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、优化、独立于平台且得到广泛支持的框架。这jqxTreeGrid用于表示tree-like结构中的数据。该小部件对于显示多列分层数据、数据分页、排序和过滤、数据编辑、列大小调整、固定列、条件格式、聚合和行选择非常有用。这些小部件还可以读取和显示来自任何类型数据源(例如 XML、JSON、Array、CSV 或 TSV)的数据。
虚拟模式创建记录property是一个回调函数，有助于强制将数据加载到显示的jqxTreeGrid中。其中，对于每条记录，jqxTreeGrid 都会调用虚拟模式创建记录只需在需要时即可运行，这允许人们根据请求呈现数据。此外，为了启用按需加载函数，还必须指定虚拟模式记录创建函数。它是Function类型，默认值为null。
参数：
- 行键/ID：它是指定的行 id/key，它是该行的唯一 id/key。
- Done:每当数据填充时就会调用指定的回调函数。
用法:
设置虚拟模式创建记录属性：
$('Selector').jqxTreeGrid({ virtualModeCreateRecords: null });
返回虚拟模式创建记录属性：
var virtualModeCreateRecords =
$('Selector').jqxTreeGrid('virtualModeCreateRecords');
链接文件：下载jQWidgets从给定的链接。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.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/jqxlistbox.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdropdownlist.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdatatable.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxtreegrid.js”></script>
示例 1：下面的例子说明了jqxTreeGrid虚拟模式创建记录jQWidgets 中的属性。
HTML
<!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/jqxlistbox.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxdropdownlist.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxdatatable.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxtreegrid.js">
</script>
</head>
<body>
<center>
<h1 style="color:green;">
GeeksforGeeks
</h1>
<h3> jQWidgets jqxTreeGrid virtualModeCreateRecords
Property
</h3>
<div id="jqxTreeGrid" style="margin: 25px;">
</div>
<input type="button" style="margin: 29px;"
id="jqxbtn" value="Click here" />
<div id="log"></div>
<script type="text/javascript">
$(document).ready(function () {
var A = [{
"ID": 1,
"Employee_Name": "Amit",
"Company": "GeeksforGeeks",
"Designation": "Content Writer",
"expanded": true,
A1: [{
"ID": 2,
"Employee_Name": "Sumit",
"Company": "Amazon",
"Designation": "Software Engineer",
}, {
"ID": 3,
"Employee_Name": "Vivek",
"Company": "Apple",
"Designation": "Product Manager",
"expanded": true,
A1: [{
"ID": 4,
"Employee_Name": "Soni",
"Company": "Flipkart",
"Designation": "HR",
}]
}]
}];
var Data_Source = {
dataFields: [{
name: 'ID'
}, {
name: 'Employee_Name'
}, {
name: 'Company'
}, {
name: 'Designation'
}, {
name: 'A1',
type: 'array'
}, {
name: 'expanded'
}],
hierarchy: {
root: 'A1'
},
id: 'ID',
localData: A
};
var Data = new $.jqx.dataAdapter(Data_Source);
$("#jqxTreeGrid").jqxTreeGrid({
source: Data,
virtualModeCreateRecords: true,
columns: [{
text: 'Employee_Name',
align: 'center',
dataField: 'Employee_Name',
width: 140
}, {
text: 'Company',
align: 'center',
dataField: 'Company',
width: 150
}, {
text: 'Designation',
align: 'center',
dataField: 'Designation',
width: 150
}]
});
$("#jqxbtn").jqxButton({
width: 270
});
$("#jqxbtn").on("click", function () {
var vmcr =
$('#jqxTreeGrid').jqxTreeGrid(
'virtualModeCreateRecords');
$('#log').text(vmcr);
});
});
</script>
</center>
</body>
</html>输出：
示例 2：下面是jqxTreeGrid的另一个例子虚拟模式创建记录jQWidgets 中的属性。
HTML
<!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/jqxlistbox.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxdropdownlist.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxdatatable.js">
</script>
<script type="text/javascript"
src="jqwidgets/jqxtreegrid.js">
</script>
</head>
<body>
<center>
<h1 style="color:green;">
GeeksforGeeks
</h1>
<h3> jQWidgets jqxTreeGrid virtualModeCreateRecords
Property
</h3>
<div id="jqxTreeGrid" style="margin: 25px;">
</div>
<input type="button" style="margin: 29px;"
id="jqxbtn" value="Click here" />
<div id="log"></div>
<script type="text/javascript">
$(document).ready(function () {
var A = [{
"ID": 1,
"Employee_Name": "Amit",
"Company": "GeeksforGeeks",
"Designation": "Content Writer",
"expanded": true,
A1: [{
"ID": 2,
"Employee_Name": "Sumit",
"Company": "Amazon",
"Designation": "Software Engineer",
}, {
"ID": 3,
"Employee_Name": "Vivek",
"Company": "Apple",
"Designation": "Product Manager",
"expanded": true,
A1: [{
"ID": 4,
"Employee_Name": "Soni",
"Company": "Flipkart",
"Designation": "HR",
}]
}]
}];
var Data_Source = {
dataFields: [{
name: 'ID'
}, {
name: 'Employee_Name'
}, {
name: 'Company'
}, {
name: 'Designation'
}, {
name: 'A1',
type: 'array'
}, {
name: 'expanded'
}],
hierarchy: {
root: 'A1'
},
id: 'ID',
localData: A
};
var Data = new $.jqx.dataAdapter(Data_Source);
$("#jqxTreeGrid").jqxTreeGrid({
source: Data,
virtualModeCreateRecords: null,
columns: [{
text: 'Employee_Name',
align: 'center',
dataField: 'Employee_Name',
width: 140
}, {
text: 'Company',
align: 'center',
dataField: 'Company',
width: 150
}, {
text: 'Designation',
align: 'center',
dataField: 'Designation',
width: 150
}]
});
$("#jqxbtn").jqxButton({
width: 270
});
$("#jqxbtn").on("click", function () {
var vmcr =
$('#jqxTreeGrid').jqxTreeGrid(
'virtualModeCreateRecords');
if (vmcr === null) {
$('#log').text("Null!");
}
else {
$('#log').text("Not null!");
}
});
});
</script>
</center>
</body>
</html>输出：
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注：本文由纯净天空筛选整理自nidhi1352singh大神的英文原创作品 jQWidgets jqxTreeGrid virtualModeCreateRecords Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。