极客教程jQWidgets jqxGrid过滤属性
jQWidgets是一个JavaScript框架，用于为PC和移动设备制作基于Web的应用程序。它是一个非常强大的，优化的，与平台无关的，并且被广泛支持的框架。jqxGrid用来说明一个jQuery widget，以表格形式显示数据。此外，它完全支持与数据的连接，以及分页、分组、排序、过滤和编辑。
filter属性是一个回调函数，用于自定义过滤。它被用来覆盖内置的过滤功能。每当网格被过滤时，这个属性就会被调用。它渲染一个布尔类型的值或返回 “未定义”。它是函数类型的，其默认值是 “null”。
语法:
- 设置filter属性。
$('Selector').jqxGrid({ filter: null });
- 返回filter属性。
var filter = $('Selector').jqxGrid('filter');
该函数可容纳的值如下。
- cellValue。它是单元格的现值。
- rowData。它是一个JSON对象，持有当前行的数据。
- dataField。它是过滤器列的数据字段。
- filterGroup。它是所述过滤器的组。
- defaultFilterResult。它是所述的过滤器的默认结果。
链接的文件：从给出的链接中下载jQWidgets。在HTML文件中，找到下载文件夹中的脚本文件。
<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdata.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxbuttons.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxscrollbar.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxmenu.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxgrid.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxgrid.selection.js”></script>
例子1：下面的例子说明了jQWidgets中jqxGrid filter属性。
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="jqwidgets/styles/jqx.base.css"
type="text/css" />
<script type="text/javascript"
src="scripts/jquery-1.11.1.min.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxcore.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxdata.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxbuttons.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxscrollbar.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxmenu.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxgrid.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxgrid.selection.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxgrid.columnsresize.js">
</script>
</head>
<body>
<center>
<h1 style="color: green">
GeeksforGeeks
</h1>
<h3>
jQWidgets jqxGrid filter property
</h3><br />
<div id="jqxg"></div>
<div id="log"></div>
</center>
<script type="text/javascript">
(document).ready(function () {
var d = new Array();
var subjectNames =
["C++", "Scala", "Java", "C", "R", "JavaScript"];
var pageNumber =
["7", "8", "12", "11", "10", "19"];
for (var j = 0; j<50; j++) {
var r = {};
r["subjectnames"] =
subjectNames[Math.floor(Math.random() * subjectNames.length)];
r["pagenumber"] =
pageNumber[Math.floor(Math.random() * pageNumber.length)];
d[j] = r;
}
var src = {
localdata: d,
datatype: "array",
};
var data_Adapter = new.jqx.dataAdapter(src);
("#jqxg").jqxGrid({
source: data_Adapter,
theme: 'energyblue',
filterable: true,
filter: function () {
("#log").text("Filtered!")
},
height: "240px",
width: "270px",
columns: [
{
text: "Subject Name",
columntype: "textbox",
filtertype: "input",
datafield: "subjectnames",
width: "90px",
},
{
text: "Page No.",
datafield: "pagenumber",
filtertype: "checkedlist",
width: "90px",
},
{
text: "Exam",
datafield: "exam",
columntype: "checkbox",
filtertype: "bool",
width: "90px",
},
],
});
});
</script>
</body>
</html>
输出:
例子2：下面是另一个例子，说明了jqxGrid filter 属性在jQWidgets中通过设置其值为 “null”。
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="jqwidgets/styles/jqx.base.css"
type="text/css" />
<script type="text/javascript"
src="scripts/jquery-1.11.1.min.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxcore.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxdata.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxbuttons.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxscrollbar.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxmenu.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxgrid.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxgrid.selection.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxgrid.columnsresize.js">
</script>
</head>
<body>
<center>
<h1 style="color: green">
GeeksforGeeks
</h1>
<h3>
jQWidgets jqxGrid filter property
</h3><br />
<div id="jqxg"></div>
<div>
<input type="button"
id="jqxBtn"
style="margin-top:25px"
value="Click here" />
</div>
<div id="log"></div>
</center>
<script type="text/javascript">
(document).ready(function () {
var d = new Array();
var subjectNames =
["C++", "Scala", "Java", "C", "R", "JavaScript"];
var pageNumber =
["7", "8", "12", "11", "10", "19"];
for (var j = 0; j<50; j++) {
var r = {};
r["subjectnames"] =
subjectNames[Math.floor(Math.random() * subjectNames.length)];
r["pagenumber"] =
pageNumber[Math.floor(Math.random() * pageNumber.length)];
d[j] = r;
}
var src = {
localdata: d,
datatype: "array",
};
var data_Adapter = new.jqx.dataAdapter(src);
("#jqxg").jqxGrid({
source: data_Adapter,
theme: 'energyblue',
filterable: true,
filter: null,
height: "240px",
width: "270px",
columns: [
{
text: "Subject Name",
columntype: "textbox",
filtertype: "input",
datafield: "subjectnames",
width: "90px",
},
{
text: "Page No.",
datafield: "pagenumber",
filtertype: "checkedlist",
width: "90px",
},
{
text: "Exam",
datafield: "exam",
columntype: "checkbox",
filtertype: "bool",
width: "90px",
},
],
});
("#jqxBtn").jqxButton({
width: "180px",
height: "30px",
});
("#jqxBtn").on("click", function () {
var f =('#jqxg').jqxGrid('filter');
$("#log").text(f)
});
});
</script>
</body>
</html>
输出:
