Linq to SQL 练习
Posted Jevon
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1 public class HomeController : Controller 2 { 3 // 4 // GET: /Home/ 5 empentity entity = new empentity(); 6 public ActionResult Index() 7 { 8 List<EmpCount> lst = (from m in entity.emp.ToList() 9 join n in entity.dept.ToList() on m.DEPTNO equals n.DEPTNO 10 group m by m.DEPTNO into newEmp 11 select new EmpCount 12 { 13 DeptID = newEmp.Key, 14 DName = entity.dept.Where(p => p.DEPTNO == newEmp.Key).FirstOrDefault().DNAME, 15 Count = newEmp.Count() 16 }).ToList(); 17 18 19 return View(lst); 20 } 21 public ActionResult SelSal() 22 { 23 List<emp> lst = (from s in entity.emp.ToList() 24 select s).ToList(); 25 return View(lst); 26 } 27 public ActionResult SelEmpSal() 28 { 29 ViewBag.SalgradeId = new SelectList(entity.salgrade.ToList(), "SalgradeId", "GRADE"); 30 return View(entity.emp.ToList()); 31 } 32 [HttpPost] 33 public ActionResult SelEmpSal(int SalgradeId) 34 { 35 ViewBag.SalgradeId = new SelectList(entity.salgrade.ToList(), "SalgradeId", "GRADE"); 36 Salgrade lst = (from s in entity.salgrade.ToList() 37 where s.SalgradeId == SalgradeId 38 select s).FirstOrDefault(); 39 int Max = lst.HISAL; 40 int Min = lst.LOSAL; 41 List<emp> lst1 = (from m in entity.emp.ToList() 42 where m.SAL > Min && m.SAL < Max 43 select m).ToList(); 44 return View("SelEmpSal", lst1); 45 46 } 47 public ActionResult EmpSal1() 48 { 49 Salgrade sal = (from s in entity.salgrade.ToList() 50 where s.GRADE.Contains("二级") 51 select s).FirstOrDefault(); 52 int Max = sal.HISAL; 53 int Min = sal.LOSAL; 54 List<emp> lst = (from i in entity.emp.ToList() 55 where i.SAL > Min && i.SAL < Max 56 select i).ToList(); 57 return View(lst); 58 } 59 public ActionResult EmpCount() 60 { 61 Salgrade sal = (from s in entity.salgrade.ToList() 62 where s.GRADE.Contains("一级") 63 select s).FirstOrDefault(); 64 int Max = sal.HISAL; 65 int Min = sal.LOSAL; 66 List<EmpCount> count = (from m in entity.emp.ToList() 67 join n in entity.dept.ToList() on m.DEPTNO equals n.DEPTNO 68 where m.SAL > Min && m.SAL < Max 69 group m by m.DEPTNO into newEmp 70 select new EmpCount 71 { 72 DeptID = newEmp.Key, 73 DName = entity.dept.Where(p => p.DEPTNO == newEmp.Key).FirstOrDefault().DNAME, 74 Count = newEmp.Count() 75 }).ToList(); 76 return View(count); 77 } 78 public ActionResult EmpSal2() 79 { 80 Salgrade sal = (from s in entity.salgrade.ToList() 81 where s.GRADE == "二级" 82 select s).FirstOrDefault(); 83 int Max = sal.HISAL; 84 int Min = sal.LOSAL; 85 List<emp> lst = (from i in entity.emp.ToList() 86 where i.SAL > Min && i.SAL < Max 87 select i).ToList(); 88 return View(lst); 89 } 90 public ActionResult EmpCount1() 91 { 92 Salgrade sal = (from s in entity.salgrade.ToList() 93 where s.GRADE == "一级" 94 select s).FirstOrDefault(); 95 int Max = sal.HISAL; 96 int Min = sal.LOSAL; 97 List<EmpCount> lst = (from m in entity.emp.ToList() 98 join n in entity.dept.ToList() on m.DEPTNO equals n.DEPTNO 99 where m.SAL>Min&&m.SAL<Max 100 group m by m.DEPTNO into newEmp 101 select new EmpCount 102 { 103 DeptID = newEmp.Key, 104 DName = entity.dept.Where(p => p.DEPTNO == newEmp.Key).FirstOrDefault().DNAME, 105 Count = newEmp.Count() 106 }).ToList(); 107 return View(lst); 108 } 109 public ActionResult EmpLd() 110 { 111 List<emp> lst = (from n in entity.emp.ToList() 112 join m in entity.emp.ToList() on n.EMPNO equals m.MGR 113 select n).Distinct().ToList(); 114 ViewBag.DEPTNO = new SelectList(entity.dept.ToList(), "DEPTNO", "DNAME"); 115 ViewBag.SalgradeId = new SelectList(entity.salgrade.ToList(), "SalgradeId", "GRADE"); 116 return View(lst); 117 } 118 [HttpPost] 119 public ActionResult EmpLd1(int DEPTNO, int SalgradeId) 120 { 121 ViewBag.DEPTNO = new SelectList(entity.dept.ToList(), "DEPTNO", "DNAME"); 122 ViewBag.SalgradeId = new SelectList(entity.salgrade.ToList(), "SalgradeId", "GRADE"); 123 Salgrade sal = entity.salgrade.Find(SalgradeId); 124 int Max = sal.HISAL; 125 int Min = sal.LOSAL; 126 List<emp> lst = (from n in entity.emp.ToList() 127 join m in entity.emp.ToList() on n.EMPNO equals m.MGR 128 where n.SAL > Min && n.SAL < Max && n.DEPTNO == DEPTNO 129 select n).Distinct().ToList(); 130 foreach (emp item in lst) 131 { 132 emp s = entity.emp.Find(item.EMPNO); 133 s.SAL = item.SAL + 2000; 134 } 135 entity.SaveChanges(); 136 return RedirectToAction("EmpLd"); 137 } 138 public ActionResult EmpLd2() 139 { 140 List<emp> ld = (from m in entity.emp.ToList() 141 join n in entity.emp.ToList() on m.EMPNO equals n.MGR 142 select m).Distinct().ToList(); 143 ViewBag.DEPTNO = new SelectList(entity.dept.ToList(), "DEPTNO", "DNAME"); 144 ViewBag.SalgradeId = new SelectList(entity.salgrade.ToList(), "SalgradeId", "GRADE"); 145 return View(ld); 146 } 147 [HttpPost] 148 public ActionResult EmpLd3(int DEPTNO, int SalgradeId) 149 { 150 ViewBag.DEPTNO = new SelectList(entity.dept.ToList(), "DEPTNO", "DNAME"); 151 ViewBag.SalgradeId = new SelectList(entity.salgrade.ToList(), "SalgradeId", "GRADE"); 152 Salgrade sal = entity.salgrade.Find(SalgradeId); 153 List<emp> lst = (from n in entity.emp.ToList() 154 join m in entity.emp.ToList() on n.EMPNO equals m.MGR 155 where n.SAL > sal.LOSAL && n.SAL < sal.HISAL && n.DEPTNO == DEPTNO 156 select n).Distinct().ToList(); 157 foreach (emp item in lst) 158 { 159 emp s = entity.emp.Find(item.EMPNO); 160 s.SAL = item.SAL + 2000; 161 } 162 entity.SaveChanges(); 163 return RedirectToAction("EmpLd2"); 164 } 165 }
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