将ado.net的cs文件SqlHelper.cs放入解决方案
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
namespace MvcUserDemo
{
public static class SqlHelper
{
public static readonly string connstr =
ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
public static SqlConnection OpenConnection()
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
return conn;
}
public static int ExecuteNonQuery(string cmdText,
params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
return ExecuteNonQuery(conn, cmdText, parameters);
}
}
public static object ExecuteScalar(string cmdText,
params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
return ExecuteScalar(conn, cmdText, parameters);
}
}
public static DataTable ExecuteDataTable(string cmdText,
params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
return ExecuteDataTable(conn, cmdText, parameters);
}
}
public static int ExecuteNonQuery(SqlConnection conn,string cmdText,
params SqlParameter[] parameters)
{
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteNonQuery();
}
}
public static object ExecuteScalar(SqlConnection conn, string cmdText,
params SqlParameter[] parameters)
{
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteScalar();
}
}
public static DataTable ExecuteDataTable(SqlConnection conn, string cmdText,
params SqlParameter[] parameters)
{
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))
{
DataTable dt = new DataTable();
adapter.Fill(dt);
return dt;
}
}
}
public static object ToDBValue(this object value)
{
return value == null ? DBNull.Value : value;
}
public static object FromDBValue(this object dbValue)
{
return dbValue == DBNull.Value ? null : dbValue;
}
}
}
SqlHelper
在web.config中配置连接数据库文件
<connectionStrings>
<add name="connstr" connectionString="server=.;uid=sa;pwd=321654;database=DemoDb"/>
</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
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace MvcUserDemo.Controllers
{
public class UserInfoController : Controller
{
//
// GET: /UserInfo/
public ActionResult Index()
{
//获取数据库中的UserInfo表中的数据
DataTable dt=SqlHelper.ExecuteDataTable("select Id, UserName, Age from dbo.UserInfo");
//把数据传递到前台页面进行展示
ViewData["dt"] = dt;
return View();
}
}
}
UserInfoController.cs
前台页面展示数据库中的数据
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html>
<html>
<head runat="server">
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
<%
DataTable dt = (DataTable)ViewData["dt"];
%>
<table>
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
</tr>
<%foreach (DataRow dataRow in dt.Rows)
{%>
<tr>
<td />
<%:dataRow["Id"] %><td />
<td />
<%:dataRow["UserName"]%><td />
<td><%:dataRow["Age"]%>
<td />
</tr>
<%}%>
</table>
</div>
</body>
</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)
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
using System.Data.SqlClient;
namespace MvcUserDemo.Controllers
{
public class UserInfoController : Controller
{
#region 用户列表
//
// GET: /UserInfo/
public ActionResult Index()
{
//获取数据库中的UserInfo表中的数据
DataTable dt = SqlHelper.ExecuteDataTable("select Id, UserName, Age from dbo.UserInfo");
//把数据传递到前台页面进行展示
ViewData["dt"] = dt;
return View();
}
#endregion
#region 用户注册页面
public ActionResult Add()
{
return View();
}
#endregion
//用户注册方法
public ActionResult ProcessAdd(FormCollection collection)
{
// 拿到表单里面传递过来的数据
string userName = Request["UserName"];
int Age = Convert.ToInt32(Request["Age"]);
//int Age = int.Parse(collection["Age"] ?? "0");
//往数据库插入数据
string insertSql = "insert UserInfo values(@UserName,@Age)";
SqlHelper.ExecuteNonQuery(insertSql,
new SqlParameter("@UserName", userName),
new SqlParameter("@Age", Age));
// return Content("OK");
return RedirectToAction("Index");
}
}
}
ProcessAdd
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>
<!DOCTYPE html>
<html>
<head runat="server">
<meta name="viewport" content="width=device-width" />
<title>用户注册</title>
</head>
<body>
<div>
<form method="post" action="/UserInfo/ProcessAdd">
<table>
<tr>
<td>用户名：</td>
<td>
<input type="text" name="UserName"></td>
</tr>
<tr>
<td>年龄：</td>
<td>
<input type="text" name="Age"></td>
</tr>
<tr>
<td colspan=">
<input type="submit" value="用户注册"></td>
</tr>
</table>
</form>
</div>
</body>
</html>
用户注册前台页面
强类型视图
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace MvcUserDemo.Models
{
public class UserInfo
{
public string UserName { get; set; }
public int Id { get; set; }
public int Age { get; set; }
}
}
创建一个类
(显示用户)显示models中的数据
