EntityConnection 建構函式 (MetadataWorkspace, DbConnection)
[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。]
使用指定的 MetadataWorkspace 和 DbConnection，初始化 EntityConnection 類別的新執行個體。
命名空間： System.Data.Entity.Core.EntityClient
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 ( _
workspace As MetadataWorkspace, _
connection As DbConnection _
)
'用途
Dim workspace As MetadataWorkspace
Dim connection As DbConnection
Dim instance As New EntityConnection(workspace, _
connection)
[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 EntityConnection(
MetadataWorkspace workspace,
DbConnection connection
)
[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:
EntityConnection(
MetadataWorkspace^ workspace,
DbConnection^ connection
)
[<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 :
workspace:MetadataWorkspace *
connection:DbConnection -> EntityConnection
public function EntityConnection(
workspace : MetadataWorkspace,
connection : DbConnection
)
參數
- workspace
類型：System.Data.Entity.Core.Metadata.Edm.MetadataWorkspace
與此 EntityConnection 相關聯的 MetadataWorkspace。
- connection
類型：System.Data.Common.DbConnection
此 EntityConnection 物件的基礎資料來源連接。
例外狀況
| 例外狀況 | 條件 |
|---|---|
| ArgumentNullException | workspace 或 connection 參數為 null。 |
| ArgumentException | 工作空間中遺漏概念模型。-或-工作空間中遺漏對應檔案。-或-工作空間中遺漏儲存體模型。-或-連接不在已關閉狀態。 |
| ProviderIncompatibleException | connection 不是來自於 ADO.NET Entity Framework 相容的提供者。 |