• 用MVC4练习,后台用aspx，数据库DemoDb《MvcUserDemo》

    将ado.net的cs文件SqlHelper.cs放入解决方案

      1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Configuration;
  6 using System.Data.SqlClient;
  7 using System.Data;
  8 
  9 namespace MvcUserDemo
 10 {
 11     public static class  SqlHelper
 12     {
 13         public static readonly string connstr =
 14             ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
 15 
 16         public static SqlConnection OpenConnection()
 17         {
 18             SqlConnection conn = new SqlConnection(connstr);
 19             conn.Open();
 20             return conn;
 21         }
 22 
 23         public static int ExecuteNonQuery(string cmdText,
 24             params SqlParameter[] parameters)
 25         {
 26             using (SqlConnection conn = new SqlConnection(connstr))
 27             {
 28                 conn.Open();
 29                 return ExecuteNonQuery(conn, cmdText, parameters);
 30             }
 31         }
 32 
 33         public static object ExecuteScalar(string cmdText,
 34             params SqlParameter[] parameters)
 35         {
 36             using (SqlConnection conn = new SqlConnection(connstr))
 37             {
 38                 conn.Open();
 39                 return ExecuteScalar(conn, cmdText, parameters);
 40             }
 41         }
 42 
 43         public static DataTable ExecuteDataTable(string cmdText,
 44             params SqlParameter[] parameters)
 45         {
 46             using (SqlConnection conn = new SqlConnection(connstr))
 47             {
 48                 conn.Open();
 49                 return ExecuteDataTable(conn, cmdText, parameters);
 50             }
 51         }
 52 
 53         public static int ExecuteNonQuery(SqlConnection conn,string cmdText,
 54            params SqlParameter[] parameters)
 55         {
 56             using (SqlCommand cmd = conn.CreateCommand())
 57             {
 58                 cmd.CommandText = cmdText;
 59                 cmd.Parameters.AddRange(parameters);
 60                 return cmd.ExecuteNonQuery();
 61             }
 62         }
 63 
 64         public static object ExecuteScalar(SqlConnection conn, string cmdText,
 65             params SqlParameter[] parameters)
 66         {
 67             using (SqlCommand cmd = conn.CreateCommand())
 68             {
 69                 cmd.CommandText = cmdText;
 70                 cmd.Parameters.AddRange(parameters);
 71                 return cmd.ExecuteScalar();
 72             }
 73         }
 74 
 75         public static DataTable ExecuteDataTable(SqlConnection conn, string cmdText,
 76             params SqlParameter[] parameters)
 77         {
 78             using (SqlCommand cmd = conn.CreateCommand())
 79             {
 80                 cmd.CommandText = cmdText;
 81                 cmd.Parameters.AddRange(parameters);
 82                 using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))
 83                 {
 84                     DataTable dt = new DataTable();
 85                     adapter.Fill(dt);
 86                     return dt;
 87                 }
 88             }
 89         }
 90 
 91         public static object ToDBValue(this object value)
 92         {
 93             return value == null ? DBNull.Value : value;
 94         }
 95 
 96         public static object FromDBValue(this object dbValue)
 97         {
 98             return dbValue == DBNull.Value ? null : dbValue;
 99         }
100     }
101 }
    SqlHelper

    在web.config中配置连接数据库文件

    1 <connectionStrings>
2     <add name="connstr" connectionString="server=.;uid=sa;pwd=321654;database=DemoDb"/>
3   </connectionStrings>
    add

    创建一个控制器和页面,并获取数据库中的UserInfo表中的数据，把数据传递到前台页面进行展示

     1 using System;
 2 using System.Collections.Generic;
 3 using System.Data;
 4 using System.Linq;
 5 using System.Web;
 6 using System.Web.Mvc;
 7 
 8 namespace MvcUserDemo.Controllers
 9 {
10     public class UserInfoController : Controller
11     {
12         //
13         // GET: /UserInfo/
14 
15         public ActionResult Index()
16         {
17             //获取数据库中的UserInfo表中的数据
18             DataTable dt=SqlHelper.ExecuteDataTable("select Id, UserName, Age from dbo.UserInfo");
19 
20             //把数据传递到前台页面进行展示
21             ViewData["dt"] = dt;
22             return View();
23         }
24 
25     }
26 }
    UserInfoController.cs

