Contains a reference to a conceptual model and a data source connection. This class cannot be inherited.
public ref class EntityConnection sealed : System::Data::Common::DbConnectionpublic sealed class EntityConnection : System.Data.Common.DbConnectiontype EntityConnection = class
inherit DbConnectionPublic NotInheritable Class EntityConnection
Inherits DbConnectionTo 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:
The EntityConnection instance is constructed through the parameterless 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 Open or GetMetadataWorkspace locks the metadata.
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.
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