前言
应用系统有时候需要打印Datagrid的表格内容，我们本节就来学习打印datagrid内容
打印主要使用：web打印（我们之前有讲过web打印插件jqprint） + 将datagrid重新编制成可以打印的html格式
一、建立一个普通的例子
我们使用官方下载的demo下的datagrid basic.html代码就好
引入Jqgrid打印插件，并增加一个按钮来触发打印事件
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Basic DataGrid - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
<link rel="stylesheet" type="text/css" href="../demo.css">
<script type="text/javascript" src="../../jquery.min.js"></script>
<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
<script src="jquery.jqprint-0.3.js"></script>
</head>
<body>
<h2>Basic DataGrid</h2>
<p>The DataGrid is created from markup, no JavaScript code needed.</p>
<div id="modalwindow" class="easyui-window" style="width:800px; height:400px;" data-options="modal:true,closed:true,minimizable:false,shadow:false"></div>
<div style="margin:20px 0;"><a href="#" id="btnPrint" class="easyui-linkbutton" data-options="iconCls:'icon-print'" style="width:80px">Print</a></div> <table id="List" class="easyui-datagrid" title="Basic DataGrid" style="width:700px;height:250px"
data-options="singleSelect:true,collapsible:true,method:'get'">
<thead>
<tr>
<th data-options="field:'itemid',width:80">Item ID</th>
<th data-options="field:'productid',width:100">Product</th>
<th data-options="field:'listprice',width:80,align:'right'">List Price</th>
<th data-options="field:'unitcost',width:80,align:'right'">Unit Cost</th>
<th data-options="field:'attr1',width:250">Attribute</th>
<th data-options="field:'status',width:60,align:'center'">Status</th>
</tr>
</thead>
</table>
<script type="text/javascript">
$(function () {
//由于本地无法直接读取json文件，所以将数据提取出来赋值
var obj = {
"total": 28, "rows": [
{ "productid": "FI-SW-01", "productname": "Koi", "unitcost": 10.00, "status": "P", "listprice": 36.50, "attr1": "Large", "itemid": "EST-1" },
{ "productid": "K9-DL-01", "productname": "Dalmation", "unitcost": 12.00, "status": "P", "listprice": 18.50, "attr1": "Spotted Adult Female", "itemid": "EST-10" },
{ "productid": "RP-SN-01", "productname": "Rattlesnake", "unitcost": 12.00, "status": "P", "listprice": 38.50, "attr1": "Venomless", "itemid": "EST-11" },
{ "productid": "RP-SN-01", "productname": "Rattlesnake", "unitcost": 12.00, "status": "P", "listprice": 26.50, "attr1": "Rattleless", "itemid": "EST-12" },
{ "productid": "RP-LI-02", "productname": "Iguana", "unitcost": 12.00, "status": "P", "listprice": 35.50, "attr1": "Green Adult", "itemid": "EST-13" },
{ "productid": "FL-DSH-01", "productname": "Manx", "unitcost": 12.00, "status": "P", "listprice": 158.50, "attr1": "Tailless", "itemid": "EST-14" },
{ "productid": "FL-DSH-01", "productname": "Manx", "unitcost": 12.00, "status": "P", "listprice": 83.50, "attr1": "With tail", "itemid": "EST-15" },
{ "productid": "FL-DLH-02", "productname": "Persian", "unitcost": 12.00, "status": "P", "listprice": 23.50, "attr1": "Adult Female", "itemid": "EST-16" },
{ "productid": "FL-DLH-02", "productname": "Persian", "unitcost": 12.00, "status": "P", "listprice": 89.50, "attr1": "Adult Male", "itemid": "EST-17" },
{ "productid": "AV-CB-01", "productname": "Amazon Parrot", "unitcost": 92.00, "status": "P", "listprice": 63.50, "attr1": "Adult Male", "itemid": "EST-18" }
]
}
;
//加载数据
$('#List').datagrid('loadData', obj); }); </script>
</body>
</html>
二、将datagrid数据分解成HTML Table表格