     前台页面展示数据库中的数据

     1 <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>
 2 
 3 <%@ Import Namespace="System.Data" %>
 4 
 5 <!DOCTYPE html>
 6 
 7 <html>
 8 <head runat="server">
 9     <meta name="viewport" content="width=device-width" />
10     <title>Index</title>
11 </head>
12 <body>
13     <div>
14         <%
15             DataTable dt = (DataTable)ViewData["dt"]; 
16           
17         %>
18 
19         <table>
20             <tr>
21                 <th>编号</th>
22                 <th>姓名</th>
23                 <th>年龄</th>
24             </tr>
25 
26             <%foreach (DataRow dataRow in dt.Rows)
27               {%>
28 
29             <tr>
30                 <td />
31                 <%:dataRow["Id"] %><td />
32                 <td />
33                 <%:dataRow["UserName"]%><td />
34                 <td><%:dataRow["Age"]%>
35                 <td />
36             </tr>
37 
38             <%}%>
39         </table>
40     </div>
41 </body>
42 </html>
    Index.aspx

     用户注册模块(拿到表单里面传递过来的数据,往数据库插入数据,返回首页)

     1 using System;
 2 using System.Collections.Generic;
 3 using System.Data;
 4 using System.Linq;
 5 using System.Web;
 6 using System.Web.Mvc;
 7 using System.Data;
 8 using System.Data.SqlClient;
 9 
10 namespace MvcUserDemo.Controllers
11 {
12     public class UserInfoController : Controller
13     {
14         #region 用户列表
15 
16         //
17         // GET: /UserInfo/
18 
19         public ActionResult Index()
20         {
21             //获取数据库中的UserInfo表中的数据
22             DataTable dt = SqlHelper.ExecuteDataTable("select Id, UserName, Age from dbo.UserInfo");
23 
24             //把数据传递到前台页面进行展示
25             ViewData["dt"] = dt;
26             return View();
27         }
28         #endregion
29 
30         #region 用户注册页面
31         public ActionResult Add()
32         {
33             return View();
34         }
35 
36         #endregion
37         //用户注册方法    
38         public ActionResult ProcessAdd(FormCollection collection)
39         {
40             // 拿到表单里面传递过来的数据
41             string userName = Request["UserName"];
42             int Age = Convert.ToInt32(Request["Age"]);
43             //int Age = int.Parse(collection["Age"] ?? "0");
44             //往数据库插入数据
45             string insertSql = "insert UserInfo values(@UserName,@Age)";
46             SqlHelper.ExecuteNonQuery(insertSql,
47                 new SqlParameter("@UserName", userName),
48                 new SqlParameter("@Age", Age));
49 
50             // return Content("OK");
51             return RedirectToAction("Index");
52         }
53 
54     }
55 }
    ProcessAdd
     1 <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>
 2 
 3 <!DOCTYPE html>
 4 
 5 <html>
 6 <head runat="server">
 7     <meta name="viewport" content="width=device-width" />
 8     <title>用户注册</title>
 9 </head>
10 <body>
11     <div>
12         <form method="post" action="/UserInfo/ProcessAdd">
13             <table>
14                 <tr>
15                     <td>用户名：</td>
16                     <td>
17                         <input type="text" name="UserName"></td>
18                 </tr>
19                 <tr>
20                     <td>年龄：</td>
21                     <td>
22                         <input type="text" name="Age"></td>
23                 </tr>
24                 <tr>
25                     <td colspan="2">
26                         <input type="submit" value="用户注册"></td>
27                 </tr>
28             </table>
29         </form>
30     </div>
31 </body>
32 </html>
    用户注册前台页面

    　

