EntityConnection Class
Contains a reference to a conceptual model and a data source connection. This class cannot be inherited.
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
System.Data.Common.DbConnection
System.Data.EntityClient.EntityConnection
System.MarshalByRefObject
System.ComponentModel.Component
System.Data.Common.DbConnection
System.Data.EntityClient.EntityConnection
Assembly: System.Data.Entity (in System.Data.Entity.dll)
The EntityConnection type exposes the following members.
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EntityConnection() | Initializes a new instance of the EntityConnection class. |
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EntityConnection(String) | Initializes a new instance of the EntityConnection class, based on the connection string. |
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EntityConnection(MetadataWorkspace, DbConnection) | Initializes a new instance of the EntityConnection class with a specified MetadataWorkspace and DbConnection. |
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CanRaiseEvents | Gets a value indicating whether the component can raise an event. (Inherited from Component.) |
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ConnectionString | Gets or sets the EntityConnection connection string. (Overrides DbConnection.ConnectionString.) |
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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.) |
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Container | Gets the IContainer that contains the Component. (Inherited from Component.) |
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Database | Gets the name of the current database, or the database that will be used after a connection is opened. (Overrides DbConnection.Database.) |
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DataSource | Gets the name or network address of the data source to connect to. (Overrides DbConnection.DataSource.) |
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DbProviderFactory | Gets the DbProviderFactory for this DbConnection. (Inherited from DbConnection.) |
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DesignMode | Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component.) |
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Events | Gets the list of event handlers that are attached to this Component. (Inherited from Component.) |
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ServerVersion | Gets a string that contains the version of the data source to which the client is connected. (Overrides DbConnection.ServerVersion.) |
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Site | Gets or sets the ISite of the Component. (Inherited from Component.) |
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State | Gets the ConnectionState property of the underlying provider if the EntityConnection is open. Otherwise, returns Closed. (Overrides DbConnection.State.) |
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StoreConnection | Provides access to the underlying data source connection that is used by the EntityConnection object. |
| Name | Description | |
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BeginDbTransaction | Starts a database transaction. (Inherited from DbConnection.) |
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BeginTransaction() | Begins a transaction by using the underlying provider. |
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BeginTransaction(IsolationLevel) | Begins a transaction with the specified isolation level by using the underlying provider. |
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ChangeDatabase | Not supported. (Overrides DbConnection.ChangeDatabase(String).) |
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Close | Closes the connection to the database. (Overrides DbConnection.Close().) |
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CreateCommand | Creates a new instance of an EntityCommand, with the Connection set to this EntityConnection. |
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CreateDbCommand | Creates and returns a DbCommand object associated with the current connection. (Inherited from DbConnection.) |
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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.) |
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Dispose() | Releases all resources used by the Component. (Inherited from Component.) |
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Dispose(Boolean) | Releases the unmanaged resources used by the Component and optionally releases the managed resources. (Inherited from Component.) |
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EnlistTransaction | Enlists this EntityConnection in the specified transaction. (Overrides DbConnection.EnlistTransaction(Transaction).) |
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Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Finalize | Releases unmanaged resources and performs other cleanup operations before the Component is reclaimed by garbage collection. (Inherited from Component.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetLifetimeService | Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
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GetMetadataWorkspace | Returns the MetadataWorkspace associated with this EntityConnection. |
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GetSchema() | Returns schema information for the data source of this DbConnection. (Inherited from DbConnection.) |
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GetSchema(String) | Returns schema information for the data source of this DbConnection using the specified string for the schema name. (Inherited from DbConnection.) |
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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.) |
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GetService | Returns an object that represents a service provided by the Component or by its Container. (Inherited from Component.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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InitializeLifetimeService | Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
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MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object.) |
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MemberwiseClone(Boolean) | Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.) |
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OnStateChange | Raises the StateChange event. (Inherited from DbConnection.) |
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Open | Establishes a connection to the data source by calling the underlying data provider's Open method. (Overrides DbConnection.Open().) |
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ToString | Returns a String containing the name of the Component, if any. This method should not be overridden. (Inherited from Component.) |
| Name | Description | |
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Disposed | Occurs when the component is disposed by a call to the Dispose method. (Inherited from Component.) |
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StateChange | Occurs when the state of the event changes. (Inherited from DbConnection.) |
| Name | Description | |
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IDbConnection.BeginTransaction() | Begins a database transaction. (Inherited from DbConnection.) |
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IDbConnection.BeginTransaction(IsolationLevel) | Begins a database transaction with the specified IsolationLevel value. (Inherited from DbConnection.) |
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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, EntityConnection 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:
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The EntityConnection 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.
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The EntityConnection 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 EntityConnection verifies that the conceptual model, the storage model, and the mapping file are all present.
For code examples, see Working with EntityClient.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Poor Help
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- 10/21/2010
- André Steyn
