EntityConnection 构造函数

定义

命名空间:

System.Data.Entity.Core.EntityClient

程序集:

EntityFramework.dll

重载

EntityConnection()	初始化 EntityConnection 类的新实例。
EntityConnection(String)	基于连接字符串初始化 EntityConnection 类的新实例。
EntityConnection(MetadataWorkspace, DbConnection)	使用指定的 EntityConnection 和 MetadataWorkspace 初始化 DbConnection 类的新实例。
EntityConnection(MetadataWorkspace, DbConnection, Boolean)	从内存中加载的元数据构造 EntityConnection

EntityConnection()

初始化 EntityConnection 类的新实例。

[System.Diagnostics.CodeAnalysis.SuppressMessage("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 ();

Public Sub New ()

属性

SuppressMessageAttribute

EntityConnection(String)

基于连接字符串初始化 EntityConnection 类的新实例。

[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("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 (string connectionString);

new System.Data.Entity.Core.EntityClient.EntityConnection : string -> System.Data.Entity.Core.EntityClient.EntityConnection

Public Sub New (connectionString As String)

参数

connectionString

String

提供程序特定的连接字符串。

属性

SuppressMessageAttribute

例外

ArgumentException

提供的连接字符串关键字无效，或未提供所需的连接字符串关键字。

EntityConnection(MetadataWorkspace, DbConnection)

使用指定的 和 初始化 类的新实例。

[System.Diagnostics.CodeAnalysis.SuppressMessage("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 (System.Data.Entity.Core.Metadata.Edm.MetadataWorkspace workspace, System.Data.Common.DbConnection connection);

new System.Data.Entity.Core.EntityClient.EntityConnection : System.Data.Entity.Core.Metadata.Edm.MetadataWorkspace * System.Data.Common.DbConnection -> System.Data.Entity.Core.EntityClient.EntityConnection

Public Sub New (workspace As MetadataWorkspace, connection As DbConnection)

参数

workspace

MetadataWorkspace

与此 MetadataWorkspace 关联的 EntityConnection。

connection

DbConnection

此 EntityConnection 对象的基础数据源连接。

属性

SuppressMessageAttribute

例外

ArgumentNullException

workspace 或 connection 参数为 null。

ArgumentException

工作区中缺少概念模型。-或工作区中缺少映射文件。-或工作区中缺少存储模型。-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。

EntityConnection(MetadataWorkspace, DbConnection, Boolean)

从内存中加载的元数据构造 EntityConnection

[System.Diagnostics.CodeAnalysis.SuppressMessage("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 (System.Data.Entity.Core.Metadata.Edm.MetadataWorkspace workspace, System.Data.Common.DbConnection connection, bool entityConnectionOwnsStoreConnection);

new System.Data.Entity.Core.EntityClient.EntityConnection : System.Data.Entity.Core.Metadata.Edm.MetadataWorkspace * System.Data.Common.DbConnection * bool -> System.Data.Entity.Core.EntityClient.EntityConnection

Public Sub New (workspace As MetadataWorkspace, connection As DbConnection, entityConnectionOwnsStoreConnection As Boolean)

参数

workspace

MetadataWorkspace

包含元数据信息的工作区。

connection

DbConnection

存储连接。

entityConnectionOwnsStoreConnection

Boolean

如果设置为 true，则在释放实体连接时释放存储连接，否则调用方必须释放存储连接。

属性

SuppressMessageAttribute