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EntityConnection Constructor

Initializes a new instance of the EntityConnection class.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

  NameDescription
Public method EntityConnection() Initializes a new instance of the EntityConnection class.
Public method EntityConnection(String) Initializes a new instance of the EntityConnection class, based on the connection string.
Public method EntityConnection(MetadataWorkspace, DbConnection) Initializes a new instance of the EntityConnection class with a specified MetadataWorkspace and DbConnection.
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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:

  • 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.

  • 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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