C# 实体框架性能差

我在C#Windows窗体应用程序中使用EF 6.1.1，在性能因素方面遇到了奇怪的问题

我的数据库有一个名为

Ticket

的表，有49300条记录。此表链接了多个其他表。实体框架图位于：

记录计数如下：

BillableOption 4 Company 390 Contact 687 Location 3 Member 16 ServiceBoard 6 ServiceItem 0 ServicePriority 8 ServiceSource 5 ServiceStatus 93 ServiceSubType 668 ServiceType 20 Ticket 49300 TimeEntry 52518 TimeEntryMember 0 WorkRole 10 WorkType 5

---

如果确实需要将那么多记录绑定到DataGridView，那么应该使用

引用msdn：

在DataGridView控件中实现虚拟模式的一个原因是仅在需要时检索数据。这称为即时数据加载

---

.ToList（）方法占用的时间最长。@SanketShah，使用虚拟模式不会有问题，因为只在需要时检索数据。并非一次检索所有记录。是否有与EF 6相关的样本？我正在使用

DbContext

方法。@SanketShah，不，我没有任何示例在EF6的虚拟模式下使用DataGridView。 public static List LoadTicket() { bool lastValue1 = DataAccessLocal.dc.Configuration.AutoDetectChangesEnabled; bool lastValue2 = DataAccessLocal.dc.Configuration.ProxyCreationEnabled; DataAccessLocal.dc.Configuration.AutoDetectChangesEnabled = false; DataAccessLocal.dc.Configuration.ProxyCreationEnabled = false; var returnValue = (from r in DataAccessLocal.dc.Tickets.AsNoTracking() select new LinqTicket { Summary = r.Summary, DetailDescription = r.Summary, Resolution = r.Resolution, CompanyName = r.Company.CompanyName, ContactName = (r.Contact == null ? string.Empty : r.Contact.FirstName + " " + r.Contact.LastName), BoardName = r.ServiceBoard.ServiceBoardName, Priority = r.ServicePriority.ServicePriorityName, Source = r.ServiceSource.ServiceSourceName, Location = r.Location.LocationName, ServiceType = r.ServiceTypeRecId == null ? string.Empty : r.ServiceType.ServiceTypeName, ServiceSubType = r.ServiceSubTypeRecId == null ? string.Empty : r.ServiceSubType.ServiceSubTypeName, ServiceItem = r.ServiceItemRecId == null ? string.Empty : r.ServiceItem.ServiceItemText, StatusName = r.ServiceStatus.ServiceStatusName, TicketRecId = r.TicketRecId, RemoteTicketId = r.RemoteTicketRecId.Value, DueDate = r.RequiredDate == null ? new DateTime(1900, 1, 1) : r.RequiredDate.Value, EstimatedHours = r.BudgetHours == null ? 0 : r.BudgetHours.Value, ServiceBoardId = r.ServiceBoard.ServiceBoardRecId, InternalStatus = r.InternalStatus.HasValue == true ? (enmInternalStatus)r.InternalStatus.Value : enmInternalStatus.OK, LastUpdatedByMemberRecId = r.LastUpdatedByMemberRecId }).ToList(); DataAccessLocal.dc.Configuration.AutoDetectChangesEnabled = lastValue1; DataAccessLocal.dc.Configuration.ProxyCreationEnabled = lastValue2; return returnValue; }