Ajax的注册小示例

Code
 1 using System;
 2 using System.Data;
 3 using System.Configuration;
 4 using System.Web;
 5 using System.Web.Security;
 6 using System.Web.UI;
 7 using System.Web.UI.WebControls;
 8 using System.Web.UI.WebControls.WebParts;
 9 using System.Web.UI.HtmlControls;
10 using System.Data.SqlClient;
11 
12 /// <summary>
13 /// Connection 的摘要说明
14 /// </summary>
15 public class Connection
16 {
17     public Connection()
18     {
19         //
20         // TODO: 在此处添加构造函数逻辑
21         //
22     }
23 
24     public static SqlConnection getConnection()
25     {
26         return new SqlConnection (System .Configuration .ConfigurationManager .ConnectionStrings ["ConnectionString"].ConnectionString );
27     }
28 }
29 

User类
  1 using System;
  2 using System.Data;
  3 using System.Configuration;
  4 using System.Web;
  5 using System.Web.Security;
  6 using System.Web.UI;
  7 using System.Web.UI.WebControls;
  8 using System.Web.UI.WebControls.WebParts;
  9 using System.Web.UI.HtmlControls;
 10 using System.Data.SqlClient;
 11 
 12 /// <summary>
 13 /// User 的摘要说明
 14 /// </summary>
 15 public class User
 16 {
 17     public User()
 18     {
 19         //
 20         // TODO: 在此处添加构造函数逻辑
 21         //
 22     }
 23 
 24     /// <summary>
 25     /// 检测用户是否存在
 26     /// </summary>
 27     /// <param name="userName">用户名</param>
 28     /// <returns>bool</returns>
 29     public bool checkName(string userName)
 30     {
 31         SqlConnection userConnection = Connection.getConnection();
 32         SqlCommand userCommand = new SqlCommand("checkName", userConnection);
 33 
 34         userCommand.CommandType = CommandType.StoredProcedure;
 35         userCommand.Parameters.Add("@userName", SqlDbType.VarChar, 50);
 36         userCommand.Parameters["@userName"].Value = userName;
 37         userCommand.Connection.Open();
 38         int n = (int)userCommand.ExecuteScalar();
 39         userCommand.Connection.Close();
 40 
 41         if (n > 0)
 42         {
 43             return true;
 44         }
 45         else
 46         {
 47             return false;
 48         }
 49     }
 50 
 51     /// <summary>
 52     /// 插入用户
 53     /// </summary>
 54     /// <param name="userName">用户名</param>
 55     /// <param name="userPwd">密码</param>
 56     /// <returns></returns>
 57     public bool insertUserInfo(string userName, string userPwd)
 58     {
 59         SqlConnection userConnection = Connection.getConnection();
 60         SqlCommand userCommand = new SqlCommand("insertUserInfo", userConnection);
 61 
 62         userCommand.CommandType = CommandType.StoredProcedure;
 63         userCommand.Parameters.Add("@userName", SqlDbType.VarChar, 50);
 64         userCommand.Parameters["@userName"].Value = userName;
 65 
 66         userCommand.Parameters.Add("@userPwd", SqlDbType.VarChar, 50);
 67         userCommand.Parameters["@userPwd"].Value = userPwd;
 68 
 69         userCommand.Connection.Open();
 70         userCommand.ExecuteNonQuery();
 71 
 72         userCommand.Connection.Close();
 73         return true;
 74     }
 75 
 76     /// <summary>
 77     /// 查询用户信息
 78     /// </summary>
 79     /// <returns>SqlDataReader</returns>
 80     public SqlDataReader selectUserInfo()
 81     {
 82         SqlConnection userConnection = Connection.getConnection();
 83         SqlCommand userCommand = new SqlCommand("select * from UserInfo",userConnection );
 84         userCommand.Connection.Open() ;
 85         return userCommand.ExecuteReader();
 86 
 87     }
 88 
 89     /// <summary>
 90     /// 删除用户
 91     /// </summary>
 92     /// <param name="userName">用户名</param>
 93     /// <returns>bool</returns>
 94     public bool deleteUser(string userName)
 95     {
 96         SqlConnection userConnection = Connection.getConnection();
 97         SqlCommand userCommand = new SqlCommand("deleteUser", userConnection);
 98         userCommand.CommandType = CommandType.StoredProcedure;
 99 
100         userCommand.Parameters.Add("@userName", SqlDbType.VarChar, 50);
101         userCommand.Parameters["@userName"].Value = userName;
102 
103         userCommand.Connection.Open();
104 
105         userCommand.ExecuteNonQuery();
106         userCommand.Connection.Close();
107 
108         return true;
109     }
110 
111     /// <summary>
112     /// 更新用户信息
113     /// </summary>
114     /// <param name="userName"></param>
115     /// <param name="userPwd"></param>
116     /// <returns></returns>
117     public bool updateUserInfo(string userName, string userPwd)
118     {
119         SqlConnection userConnection = Connection.getConnection();
120         SqlCommand userCommand = new SqlCommand("updateUserInfo", userConnection);
121         userCommand.CommandType = CommandType.StoredProcedure;
122         userCommand.Parameters.Add("@userName", SqlDbType.VarChar, 50);
123         userCommand.Parameters["@userName"].Value = userName;
124         userCommand.Parameters.Add("@userPwd", SqlDbType.VarChar, 50);
125         userCommand.Parameters["@userPwd"].Value = userPwd;
126 
127         userCommand.Connection.Open();
128         userCommand.ExecuteNonQuery();
129         userCommand.Connection.Close();
130 
131         return true;
132     }
133 }
134 

