数据库数据：Northwind中的Region表
Region类是根据Region表自动生成的
后台代码：
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
using System.Web.Mvc;
using T1_EF.Models;
namespace T1_EF.Controllers
{
public class RegionController : Controller
{
DbContext db = new NorthwindEntities();
// GET: Region
public ActionResult Index()
{
var list = db.Set<Region>();
ViewData.Model = list;
return View();
}
[HttpPost]
public ActionResult Add()//新增
{
int regionID = int.Parse(HttpContext.Request["regionID"]);
string regionDes = HttpContext.Request["regionDes"];
Region regData = new Region { RegionID = regionID, RegionDescription = regionDes };
db.Set<Region>().Add(regData);
db.SaveChanges();//如果内存中的数据发生了改变，并且希望将变化映射到数据库中，需要执行保存。
return Redirect(Url.Action("Index","Region"));
}
[HttpPost]
public ActionResult Edit()//编辑
{
int regionID = int.Parse(HttpContext.Request["regionID"]);
string regionDes = HttpContext.Request["regionDes"];
Region region = new Region { RegionID = regionID, RegionDescription = regionDes };
db.Set<Region>().AddOrUpdate(region);//该方法需要引用Data.Entity中的Migrations
db.SaveChanges();
return Redirect("/Region/Index");
}
public ActionResult Delete()//删除
{
//根据HttpContext上下文对象查询出前台表单提交的数据
int regionID = int.Parse(HttpContext.Request["regionID"]);
//查询出要删除的对象
var data = db.Set<Region>().FirstOrDefault(r => r.RegionID == regionID);
db.Set<Region>().Remove(data);
db.SaveChanges();
return Redirect(Url.Action("Index", "Region"));
}
}
}
前台代码：
@model IEnumerable<T1_EF.Models.Region>
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
<table border="1">
@foreach (var item in Model)
{
<tr>
<td>@item.RegionID</td>
<td>@item.RegionDescription</td>
</tr>
}
</table>
<hr />
<form action="@Url.Action("Add","Region")" method="post">
<span>区域ID：</span>
<input type="text" name="regionID" value="" />
<span>区域：</span>
<input type="text" name="regionDes" value="" />
<input type="submit" name="" value="新增" />
</form>
<hr />
@*这里的表单不能用put提交方法*@
<form action[email protected]("Edit","Region") method="post">
<span>区域ID:</span>
<input type="text" name="regionID" placeholder="填写要修改数据的ID" />
<span>区域:</span>
<input type="text" name="regionDes" value="" />
<input type="submit" name="change" value="修改" />
</form>
<hr />
<form action[email protected]("Delete","Region") method="post">
<span>区域ID:</span>
<input type="text" name="regionID" placeholder="填写要删除数据的ID" />
<input type="submit" name="change" value="删除" />
</form>
</div>
</body>
</html>
显示效果：
End
原文地址：https://www.cnblogs.com/LeeSki/p/12264638.html
时间： 2024-10-12 21:42:54