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javaScript自定义绑定

时间:2009-10-11 08:12来源:未知 作者:大宝库 点击:读取中
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以下内容是代码,请复制下载使用

<script type = "text/javascript">
        function pageLoad()
        {
            var text = new Sys.UI.TextBox($('text'));
            var label = new Sys.UI.Label($('label'));
            text.set_text("Hello,world!");
           
           
            var binding_1 = new Sys.Binding();
            binding_1.set_dataContext(text);
            binding_1.set_dataPath('text');
            binding_1.set_property('text');
            binding_1.transform.add(customTransform);
           
           
            label.get_bindings().add(binding_1);
            text.initialize();
            label.initialize();
        }
        function customTransform(sender,eventArgs)
        {
            var value = eventArgs.get_value();
            var reverseStr = new Sys.StringBuilder();
            for(var i = value.length - 1;i >= 0;i--)
            {
               
                reverseStr.append(value.charAt(i));
                eventArgs.set_value(reverseStr.toString());
            }
        }
    </script>
</head>
<body onload = "pageLoad();">
    <form id="form1" runat="server">
        <atlas:scriptmanager ID = "scriptmanager" runat="server"></atlas:scriptmanager>
        <div>
            <h3><u>Example 3:</u></h3>
            <div id = "font">
                This example binds the label(a span element) to the text box and <br />
                demonstrates a custom transform to reverse the text from th entered<br />
                value.<br />
                Enter a string:<input type = "text" id = "text" runat = "server" /><br />
                Reversed Text:<label id = "label" runat = "server"></label>
            </div>
          
        </div>
           
    </form>


(责任编辑:大宝库)


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