Default.aspx
 1<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
 2
 3<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 4<html xmlns="http://www.w3.org/1999/xhtml">
 5<head runat="server">
 6    <title></title>
 7<script language ="javascript" src="CreateObject.js"></script>
 8</head>
 9<body>
10    <form id="form1" runat="server">
11        <div style="text-align: center">
12            <table style=" 420px; height: 256px; text-align: center;" id="TABLE1" onclick="return TABLE1_onclick()">
13                
14                <tr>
15                    <td style=" 69px; height: 21px; border: 1px; text-align: center;">
16                        <asp:Label ID="lblUserName" runat="server" Text="用户名："></asp:Label></td>
17                    <td style=" 69px; height: 21px; border: 1px;">
18                        <input id="txtUserName" type="text" onkeyup="CheckName(document.getElementById('txtUserName').value);" /></td>
19                        <td>
20                            <img id="imgName" src="" /></td>
21                </tr>
22                <tr>
23                    <td style=" 69px; height: 21px; border: 1px;">
24                        <asp:Label ID="lblUserPwd" runat="server" Text="密码："></asp:Label></td>
25                    <td style=" 69px; height: 21px; border: 1px;">
26                        <input id="txtUserPwd" type="text" /></td>
27                        <td>
28                            </td>
29                </tr>
30                <tr>
31                    <td style=" 69px; height: 21px; border: 1px;">
32                        <asp:Label ID="lblUserPwdRe" runat="server" Text="重复密码:"></asp:Label></td>
33                    <td style=" 69px; height: 21px; border: 1px;">
34                        <input id="txtUserPwdRe" type="text" />
35                    </td>
36                        <td>
37                            </td>
38                </tr>
39                <tr>
40                    <td colspan="3" style="border-top- 1px; border-left- 1px; border-bottom- 1px;
41                        height: 21px; border-right- 1px">
42                        <input id="btnOk" style=" 90px" type="button" value="OK" /></td>
43                </tr>
44            </table>
45        </div>
46    </form>
47</body>
48</html>
49

