C# 如何获取仅与员工StaffID会话相关的数据
我发现,要从一家公司获得员工,我使用以下方法:C# 如何获取仅与员工StaffID会话相关的数据,c#,sql,asp.net,asp.net-mvc,C#,Sql,Asp.net,Asp.net Mvc,我发现,要从一家公司获得员工,我使用以下方法: public ActionResult Index() { int staffID = (int)Session["StaffID"]; var staffRecord = db.Staffs.FirstOrDefault(staff => staff.StaffID == staffID); var company = staffRecord.Company; var staffForCompany = co
public ActionResult Index()
{
int staffID = (int)Session["StaffID"];
var staffRecord = db.Staffs.FirstOrDefault(staff => staff.StaffID == staffID);
var company = staffRecord.Company;
var staffForCompany = company.Staffs;
return View(staffForCompany);
}
这将获得该员工/公司的预订:
public ActionResult Index()
{
int staffID = (int)Session["StaffID"];
var staffRecord = db.Staffs.FirstOrDefault(staff => staff.StaffID == staffID);
var company = staffRecord.Company;
var bookingsForCompany = company.Bookings;
return View(bookingsForCompany);
}
我想知道的是,如何从与员工/公司表没有直接关联的表中获取数据
我想要的客户,涉及该公司的工作人员登录
如图所示这应该可以:
var customers = db.Staffs
.Where(s => s.StaffID == staffId)
.Select(s => s.Company)
.SelectMany(c => c.Bookings)
.Select(bk => bk.Customer)
.ToList();
var customers = staffRecord.Company.Bookings.Select(b => b.Customer);
从图中给出的ER图来看,该公司似乎有1..n个预订,每个预订与一个客户绑定 这应该起作用:
var customers = db.Staffs
.Where(s => s.StaffID == staffId)
.Select(s => s.Company)
.SelectMany(c => c.Bookings)
.Select(bk => bk.Customer)
.ToList();
var customers = staffRecord.Company.Bookings.Select(b => b.Customer);