Javascript版的Repeater控件实现-原创手记-慕课网

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>
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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