EntityConnection 构造函数 (MetadataWorkspace, DbConnection)

[本页针对的是实体框架版本 6。最新版本以“实体框架”NuGet 包的形式提供。有关实体框架的更多信息,请参见 msdn.com/data/ef。]

使用指定的 MetadataWorkspaceDbConnection 来初始化 EntityConnection 类的新实例。

命名空间:  System.Data.Entity.Core.EntityClient
程序集:  EntityFramework(在 EntityFramework.dll 中)

语法

声明
<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 _
)
用法
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
)

参数

异常

例外 条件
ArgumentNullException

workspace 或 connection 参数为 null。

ArgumentException

工作区缺少概念模型。-或-工作区缺少映射文件。-或-工作区缺少存储模型。-或-连接未处于关闭状态。

ProviderIncompatibleException

connection 并非来自与 ADO.NET Entity Framework 兼容的提供程序。

请参阅

参考

EntityConnection 类

EntityConnection 重载

System.Data.Entity.Core.EntityClient 命名空间