How to generate SQL query form using JavaScript_javascript skills
The example in this article describes the method of generating SQL query form using JavaScript. Share it with everyone for your reference. The details are as follows:
JavaScript is used here to generate a complex SQL query form. You will understand after running it. It can automatically modify your SQL statement according to the selected query conditions. It is a very typical application.
The screenshot of the running effect is as follows:
The specific code is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>查询条件表单</title>
<style>
*{
font-size:12px;
padding:0;
margin:0;
}
body{
padding:40px;
}
#MainBox{
border:#666 1px solid;
background-color:#eee;
width:700px;
}
#MainBox td{
padding:4px;
}
#ConditionBox{
height:150px;
width:100%;
overflow-y:auto;
border:#bbb 1px solid;
padding:2px;
background-color:#fff;
}
.tmFrame{
border:#eee 1px solid;
padding:2px;
width:100%;
}
.tmFrame_highlight{
border:#666 1px solid;
padding:2px;
width:100%;
background-color:#f7f7f7;
}
.fname{
float:left;
width:200px;
}
.conn{
float:left;
width:100px;
}
.fvalue{
float:left;
width:100px;
}
.handlebox{
float:right;
width:180px;
display:none;
}
.handlebox_view{
float:right;
width:180px;
display:block;
}
.rbox{
float:right;
margin:1px;
background-color:#999;
color:#fff;
padding:1px;
width:15px;
cursor:hand;
}
legend{
border:#bbb 1px solid;
padding:4px;
}
fieldset{
border:#bbb 1px solid;
padding:4px;
}
.sqlwords{
margin:2px;
border:#bbb 1px solid;
width:100%;
}
</style>
<script>
////构造函数
function ce(e){return document.createElement(e)}
/* Example:
* var a = cex("DIV", {onmouseover:foo, name:'div1', id:'main'});
*/
function cex(e, x){
var a = ce(e);
for (prop in x){
a[prop] = x[prop];
}
return a;
}
/*
* function ge
* Shorthand function for document.getElementById(i)
*/
function ge(i){return document.getElementById(i)}
/*
* function ac
* Example: ac( house, ac(roof, shingles), ac(floor, ac(tiles, grout)))
*/
function ac(){
if (ac.arguments.length > 1){
var a = ac.arguments[0];
for (i=1; i<ac.arguments.length; i++){
if (arguments[i])
a.appendChild(ac.arguments[i]);
}
return a;
} else {
return null;
}
}
/////ID增量
function guid(){
if (!window.__id) window.__id = 0;
return ++window.__id;
}
//======建立条件类
function term(tname,fname,conn,fvalue,ttype){
this.tname=tname;
this.fname=fname;
this.conn=conn;
this.fvalue=fvalue;
this.id= guid();
this.ttype=ttype;
}
term.prototype.getHTML = function(){
var termFrame = cex("DIV", {
id:this.id,
className:'tmframe',
onmouseover:this.fc_term_onmouseover(),
onmouseout:this.fc_term_onmouseout()
});
//var module = cex("DIV", {
//id:'module'+this.id,
//className:'module'
//});
var tttt=this.tname+"."+this.fname;
if(this.ttype!='fset')
tttt=this.tname;
var mtt = cex("input", {
id:'tp'+this.id,
name:'fname'+this.id,
type:"hidden",
value:this.ttype
});
var fname = cex("DIV", {
id:'fname'+this.id,
className:'fname',
innerHTML:tttt
});
var conn = cex("DIV", {
id:'conn'+this.id,
className:'conn',
innerHTML:this.conn
});
var fvalue = cex("DIV", {
id:'fvalue'+this.id,
className:'fvalue',
innerHTML:this.fvalue
});
var handlebox = cex("div", {
id:'handlebox'+this.id,
className:"handlebox"
});
var mdel = cex("div", {
id:'tmdel'+this.id,
onclick:this.fc_mdel_onclick(),
className:"rbox",
title:"删除此条件",
innerHTML: 'X'
});
var mup = cex("div", {
id:'tmup'+this.id,
onclick:this.fc_mup_onclick(),
className:"rbox",
title:"向上移动",
innerHTML: '↑'
});
var mdown = cex("div", {
id:'tmdown'+this.id,
onclick:this.fc_mdown_onclick(),
className:"rbox",
title:"向下移动",
innerHTML: '↓'
});
var mzkh = cex("div", {
id:'tzkh'+this.id,
onclick:this.fc_mzkh_onclick(),
className:"rbox",
title:"添加左括号",
innerHTML: '('
});
var mykh = cex("div", {
id:'tykh'+this.id,
onclick:this.fc_mykh_onclick(),
className:"rbox",
title:"添加右括号",
innerHTML: ')'
});
var mand = cex("div", {
id:'tand'+this.id,
onclick:this.fc_mand_onclick(),
className:"rbox",
title:"添加并条件",
innerHTML: 'and'
});
var mor = cex("div", {
id:'tor'+this.id,
onclick:this.fc_mor_onclick(),
className:"rbox",
title:"添加或条件",
innerHTML: 'or'
});
// Build DIV
ac (termFrame,
mtt,
ac (handlebox,
mdel,
mup,
mdown,
mykh,
mzkh,
mand,
mor
),
fname,
conn,
fvalue
);
return termFrame;
}
