我的实体是这些：
public class Customer
{
public Customer()
{
Invoices = new List<Invoice>();
Payments = new List<Payment>();
}
public int ID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public IList<Payment> Payments { get; set; }
}
public class Payment
{
public int ID { get; set; }
public int CustomerID { get; set; }
public decimal CreditPrice { get; set; }
public decimal DebitPrice { get; set; }
public DateTime PaymentDate { get; set; }
[ForeignKey("CustomerID")]
public Customer Customer { get; set; }
}
这是我的上下文：
public class AccountingContext : DbContext,IDisposable
{
public DbSet<Customer> Customers { get; set; }
public DbSet<Payment> Payments { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Entity<Payment>()
.Hasrequired(s => s.Customer)
.WillCascadeOnDelete();
base.OnModelCreating(modelBuilder);
}
}
我在WillCascadeOnDelete()中收到此错误：
Error 1 ‘System.Data.Entity.ModelConfiguration.Configuration.requiredNavigationPropertyConfiguration’ does not contain a definition for ‘WillCascadeOnDelete’ and no extension method ‘WillCascadeOnDelete’ accepting a first argument of type ‘System.Data.Entity.ModelConfiguration.Configuration.requiredNavigationPropertyConfiguration’ could be found (are you missing a using directive or an assembly reference?) D:\Work\C# Projects\Visual Studio 2010\Windows\WPF\New folder\Accounting Without EF Code First\Accounting – Copy\DAL.EF.CodeFirst\Entities\Context\AccountingContext.cs 22 22 DAL.EF.CodeFirst
我想删除客户级联付款(只要客户被删除).我如何才能在EF代码中实现这一点？
我也想使用级联更新.
请帮我解决这些问题.
感谢名单.
解决方法
描述
您需要在您的上下文中配置modelBuilder.
样品
public class AccountingContext : DbContext,IDisposable
{
public DbSet<Customer> Customers { get; set; }
public DbSet<Payment> Payments { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Entity<Payment>()
.Hasrequired(s => s.Customer)
.WithMany()
.WillCascadeOnDelete(true);
base.OnModelCreating(modelBuilder);
}
}