function CreateFormPage(printDatagrid) {
var tableString = '<div class="mvctool bgb"><a onclick="$(\'.dg-pb\').jqprint();" class="btn btn-default"><span class="fa fa-print"></span> 打印</a></div><table cellspacing="0" class="dg-pb">';
var frozenColumns = printDatagrid.datagrid("options").frozenColumns; // 得到frozenColumns对象
var columns = printDatagrid.datagrid("options").columns; // 得到columns对象
var nameList = '';
// 载入title
if (typeof columns != 'undefined' && columns != '') {
$(columns).each(function (index) {
tableString += '\n<tr>';
if (typeof frozenColumns != 'undefined' && typeof frozenColumns[index] != 'undefined') {
for (var i = 0; i < frozenColumns[index].length; ++i) {
if (!frozenColumns[index][i].hidden) {
tableString += '\n<th width="' + frozenColumns[index][i].width + '"';
if (typeof frozenColumns[index][i].rowspan != 'undefined' && frozenColumns[index][i].rowspan > 1) {
tableString += ' rowspan="' + frozenColumns[index][i].rowspan + '"';
}
if (typeof frozenColumns[index][i].colspan != 'undefined' && frozenColumns[index][i].colspan > 1) {
tableString += ' colspan="' + frozenColumns[index][i].colspan + '"';
}
if (typeof frozenColumns[index][i].field != 'undefined' && frozenColumns[index][i].field != '') {
nameList += ',{"f":"' + frozenColumns[index][i].field + '", "a":"' + frozenColumns[index][i].align + '"}';
}
tableString += '>' + frozenColumns[0][i].title + '</th>';
}
}
}
for (var i = 0; i < columns[index].length; ++i) {
if (!columns[index][i].hidden) {
tableString += '\n<th width="' + columns[index][i].width + '"';
if (typeof columns[index][i].rowspan != 'undefined' && columns[index][i].rowspan > 1) {
tableString += ' rowspan="' + columns[index][i].rowspan + '"';
}
if (typeof columns[index][i].colspan != 'undefined' && columns[index][i].colspan > 1) {
tableString += ' colspan="' + columns[index][i].colspan + '"';
}
if (typeof columns[index][i].field != 'undefined' && columns[index][i].field != '') {
nameList += ',{"f":"' + columns[index][i].field + '", "a":"' + columns[index][i].align + '"}';
}
tableString += '>' + columns[index][i].title + '</th>';
}
}
tableString += '\n</tr>';
});
}
// 载入内容
var rows = printDatagrid.datagrid("getRows"); // 这段代码是获取当前页的所有行
var nl = eval('([' + nameList.substring(1) + '])');
for (var i = 0; i < rows.length; ++i) {
tableString += '\n<tr>';
$(nl).each(function (j) {
var e = nl[j].f.lastIndexOf('_0');
tableString += '\n<td';
if (nl[j].a != 'undefined' && nl[j].a != '') {
tableString += ' style="text-align:' + nl[j].a + ';"';
}
tableString += '>';
if (e + 2 == nl[j].f.length) {
if (rows[i][nl[j].f.substring(0, e)] != null) {
tableString += rows[i][nl[j].f.substring(0, e)];
} else {
tableString += "";
}
}
else {
if (rows[i][nl[j].f] != null) {
tableString += rows[i][nl[j].f];
} else {
tableString += "";
}
}
tableString += '</td>';
});
tableString += '\n</tr>';
}
tableString += '\n</table>';
return tableString;
}
代码看起来有点复杂，但是不难看懂，提取datagrid的title和历遍数据得重新写入一个新的table
三、添加打印事件
$("#btnPrint").click(function () {
var tablestr = CreateFormPage($("#List"));
$("#modalwindow").html(tablestr);
$("#modalwindow").window({ title: "打印", width:500, height: 400, iconCls: 'fa fa-plus' }).window('open');
});
四、预览结果
总结：
不是很美观，那么加入一段CSS吧
/*datagrid print*/
.dg-pb{font-size:13px;border-collapse:collapse;}