term.prototype.highlight = function(){
ge("handlebox"+this.id).className = 'handlebox_view';
ge(this.id).className = 'tmFrame_highlight';
}
term.prototype.lowlight = function(){
ge("handlebox"+this.id).className = 'handlebox';
ge(this.id).className = 'tmFrame';
}
term.prototype.remove = function(){
var _this = ge(this.id);
_this.parentNode.removeChild(_this);
}
term.prototype.moveup = function(){
var _this = ge(this.id);
var pre_this = _this.previousSibling;
if(pre_this!=null){
_this.parentNode.insertBefore(_this,pre_this);
this.lowlight();
}
}
term.prototype.movedown = function(){
var _this = ge(this.id);
var next_this = _this.nextSibling;
if(next_this!=null){
_this.parentNode.insertBefore(next_this,_this);
this.lowlight();
}
}
term.prototype.addzkh = function(){
var _this = ge(this.id);
var tzkh = new term('╭----------------','','','','zkh');
var node_zkh = tzkh.getHTML();
_this.parentNode.insertBefore(node_zkh,_this);
}
term.prototype.addykh = function(){
var _this = ge(this.id);
var tykh = new term('╰----------------','','','','ykh');
var node_ykh = tykh.getHTML();
if(_this.nextSibling!=null)
_this.parentNode.insertBefore(node_ykh,_this.nextSibling);
else
_this.parentNode.appendChild(node_ykh);
}
term.prototype.addand = function(){
var _this = ge(this.id);
var tand = new term(' 并且','','','','tand');
var node_and = tand.getHTML();
if(_this.nextSibling!=null)
_this.parentNode.insertBefore(node_and,_this.nextSibling);
else
_this.parentNode.appendChild(node_and);
}
term.prototype.addor = function(){
var _this = ge(this.id);
var tor = new term(' 或者','','','','tor');
var node_or = tor.getHTML();
if(_this.nextSibling!=null)
_this.parentNode.insertBefore(node_or,_this.nextSibling);
else
_this.parentNode.appendChild(node_or);
}
///对象控制函数
term.prototype.fc_term_onmouseover = function(){
var _this = this;
return function(){
//if (!_this.isDragging)
_this.highlight();
}
}
term.prototype.fc_term_onmouseout = function(){
var _this = this;
return function(){
//if (!_this.isDragging)
_this.lowlight();
}
}
term.prototype.fc_mdel_onclick = function(){
var _this = this;
return function(){
_this.remove();
}
}
term.prototype.fc_mup_onclick = function(){
var _this = this;
return function(){
_this.moveup();
}
}
term.prototype.fc_mdown_onclick = function(){
var _this = this;
return function(){
_this.movedown();
}
}
term.prototype.fc_mzkh_onclick = function(){
var _this = this;
return function(){
_this.addzkh();
}
}
term.prototype.fc_mykh_onclick = function(){
var _this = this;
return function(){
_this.addykh();
}
}
term.prototype.fc_mand_onclick = function(){
var _this = this;
return function(){
_this.addand();
}
}
term.prototype.fc_mor_onclick = function(){
var _this = this;
return function(){
_this.addor();
}
}
/////插入页面
function insertterm(){
var tname = document.all.tname.value;
var fname = document.all.fname.value;
var conn = document.all.conn.value;
var fvalue = document.all.fvalue.value;
//xl(tname+"|"+fname+"|"+conn+"|"+fvalue);
var tm = new term(tname,fname,conn,fvalue,"fset");
var tmHTML = tm.getHTML();
ac(ge("ConditionBox"),tmHTML);
//ZA.addterm(tm);
addtofrom(tname);
}
var tt = new Array();
function addtofrom(tname){
var ttexit="no";
for(var i=0;i<tt.length;i++){
if(tt[i]==tname)
ttexit="yes";
}
if(ttexit=="no"){
tt[i]=tname;
//alert(tt[i]);
}
}
//====条件控制窗口函数
function CBadd(){
var h = document.all.ConditionBox.offsetHeight;
document.all.ConditionBox.style.height = h + 20 + "px";
}
function CBcut(){
var h = document.all.ConditionBox.offsetHeight;
if(h>=150)
document.all.ConditionBox.style.height = h - 20 + "px";
else
return false;
}
function getSQL(){
var sql="";
var ma = ge("ConditionBox").childNodes;
for(i=0;i<ma.length;i++){
var id = ma[i].getAttribute("id");
var tp = ge("tp"+id).value;
if(tp=="fset"){
//sql+=" "+ge("fname"+id).innerHTML;
//sql+=" "+ge("conn"+id).innerHTML;
//sql+=" \""+ge("fvalue"+id).innerHTML+"\"";
var fname=ge("fname"+id).innerHTML;
var conn=ge("conn"+id).innerHTML;
var fvalue=ge("fvalue"+id).innerHTML;
sql+=" "+fname;
if(conn=="等于")
sql+=" = "+"\'"+fvalue+"\'";
if(conn=="大于")
sql+=" > "+"\'"+fvalue+"\'";
if(conn=="小于")
sql+=" < "+"\'"+fvalue+"\'";
if(conn=="不等于")
sql+=" <> "+"\'"+fvalue+"\'";
if(conn=="为空")
sql+=" is null ";
if(conn=="不为空")
sql+=" is not null ";
