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 xmlns="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=" 230px; height: 230px; float: left; "> 22 23 <a class="metro-tile" style="cursor: pointer; 230px; height: 110px; display: block; 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=" color:white; font-size:16px;float:left; border:0; 230px; height:110px; cursor:pointer;"/> 27 28 </a> 29 30 <a class="metro-tile" style="cursor: pointer; 230px; height: 110px; display: block; color: #fff;"> 31 <input type="button" runat="server" id="Button2" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 32 style=" color:white; font-size:16px;float:left; border:0; 230px; height:110px; cursor:pointer;"/> 33 </a> 34 </div> 35 36 <div style=" 230px; height: 230px; float: left; margin-left: 10px"> 37 38 <a class="metro-tile" style="cursor: pointer; 230px; height: 230px; display: block; color: #fff"> 39 <input type="button" runat="server" id="btn1" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 40 style=" color:white; font-size:16px;float:left; border:0; 230px; height:230px; cursor:pointer;"/> 41 </a> 42 43 </div> 44 45 <div style=" 230px; height: 230px; float: left; margin-left: 10px"> 46 47 <a class="metro-tile" style="cursor: pointer; 230px; height: 110px; display: block; color: #fff; margin-bottom: 10px;"> 48 <input type="button" runat="server" id="Button3" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 49 style=" color:white; font-size:16px;float:left; border:0; 230px; height:110px; cursor:pointer;"/> 50 </a> 51 52 <a class="metro-tile" style="cursor: pointer; 110px; height: 110px; margin-right: 10px; display: block; float: left; color: #fff;"> 53 <input type="button" runat="server" id="Button4" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 54 style=" color:white; font-size:16px;float:left; border:0; 110px; height:110px; cursor:pointer;"/> 55 </a> 56 57 <a class="metro-tile" style="cursor: pointer; 110px; height: 110px; display: block; float: right; color: #fff;"> 58 <input type="button" runat="server" id="Button5" name="btn1" value="sampe1" onserverclick="btn1_ServerClick" 59 style=" color:white; font-size:16px;float:left; border:0; 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="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 OfficeOpenXml;
8 using OfficeOpenXml.Table;
9 using OfficeOpenXml.ConditionalFormatting;
10 using OfficeOpenXml.Style;
11 using OfficeOpenXml.Utils;
12 using OfficeOpenXml.Table.PivotTable;
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, OfficeOpenXml.Table.TableStyles.Medium6);
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 field
103 var field002 = pivotTable.Fields["年"];
104 pivotTable.ColumnFields.Add(field002);
105 field002.Sort = OfficeOpenXml.Table.PivotTable.eSortType.Ascending;
106 var field005 = pivotTable.Fields["月"];
107 pivotTable.ColumnFields.Add(field005);
108 field005.Sort = OfficeOpenXml.Table.PivotTable.eSortType.Ascending;
109
110 //data field
111 var field003 = pivotTable.Fields["回款金额"];
112 field003.Sort = OfficeOpenXml.Table.PivotTable.eSortType.Descending;
113 pivotTable.DataFields.Add(field003);
114
115 pivotTable.RowGrandTotals = false;
116 pivotTable.ColumGrandTotals = false;
117
118 //save file
119 excel.Save();
120 //open excel file
121 string file = @"C:Windowsexplorer.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：
原文链接：http://www.cnblogs.com/isaboy/p/csharp_excel_pivot_table.html