    强类型视图

     1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 
 6 namespace MvcUserDemo.Models
 7 {
 8     public class UserInfo
 9     {
10         public string UserName { get; set; }
11         public int Id { get; set; }
12         public int Age { get; set; }
13     }
14 }
    创建一个类

    (显示用户)显示models中的数据

     1 using System;
 2 using System.Collections.Generic;
 3 using System.Data;
 4 using System.Linq;
 5 using System.Web;
 6 using System.Web.Mvc;
 7 using System.Data;
 8 using System.Data.SqlClient;
 9 using MvcUserDemo.Models;
10 
11 namespace MvcUserDemo.Controllers
12 {
13     public class UserInfoController : Controller
14     {
15         #region 用户列表
16 
17         //
18         // GET: /UserInfo/
19 
20         public ActionResult Index()
21         {
22             //获取数据库中的UserInfo表中的数据
23             DataTable dt = SqlHelper.ExecuteDataTable("select Id, UserName, Age from dbo.UserInfo");
24 
25             //把数据传递到前台页面进行展示
26             ViewData["dt"] = dt;
27             return View();
28         }
29         #endregion
30 
31         #region 用户注册页面
32         public ActionResult Add()
33         {
34             return View();
35         }
36 
37         #endregion
38         //用户注册方法    
39         public ActionResult ProcessAdd(FormCollection collection)
40         {
41             // 拿到表单里面传递过来的数据
42             string userName = Request["UserName"];
43             int Age = Convert.ToInt32(Request["Age"]);
44             //int Age = int.Parse(collection["Age"] ?? "0");
45             //往数据库插入数据
46             string insertSql = "insert UserInfo values(@UserName,@Age)";
47             SqlHelper.ExecuteNonQuery(insertSql,
48                 new SqlParameter("@UserName", userName),
49                 new SqlParameter("@Age", Age));
50 
51             // return Content("OK");
52             return RedirectToAction("Index");
53         }
54 
55 
56         #region 显示用户
57         public ActionResult Show()
58         {
59             UserInfo userInfo = new UserInfo();
60             userInfo.Id = 9;
61             userInfo.UserName = "你懂的";
62             userInfo.Age = 18;
63             ViewData.Model = userInfo;
64             return View();
65         }
66         #endregion
67     }
68 }
    后台代码
     1 <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<MvcUserDemo.Models.UserInfo>" %>
 2 
 3 <%@ Import Namespace="MvcUserDemo.Models" %>
 4 <!DOCTYPE html>
 5 
 6 <html>
 7 <head runat="server">
 8     <meta name="viewport" content="width=device-width" />
 9     <title>Show</title>
10 </head>
11 <body>
12     <div>
13         <table>
14             <tr>
15                 <td>ID:</td>
16                 <td><%:Model.Id %></td>
17                 <td>姓名:</td>
18                 <td><%:Model.UserName %></td>
19                 <td>年龄:</td>
20                 <td><%:Model.Age %></td>
21             </tr>
22         </table>
23     </div>
24     <%:Html.ActionLink("回到首页","Index") %>
25 </body>
26 </html>
    前台代码

     用户的删除

    修改Index页面,并引入jquery文件

    前台代码 
     1 <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>
 2 
 3 <%@ Import Namespace="System.Data" %>
 4 
 5 <!DOCTYPE html>
 6 
 7 <html>
 8 <head runat="server">
 9     <meta name="viewport" content="width=device-width" />
10     <title>Index</title>
11     <script src="../../Scripts/jquery-1.8.2.min.js"></script>
12     <script>
13         $(function () {
14             $("a:contains('删除')").click(function () {
15                 return confirm("请问是否删除此数据?");
16 
17             });
18         });
19 
20     </script>
21 
22 </head>
23 <body>
24     <div>
25         <%
26             DataTable dt = (DataTable)ViewData["dt"]; 
27           
28         %>
29 
30         <table>
31             <tr>
32                 <th>编号</th>
33                 <th>姓名</th>
34                 <th>年龄</th>
35                 <th>删除</th>
36             </tr>
37 
38             <%foreach (DataRow dataRow in dt.Rows)
39               {%>
40 
41             <tr>
42                 <td />
43                 <%:dataRow["Id"] %><td />
44                 <td />
45                 <%:dataRow["UserName"]%><td />
46                 <td><%:dataRow["Age"]%>
47                 <td />
48                 <td><%:Html.ActionLink("删除", "Delete", "UserInfo", new { Id = dataRow["Id"] }, new { })%>
49                 <td />
50             </tr>
51 
52             <%}%>
53         </table>
54     </div>
55 </body>
56 </html>