  1// JScript 文件
  2var xmlHttp;
  3
  4//检测用户是否存在
  5function CheckName(userName)
  6{
  7    createXMLHTTP();
  8    var url="DisposeEvent.aspx?Name="+userName+"&Event=Check";
  9    xmlHttp.open("GET",url,true);
 10    xmlHttp.onreadystatechange=checkUserName;
 11    xmlHttp.send(null);
 12}
 13
 14function createXMLHTTP()
 15{
 16    if(window.XMLHttpRequest)
 17    {
 18        xmlHttp = new XMLHttpRequest();
 19    }
 20    else if(window.ActiveXObject)
 21    {
 22        try
 23        {
 24            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
 25        }
 26        catch(e)
 27        {}
 28        
 29        try
 30        {
 31        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
 32        }
 33        catch(e)
 34        {}
 35        
 36        if(!xmlHttp)
 37        {
 38            window.alert("不能创建XMLHttpRequest");
 39            return false;
 40        }
 41    }
 42}
 43
 44function checkUserName()
 45{
 46    if(xmlHttp.readyState == 4)
 47    {
 48        if(xmlHttp.status==200)
 49        {
 50            if(xmlHttp.responseText == "true")
 51            {
 52                document.getElementById("imgName").src="images/true.gif";
 53                
 54                //注册按钮=false
 55                document.getElementById("btnOk").disabled = false;
 56            }
 57            else 
 58            {
 59                document.getElementById("imgName").src="images/flase.gif";
 60                document.getElementById("btnOk").disabled = true;
 61            }
 62        }
 63    }
 64}
 65
 66
 67//注册新用户
 68function regUser()
 69{
 70    if(document.getElementById("txtUserName").value=="")
 71    {
 72        alert("对不起，用户名不能为空！");
 73        return false;
 74    }
 75    
 76    if(document.getElementById("txtUserPwd").value="")
 77    {
 78        alert("对不起，密码不能为空");
 79        return false;
 80    }
 81    
 82    var url="DisposeEvent.aspx?Name="+document.getElementById("userName").value+"&Pwd="+document.getElementById("txtUserPwd").value+"&Event=Reg";
 83    xmlHttp.open("GET",url,true);
 84    xmlHttp.onreadystatechange=regUserInfo;
 85    xmlHttp.send(null);
 86}
 87
 88//注册用户回调函数
 89function regUserInfo()
 90{
 91    if(xmlHttp.readyState==4)
 92    {
 93        if(xmlHttp.status == 200)
 94        {
 95            if(xmlHttp.responseText=="true")
 96            {
 97                alert("恭喜，新用户注册成功。");
 98                document.getElementById("txtUserName").value="";
 99                document.getElementById("txtUserPwd").value="";
100            }
101            else
102            {
103                alert("对不起，注册失败");
104                document.getElementById("txtUserName").value="";
105                document.getElementById("txtUserPwd").value="";
106            }
107        }
108    }
109}
110
111

 1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Collections;
 5using System.Web;
 6using System.Web.Security;
 7using System.Web.UI;
 8using System.Web.UI.WebControls;
 9using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11using System.Data.SqlClient;
12
13public partial class DisposeEvent : System.Web.UI.Page
14{
15    protected void Page_Load(object sender, EventArgs e)
16    {
17        User user= new User();
18
19        //是否为执行checkName的方法
20        if (Request.QueryString["Event"].ToString() == "Check")
21        {
22            if (user.checkName(Request.QueryString["Name"].ToString()))
23            {
24                //当数据库已经存在此用户
25                Response.Write("false");
26                Response.End();
27            }
28            else
29            {
30                Response.Write("true");
31                Response.End();
32            }
33        }
34
35        //是否为执行regUser方法
36        if (Request.QueryString["Event"].ToString() == "Reg")
37        {
38            if (user.insertUserInfo(Request.QueryString["Name"].ToString(), Request.QueryString["Pwd"].ToString()))
39            {
40                Response.Write("true");
41                Response.End();
42            }
43        }
44    }
45
46}
47

 1set ANSI_NULLS ON
 2set QUOTED_IDENTIFIER ON
 3go
 4
 5ALTER PROCEDURE [dbo].[checkName]
 6    @userName varchar(50)
 7AS
 8SELECT COUNT(*) FROM UserInfo
 9WHERE UserName=@userName
10

 1set ANSI_NULLS ON
 2set QUOTED_IDENTIFIER ON
 3go
 4
 5ALTER PROCEDURE [dbo].[deleteUser]
 6    @userName varchar(50)
 7AS
 8DELETE FROM UserInfo WHERE UserName=@userName
 9return
10

 1 set ANSI_NULLS ON
 2 set QUOTED_IDENTIFIER ON
 3 go
 4 
 5 ALTER PROCEDURE [dbo].[insertUserInfo]
 6     @userName varchar(50),
 7     @userPwd varchar(50)
 8 AS
 9 INSERT INTO UserInfo VALUES(@userName,@userPwd)
10 return
11 
12 

 1 set ANSI_NULLS ON
 2 set QUOTED_IDENTIFIER ON
 3 go
 4 
 5 ALTER PROCEDURE [dbo].[updateUserInfo]
 6     @userName varchar(50),
 7     @userPwd varchar(50)
 8 AS
 9 UPDATE UserInfo SET UserPwd=@userPwd
10 WHERE UserName=@userName
11 return
12 
13