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shine_fly 2011-03-28
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> 用户注册 </TITLE>
</HEAD>
<style>
<!--
body,td {font-size:12px;}
input{background-color: #ffffff; color: #000000; font-family: tahoma; font-size: 12px; border: 1px #cccccc double}
-->
</style>
<BODY>
<script language=javascript>
<!--
function checkUserName()
{
username=this.form1.username.value;
var xmlhttp;
try
{
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
try
{
xmlhttp=new XMLHttpRequest();
}
catch (e)
{
}
}
}
if (username=="")
{
msg="用户名不能为空";
var ch=document.getElementById("check1");
ch.innerHTML="<font color='#aaaaaa'>"+msg+"</font>";
return false;
}
//创建请求，并使用escape对username编码，以避免乱码
xmlhttp.open("get","checkuser.asp?username="+escape(username)+ "&t=" + new Date().getTime());
xmlhttp.onreadystatechange=function()
{
if(4==xmlhttp.readyState)
{
if(200==xmlhttp.status)
{
if (xmlhttp.responseText=="yes")
{
msg="此用户名已经存在";
}
else
{
msg="输入正确";
}
}
else
{
msg="网络链接失败";
}
var ch=document.getElementById("check1");
ch.innerHTML="<font color='#aaaaaa'>"+msg+"</font>";
}
}
xmlhttp.send(null);
return false;
}
//-->
</script>
<script language="javascript">
function checkpass1()
{
var Inform="form1";
var Inputname="password1";
var Form=Inform+"."
eval("Temp="+Form+Inputname+".value;");
//alert(Temp);
if(Temp==""){
msg="此项不能为空";
}
else
{
if(Temp.length<6||Temp.length>20)
{
msg="密码必须在6~20个字符之间";
}
else
{
var Inputname1="password";
eval("Temp1="+Form+Inputname1+".value");
if (Temp!=Temp1)
{
eval(Form+Inputname+".value='';");
eval(Form+Inputname1+".value='';");
eval(Form+Inputname1+".focus();");
msg="两次密码不一样！";
msg1="";
var ch1=document.getElementById("password2");
ch1.innerHTML="<font color='#aaaaaa'>"+msg1+"</font>";
}
else
{
msg="输入正确";
}
}
}
var ch=document.getElementById("password3");
ch.innerHTML="<font color='#aaaaaa'>"+msg+"</font>";
}
function checkpass()
{
var Inform="form1";
var Inputname="password";
var Form=Inform+"."
eval("Temp="+Form+Inputname+".value;");
//alert(Temp);
if(Temp==""){
msg="此项不能为空";
}
else
{
if(Temp.length<6||Temp.length>20)
{
msg="密码必须在6~20个字符之间";
}
else
{
msg="输入正确";
}
}
var ch=document.getElementById("password2");
ch.innerHTML="<font color='#aaaaaa'>"+msg+"</font>";
}
</script>
<script language=javascript>
function sendreg()
{
if(this.form1.username.value=="")
{
alert('请输入要注册的用户名');
this.form1.username.focus();
return false;
}
if(this.form1.password.value=="")
{
alert('请输入密码');
this.form1.password.focus();
return false;
}
else
{
if(this.form1.password.value.length<6||this.form1.password.value.length>20)
{
alert('密码长度必须在6~20个字符');
this.form1.password.focus();
return false;
}
}
if(this.form1.password1.value=="")
{
alert('请输入密码');
this.form1.password1.focus();
return false;
}
else
{
if(this.form1.password1.value.length<6||this.form1.password1.value.length>20)
{
alert('密码长度必须在6~20个字符');
this.form1.password1.focus();
return false;
}
}
if(this.form1.password.value!=this.form1.password1.value)
{
this.form1.password.value="";
this.form1.password1.value="";
this.form1.password.focus();
alert('两次密码不一样，请重新输入');
return false;
}
username=this.form1.username.value;
password=this.form1.password.value;
var xmlhttp;
try
{
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
try
{
xmlhttp=new XMLHttpRecordset();
}
catch (e)
{
}
}
}
//创建请求，并使用escape对username编码，以避免乱码
xmlhttp.onreadystatechange=function()
{
if(4==xmlhttp.readyState)
{
if(200==xmlhttp.status)
{
if (xmlhttp.responseText=="yes")
{
this.form1.username.value="";
this.form1.password.value="";
this.form1.password1.value="";
document.getElementById("check1").innerHTML="";
document.getElementById("password2").innerHTML="";
document.getElementById("password3").innerHTML="";
alert('注册成功');
}
else
{
this.form1.password.value="";
this.form1.password1.value="";
alert('注册失败');
}
}
else
{
alert('网络连接失败');
}
}
}
//打开连接
xmlhttp.open("post","reg.asp",true)
xmlhttp.setRequestHeader('Content-type','application/x-www-form-urlencoded');
//发送数据
xmlhttp.send("username="+escape(username)+"&password="+escape(password));
}
</script>
<div align="center">
<TABLE border=1 cellpadding=0 cellspacing=0 width=500>
<form name="form1" method="post">
<TR>
<TD colspan=2 align="center" height=25><b>用户注册</b></TD>
</TR>
<TR>
<TD align=right width=100>用户名</TD>
<TD align=left><input type=text size=30 name="username" onBlur="return checkUserName();"> <span id="check1"></span></TD>
</TR>
<TR>
<TD align=right>密码</TD>
<TD align=left><input type=password size=30 name="password" onBlur="checkpass();" maxlength=20> <span id="password2"></span></TD>
</TR>
<TR>
<TD align=right>确认密码</TD>
<TD align=left><input type=Password size=30 name="password1" onBlur="checkpass1();" maxlength=20> <span id="password3"></span></TD>
</TR>
<TR>
<TD align="center" colspan=2><input type="button" value="注册" onclick="return sendreg();" maxlength=20> <input type="reset" value="重置"></TD>
</TR>
</form>
</TABLE>
</div>
</BODY>
</HTML>
子夜__ 2011-03-28
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<%@ Page Language="C#" CodeFile="LoginValidate.aspx.cs" Inherits="LoginValidate" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>验证用户名是否存在</title>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
//处理方法
function CheckUserName()
{
createXMLHttpRequest();
var url= "LoginValidate.ashx?username="+document.getElementByIdx("username").value;
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=ShowResult;
xmlHttp.send(null);
//document.getElementByIdx("Msg").innerHTML='';
}
//回调方法
function ShowResult()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
document.getElementByIdx("Msg").innerHTML=xmlHttp.responseText;
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<table style="width: 487px">
<tr>
<td style="width: 70px">
用户名：</td>
<td style="width: 231px"><input id="username" type="text" />
<input id="Button1" type="button" value="button" onclick="CheckUserName();" /></td>
<td id="Msg"></td>
</tr>
<tr>
<td style="width: 70px">
</td>
<td style="width: 231px">
</td>
<td>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>using System;
using System.Web;
using System.Data;
using System.Data.SqlClient;
public class LoginValidate : IHttpHandler
{
public void ProcessRequest (HttpContext context)
{
context.Response.ContentType = "text/plain";
string username = context.Request.QueryString["username"].ToString();
string strSQL = "select username from users where username='" + username + "'";
if (ReDataSet(strSQL).Tables[0].Rows.Count > 0)
{
context.Response.Write("该用户已经有人使用！");
}
else
{
context.Response.Write("恭喜你！"+username+"可以使用！");
}
System.Threading.Thread.Sleep(3000);
}
//数据库连接字符串
public static string strCon = "Data Source=.;database=exam;uid=sa;pwd=;";
/// <summary>
/// 执行SQL语句，返回DataSet
/// </summary>
/// <param name="strSQL"></param>
/// <returns></returns>
public DataSet ReDataSet(string strSQL)
{
SqlConnection con = new SqlConnection(strCon);
try
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter(strSQL, con);
DataSet ds = new DataSet();
da.Fill(ds);
return ds;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
con.Close();
}
}
/// <summary>
/// 不重复调用
/// </summary>
public bool IsReusable
{
get
{
return false;
}
}
}
confidenceyu 2011-03-28
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没人知道？真悲剧。。。。
confidenceyu 2011-03-28
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可以说的具体点不，最好有代码
MSDNXGH 2011-03-28
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没用，注册的话只要就是那个用户名，用最简单的AJAX就可以了，文本失去焦点，就发送。返回结果，显示，有没有己存在用户