.dg-pb th{font-weight:bold;text-align:center;border:1px solid #333333;padding:2px;}
.dg-pb td{border:1px solid #333333;padding:2px;}
再次在预览的结果点击打印调出打印机
本节完整代码下载
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Basic DataGrid - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
<link rel="stylesheet" type="text/css" href="../demo.css">
<script type="text/javascript" src="../../jquery.min.js"></script>
<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
<script src="jquery.jqprint-0.3.js"></script>
</head> <body>
<style>
/*datagrid print*/
.dg-pb{font-size:13px;border-collapse:collapse;}
.dg-pb th{font-weight:bold;text-align:center;border:1px solid #333333;padding:2px;}
.dg-pb td{border:1px solid #333333;padding:2px;}
</style>
<h2>Basic DataGrid</h2>
<p>The DataGrid is created from markup, no JavaScript code needed.</p>
<div id="modalwindow" class="easyui-window" style="width:800px; height:400px;" data-options="modal:true,closed:true,minimizable:false,shadow:false"></div>
<div style="margin:20px 0;"><a href="#" id="btnPrint" class="easyui-linkbutton" data-options="iconCls:'icon-print'" style="width:80px">Print</a></div> <table id="List" class="easyui-datagrid" title="Basic DataGrid" style="width:700px;height:250px"
data-options="singleSelect:true,collapsible:true,method:'get'">
<thead>
<tr>
<th data-options="field:'itemid',width:80">Item ID</th>
<th data-options="field:'productid',width:100">Product</th>
<th data-options="field:'listprice',width:80,align:'right'">List Price</th>
<th data-options="field:'unitcost',width:80,align:'right'">Unit Cost</th>
<th data-options="field:'attr1',width:250">Attribute</th>
<th data-options="field:'status',width:60,align:'center'">Status</th>
</tr>
</thead>
</table>
<script type="text/javascript">
$(function () { var obj = {
"total": 28, "rows": [
{ "productid": "FI-SW-01", "productname": "Koi", "unitcost": 10.00, "status": "P", "listprice": 36.50, "attr1": "Large", "itemid": "EST-1" },
{ "productid": "K9-DL-01", "productname": "Dalmation", "unitcost": 12.00, "status": "P", "listprice": 18.50, "attr1": "Spotted Adult Female", "itemid": "EST-10" },
{ "productid": "RP-SN-01", "productname": "Rattlesnake", "unitcost": 12.00, "status": "P", "listprice": 38.50, "attr1": "Venomless", "itemid": "EST-11" },
{ "productid": "RP-SN-01", "productname": "Rattlesnake", "unitcost": 12.00, "status": "P", "listprice": 26.50, "attr1": "Rattleless", "itemid": "EST-12" },
{ "productid": "RP-LI-02", "productname": "Iguana", "unitcost": 12.00, "status": "P", "listprice": 35.50, "attr1": "Green Adult", "itemid": "EST-13" },
{ "productid": "FL-DSH-01", "productname": "Manx", "unitcost": 12.00, "status": "P", "listprice": 158.50, "attr1": "Tailless", "itemid": "EST-14" },
{ "productid": "FL-DSH-01", "productname": "Manx", "unitcost": 12.00, "status": "P", "listprice": 83.50, "attr1": "With tail", "itemid": "EST-15" },
{ "productid": "FL-DLH-02", "productname": "Persian", "unitcost": 12.00, "status": "P", "listprice": 23.50, "attr1": "Adult Female", "itemid": "EST-16" },
{ "productid": "FL-DLH-02", "productname": "Persian", "unitcost": 12.00, "status": "P", "listprice": 89.50, "attr1": "Adult Male", "itemid": "EST-17" },
{ "productid": "AV-CB-01", "productname": "Amazon Parrot", "unitcost": 92.00, "status": "P", "listprice": 63.50, "attr1": "Adult Male", "itemid": "EST-18" }
