我要评论页面初始化，界面如图所示：
server name文本框获取焦点时候，界面如图所示（这里可以改成你登录的验证码）：
可以加载sql server服务列表，也是我的简易sql查询分析器评论中静夜妙思给予的方法，非常感谢！
加载列表如下图所示：
可以随意地点击添加到server name中，登录时截图所示：
文本框验证都写好了！还有authentication验证方式，windows验证下面login,password文本框禁掉！由于时间原因，不上图了
demo.html(全部前台代码，js/css还没分文件存储)
复制代码 代码如下:
<!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">
<title>database test demo</title>
<link href="js/treeview/jquery.treeview.css" rel="stylesheet" type="text/css" />
<!--<script src="js/jquery-1.4.2-vsdoc.js" type="text/javascript"></script>-->
<script src="js/jquery-1.4.2.min.js" type="text/javascript"></script>
<script src="js/treeview/jquery.treeview.js" type="text/javascript"></script>
<style type="text/css">
body{margin:0 auto;font-family:verdana;font-size:12px;}
.top{margin:0 auto; width:100%; text-align:center; margin-top:20px;}
#browser{display:none;}
</style>
</head>
<body>
<div class="top"><h1>database test demo</h1></div>
<ul id="browser" class="databasetree">
<li ><span class="server">sql server</span>
<ul>
<li class="closed"><span class="folder">databases</span>
<ul>
<li class="closed"><span class="database">test</span>
<ul></ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<style type="text/css">
#greybackground{background: #000;display: block;z-index: 100;width: 100%;position: absolute;top: 0;left: 0; }
#login{margin:0 auto;width:420px;height:auto;border:solid 1px #ccc;position:absolute;z-index:200;background-color:#fff;}
#login .heard{width:420px; height:29px;background-image:url(images/top_bg.gif); border-bottom:solid 1px #ccc;}
#login .heard .left{float:left;line-height:29px;margin-right:2px;padding-left:10px; color:#5aa608;}
#login .heard .right{float:right;line-height:29px;margin-right:5px;}
#login .heard .right a{color:#999;text-decoration:none;}
#login .heard .right a:hover{color:red;text-decoration:underline;}
#login .content{width:420px; height:200px;}
#login .content li{ list-style:none; padding:5px 0px 5px 30px;}
#login .content .top{ width:100%; margin-top:5px;height:30px;line-height:30px;}
#login .content .top .left{ float:left;width:120px; text-align:right;}
#login .content .top .right{ float:right;width:280px;text-align:right;padding-right:20px;}
#login input,#login,select,#login,button{font-family:inherit;font-size:inherit;font-weight:inherit;*font-size:100%;}
#login input{width: 80%;padding: 7px 7px 6px;border-color: #b3b3b3 #eaeaea #eaeaea #b3b3b3;border-style: solid;border-width: 1px;color:black;}
#login select{width: 86%;padding: 7px 7px 6px; border-color: #b3b3b3 #eaeaea #eaeaea #b3b3b3;border-style: solid;border-width: 1px;color:black;}
#login button,#login .btn-submit,#login .button,#login .btn-submit:focus,#login .button:focus,.btn-submit,.button{border-left: 1px solid #c6c6c6;
border-right: 1px solid #dddddd;border-top: 1px solid #dddddd;border-bottom: 1px solid #c6c6c6;
cursor:pointer;width:auto;margin:0 10px 0 0;padding-bottom:3px;line-height:1.3em;
color:#515151;font-weight:bold;background:url(images/button.png) #e5e3e3 repeat-x 0 0;
height:32px;padding-left:12px;padding-right: 12px;padding-top: 6px;}
#login button:hover,#login .btn-submit:hover,.button:hover,.btn-submit:hover {background-image:none;}
#login .btn-submit,#login .btn-submit:focus,.btn-submit {width:auto;border-color:#5c91a4 #2b7089 #1a6480 #2a6f89;background-image:url(images/button_highlight.png);background-color:#4e85bb;color:#fff;}
#login .bottom-btn{width:90%; margin:0 auto; padding-top:7px; border-top:1px #ccc solid; margin-top:5px;}
#layer{position:relative;}
#poper{position:absolute;z-index:10;display:none;left:39px;border:solid 1px #ccc; background-color:#fff;}
#poper .heard{height:25px;line-height:25px; width:100%;text-align:right; }
#poper .heard a{color:#999;text-decoration:none;}
#poper .heard a:hover{color:red;text-decoration:underline;}
#poper .first{height:30px;line-height:30px; width:100%;text-align:center; color:#5aa608;}
#poper .first a{color:#5aa608;text-decoration:underline;}
#poper .second{height:20px;line-height:20px; width:100%;text-align:left; margin-left:10px;}
#poper .second a{color:#999; text-decoration:none;}
#poper .second a:hover{color:#5aa608; text-decoration:underline;}
</style>
<div id="login">
<div class="heard"><div class="left">connect to server</div><div class="right"><a href="javascript:void(0);" id="login_close" title="close">close</a></div></div>
<div class="content">
<div class="top">
<div class="left">server name:</div>
<div class="right">
<div id="layer">
<input id="txtserver" type="text" />
<div id="poper">
<div class="heard"><a id="layer_close" href="javascript:void(0);" title="close">close</a> </div>
