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ObjectContext Constructor (String)

Initializes a new instance of the ObjectContext class with the given connection string and default entity container name.

Namespace:  System.Data.Objects
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

new : 
        connectionString:string -> ObjectContext

Parameters

connectionString
Type: System.String
The connection string, which also provides access to the metadata information.

ExceptionCondition
ArgumentNullException

The connectionString is a null reference (Nothing in Visual Basic).

ArgumentException

The connectionString is invalid.

-or-

The metadata workspace is not valid.

The connectionString is a string that contains information that is required to access a conceptual model and to connect to a data source. The EntityConnectionStringBuilder class can be used to correctly format the string.

The Entity Data Model tools generate a named connection string that is stored in the application's configuration file. This named connection string can be supplied instead of the connectionString parameter when instantiating the ObjectContext class.

The example in this topic is based on the Adventure Works Sales Model. The example shows how to construct an ObjectContext.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5 SP1

.NET Framework Client Profile

Supported in: 4

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.

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