js的
var xmlHTTP;
//检测用户名是否存在
function CheckName(userName)
{
createXMLHTTP();
var url = "rh_userRegEvent.aspx?name='"+userName+"'&Event=check";
xmlHTTP.Open("GET",url,true);
xmlHTTP.onreadystatechange=checkUserName;
xmlHTTP.send(null);
}
// 注册用户
function regUser(userName,userPwd)
{
createXMLHTTP();
userName = document.getElementById("userName").value;
userPwd = document.getElementById("userPwd").value;
if(userName=="")
{
window.alert("用户名不能为空!");
document.getElementById("userName").focus();
return false;
}
if(userPwd=="")
{
window.alert("密码不能为空!");
document.getElementById("userPwd").focus();
return false;
}
var url = "rh_userRegEvent.aspx?name='"+userName+"'&pwd='"+userPwd+"'&Event=Reg";
xmlHTTP.Open("GET",url,true);
xmlHTTP.onreadystatechange=regUserInfo;
xmlHTTP.send(null);
}
function createXMLHTTP()
{
if(window.XMLHttpRequest)
{
//xmlHTTP = new XMLHttpRequest();
xmlHTTP = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.ActiveXObject)
{
try
{
xmlHTTP = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
}
try
{
xmlHTTP = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
}
}
// if (typeof(xmlHttp) == "undefined")
// {
// alert("不能创建XMLHttp对象实例！");
// return false;
// }
}
// 回调函数
function checkUserName()
{
if(xmlHTTP.readystate==4)
{
if(xmlHTTP.status==200)
{
if(xmlHTTP.responseText == "true")
{
document.getElementById("imgName").src = "../images/icon/true.gif";
document.getElementById("btnReg").disabled = false;
}
if(xmlHTTP.responseText == "false")
{
document.getElementById("imgName").src="../images/icon/false.gif";
document.getElementById("btnReg").disabled=true;
}
}
}
}
//回调函数
function regUserInfo()
{
if(xmlHTTP.readystate==4)
{
if(xmlHTTP.status==200)
{
if(xmlHTTP.responseText=="true")
{
document.getElementById("userName").value = "";
document.getElementById("userPwd").value = "";
window.alert("注册成功！！");
}
if(xmlHTTP.responseText=="false")
{
window.alert("注册失败！！");
}
}
}
}
主界面的
<head runat="server">
<title>无标题页</title>
<script src="../js/CreateObject.js" type="text/javascript"></script>
<link rel="Stylesheet" type="text/css" href="../css/css.css" />
</head>
<body onload="document.getElementById('userName').focus()">
<form id="form1" runat="server">
<div>
<div style="margin-top:20px" align="center">无刷新的用户注册</div><br /><br />
<table align="center" style=" 442px; height: 145px">
<tr>
<td style=" 100px">
用户名：
</td>
<td style=" 100px">
<input id="userName" type="text" onkeyup="CheckName(document.getElementById('userName').value);" /></td>
<td style=" 100px">
<img src="" id="imgName" alt=""/></td>
</tr>
<tr>
<td style=" 100px">
密码：</td>
<td style=" 100px">
<input id="userPwd" type="text" /></td>
<td style=" 100px">
</td>
</tr>
<tr>
<td colspan="3">
<input id="btnReg" style=" 69px" type="button" value="注册" onclick="regUser();" /></td>
</tr>
</table>
</div>
</form>
</body>
请求界面的[color=#FF0000][/color]
User user = new User();
if (Request.QueryString["Event"].ToString() == "check")
{
if (user.checkName(Request.QueryString["name"].ToString()))
{
Response.Write("true");
Response.End();
}
else
{
Response.Write("false");
Response.End();
}
}
if (Request.QueryString["Event"].ToString() == "Reg")
{
if (user.regUser(Request.QueryString["name"].ToString(), Request.QueryString["pwd"].ToString()))
{
Response.Write("true");
Response.End();
}
else
{
Response.Write("false");
Response.End();
}
}
还有一个类
public class User
{
public User()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
public ArrayList getUser(string userName)
{
SqlConnection con = SqlConString.getConnnectionString();
con.Open();
string sql = "select UserName from tUser where UserName = '" + userName + "'";
SqlCommand cmd = new SqlCommand(sql, con);
SqlDataReader dr = cmd.ExecuteReader();
ArrayList al = new ArrayList();
while (dr.Read())
{
al.Add(dr["UserName"].ToString());
}
dr.Close();
con.Close();
return al;
}
public bool checkName(string userName)
{
SqlConnection con = SqlConString.getConnnectionString();
con.Open();
string sql = "select * from tUser where UserName = " + userName + "";
SqlDataAdapter sda = new SqlDataAdapter(sql,con);
DataSet ds = new DataSet();
sda.Fill(ds);
int m = ds.Tables[0].Rows.Count;
if (m <= 0)
{
return true;
}
else
{
return false;
}
}
public bool regUser(string userName, string userPwd)
{
SqlConnection con = SqlConString.getConnnectionString();
con.Open();
SqlCommand cmd = new SqlCommand("insert into tUser(UserName,UserPwd) values (" + userName + "," + userPwd + ")", con);
int i = cmd.ExecuteNonQuery();
if (i > 0)
{
return true;
}
else
{
return false;
}
}
}