excel 中的透视表对于数据分析来说，非常的方便，而且很多业务人员对于excel的操作也是非常熟悉的，因此用excel作为分析数据的界面，不失为一种很好的选择。那么如何用c#从数据库中抓取数据，并在excel 动态生成pivottable呢？下面结合实例来说明。
一般来说，数据库的设计都遵循规范化的原则，从而减少数据的冗余，但是对于数据分析来说，数据冗余能够提高数据加载的速度，因此为了演示透视表，这里现在数据库中建立一个视图，将需要分析的数据整合到一个视图中。如下图所示：
数据源准备好后，我们先来建立一个web应用程序，然后用nuget加载epplus程序包，如下图所示：
在index.aspx前台页面中，编写如下脚本：
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<%@ page language="c#" autoeventwireup="true" codebehind="index.aspx.cs" inherits="excelpivot.web.index" %><!doctype html><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"><meta http-equiv="content-type" content="text/html; charset=utf-8"/> <title>excel pivottable</title> <link rel="stylesheet" type="text/css" href="css/style.css" /> </head><body> <form id="form1" runat="server"> <div id="container"> <div id="contents"> <div id="post"> <header> <h1> excel pivottable </h1> </header> <div id="metro-array" style="display: inline-block;"> <div style="width: 230px; height: 230px; float: left; "> <a class="metro-tile" style="cursor: pointer; width: 230px; height: 110px; display: block; background-color:#ff0000; color: #fff; margin-bottom: 10px;"> <input type="button" runat="server" id="button1" name="btn1" value="回款情况分析" onserverclick="btn1_serverclick" style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:110px; cursor:pointer;"/> </a> <a class="metro-tile" style="cursor: pointer; width: 230px; height: 110px; display: block; background-color:#ff6a00; color: #fff;"> <input type="button" runat="server" id="button2" name="btn1" value="sampe1" onserverclick="btn1_serverclick" style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:110px; cursor:pointer;"/> </a> </div> <div style="width: 230px; height: 230px; float: left; margin-left: 10px"> <a class="metro-tile" style="cursor: pointer; width: 230px; height: 230px; display: block; background-color:#ffd800; color: #fff"> <input type="button" runat="server" id="btn1" name="btn1" value="sampe1" onserverclick="btn1_serverclick" style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:230px; cursor:pointer;"/> </a> </div> <div style="width: 230px; height: 230px; float: left; margin-left: 10px"> <a class="metro-tile" style="cursor: pointer; width: 230px; height: 110px; display: block; background-color:#0094ff; color: #fff; margin-bottom: 10px;"> <input type="button" runat="server" id="button3" name="btn1" value="sampe1" onserverclick="btn1_serverclick" style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:110px; cursor:pointer;"/> </a> <a class="metro-tile" style="cursor: pointer; width: 110px; height: 110px; margin-right: 10px; display: block; float: left; background-color: #4800ff; color: #fff;"> <input type="button" runat="server" id="button4" name="btn1" value="sampe1" onserverclick="btn1_serverclick" style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:110px; height:110px; cursor:pointer;"/> </a> <a class="metro-tile" style="cursor: pointer; width: 110px; height: 110px; display: block; background-color: #b200ff; float: right; color: #fff;"> <input type="button" runat="server" id="button5" name="btn1" value="sampe1" onserverclick="btn1_serverclick" style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:110px; height:110px; cursor:pointer;"/> </a> </div> </div> </div> </div> </div> </form></body> <script src="js/tilejs.js" type="text/javascript"></script></html> |
其中 tilejs是一个开源的构建类似win8 metro风格的javascript库。
编写后台脚本：
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using system;using system.collections.generic;using system.linq;using system.web;using system.web.ui;using system.web.ui.webcontrols;using officeopenxml;using officeopenxml.table;using officeopenxml.conditionalformatting;using officeopenxml.style;using officeopenxml.utils;using officeopenxml.table.pivottable;using system.io;using system.data.sqlclient;using system.data;namespace excelpivot.web{ public partial class index : system.web.ui.page { protected void page_load(object sender, eventargs e) { } private datatable getdatasource() { //createdatatable(); //return productinfo; sqlconnection conn = new sqlconnection(); conn.connectionstring = "data source=.;initial catalog=olap;persist security info=true;user id=sa;password=sa"; conn.open(); sqldataadapter ada = new sqldataadapter("select * from v_pm_olap_test", conn); dataset ds = new dataset(); ada.fill(ds); return ds.tables[0]; } protected void btn1_serverclick(object sender, eventargs e) { try { datatable table = getdatasource(); string path = "_demo_" + system.guid.newguid().tostring().replace("-", "_") + ".xls"; //string path = "_demo.xls"; fileinfo fileinfo = new fileinfo(path); var excel = new excelpackage(fileinfo); var wspivot = excel.workbook.worksheets.add("pivot"); var wsdata = excel.workbook.worksheets.add("data"); wsdata.cells["a1"].loadfromdatatable(table, true, officeopenxml.table.tablestyles.medium6); if (table.rows.count != 0) { foreach (datacolumn col in table.columns) { if (col.datatype == typeof(system.datetime)) { var colnumber = col.ordinal + 1; var range = wsdata.cells[2, colnumber, table.rows.count + 1, colnumber]; range.style.numberformat.format = "yyyy-mm-dd"; } else { } } } var datarange = wsdata.cells[wsdata.dimension.address.tostring()]; datarange.autofitcolumns(); var pivottable = wspivot.pivottables.add(wspivot.cells["a1"], datarange, "pivot"); pivottable.multiplefieldfilters = true; pivottable.rowgrandtotals = true; pivottable.columgrandtotals = true; pivottable.compact = true; pivottable.compactdata = true; pivottable.griddropzones = false; pivottable.outline = false; pivottable.outlinedata = false; pivottable.showerror = true; pivottable.errorcaption = "[error]"; pivottable.showheaders = true; pivottable.useautoformatting = true; pivottable.applywidthheightformats = true; pivottable.showdrill = true; pivottable.firstdatacol = 3; //pivottable.rowheadercaption = "行"; //row field var field004 = pivottable.fields["销售客户经理"]; pivottable.rowfields.add(field004); var field001 = pivottable.fields["项目简称"]; pivottable.rowfields.add(field001); //field001.showall = false; //column field var field002 = pivottable.fields["年"]; pivottable.columnfields.add(field002); field002.sort = officeopenxml.table.pivottable.esorttype.ascending; var field005 = pivottable.fields["月"]; pivottable.columnfields.add(field005); field005.sort = officeopenxml.table.pivottable.esorttype.ascending; //data field var field003 = pivottable.fields["回款金额"]; field003.sort = officeopenxml.table.pivottable.esorttype.descending; pivottable.datafields.add(field003); pivottable.rowgrandtotals = false; pivottable.columgrandtotals = false; //save file excel.save(); //open excel file string file = @"c:\windows\explorer.exe"; system.diagnostics.process.start(file, path); } catch (exception ex) { response.write(ex.message); } } }} |
编译运行，如下图所示：
单击 [回款情况分析]，稍等片刻，会打开excel，并自动生成透视表，如下图所示：
以上就是本文的全部内容，希望对大家的学习有所帮助