<div class="first"><a id="loadserver" href="javascript:void(0);" title="点击加载sql server服务列表">点击加载sql server服务列表</a></div>
</div>
</div>
</div>
</div>
<div class="top"><div class="left">authentication:</div><div class="right"><select id="selectauthentication"><option value="windows">windows authentication</option><option value="sql" selected="selected">sql server authentication</option></select></div></div>
<div class="top"><div class="left">login:</div><div class="right"><input id="txtusername" type="text" /></div></div>
<div class="top"><div class="left">password:</div><div class="right"><input id="txtpassword" type="password" /></div></div>
<div class="bottom-btn"><input id="btnconnect" type="button" class="btn-submit" value="connect" /><input id="btncancel" type="button" class="button" value="cancel" /><font id="message"></font></div>
</div>
</div>
</body>
</html>
<script type="text/javascript">
$(document).ready(function() {
$("#browser").treeview();
$("#selectauthentication").change(function() {
if ($(this).val() == "windows") {
$("#txtusername,#txtpassword").css("background-color", "#eee");
$("#txtusername,#txtpassword").attr("disabled", "disabled");
} else {
$("#txtusername,#txtpassword").css("background-color", "#fff");
$("#txtusername,#txtpassword").removeattr("disabled");
}
});
$("#txtserver").focus(function() { $("#poper").fadein("fast"); });
$("#poper").css({ "top": $("#txtserver").outerheight() + 1, "width": $("#txtserver").outerwidth() });
$("#layer_close").click(function() {
$(this).parent().parent().fadeout("fast");
});
$("#loadserver").click(function() {
$.ajax({
type: "get",
datatype: "text",
timeout: 300000,
url: "ashx/handler.ashx",
data: "flag=server",
beforesend: function() { $("#loadserver").fadeout("fast"); $("#poper .first").html("<img src='images/ajax-loader.gif' title='正在加载中，请稍后……' />正在加载中，请稍后……") },
success: function(data) {
if (data == "error") {
$("#poper .first").html("<font color=red>服务列表加载失败，请刷新重新加载</font>");
} else if (data == "empty") {
$("#poper .first").html("<font color=red>没有数据，请手动填写</font>");
} else {
$("#poper .first").remove();
$("#poper").append(data);
alink();
}
},
error: function() { $("#poper .first").html("<font color=red>系统发生错误，请联系管理员！</font>"); }
});
});
})
$("#btnconnect").click(function() {
if ($("#selectauthentication").val() == "sql") { //sql server authentication
if ($("#txtserver").val().length < 1) {
$("#message").css("color", "red"); $("#message").html("请输入server name");
} else if ($("#txtusername").val().length < 1) {
$("#message").css("color", "red"); $("#message").html("请输入login");
} else if ($("#txtpassword").val().length < 1) {
$("#message").css("color", "red"); $("#message").html("请输入password");
} else {
$.ajax({
type: "get",
datatype: "text",
timeout: 300000,
url: "ashx/handler.ashx",
data: "flag=login&sqlserver=" + encodeuricomponent($("#txtserver").val()) + "&user=" + encodeuricomponent($("#txtusername").val()) + "&password=" + encodeuricomponent($("#txtpassword").val()),
beforesend: function() { $("#message").css("color", "#5aa608"); $("#message").html("<img src='images/ajax-loader.gif' title='正在加载中，请稍后……' />正在验证，请稍后……"); },
success: function(data) {
if (data == "true") {
$("#message").html("");
hidelogin();
$("#browser").fadein("fast");
}
},
error: function() { $("#message").css("color", "red"); $("#message").html("登录失败"); }
});
}
}
});
$(function() {
var screenwidth, screenheight, mytop, getposleft, getpostop
screenwidth = $(window).width();
screenheight = $(window).height();
//获取滚动条距顶部的偏移
mytop = $(document).scrolltop();
//计算弹出层的left
getposleft = screenwidth / 2 - 200;
//计算弹出层的top
getpostop = screenheight / 2 - 150;
//css定位弹出层
$("#login").css({ "left": getposleft, "top": getpostop });
//当浏览器窗口大小改变时
$(window).resize(function() {
screenwidth = $(window).width();
screenheight = $(window).height();
mytop = $(document).scrolltop();
getposleft = screenwidth / 2 - 200;
getpostop = screenheight / 2 - 150;
$("#login").css({ "left": getposleft, "top": getpostop + mytop });
});
//当拉动滚动条时，弹出层跟着移动
$(window).scroll(function() {
screenwidth = $(window).width();
screenheight = $(window).height();
mytop = $(document).scrolltop();
getposleft = screenwidth / 2 - 200;
getpostop = screenheight / 2 - 150;
$("#login").css({ "left": getposleft, "top": getpostop + mytop });
});
//点击关闭按钮
$("#login_close").click(function() {
hidelogin();
});
$("#btnok").click(function() {
$("#login").fadeout("slow");
$("#browser").fadein("slow");
//删除变灰的层
$("#greybackground").remove();
return false;
});
$.get("ashx/handler.ashx?flag=islogin", function(data) {
if (data == "true") {//没有登录，显示登录框