]
}
;
$('#List').datagrid('loadData', obj); $("#btnPrint").click(function () {
var tablestr = CreateFormPage($("#List"));
$("#modalwindow").html(tablestr);
$("#modalwindow").window({ title: "打印", width:700, height: 400, iconCls: 'fa fa-plus' }).window('open');
});
}); function CreateFormPage(printDatagrid) {
var tableString = '<div class="mvctool bgb"> <a href="#" id="btnPrint" class="easyui-linkbutton" data-options="iconCls:\'icon-print\'" style="width:80px" onclick="$(\'.dg-pb\').jqprint();">打印</a></div><table cellspacing="0" class="dg-pb">';
var frozenColumns = printDatagrid.datagrid("options").frozenColumns; // 得到frozenColumns对象
var columns = printDatagrid.datagrid("options").columns; // 得到columns对象
var nameList = ''; // 载入title
if (typeof columns != 'undefined' && columns != '') {
$(columns).each(function (index) {
tableString += '\n<tr>';
if (typeof frozenColumns != 'undefined' && typeof frozenColumns[index] != 'undefined') {
for (var i = 0; i < frozenColumns[index].length; ++i) {
if (!frozenColumns[index][i].hidden) {
tableString += '\n<th width="' + frozenColumns[index][i].width + '"';
if (typeof frozenColumns[index][i].rowspan != 'undefined' && frozenColumns[index][i].rowspan > 1) {
tableString += ' rowspan="' + frozenColumns[index][i].rowspan + '"';
}
if (typeof frozenColumns[index][i].colspan != 'undefined' && frozenColumns[index][i].colspan > 1) {
tableString += ' colspan="' + frozenColumns[index][i].colspan + '"';
}
if (typeof frozenColumns[index][i].field != 'undefined' && frozenColumns[index][i].field != '') {
nameList += ',{"f":"' + frozenColumns[index][i].field + '", "a":"' + frozenColumns[index][i].align + '"}';
}
tableString += '>' + frozenColumns[0][i].title + '</th>';
}
}
}
for (var i = 0; i < columns[index].length; ++i) {
if (!columns[index][i].hidden) {
tableString += '\n<th width="' + columns[index][i].width + '"';
if (typeof columns[index][i].rowspan != 'undefined' && columns[index][i].rowspan > 1) {
tableString += ' rowspan="' + columns[index][i].rowspan + '"';
}
if (typeof columns[index][i].colspan != 'undefined' && columns[index][i].colspan > 1) {
tableString += ' colspan="' + columns[index][i].colspan + '"';
}
if (typeof columns[index][i].field != 'undefined' && columns[index][i].field != '') {
nameList += ',{"f":"' + columns[index][i].field + '", "a":"' + columns[index][i].align + '"}';
}
tableString += '>' + columns[index][i].title + '</th>';
}
}
tableString += '\n</tr>';
});
}
// 载入内容
var rows = printDatagrid.datagrid("getRows"); // 这段代码是获取当前页的所有行
var nl = eval('([' + nameList.substring(1) + '])');
for (var i = 0; i < rows.length; ++i) {
tableString += '\n<tr>';
$(nl).each(function (j) {
var e = nl[j].f.lastIndexOf('_0'); tableString += '\n<td';
if (nl[j].a != 'undefined' && nl[j].a != '') {
tableString += ' style="text-align:' + nl[j].a + ';"';
}
tableString += '>';
if (e + 2 == nl[j].f.length) { if (rows[i][nl[j].f.substring(0, e)] != null) {
tableString += rows[i][nl[j].f.substring(0, e)];
} else {
tableString += "";
}
}
else {
if (rows[i][nl[j].f] != null) {
tableString += rows[i][nl[j].f];
} else {
tableString += "";
} }
tableString += '</td>';
});
tableString += '\n</tr>';
}
tableString += '\n</table>'; return tableString;
} </script>
</body>
</html>