Contains a reference to a conceptual model and a data source connection. This class cannot be inherited.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
Thetype exposes the following members.
|EntityConnection()||Initializes a new instance of the class.|
|EntityConnection(String)||Initializes a new instance of the class, based on the connection string.|
|EntityConnection(MetadataWorkspace, DbConnection)||Initializes a new instance of the class with a specified MetadataWorkspace and DbConnection.|
|ConnectionString||Gets or sets the connection string. (Overrides DbConnection.ConnectionString.)|
|ConnectionTimeout||Gets the number of seconds to wait when attempting to establish a connection before ending the attempt and generating an error. (Overrides DbConnection.ConnectionTimeout.)|
|Container||Gets the IContainer that contains the Component. (Inherited from Component.)|
|Database||Gets the name of the current database, or the database that will be used after a connection is opened. (Overrides DbConnection.Database.)|
|DataSource||Gets the name or network address of the data source to connect to. (Overrides DbConnection.DataSource.)|
|ServerVersion||Gets a string that contains the version of the data source to which the client is connected. (Overrides DbConnection.ServerVersion.)|
|Site||Gets or sets the ISite of the Component. (Inherited from Component.)|
|State||Gets the ConnectionState property of the underlying provider if the is open. Otherwise, returns Closed. (Overrides DbConnection.State.)|
|StoreConnection||Provides access to the underlying data source connection that is used by the object.|
|BeginTransaction()||Begins a transaction by using the underlying provider.|
|BeginTransaction(IsolationLevel)||Begins a transaction with the specified isolation level by using the underlying provider.|
|ChangeDatabase||Not supported. (Overrides DbConnection.ChangeDatabase(String).)|
|Close||Closes the connection to the database. (Overrides DbConnection.Close().)|
|CreateCommand||Creates a new instance of an EntityCommand, with the Connection set to this .|
|CreateObjRef||Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)|
|Dispose()||Releases all resources used by the Component. (Inherited from Component.)|
|EnlistTransaction||Enlists this in the specified transaction. (Overrides DbConnection.EnlistTransaction(Transaction).)|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetLifetimeService||Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)|
|GetMetadataWorkspace||Returns the MetadataWorkspace associated with this .|
|GetSchema()||Returns schema information for the data source of this DbConnection. (Inherited from DbConnection.)|
|GetSchema(String)||Returns schema information for the data source of this DbConnection using the specified string for the schema name. (Inherited from DbConnection.)|
|GetSchema(String, String)||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. (Inherited from DbConnection.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|InitializeLifetimeService||Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)|
|Open||Establishes a connection to the data source by calling the underlying data provider's Open method. (Overrides DbConnection.Open().)|
|OpenAsync()||An asynchronous version of Open, which opens a database connection with the settings specified by the ConnectionString. This method invokes the virtual method OpenAsync with CancellationToken.None. (Inherited from DbConnection.)|
|OpenAsync(CancellationToken)||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. (Inherited from DbConnection.)|
|ToString||Returns a String containing the name of the Component, if any. This method should not be overridden. (Inherited from Component.)|
|IDbConnection.BeginTransaction()||Begins a database transaction. (Inherited from DbConnection.)|
|IDbConnection.BeginTransaction(IsolationLevel)||Begins a database transaction with the specified IsolationLevel value. (Inherited from DbConnection.)|
|IDbConnection.CreateCommand||Creates and returns a DbCommand object that is associated with the current connection. (Inherited from DbConnection.)|
To avoid inadvertently putting objects such as System.Data.Common.CommandTrees and ObjectContext out of sync with their metadata, must lock its metadata. No changes to the connection string are allowed after the metadata is locked. The following are two scenarios in which metadata is locked:
The instance is constructed through the default constructor, or through the EntityConnection(String) constructor, which accepts a connection string. In either case the connection string might be changed multiple times before the connection is opened. Calling [M:System.Data.EntityClient.EntityConnection.Open()] or [M:System.Data.EntityClient.EntityConnection.GetMetadataWorkspace()] locks the metadata.
The instance is constructed through the EntityConnection(MetadataWorkspace, DbConnection) constructor, which accepts a MetadataWorkspace and a DbConnection. In this case, the metadata is locked at construction time. No changes to the connection string are ever allowed.
When metadata is loaded, the verifies that the conceptual model, the storage model, and the mapping file are all present.
For code examples, see Working with EntityClient.