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สร้าง Create Dynamic Elements แบบ เพิ่ม-ลบ ได้ให้กับ Form ด้วย JavaScript แบบง่าย ๆ |
Create Dynamic Elements บทความนี้จะเป็นการสร้าง Dynamic Elements ที่สามารถ เพิ่ม-ลบ จำนวน Item ในรายการของ Form โดยใช้ JavaScript เข้ามาจัดการเช่น การเพิ่ม Textbox หรือเพิ่ม แถวของ Table Rows รวมทั้งตัวอย่างการเพิ่ม Option ของ Listmenu ที่ดึงข้อมูลมาจากฐานข้อมูล MySQL
เริ่มด้วยการสร้างตารางชื่อ customer
CREATE TABLE `customer` (
`CustomerID` varchar(4) NOT NULL,
`Name` varchar(50) NOT NULL,
`Email` varchar(50) NOT NULL,
`CountryCode` varchar(2) NOT NULL,
`Budget` double NOT NULL,
`Used` double NOT NULL,
PRIMARY KEY (`CustomerID`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
--
-- Dumping data for table `customer`
--
INSERT INTO `customer` VALUES ('C001', 'Win Weerachai', '[email protected]', 'TH', 1000000, 600000);
INSERT INTO `customer` VALUES ('C002', 'John Smith', '[email protected]', 'EN', 2000000, 800000);
INSERT INTO `customer` VALUES ('C003', 'Jame Born', '[email protected]', 'US', 3000000, 600000);
INSERT INTO `customer` VALUES ('C004', 'Chalee Angel', '[email protected]', 'US', 4000000, 100000);
ตัวอย่างที่ 1 การสร้าง ปุ่ม บวก-ลบ เพื่อเพิ่มแถว
Code (JavaScript)
<html>
<head>
<title>ThaiCreate.Com JavaScript Add/Remove Element</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<?php
mysql_connect("localhost","root","root");
mysql_select_db("mydatabase");
$strSQL = "SELECT * FROM customer";
$objQuery = mysql_query($strSQL);
?>
<script language="javascript">
function CreateSelectOption(ele)
{
var objSelect = document.getElementById(ele);
var Item = new Option("", "");
objSelect.options[objSelect.length] = Item;
<?php
while($objResult = mysql_fetch_array($objQuery))
{
?>
var Item = new Option("<?php echo $objResult["Name"];?>", "<?php echo $objResult["CustomerID"];?>");
objSelect.options[objSelect.length] = Item;
<?php
}
?>
}
function CreateNewRow()
{
var intLine = parseInt(document.frmMain.hdnMaxLine.value);
intLine++;
var theTable = document.getElementById("tbExp");
var newRow = theTable.insertRow(theTable.rows.length)
newRow.id = newRow.uniqueID
var newCell
//*** Column 1 ***//
newCell = newRow.insertCell(0);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column1_"+intLine+"\" ID=\"Column1_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 2 ***//
newCell = newRow.insertCell(1);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column2_"+intLine+"\" ID=\"Column2_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 3 ***//
newCell = newRow.insertCell(2);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column3_"+intLine+"\" ID=\"Column3_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 4 ***//
newCell = newRow.insertCell(3);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column4_"+intLine+"\" ID=\"Column4_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 5 ***//
newCell = newRow.insertCell(4);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><SELECT NAME=\"Column5_"+intLine+"\" ID=\"Column5_"+intLine+"\"></SELECT></center>";
//*** Create Option ***//
CreateSelectOption("Column5_"+intLine)
document.frmMain.hdnMaxLine.value = intLine;
}
function RemoveRow()
{
intLine = parseInt(document.frmMain.hdnMaxLine.value);
if(parseInt(intLine) > 0)
{
theTable = document.getElementById("tbExp");
theTableBody = theTable.tBodies[0];
theTableBody.deleteRow(intLine);
intLine--;
document.frmMain.hdnMaxLine.value = intLine;
}
}
</script>
<body>
<form name="frmMain" method="post">
<table width="445" border="1" id="tbExp">
<tr>
<td><div align="center">Column 1 </div></td>
<td><div align="center">Column 2 </div></td>
<td><div align="center">Column 3 </div></td>
<td><div align="center">Column 4 </div></td>
<td><div align="center">Column 5 </div></td>
</tr>
</table>
<input type="hidden" name="hdnMaxLine" value="0">
