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 οnclick="$(\'.dg-pb\').jqprint();" class="btn btn-default"><span class="fa fa-print"></span> 打印</a></div><table cellspacing="0" class="dg-pb">';var frozenColumns = printDatagrid.datagrid("options").frozenColumns; // 得到frozenColumns对象 var columns = printDatagrid.datagrid("options").columns; // 得到columns对象 var nameList = '';// 载入title if (typeof columns != 'undefined' && columns != '') {$(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" οnclick="$(\'.dg-pb\').jqprint();">打印</a></div><table cellspacing="0" class="dg-pb">';var frozenColumns = printDatagrid.datagrid("options").frozenColumns; // 得到frozenColumns对象var columns = printDatagrid.datagrid("options").columns; // 得到columns对象var nameList = '';// 载入titleif (typeof columns != 'undefined' && columns != '') {$(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>
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