使用 Dojo 显示表格数据，并带筛选(filter)功能

如何使用 Dojo 显示表格数据，并应用筛选(filter) 功能？

步骤如下：

1. 将数数组塞进符合ItemFileWriteStore 定义的变量 data 中，

2. 根据 data 变量创建一个ItemFileWriteStore 类型的 data store，

3. 将 data store 绑定到 grid 对象中，

4. 在 grid 中定义点击事件，当点击时触发 grid 的筛选功能。

具体可运行代码：

<!DOCTYPE html>
<html >
<head>

	<link rel="stylesheet" href="./dojo/dijit/themes/claro/claro.css">
	<style type="text/css">
@import "./dojo/dojo/resources/dojo.css";
@import "./dojo/dijit/themes/claro/claro.css";
@import "./dojo/dojox/grid/enhanced/resources/claro/EnhancedGrid.css";
@import "./dojo/dojox/grid/enhanced/resources/EnhancedGrid_rtl.css";

/*Grid need a explicit width/height by default*/
#grid {
    width: 45em;
    height: 20em;
}
	</style>
	<script>dojoConfig = {parseOnLoad: true}</script>
	<script src='./dojo/dojo/dojo.js'></script>
	
	<script>
dojo.require("dojox.grid.EnhancedGrid");
dojo.require("dojo.data.ItemFileWriteStore");

dojo.ready(function(){
    /*set up data store*/
    var data = {
      identifier: 'id',items: []
    };
    var data_list = [
      { col1: "normal",col2: false,col3: 'But are ',id:1},{ col1: "important",col3: 'Because a',id:2},col3: 'Signs can ',id:3}
    ];

    for(var i=0; i<data_list.length; i++){
      data.items.push(data_list[i]);
    }
    var store = new dojo.data.ItemFileWriteStore({data: data});

    /*set up layout*/
    var layout = [[
      {'name': 'Column 1','field': 'id'},{'name': 'Column 2','field': 'col2'},{'name': 'Column 3','field': 'col3','width': '230px'},]];

    /*create a new grid:*/
    var grid = new dojox.grid.EnhancedGrid({
        id: 'grid',store: store,structure: layout,rowSelector: '20px'},document.createElement('div'));

    /*append the new grid to the div*/
    dojo.byId("gridDiv").appendChild(grid.domNode);

    require(['dojo/_base/lang','dojo/on','dojo/parser','dojox/grid/DataGrid','dojo/data/ItemFileWriteStore','dojo/dom','dojo/domReady!'],function(lang,on,parser,DataGrid,ItemFileWriteStore,dom){

        var button1 = dojo.byId("button1");
        on(button1,'click',function(e){
          /* Filter the movies from the data store: */
          grid.filter({col3: "*re*"});
        });

        var button2 = dojo.byId("button2");

      /* attach an event handler */
      on(button2,function(e){
        /* reset the filter: */
        grid.filter({col3: '*'});
      }
      );

    });

    /*Call startup() to render the grid*/
    grid.startup();
});
	</script>
</head>
<body class="claro">
    <div id="gridDiv"></div>

    <span id='button1'>Filter</span>
    <span id='button2'>All</span>

</body>
</html>

更新1 ：

上面例子中传入 filter 的 key 和 grid.store 的 key，以及和 grid.structure 同名。

经测试发现，实际上， filter 中传入的应该是grid.store 中的 key ，而并不是 grid.structure 中的 field。

修改了 grid.store 的 key 和 grid.structure 的 field 的可运行代码：

<!DOCTYPE html>
<html >
<head>

	<link rel="stylesheet" href="./dojo/dijit/themes/claro/claro.css">
	<style type="text/css">
@import "./dojo/dojo/resources/dojo.css";
@import "./dojo/dijit/themes/claro/claro.css";
@import "./dojo/dojox/grid/enhanced/resources/claro/EnhancedGrid.css";
@import "./dojo/dojox/grid/enhanced/resources/EnhancedGrid_rtl.css";

/*Grid need a explicit width/height by default*/
#grid {
    width: 45em;
    height: 20em;
}
	</style>
	<script>dojoConfig = {parseOnLoad: true}</script>
	<script src='./dojo/dojo/dojo.js'></script>
	
	<script>
dojo.require("dojox.grid.EnhancedGrid");
dojo.require("dojo.data.ItemFileWriteStore");

dojo.ready(function(){
    /*set up data store*/
    var data = {
      identifier: 'id',ccc: "asdafsd",col3: 'fff',ccc: "aaaa",col3: 'asfb',ccc: "bbb",'field': 'cccfffff'},'field': 'col3'},document.createElement('div'));

    /*append the new grid to the div*/
    dojo.byId("gridDiv").appendChild(grid.domNode);

    var colName = "ccc";

    console.log(colName);
    console.log("ccc");

    require(['dojo/_base/lang',function(e){
          /* Filter the movies from the data store: */
          grid.filter({"ccc": "*f*"});
        });

        var button2 = dojo.byId("button2");

      /* attach an event handler */
      on(button2,function(e){
        /* reset the filter: */
        grid.filter({"ccc": '*'});
      }
      );

    });

    console.log(grid);

    /*Call startup() to render the grid*/
    grid.startup();
});
	</script>
</head>
<body class="claro">
    <div id="gridDiv"></div>

    <span id='button1'>Filter</span>
    <span id='button2'>All</span>

</body>
</html>

修改后效果如下：

ccc 的数据没有显示出现，但是 filter 效果以及存在。可见 grid.filter() 实际上是根据 grid.store 里面的 key 来进行筛选的，无论这个 key 是否显示。而决定这个 key 是否显示则有 grid.structure 部分决定。

筛选前 :

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筛选后：

使用 Dojo 显示表格数据，并带筛选(filter)功能

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