其实有点标题党了,呵呵,主要是项目的特殊性,出于性能考虑项目经理规定不能用任何服务端控件(包括Repeater控件),同时尽量减少服务端处理,并尽可能压缩最终生成的html源代码,所以只用JS实现。
代码:
<html>
<head>
<title>JavaScript的Repeater控件实现--made by 菩提树下的杨过</title>
<script type="text/javascript">
/*
hashTable的javascript实现
*/
function hashTable() {
this.__hash = {};
//添加key-value键值对
this.add = function(key, value) {
if (typeof (key) != "undefined") {
//if it not contains in hashtable
if (!this.contains(key)) {
this.__hash[key] = typeof (value) == "undefined" ? null : value;
return true;
}
else {
return false;
}
}
};
//删除key-value键值对
this.remove = function(key) {
delete this.__hash[key];
};
this.count = function() {
var i = 0;
for (var obj in this.__hash) {
i++;
}
return i;
};
//取得指定键值
this.items = function(key) {
return this.__hash[key];
};
//检查是否包含指定键
this.contains = function(key) {
return typeof (this.__hash[key]) != "undefined";
};
//清空哈希表
this.clear = function() {
for (var obj in this.__hash) {
delete this.__hash[k];
}
};
}
//替换字符串函数(strReplace中如果有正则表达式的特殊字符串,可能会出错)
function replace(strSource, strReplace, strDestination) {
var reg = new RegExp(strReplace, "g");
return strSource.replace(reg, strDestination);
}
/*测试replace函数
var s = "a1{0}2{0}3";
s = replace(s,"\\{0\\}","***");
alert(s);
*/
</script>
</head>
<body>
<div id="Repleater1">
</div>
<script type="text/javascript">
//模板替换开始
var _sData = "1,2,3|a,b,c|x,y,z"; //实际数据字符串(服务端输出)
var _arrData = _sData.split("|"); //数据数组
var _template = "<div>{1}--{2}--{3}--{2}</div>"; //数据行模板
var _fields = ['1', '2', '3']; //模板中包含的标识数组
var _html = "";
for (var i = 0; i < _arrData.length; i++) {
var _htmlRows = _template; //初始行默认为行模板
var _arrTemp = _arrData[i].split(",");
var _hash = new hashTable();
//将模板标识与实际数据,变成key-value键值对
for (var j = 0; j < _fields.length; j++) {
_hash.add(_fields[j], _arrTemp[j]);
_htmlRows = replace(_htmlRows, "\\{" + _fields[j] + "\\}", _hash.items(_fields[j]))//根据模板标识替换为实际数据
}
_html += _htmlRows;
}
document.getElementById("Repleater1").innerHTML = _html;
</script>
</body>
</html>
欢迎转载 ,但请注明来自菩提树下的杨过 http://www.cnblogs.com/yjmyzz/archive/2009/06/19/1506849.html
Tag标签: javascript,repeater