    在UserInfo中添加一个新的方法

     1  #region 删除
 2         public ActionResult Delete(int Id)
 3         {
 4             //根据Id删除用户的数据
 5             string sql = "delete from UserInfo where Id=@Id";
 6             SqlHelper.ExecuteNonQuery(sql, new SqlParameter("@Id", Id));
 7 
 8             //页面跳转到删除后的首页
 9 
10             return RedirectToAction("Index");
11         }
12         #endregion
    后台代码

    用户的修改

     1   #region 修改用户
 2 
 3         [HttpGet]
 4         public ActionResult Edit(int Id)
 5         {
 6             string sql = "select UserName,Id,Age from UserInfo where Id=@Id";
 7             DataTable dt = SqlHelper.ExecuteDataTable(sql, new SqlParameter("@Id", Id));
 8 
 9             //把dt转成UserInfo对象
10             UserInfo userInfo = new UserInfo();
11             userInfo.Id = Convert.ToInt32(dt.Rows[0]["Id"]);
12             userInfo.Age = Convert.ToInt32(dt.Rows[0]["Age"]);
13             userInfo.UserName = dt.Rows[0]["UserName"].ToString();
14             ViewData.Model = userInfo;
15             return View();
16         }
17 
18         //只是显示用户修改的页面
19         [HttpPost]
20         public ActionResult Edit(int Id, int Age, string UserName, UserInfo userInfo)
21         {
22             string updateSql = "update UserInfo set UserName=@UserName,Age=@Age where Id=@Id";
23             SqlParameter idParameter = new SqlParameter("@Id", userInfo.Id);
24             SqlParameter ageParameter = new SqlParameter("@Age", userInfo.Age);
25             SqlParameter nameParameter = new SqlParameter("@UserName", userInfo.UserName);
26             SqlHelper.ExecuteNonQuery(updateSql, idParameter, ageParameter, nameParameter);
27             return RedirectToAction("Index");
28         }
29         #endregion
    后台代码
     1 <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<MvcUserDemo.Models.UserInfo>" %>
 2 
 3 <!DOCTYPE html>
 4 
 5 <html>
 6 <head runat="server">
 7     <meta name="viewport" content="width=device-width" />
 8     <title>Edit</title>
 9     <script src="../../Scripts/jquery-1.8.2.min.js"></script>
10     <script>
11         $(function () {
12             $("#xiugai").click(function () {
13 
14                 return confirm("请问是否修改此数据?");
15             });
16         
17         });
18            
19         </script>
20 </head>
21 <body>
22 
23     <%using (Html.BeginForm())
24       {%>
25     <table>
26         <tr>
27             <td>用户编号:</td>
28             <td><%:Model.Id %>
29                 <%:Html.HiddenFor(u=>u.Id)%>
30             </td>
31         </tr>
32         <tr>
33             <td>用户名:</td>
34             <td><%:Html.TextBoxFor(u=>u.UserName) %></td>
35             <tr>
36         <tr>
37             <td>年龄:</td>
38             <td><%:Html.TextBoxFor(u=>u.Age)%></td>
39         </tr>
40         <tr>
41             <td colspan="2">
42                 <input type="submit" value="修改" id="xiugai" /></td>
43         </tr>
44 
45     </table>
46     <%} %>
47 </body>
48 </html>
    前台代码
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  • 原文地址：https://www.cnblogs.com/qinsilandiao/p/4964505.html
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