本文整理汇总了VB.NET中System.Data.Objects.DataClasses.EntityReference<TEntity>类的典型用法代码示例。如果您正苦于以下问题：VB.NET EntityReference<TEntity>类的具体用法？VB.NET EntityReference<TEntity>怎么用？VB.NET EntityReference<TEntity>使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了EntityReference<TEntity>类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: AdventureWorksEntities
' Define the order and new address IDs.
Dim orderId As Integer = 43669
Dim addressId As Integer = 26
Using context As New AdventureWorksEntities()
' Get the billing address to change to.
Dim address As Address = context.Addresses.Single(Function(c) c.AddressID = addressId)
' Get the order being changed.
Dim order As SalesOrderHeader = context.SalesOrderHeaders.Single(Function(o) o.SalesOrderID = orderId)
' You do not have to call the Load method to load the addresses for the order,
' because lazy loading is set to true
' by the constructor of the AdventureWorksEntities object.
' With lazy loading set to true the related objects are loaded when
' you access the navigation property. In this case Address.
' Write the current billing street address.
Console.WriteLine("Current street: " & order.Address.AddressLine1)
' Change the billing address.
If Not order.Address.Equals(address) Then
' Use Address navigation property to change the association.
order.Address = address
' Write the changed billing street address.
Console.WriteLine("Changed street: " & order.Address.AddressLine1)
End If
' If the address change succeeds, save the changes.
context.SaveChanges()
' Write the current billing street address.
Console.WriteLine("Current street: " & order.Address.AddressLine1)
End Using