if(conn=="包含")
sql+=" like \'%"+fvalue+"%\'";
}
else{
//sql+=" "+ge("fname"+id).innerHTML;
if(tp=="zkh")
sql+=" (";
if(tp=="ykh")
sql+=" )";
if(tp=="tand")
sql+=" and";
if(tp=="tor")
sql+=" or";
}
//var mn = ma.childNodes;
}
var ffrom = "FROM "+getFrom();
ge("sqlwords").value ="Select * "+ ffrom+" Where "+sql;
}
function getFrom(){
var ff=tt.toString();
return ff;
}
</script>
</head>
<body>
<table border="0" cellspacing="0" cellpadding="0" id="MainBox">
<tr>
<td colspan="2" style="background-color:#999;color:#000;font-weight:bolder;font-size:14px">复杂查询表单</td>
</tr>
<tr>
<td><div id="ConditionBox"></div>
<div style="width:100%"><SPAN title='放大显示框' style='float:right;FONT-SIZE: 14px; CURSOR: hand;FONT-FAMILY: webdings' onclick='CBadd()'>6</SPAN><SPAN title='缩小显示' style='float:right;FONT-SIZE: 14px; CURSOR: hand;FONT-FAMILY: webdings' onclick='CBcut()'>5</SPAN></div></td>
</tr>
<tr>
<td>
<fieldset>
<legend>SQL表达式</legend>
<input type="text" id="sqlwords" class="sqlwords" /><input type="submit" name="Submit" value="GET SQL" onclick="getSQL()" style="float:right"/>
</fieldset>
</td>
</tr>
<tr>
<td>
<fieldset>
<legend>定义条件</legend>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>表</td>
<td><select name="tname" id="tname">
<option value="table1" selected="selected">表1</option>
<option value="table2">表2</option>
<option value="table3">表3</option>
<option value="table4">表4</option>
<option value="table5">表5</option>
</select></td>
<td>字段</td>
<td><select name="fname" id="fname">
<option value="f1">字段1</option>
<option value="f2">字段2</option>
<option value="f3">字段3</option>
<option value="f4">字段4</option>
<option value="f5">字段5</option>
<option value="f6">字段6</option>
<option value="f7">字段7</option>
</select></td>
<td>关系</td>
<td><select name="conn" id="conn">
<option value="大于">大于</option>
<option value="等于">等于</option>
<option value="小于">小于</option>
<option value="不等于">不等于</option>
<option value="为空">为空</option>
<option value="不为空">不为空</option>
<option value="包含">包含</option>
</select></td>
<td>值</td>
<td><input name="fvalue" type="text" id="fvalue" value="111111" /></td>
<td><input type="submit" name="Submit" value="增加新条件" onclick="insertterm()"/></td>
</tr>
</table>
</fieldset>
</td>
</tr>
</table>
</body>
</html>I hope this article will be helpful to everyone’s JavaScript programming design.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to implement an online speech recognition system using WebSocket and JavaScript
Dec 17, 2023 pm 02:54 PM
How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.
WebSocket and JavaScript: key technologies for implementing real-time monitoring systems
Dec 17, 2023 pm 05:30 PM
WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology
How to use JavaScript and WebSocket to implement a real-time online ordering system
Dec 17, 2023 pm 12:09 PM
Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order
How to implement an online reservation system using WebSocket and JavaScript
Dec 17, 2023 am 09:39 AM
How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.
JavaScript and WebSocket: Building an efficient real-time weather forecasting system
Dec 17, 2023 pm 05:13 PM
JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We
Simple JavaScript Tutorial: How to Get HTTP Status Code
Jan 05, 2024 pm 06:08 PM
JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest
How to use insertBefore in javascript
Nov 24, 2023 am 11:56 AM
Usage: In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted).
What to do if the word directory is generated incorrectly
Feb 20, 2024 am 08:08 AM
What to do if word table of contents is generated incorrectly. With the development of technology, electronic documents have become an indispensable part of our daily work and study. When editing electronic documents, especially long articles or papers, the generation of a table of contents is a very important step. The table of contents can make it easier for readers to find the content and structure of the article and improve reading efficiency. However, sometimes we encounter some problems in the process of generating the catalog, such as catalog generation errors, disordered order, etc. So, if the word directory is generated incorrectly, how should we solve it? head
