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：
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="index.aspx.cs" Inherits="ExcelPivot.Web.index" %> 2 3 <!DOCTYPE html> 4 <html ="http://www.w3.org/1999/xhtml"> 5 <head runat="server"> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 7 <title>Excel PivotTable</title> 8 <link rel="stylesheet" type="text/css" href="css/style.css" /> 9 </head>10 <body>11 <form id="form1" runat="server">12 <div id="container">13 14 <div id="contents">15 16 <div id="post">17 <header>18 <h1> Excel PivotTable </h1>19 </header>20 <div id="metro-array" style="display: inline-block;">21 <div style="width: 230px; height: 230px; float: left; ">22 23 <a class="metro-tile" style="cursor: pointer; width: 230px; height: 110px; display: block; background-color:#ff0000; color: #fff; margin-bottom: 10px;">24 25 <input type="button" runat="server" id="Button1" name="btn1" value="回款情况分析" onserverclick="btn1_ServerClick" 26 style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:110px; cursor:pointer;"/>27 28 </a>29 30 <a class="metro-tile" style="cursor: pointer; width: 230px; height: 110px; display: block; background-color:#ff6a00; color: #fff;">31 <input type="button" runat="server" id="Button2" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 32 style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:110px; cursor:pointer;"/>33 </a>34 </div>35 36 <div style="width: 230px; height: 230px; float: left; margin-left: 10px">37 38 <a class="metro-tile" style="cursor: pointer; width: 230px; height: 230px; display: block; background-color:#ffd800; color: #fff">39 <input type="button" runat="server" id="btn1" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 40 style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:230px; cursor:pointer;"/>41 </a>42 43 </div>44 45 <div style="width: 230px; height: 230px; float: left; margin-left: 10px">46 47 <a class="metro-tile" style="cursor: pointer; width: 230px; height: 110px; display: block; background-color:#0094ff; color: #fff; margin-bottom: 10px;">48 <input type="button" runat="server" id="Button3" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 49 style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:230px; height:110px; cursor:pointer;"/>50 </a>51 52 <a class="metro-tile" style="cursor: pointer; width: 110px; height: 110px; margin-right: 10px; display: block; float: left; background-color: #4800ff; color: #fff;">53 <input type="button" runat="server" id="Button4" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 54 style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:110px; height:110px; cursor:pointer;"/>55 </a>56 57 <a class="metro-tile" style="cursor: pointer; width: 110px; height: 110px; display: block; background-color: #b200ff; float: right; color: #fff;">58 <input type="button" runat="server" id="Button5" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 59 style="background-color:transparent; color:white; font-size:16px;float:left; border:0; width:110px; height:110px; cursor:pointer;"/>60 </a>61 </div>62 63 </div>64 </div>65 66 </div>67 </div>68 </form>69 </body>70 <script src='/images/loading.gif' data-original="js/tileJs.js" type="text/javascript"></script>71 </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：
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.UI; 6 using System.Web.UI.WebControls; 7 using OfficeOpen 8 using OfficeOpen 9 using OfficeOpen 10 using OfficeOpen 11 using OfficeOpen 12 using OfficeOpen 13 using System.IO; 14 using System.Data.SqlClient; 15 using System.Data; 16 namespace ExcelPivot.Web 17 { 18 public partial class index : System.Web.UI.Page 19 { 20 protected void Page_Load(object sender, EventArgs e) 21 { 22 23 } 24 private DataTable getDataSource() 25 { 26 //createDataTable(); 27 //return ProductInfo; 28 29 SqlConnection conn = new SqlConnection(); 30 conn.ConnectionString = "Data Source=.;Initial Catalog=olap;Persist Security Info=True;User ID=sa;Password=sa"; 31 conn.Open(); 32 33 SqlDataAdapter ada = new SqlDataAdapter("select * from v_pm_olap_test", conn); 34 DataSet ds = new DataSet(); 35 ada.Fill(ds); 36 37 return ds.Tables[0]; 38 39 40 41 } 42 43 protected void btn1_ServerClick(object sender, EventArgs e) 44 { 45 try 46 { 47 DataTable table = getDataSource(); 48 string path = "_demo_" + System.Guid.NewGuid().ToString().Replace("-", "_") + ".xls"; 49 //string path = "_demo.xls"; 50 FileInfo fileInfo = new FileInfo(path); 51 var excel = new ExcelPackage(fileInfo); 52 53 var wsPivot = excel.Workbook.Worksheets.Add("Pivot"); 54 var wsData = excel.Workbook.Worksheets.Add("Data"); 55 wsData.Cells["A1"].LoadFromDataTable(table, true, OfficeOpen 56 if (table.Rows.Count != 0) 57 { 58 foreach (DataColumn col in table.Columns) 59 { 60 61 if (col.DataType == typeof(System.DateTime)) 62 { 63 var colNumber = col.Ordinal + 1; 64 var range = wsData.Cells[2, colNumber, table.Rows.Count + 1, colNumber]; 65 range.Style.Numberformat.Format = "yyyy-MM-dd"; 66 } 67 else 68 { 69 70 } 71 } 72 } 73 74 var dataRange = wsData.Cells[wsData.Dimension.Address.ToString()]; 75 dataRange.AutoFitColumns(); 76 var pivotTable = wsPivot.PivotTables.Add(wsPivot.Cells["A1"], dataRange, "Pivot"); 77 pivotTable.MultipleFieldFilters = true; 78 pivotTable.RowGrandTotals = true; 79 pivotTable.ColumGrandTotals = true; 80 pivotTable.Compact = true; 81 pivotTable.CompactData = true; 82 pivotTable.GridDropZones = false; 83 pivotTable.Outline = false; 84 pivotTable.OutlineData = false; 85 pivotTable.ShowError = true; 86 pivotTable.ErrorCaption = "[error]"; 87 pivotTable.ShowHeaders = true; 88 pivotTable.UseAutoFormatting = true; 89 pivotTable.ApplyWidthHeightFormats = true; 90 pivotTable.ShowDrill = true; 91 pivotTable.FirstDataCol = 3; 92 //pivotTable.RowHeaderCaption = "行"; 93 94 //row field 95 var field004 = pivotTable.Fields["销售客户经理"]; 96 pivotTable.RowFields.Add(field004); 97 98 var field001 = pivotTable.Fields["项目简称"]; 99 pivotTable.RowFields.Add(field001);100 //field001.ShowAll = false;101 102 //column field103 var field002 = pivotTable.Fields["年"];104 pivotTable.ColumnFields.Add(field002);105 field002.Sort = OfficeOpen106 var field005 = pivotTable.Fields["月"];107 pivotTable.ColumnFields.Add(field005);108 field005.Sort = OfficeOpen109 110 //data field111 var field003 = pivotTable.Fields["回款金额"];112 field003.Sort = OfficeOpen113 pivotTable.DataFields.Add(field003);114 115 pivotTable.RowGrandTotals = false;116 pivotTable.ColumGrandTotals = false;117 118 //save file119 excel.Save();120 //open excel file121 string file = @"C:\Windows\explorer.exe";122 System.Diagnostics.Process.Start(file, path);123 124 }125 catch (Exception ex)126 {127 Response.Write(ex.Message);128 }129 }130 }131 } 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：
原标题：C# 如何在Excel 动态生成PivotTable
关键词：C#
我知道了 