<input name="btnAdd" type="button" id="btnAdd" value="+" onClick="CreateNewRow();">
<input name="btnDel" type="button" id="btnDel" value="-" onClick="RemoveRow();">
</form>
</body>
</html>
Screenshot
ตัวอย่างที่ 2 แบบใส่จำนวนตัวเลขได้
Code (PHP)
<html>
<head>
<title>ThaiCreate.Com JavaScript Add/Remove Element</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<?php
mysql_connect("localhost","root","root");
mysql_select_db("mydatabase");
$strSQL = "SELECT * FROM customer";
$objQuery = mysql_query($strSQL);
?>
<script language="javascript">
function CreateSelectOption(ele)
{
var objSelect = document.getElementById(ele);
var Item = new Option("", "");
objSelect.options[objSelect.length] = Item;
<?php
while($objResult = mysql_fetch_array($objQuery))
{
?>
var Item = new Option("<?php echo $objResult["Name"];?>", "<?php echo $objResult["CustomerID"];?>");
objSelect.options[objSelect.length] = Item;
<?php
}
?>
}
function CreateNewRow()
{
var intLine = parseInt(document.frmMain.hdnMaxLine.value);
intLine++;
var theTable = document.all.tbExp
var newRow = theTable.insertRow(theTable.rows.length)
newRow.id = newRow.uniqueID
var newCell
//*** Column 1 ***//
newCell = newRow.insertCell(0);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column1_"+intLine+"\" ID=\"Column1_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 2 ***//
newCell = newRow.insertCell(1);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column2_"+intLine+"\" ID=\"Column2_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 3 ***//
newCell = newRow.insertCell(2);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column3_"+intLine+"\" ID=\"Column3_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 4 ***//
newCell = newRow.insertCell(3);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><INPUT TYPE=\"TEXT\" SIZE=\"5\" NAME=\"Column4_"+intLine+"\" ID=\"Column4_"+intLine+"\" VALUE=\"\"></center>";
//*** Column 5 ***//
newCell = newRow.insertCell(4);
newCell.id = newCell.uniqueID;
newCell.setAttribute("className", "css-name");
newCell.innerHTML = "<center><SELECT NAME=\"Column5_"+intLine+"\" ID=\"Column5_"+intLine+"\"></SELECT></center>";
//*** Create Option ***//
CreateSelectOption("Column5_"+intLine)
document.frmMain.hdnMaxLine.value = intLine;
}
function RemoveRow()
{
intLine = parseInt(document.frmMain.hdnMaxLine.value);
if(parseInt(intLine) > 0)
{
theTable = document.getElementById("tbExp");
theTableBody = theTable.tBodies[0];
theTableBody.deleteRow(intLine);
intLine--;
document.frmMain.hdnMaxLine.value = intLine;
}
}
function GenerateRow()
{
var intRows = parseInt(document.frmMain.txtCount.value);
for(i=0;i<intRows;i++)
{
CreateNewRow();
}
}
</script>
<body>
<form name="frmMain" method="post">
<table width="445" border="1" id="tbExp">
<tr>
<td><div align="center">Column 1 </div></td>
<td><div align="center">Column 2 </div></td>
<td><div align="center">Column 3 </div></td>
<td><div align="center">Column 4 </div></td>
<td><div align="center">Column 5 </div></td>
</tr>
</table>
<input type="hidden" name="hdnMaxLine" value="0">
<input type="text" name="txtCount" value="1" size="5"><input name="btnCreate" type="button" id="btnCreate" value="+" onClick="GenerateRow();">
<input name="btnDel" type="button" id="btnDel" value="-" onClick="RemoveRow();">
</form>
</body>
</html>
Screenshot
กระทู้บทความที่เกี่ยวข้อง
Go to : การใช้ JavaScript CreateElement and Validate ตรวจสอบค่า Rows , Column ตรวจสอบค่าว่าง
Go to : Ajax CreateElement
Go to : PHP MySQL Upload File to MySQL - Multiple Dynamic CreateElement Input File Upload
Go to : createElement('select'); สร้าง Element ของ Select Option พร้อมกับ ดึงข้อมูลจาก MySQL Database ครับ
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TC Admin
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Article : |
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Create Date : |
2010-12-06 |
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