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
using System.Data.SqlClient;
using MvcUserDemo.Models;
namespace MvcUserDemo.Controllers
{
public class UserInfoController : Controller
{
#region 用户列表
//
// GET: /UserInfo/
public ActionResult Index()
{
//获取数据库中的UserInfo表中的数据
DataTable dt = SqlHelper.ExecuteDataTable("select Id, UserName, Age from dbo.UserInfo");
//把数据传递到前台页面进行展示
ViewData["dt"] = dt;
return View();
}
#endregion
#region 用户注册页面
public ActionResult Add()
{
return View();
}
#endregion
//用户注册方法
public ActionResult ProcessAdd(FormCollection collection)
{
// 拿到表单里面传递过来的数据
string userName = Request["UserName"];
int Age = Convert.ToInt32(Request["Age"]);
//int Age = int.Parse(collection["Age"] ?? "0");
//往数据库插入数据
string insertSql = "insert UserInfo values(@UserName,@Age)";
SqlHelper.ExecuteNonQuery(insertSql,
new SqlParameter("@UserName", userName),
new SqlParameter("@Age", Age));
// return Content("OK");
return RedirectToAction("Index");
}
#region 显示用户
public ActionResult Show()
{
UserInfo userInfo = new UserInfo();
userInfo.Id = ;
userInfo.UserName = "你懂的";
userInfo.Age = ;
ViewData.Model = userInfo;
return View();
}
#endregion
}
}
后台代码
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<MvcUserDemo.Models.UserInfo>" %>
<%@ Import Namespace="MvcUserDemo.Models" %>
<!DOCTYPE html>
<html>
<head runat="server">
<meta name="viewport" content="width=device-width" />
<title>Show</title>
</head>
<body>
<div>
<table>
<tr>
<td>ID:</td>
<td><%:Model.Id %></td>
<td>姓名:</td>
<td><%:Model.UserName %></td>
<td>年龄:</td>
<td><%:Model.Age %></td>
</tr>
</table>
</div>
<%:Html.ActionLink("回到首页","Index") %>
</body>
</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
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html>
<html>
<head runat="server">
<meta name="viewport" content="width=device-width" />
<title>Index</title>
<script src="../../Scripts/jquery-1.8.2.min.js"></script>
<script>
$(function () {
$("a:contains('删除')").click(function () {
return confirm("请问是否删除此数据?");
});
});
</script>
</head>
<body>
<div>
<%
DataTable dt = (DataTable)ViewData["dt"];
%>
<table>
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
<th>删除</th>
</tr>
<%foreach (DataRow dataRow in dt.Rows)
{%>
<tr>
<td />
<%:dataRow["Id"] %><td />
<td />
<%:dataRow["UserName"]%><td />
<td><%:dataRow["Age"]%>
<td />
<td><%:Html.ActionLink("删除", "Delete", "UserInfo", new { Id = dataRow["Id"] }, new { })%>
<td />
</tr>
<%}%>
</table>
</div>
</body>
</html>
在UserInfo中添加一个新的方法
#region 删除
public ActionResult Delete(int Id)
{
//根据Id删除用户的数据
string sql = "delete from UserInfo where Id=@Id";
SqlHelper.ExecuteNonQuery(sql, new SqlParameter("@Id", Id));
//页面跳转到删除后的首页
return RedirectToAction("Index");
}
#endregion
后台代码
用户的修改
#region 修改用户
[HttpGet]
public ActionResult Edit(int Id)
{
string sql = "select UserName,Id,Age from UserInfo where Id=@Id";
DataTable dt = SqlHelper.ExecuteDataTable(sql, new SqlParameter("@Id", Id));
//把dt转成UserInfo对象
UserInfo userInfo = new UserInfo();
userInfo.Id = Convert.ToInt32(dt.Rows[]["Id"]);
userInfo.Age = Convert.ToInt32(dt.Rows[]["Age"]);
userInfo.UserName = dt.Rows[]["UserName"].ToString();
ViewData.Model = userInfo;
return View();
}
//只是显示用户修改的页面
[HttpPost]
public ActionResult Edit(int Id, int Age, string UserName, UserInfo userInfo)
{
string updateSql = "update UserInfo set UserName=@UserName,Age=@Age where Id=@Id";
SqlParameter idParameter = new SqlParameter("@Id", userInfo.Id);
SqlParameter ageParameter = new SqlParameter("@Age", userInfo.Age);
SqlParameter nameParameter = new SqlParameter("@UserName", userInfo.UserName);
SqlHelper.ExecuteNonQuery(updateSql, idParameter, ageParameter, nameParameter);
return RedirectToAction("Index");
}
#endregion
后台代码
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<MvcUserDemo.Models.UserInfo>" %>
<!DOCTYPE html>
<html>
<head runat="server">
<meta name="viewport" content="width=device-width" />
<title>Edit</title>
<script src="../../Scripts/jquery-1.8.2.min.js"></script>
<script>
$(function () {
$("#xiugai").click(function () {
return confirm("请问是否修改此数据?");
});
});
</script>
</head>
<body>
<%using (Html.BeginForm())
{%>
<table>
<tr>
<td>用户编号:</td>
<td><%:Model.Id %>
<%:Html.HiddenFor(u=>u.Id)%>
</td>
</tr>
<tr>
<td>用户名:</td>
<td><%:Html.TextBoxFor(u=>u.UserName) %></td>
<tr>
<tr>
<td>年龄:</td>
<td><%:Html.TextBoxFor(u=>u.Age)%></td>
</tr>
<tr>
<td colspan=">
<input type="submit" value="修改" id="xiugai" /></td>
</tr>
</table>
<%} %>
</body>
</html>
前台代码