specific GUID. (Inherited from ServiceProvider.)
	GetServiceImpl(Type)	Enables retrieving implementation services. (Overrides DataConnectionSupport.GetServiceImpl(Type).)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Initialize	Initializes the specified ADO.NET connection using a specified provider. (Overrides DataConnectionSupport.Initialize(Object).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnSiteChanged	Raises the SiteChanged event. (Inherited from ServiceProviderWithSite.)
	Open	Opens the specified data connection. (Overrides DataConnectionSupport.Open(Boolean).)
	Prepare	Prepares the specified command on the data source to be executed; the command may be executed multiple times, with varying parameters.
	RaiseMessageReceived	Raises the MessageReceivedevent on the enclosing DataConnection instance. (Inherited from DataConnectionSupport.)
	RaiseStateChanged	Raises the state changed event on the enclosing DataConnection instance. (Inherited from DataConnectionSupport.)
	RollbackTransaction	Rolls back, or voids, a transaction and returns the new current transaction level.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Top

Events

	Name	Description
	SiteChanged	Event raised when the Site property has changed. (Inherited from ServiceProviderWithSite.)

Top

Explicit Interface Implementations

	Name	Description
	IObjectWithSite.GetSite	Retrieves the last site set using the IObjectWithSite.SetSite method. If there is no known site, an exception is thrown. (Inherited from ServiceProviderWithSite.)
	IServiceProvider.QueryService	Performs as a factory for services that are exposed through an implementation of IServiceProvider. (Inherited from ServiceProvider.)
	IObjectWithSite.SetSite	Provides a site's IUnknown pointer to a given object. (Inherited from ServiceProviderWithSite.)

Top

Remarks

This class provides a complete, managed implementation that is created by default for ADO.NET data providers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Compartilhar via