hidelogin();
} else {
showlogin();
}
});
});
function showlogin() {//显示登陆框
$("#login").fadein("slow");
//获取页面文档的高度
var docheight = $(document).height();
//追加一个层，使背景变灰
$("body").append("<div id='greybackground'></div>");
$("#greybackground").css({ "opacity": "0.5", "height": docheight });
return false;
}
function hidelogin() {
$("#login").fadeout("slow");
//删除变灰的层
$("#greybackground").remove();
return false;
}
function alink() {//生成的a追加click事件
$("#poper .second a").each(function() {
$(this).click(function() {
var a = $(this).html();
$("#txtserver").val(a);
});
});
}
</script>
handler.ashx
复制代码 代码如下:
<%@ webhandler language="c#" class="handler" %>
using system;
using system.web;
using system.collections.generic;
using system.text;
using system.web.sessionstate;
public class handler : ihttphandler,irequiressessionstate {
public void processrequest (httpcontext context) {
context.response.contenttype = "text/plain";
string tempvalue = string.empty;
if (context.request["flag"] == null)
context.response.write("error");
else
{
string flag = context.request["flag"];
switch (flag)
{
case "server":
tempvalue = this.getservers();
break;
case "islogin":
tempvalue = (context.session["login"] != null).tostring();//判断是否登录到sql
break;
case "login":
tempvalue = islogin(context);
break;
default:
tempvalue = "error";
break;
}
}
context.response.write(tempvalue);
}
/// <summary>
/// 加载sql server 服务列表
/// </summary>
/// <returns></returns>
private string getservers()
{
ilist<string> list = common.getservers();
if (list == null || list.count == 0) return "empty";
stringbuilder sb = new stringbuilder();
foreach (string s in list)
{
sb.appendformat("<div class=\"second\"><a href=\"javascript:void(0);\" title=\"{0}\">{0}</a></div>", s);
}
return sb.tostring();
}
/// <summary>
/// 登录sql server
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
private string islogin(httpcontext context)
{
if (context.request["user"] == null || context.request["password"] == null)
{
context.session["login"] = "success";
return "";
}
else
{
string server = httputility.urldecode(context.request["sqlserver"]);
string user = httputility.urldecode(context.request["user"]);
string password = httputility.urldecode(context.request["password"]);
string sqlconstring;
if (common.islogin(server, user, password, out sqlconstring))
{
context.session["login"] = sqlconstring;
return "true";
}
else
{
return "false";
}
}
}
public bool isreusable {
get {
return false;
}
}
}
common.cs
复制代码 代码如下:
using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.data.sql;
using system.data.sqlclient;
using system.data;
/// <summary>
/// summary description for common
/// </summary>
public class common
{
public common()
{
//
// todo: add constructor logic here
//
}
/// <summary>
/// 加载sql服务列表
/// </summary>
/// <returns></returns>
public static ilist<string> getservers()
{
ilist<string> list = new list<string>();
sqldatasourceenumerator sse = sqlclientfactory.instance.createdatasourceenumerator() as sqldatasourceenumerator;
if (sse == null) return null;
datatable dt = sse.getdatasources();
foreach (datarow dr in dt.rows)
{
string server = dr["servername"] as string;
string instance = dr["instancename"] as string;
if (string.isnullorempty(instance) || instance.toupper() == "mssqlserver")
list.add(server);
else
list.add(server + @"\" + instance);
}
return list;
}
/// <summary>
/// sql server authentication
/// </summary>
/// <param name="server">sql服务</param>
/// <param name="user">用户名</param>
/// <param name="password">密码</param>
/// <param name="sqlconstring">数据库连接字符串</param>
/// <returns></returns>
public static bool islogin(string server,string user,string password,out string sqlconstring)
{
sqlconstring = string.format("data source={0};initial catalog=master;persist security info=true;user id={1};password={2}", server, user, password);
return sqlhelper.loginsql(sqlconstring);
}
}
sqlhelper.cs
复制代码 代码如下:
using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.data;
using system.data.sqlclient;
/// <summary>
/// summary description for sqlhelper
/// </summary>
public class sqlhelper
{
public sqlhelper()
{
//
// todo: add constructor logic here
//
}
/// <summary>
/// 判断是否登录sql server
/// </summary>
/// <param name="sqlconstring"></param>
/// <returns></returns>
public static bool loginsql(string sqlconstring)
{
bool islogin = false;
using(sqlconnection conn = new sqlconnection(sqlconstring))
{
conn.open();
if (conn.state.tostring().tolower() == "open")
islogin = true;
return islogin;
}
}
}
源代码下载：
作者 cnblogs xu_happy_you
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