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Showing content from https://docs.microsoft.com/en-us/dotnet/api/system.data.common.dbconnection below:

DbConnection Class (System.Data.Common) | Microsoft Learn

Defines the core behavior of database connections and provides a base class for database-specific connections.

public ref class DbConnection abstract : IDisposable

public ref class DbConnection abstract : System::ComponentModel::Component, IAsyncDisposable, IDisposable, System::Data::IDbConnection

public ref class DbConnection abstract : IDisposable, System::Data::IDbConnection

public ref class DbConnection abstract : System::ComponentModel::Component, IDisposable, System::Data::IDbConnection

public ref class DbConnection abstract : System::ComponentModel::Component, System::Data::IDbConnection

public ref class DbConnection abstract : System::ComponentModel::Component, IAsyncDisposable, System::Data::IDbConnection

public abstract class DbConnection : IDisposable

public abstract class DbConnection : System.ComponentModel.Component, IAsyncDisposable, IDisposable, System.Data.IDbConnection

public abstract class DbConnection : IDisposable, System.Data.IDbConnection

public abstract class DbConnection : System.ComponentModel.Component, IDisposable, System.Data.IDbConnection

public abstract class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection

public abstract class DbConnection : System.ComponentModel.Component, IAsyncDisposable, System.Data.IDbConnection

type DbConnection = class
    interface IDisposable

type DbConnection = class
    inherit Component
    interface IDbConnection
    interface IDisposable
    interface IAsyncDisposable

type DbConnection = class
    interface IDbConnection
    interface IDisposable

type DbConnection = class
    inherit Component
    interface IDbConnection
    interface IDisposable

Public MustInherit Class DbConnection
Implements IDisposable

Public MustInherit Class DbConnection
Inherits Component
Implements IAsyncDisposable, IDbConnection, IDisposable

Public MustInherit Class DbConnection
Implements IDbConnection, IDisposable

Public MustInherit Class DbConnection
Inherits Component
Implements IDbConnection, IDisposable

Public MustInherit Class DbConnection
Inherits Component
Implements IDbConnection

Public MustInherit Class DbConnection
Inherits Component
Implements IAsyncDisposable, IDbConnection

Inheritance

Inheritance

Derived

Implements

When you inherit from DbConnection, you must override the following members: Close(), BeginDbTransaction(IsolationLevel), ChangeDatabase(String), CreateDbCommand(), Open(), and StateChange. You must also provide the following properties: ConnectionString, Database, DataSource, ServerVersion, and State.

When overridden in a derived class, starts a database transaction.

Asynchronously starts a database transaction.

Starts a database transaction.

Starts a database transaction with the specified isolation level.

Asynchronously begins a database transaction.

Asynchronously begins a database transaction.

When overridden in a derived class, changes the current database for an open connection.

Asynchronously changes the current database for an open connection.

When overridden in a derived class, closes the connection to the database.

Asynchronously closes the connection to the database.

Returns a new instance of the provider's class that implements the DbBatch class.

Creates and returns a DbCommand object associated with the current connection.

When overridden in a derived class, returns a new instance of the provider's class that implements the DbBatch class.

When overridden in a derived class, creates and returns a DbCommand object associated with the current connection.

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

Releases all resources used by the Component.

Releases the unmanaged resources used by the DbConnection and optionally releases the managed resources.

Releases the unmanaged resources used by the Component and optionally releases the managed resources.

Asynchronously disposes the connection object.

Enlists in the specified transaction.

Determines whether the specified object is equal to the current object.

Serves as the default hash function.

Obsolete.

Retrieves the current lifetime service object that controls the lifetime policy for this instance.

Returns schema information for the data source of this DbConnection.

Returns schema information for the data source of this DbConnection using the specified string for the schema name and the specified string array for the restriction values.

Returns schema information for the data source of this DbConnection using the specified string for the schema name.

This is an asynchronous version of GetSchema(). Providers should override with an appropriate implementation. The cancellationToken can optionally be honored. The default implementation invokes the synchronous GetSchema() call and returns a completed task. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by GetSchema() will be communicated via the returned Task Exception property.

This is the asynchronous version of GetSchema(String). Providers should override with an appropriate implementation. The cancellationToken can optionally be honored. The default implementation invokes the synchronous GetSchema(String) call and returns a completed task. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by GetSchema(String) will be communicated via the returned Task Exception property.

This is the asynchronous version of GetSchema(String, String[]). Providers should override with an appropriate implementation. The cancellationToken can optionally be honored. The default implementation invokes the synchronous GetSchema(String, String[]) call and returns a completed task. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by GetSchema(String, String[]) will be communicated via the returned Task Exception property.

Returns an object that represents a service provided by the Component or by its Container.

Gets the Type of the current instance.

Obsolete.

Obtains a lifetime service object to control the lifetime policy for this instance.

Creates a shallow copy of the current Object.

Creates a shallow copy of the current MarshalByRefObject object.

Raises the StateChange event.

When overridden in a derived class, opens a database connection with the settings specified by the ConnectionString.

An asynchronous version of Open(), which opens a database connection with the settings specified by the ConnectionString. This method invokes the virtual method OpenAsync(CancellationToken) with CancellationToken.None.

This is the asynchronous version of Open(). Providers should override with an appropriate implementation. The cancellation token can optionally be honored.

The default implementation invokes the synchronous Open() call and returns a completed task. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by Open will be communicated via the returned Task Exception property.

Do not invoke other methods and properties of the DbConnection object until the returned Task is complete.

Returns a string that represents the current object.

Returns a String containing the name of the Component, if any. This method should not be overridden.

• DbProviderFactories (ADO.NET)
• ADO.NET Overview

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