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Back Forward Refresh Home 2020年8月5日 星期三 RSS CLI Mine Sweeper. In Javascript.

  用Javascript对表格排序
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很多服务器端的Grid控件都支持了排序。当用户单击表头的时候以这个列来排序。但是每次的排序几乎都是发回给服务器在服务器端进行排序。有的是用 Session或ViewState缓存的DataSource用DefautView排序。有的是重新拼SQL的OrderBy排序。这种做法都需要 PostBack,刷新页面,就算用了Ajax,总归需要占用服务器资源。使用Javascript的Array.sort Array.reverse 和DocumentFragment。可以实现Javascript客户端的排序,省去了发回服务器排序的操作。但是如果是很实时的系统可能需要发回到服务器,排序同时刷新数据。
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>TableSort</title>
<script type="text/javascript" language="javascript">
function sortTable(tableID, sortColumn, nodeType)
{
//get table.
var table = document.getElementById(tableID);

//get tbody.
var tableBody = table.tBodies[0];

//table rows.
var tableRows = tableBody.rows;

var rowArray = new Array();

//initial row array.
for (var i=0; i<tableRows.length; i++)
{
rowArray[i] = tableRows[i];
}

if(table.sortColumn == sortColumn)
{
rowArray.reverse();
}
else
{
rowArray.sort(generateCompareTR(sortColumn, nodeType));
}

var tbodyFragment = document.createDocumentFragment();
for(var i=0; i< rowArray.length; i++)
{
tbodyFragment.appendChild(rowArray[i]);
}

tableBody.appendChild(tbodyFragment);
table.sortColumn = sortColumn;
}

function generateCompareTR(sortColumn, nodeType)
{
return function compareTR(trLeft, trRight){
var leftValue = convert(trLeft.cells[sortColumn].firstChild.nodeValue, nodeType);
var rightValue = convert(trRight.cells[sortColumn].firstChild.nodeValue, nodeType);
if(leftValue<rightValue)
{
return -1;
}
else if(leftValue>rightValue)
{
return 1;
}
else
{
return 0
}
}
}

function convert(value, dataType)
{
switch(dataType)
{
case "int":
return parseInt(value);
case "float":
return parseFloat(value);
case "date":
return new Date(Date.parse(value));
default:
return value.toString();
}
}
</script>
</head>
<body>
<table border="1px" id="tbSort">
<thead>
<tr>
<th><a href=javascript:sortTable("tbSort",0)>Last Name</a></th>
<th><a href=javascript:sortTable("tbSort",1,"int")>Age</a></th>
</tr>
</thead>
<tbody>
<tr>
<td>Zesson</td><td>23</td>
</tr>
<tr>
<td>Smith</td><td>24</td>
</tr>
<tr>
<td>Henderson</td><td>25</td>
</tr>
<tr>
<td>Williams</td><td>26</td>
</tr>
<tr>
<td>Gilliam</td><td>27</td>
</tr>
<tr>
<td>Walker</td><td>3</td>
</tr>
<tr>
<td>Alex</td><td>20</td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan="2">Sum Column.Do not want to sort.</td>
</tr>
</tfoot>
</table>
</body>
</html>

  Posted @ 7/3/2007 12:53:56 PM | Hits (40659) | Comments (1

  Comment
 #re:用Javascript对表格排序  7/9/2007 4:13:21 PM  billllll
嗯,体验问题上,JS真是不错
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