共用方式為

ObjectContext 建構函式 (String)

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[此頁面專屬於 Entity Framework 第 6 版。最新版本可從 'Entity Framework' NuGet 套件取得。如需 Entity Framework 的詳細資訊，請參閱 msdn.com/data/ef。]

使用給定的連接字串和預設實體容器名稱，初始化 ObjectContext 類別的新執行個體。

命名空間：  System.Data.Entity.Core.Objects
組件：  EntityFramework (在 EntityFramework.dll 中)

語法

'宣告
<SuppressMessageAttribute("Microsoft.Reliability", "CA2000:DisposeObjectsBeforeLosingScope", Justification := "Object is in fact passed to property of the class and gets Disposed properly in the Dispose() method.")> _
Public Sub New ( _
    connectionString As String _
)
'用途
Dim connectionString As String 

Dim instance As New ObjectContext(connectionString)

[SuppressMessageAttribute("Microsoft.Reliability", "CA2000:DisposeObjectsBeforeLosingScope", Justification = "Object is in fact passed to property of the class and gets Disposed properly in the Dispose() method.")]
public ObjectContext(
    string connectionString
)

[SuppressMessageAttribute(L"Microsoft.Reliability", L"CA2000:DisposeObjectsBeforeLosingScope", Justification = L"Object is in fact passed to property of the class and gets Disposed properly in the Dispose() method.")]
public:
ObjectContext(
    String^ connectionString
)

[<SuppressMessageAttribute("Microsoft.Reliability", "CA2000:DisposeObjectsBeforeLosingScope", Justification = "Object is in fact passed to property of the class and gets Disposed properly in the Dispose() method.")>]
new : 
        connectionString:string -> ObjectContext

public function ObjectContext(
    connectionString : String
)

參數

  • connectionString
    類型：System.String
    連接字串，它也會提供中繼資料資訊的存取權。

例外狀況

例外狀況 條件
ArgumentNullException

connectionString 是 null。
ArgumentException

connectionString 無效或中繼資料工作空間無效。

請參閱

參考

ObjectContext 類別

ObjectContext 多載

System.Data.Entity.Core.Objects 命名空間