Question

我正在尝试将 C＃代码转换为VB代码 ：

在C＃代码中，它可以调用AddOrUpdate方法，但是当我在VB中编码时，它在intellisense中找不到。

c＃code：

  protected override void Seed(eManager.Web.Infrastructure.DepartmentDB context){
         context.Departments.AddOrUpdate( d => d.Name,
                  new Department() { Name = "Engineering"},
                  new Department() { Name = "Sales"}
         );
     }

VB代码：

但是当我用VB编写方法AddOrUpdate（）时，我找不到它。 DepartmentDB类的声明是这样的：

 Imports System
    Imports System.Collections
    Imports System.Collections.Generic
    Imports System.Linq
    Imports System.Text
    Imports System.Threading.Tasks
    Imports System.Data.Entity
    Imports eManager.Domain

    Public Class DepartmentDB
       Inherits DbContext
       Implements IDepartmentDataSource

    Private _DBEmployees As DbSet(Of Employee)
    Private _DBDepartments As DbSet(Of Department)

    Public ReadOnly Property Departments As IQueryable(Of Department) Implements IDepartmentDataSource.Departments
        Get
            Return _DBDepartments
        End Get
    End Property


    Public ReadOnly Property Employees As IQueryable(Of Employee) Implements IDepartmentDataSource.Employees
        Get
            Return _DBEmployees
        End Get
    End Property
End Class

Answer 1

我认为你错过了

Imports System.Data.Entity.Migrations

因为AddOrUpdate（）是一个扩展方法： MSDN article for AddOrUpdate method

使用VB.NET找不到AddOrUpdate（）方法？

1 个答案: