关于用户验证的有关问题
日期：2014-05-18 浏览次数：20373 次
关于用户验证的问题
CS文件
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string name = this.Request.QueryString["name"];
if (name != null)
{
OleDbConnection con = new OleDbConnection("Provider=Microsoft.jet.OLEDB.4.0;Data Source=" + Server.MapPath("App_Data/DB_SP.mdb"));
string sqlstr = "select Count([Name]) from Member1 where [Name]=@Name";
OleDbCommand cmd = new OleDbCommand(sqlstr, con);
cmd.Parameters.Add("@Name",OleDbType.VarChar,50).Value=name;
con.Open();
int count = (int)cmd.ExecuteScalar();
con.Close();
if (count==0)
{
Label1.Text = "该用户名可以使用";
}
else
{
Label1.Text = "该用户名已经被占用，请使用其他用户名";
}
}
}
}
aspx文件
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script type="text/javascript">
var xmlHttp = false;
/*@cc_on @*/
if (@_jscript_version >= 5)
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
if(!xmlhttp)
{
alert("出错拉！");
}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
function Validation()
{
var text=document.getElementById("TextBox1");
xmlHttp.open("Post","Default.aspx?name="+text.value);
xmlHttp.onreadystatechange=OnMessageBack;
xmlHttp.send(null);
}
function OnMessageBack()
{
//判断请求状态及HTTP状态是否都能满足条件
if (xmlHttp.readystate==4&&xmlHttp.status==200)
{
//将返回的文本打印到页面上
var response=xmlHttp.responseText;
document.write(response);
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Te
CS文件
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string name = this.Request.QueryString["name"];
if (name != null)
{
OleDbConnection con = new OleDbConnection("Provider=Microsoft.jet.OLEDB.4.0;Data Source=" + Server.MapPath("App_Data/DB_SP.mdb"));
string sqlstr = "select Count([Name]) from Member1 where [Name]=@Name";
OleDbCommand cmd = new OleDbCommand(sqlstr, con);
cmd.Parameters.Add("@Name",OleDbType.VarChar,50).Value=name;
con.Open();
int count = (int)cmd.ExecuteScalar();
con.Close();
if (count==0)
{
Label1.Text = "该用户名可以使用";
}
else
{
Label1.Text = "该用户名已经被占用，请使用其他用户名";
}
}
}
}
aspx文件
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script type="text/javascript">
var xmlHttp = false;
/*@cc_on @*/
if (@_jscript_version >= 5)
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
if(!xmlhttp)
{
alert("出错拉！");
}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
function Validation()
{
var text=document.getElementById("TextBox1");
xmlHttp.open("Post","Default.aspx?name="+text.value);
xmlHttp.onreadystatechange=OnMessageBack;
xmlHttp.send(null);
}
function OnMessageBack()
{
//判断请求状态及HTTP状态是否都能满足条件
if (xmlHttp.readystate==4&&xmlHttp.status==200)
{
//将返回的文本打印到页面上
var response=xmlHttp.responseText;
document.write(response);
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Te
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