EF
1）简单查询
后台代码
1 using MvcApplication18.Models;
2 using System;
3 using System.Collections.Generic;
4 using System.Data.SqlClient;
5 using System.Linq;
6 using System.Web;
7 using System.Web.Mvc;
8
9 namespace MvcApplication18.Controllers
10 {
11 public class HomeController : Controller
12 {
13 //
14 // GET: /Home/
15 appDBEntities db = new appDBEntities();
16 public ActionResult Index()
17 {
18 SqlParameter[] parameter = { };
19 List<SecondHand_info> list = db.Database.SqlQuery<SecondHand_info>("select * from SecondHand_info where SecondHand_keyID >88", parameter).ToList();
20 ViewData["list"] = list;
21 return View();
22 }
23
24 }
25 }
前台代码
1 @model MvcApplication18.Models.SecondHand_info
2 @using MvcApplication18.Models
3 @{
4 ViewBag.Title = "Index";
5 }
6
7 @foreach (SecondHand_info item in ViewData["list"] as List<SecondHand_info>)
8 {
9 <p>@item.SecondHand_keyID </p>
10 <p>@item.SecondHand_mobile </p>
11 <p>@item.SecondHand_title </p>
12 <p>@item.SecondHand_context </p>
13
14 }
2)带参数查询
后台代码
1 using MvcApplication18.Models;
2 using System;
3 using System.Collections.Generic;
4 using System.Data.SqlClient;
5 using System.Linq;
6 using System.Web;
7 using System.Web.Mvc;
8
9 namespace MvcApplication18.Controllers
10 {
11 public class HomeController : Controller
12 {
13 //
14 // GET: /Home/
15 appDBEntities db = new appDBEntities();
16 public ActionResult Index()
17 {
18 var id = "88";
19 var mobile = "18017848011";
20 var sql = "select * from SecondHand_info where SecondHand_keyID [email protected] and [email protected]";
21 List<SecondHand_info> list= db.Database.SqlQuery<SecondHand_info>(
22 sql,
23 new SqlParameter("@id",id),
24 new SqlParameter("@mobile",mobile)
25
26 ).ToList();
27 db.SaveChanges();
28 ViewData["list"] = list;
29 return View();
30 }
31
32 }
33 }
前台代码
1 @model MvcApplication18.Models.SecondHand_info
2 @using MvcApplication18.Models
3 @{
4 ViewBag.Title = "Index";
5 }
6
7 @foreach (SecondHand_info item in ViewData["list"] as List<SecondHand_info>)
8 {
9 <p>@item.SecondHand_keyID </p>
10 <p>@item.SecondHand_mobile </p>
11 <p>@item.SecondHand_title </p>
12 <p>@item.SecondHand_context </p>
13
14 }
15 <h2>Index</h2>
3)修改
后台代码
using MvcApplication18.Models;
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace MvcApplication18.Controllers
{
public class HomeController : Controller
{
//
// GET: /Home/
appDBEntities db = new appDBEntities();
public ActionResult Index()
{
//修改
List<SecondHand_info> list = db.Set<SecondHand_info>().SqlQuery("select * from SecondHand_info where SecondHand_keyID =88").ToList();
list.Last().SecondHand_mobile = "18017848011";//把SecondHand_keyID =88 的手机号改为18017848011
db.SaveChanges();
ViewData["list"] = list;
return View();
}
}
}
前台代码
1 @model MvcApplication18.Models.SecondHand_info
2 @using MvcApplication18.Models
3 @{
4 ViewBag.Title = "Index";
5 }
6
7 @foreach (SecondHand_info item in ViewData["list"] as List<SecondHand_info>)
8 {
9 <p>@item.SecondHand_keyID </p>
10 <p>@item.SecondHand_mobile </p>
11 <p>@item.SecondHand_title </p>
12 <p>@item.SecondHand_context </p>
13
14 }
4)带参数的存储过程（所以字段都要列出不然会出现问题）
1 create proc P_QuerybyId_secondhand 2 @SecondHand_keyID int 3 as 4 begin 5 select SecondHand_keyID, SecondHand_mobile, SecondHand_title, SecondHand_new, SecondHand_type, SecondHand_money, SecondHand_context, SecondHand_pic1, SecondHand_pic2, SecondHand_pic3, SecondHand_pic4, SecondHand_pic5, SecondHand_pic, SecondHand_time, Memo FROM SecondHand_info where SecondHand_keyID=@SecondHand_keyID 6 end
1 using MvcApplication18.Models;
2 using System;
3 using System.Collections.Generic;
4 using System.Data.SqlClient;
5 using System.Linq;
6 using System.Web;
7 using System.Web.Mvc;
8
9 namespace MvcApplication18.Controllers
10 {
11 public class HomeController : Controller
12 {
13 //
14 // GET: /Home/
15 appDBEntities db = new appDBEntities();
16 public ActionResult Index()
17 {
18
19 var param = new SqlParameter("SecondHand_keyID", 89);
20 List<SecondHand_info> list = db.Database.SqlQuery<SecondHand_info>("P_QuerybyId_secondhand @SecondHand_keyID", param).ToList();
21 db.SaveChanges();
22 ViewData["list"] = list;
23 return View();
24 }
25
26 }
27 }
1 @model MvcApplication18.Models.SecondHand_info
2 @using MvcApplication18.Models
3 @{
4 ViewBag.Title = "Index";
5 }
6
7 @foreach (SecondHand_info item in ViewData["list"] as List<SecondHand_info>)
8 {
9 <p>@item.SecondHand_keyID </p>
10 <p>@item.SecondHand_mobile </p>
11 <p>@item.SecondHand_title </p>
12 <p>@item.SecondHand_context </p>
13
14 }
15 <h2>Index</h2>
5)带输出参数的存储过程
1 CREATE PROCEDURE [dbo].[Myproc] 2 @Name NVARCHAR(max), 3 @PageIndex int, 4 @PageSize INT, 5 @TotalCount int OUTPUT 6 as 7 8 declare @startRow int 9 declare @endRow int 10 11 set @startRow = (@PageIndex - 1) * @PageSize + 1 12 set @endRow = @startRow + @PageSize - 1 13 14 select * 15 FROM 16 ( 17 select top (@endRow) 18 ID, 19 Age, 20 Name, 21 row_number() over(order by [ID] desc) as [RowIndex] 22 from dbo.Student 23 ) as T 24 where [RowIndex] >= @startRow AND T.Name = @Name 25 26 SET @TotalCount=(select count(1) as N 27 FROM dbo.Student WHERE Name = @Name)
1 var name = new SqlParameter { ParameterName = "Name", Value = Name };
2 var currentpage = new SqlParameter { ParameterName = "PageIndex", Value = currentPage };
3 var pagesize = new SqlParameter { ParameterName = "PageSize", Value = pageSize };
4 var totalcount = new SqlParameter { ParameterName = "TotalCount", Value = 0, Direction = ParameterDirection.Output };
5
6 var list = ctx.Database.SqlQuery<Student>("Myproc @Name, @PageIndex, @PageSize, @TotalCount output",
7 name, currentpage, pagesize, totalcount);
8
9 totalCount = (int)totalcount.Value; /*获得要输出参数totalcount的值*/
时间： 2024-10-21 14:08:20