Csharp: read excel file using Open XML SDK 2.5

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; using System.Xml; using DocumentFormat.OpenXml; using DocumentFormat.OpenXml.Packaging; using DocumentFormat.OpenXml.Wordprocessing; using DocumentFormat.OpenXml.Spreadsheet;     namespace OpenXmlOficeDemo {       /// <summary>     /// Open XML SDK 2.0 for Microsoft Office http://www.microsoft.com/en-us/download/details.aspx?id=5124     /// Open XML SDK 2.5 for Microsoft Office http://www.microsoft.com/en-us/download/details.aspx?id=30425     /// Open XML SDK open source  https://github.com/officedev/open-xml-sdk     /// Open XML SDK 2.5 类库参考 https://msdn.microsoft.com/ZH-CN/library/gg278315.aspx     /// http://openxmldeveloper.org/     /// https://github.com/OfficeDev/Open-Xml-PowerTools     /// https://msdn.microsoft.com/en-us/library/office/bb448854.aspx     /// https://github.com/OfficeDev <br>    ///https://msdn.microsoft.com/en-us/library/dd452407(v=office.12).aspxhttps://msdn.microsoft.com/en-us/library/dd452407(v=office.12).aspx       /// </summary>     public partial class Form1 : Form     {           /// <summary>         ///         /// </summary>         public Form1()         {             InitializeComponent();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void Form1_Load(object sender, EventArgs e)         {                           }         /// <summary>         ///         /// </summary>         public class Package         {             public string Company { get; set; }             public double Weight { get; set; }             public long TrackingNumber { get; set; }             public DateTime DateOrder { get; set; }             public bool HasCompleted { get; set; }         }         /// <summary>         /// 生成EXCEL文件         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void button1_Click(object sender, EventArgs e)         {             string timeMark = DateTime.Now.ToString("yyyyMMddHHmmss");             string excelPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "geovindu" + timeMark + ".xlsx");             List<Package> packages =                  new List<Package>                         { new Package { Company = "Coho Vineyard", Weight = 25.2, TrackingNumber = 89453312L, DateOrder = DateTime.Today, HasCompleted = false },                           new Package { Company = "Lucerne Publishing", Weight = 18.7, TrackingNumber = 89112755L, DateOrder = DateTime.Today, HasCompleted = false },                           new Package { Company = "Wingtip Toys", Weight = 6.0, TrackingNumber = 299456122L, DateOrder = DateTime.Today, HasCompleted = false },                           new Package { Company = "Adventure Works", Weight = 33.8, TrackingNumber = 4665518773L, DateOrder =  DateTime.Today.AddDays(-4), HasCompleted = true },                           new Package { Company = "Test Works", Weight = 35.8, TrackingNumber = 4665518774L, DateOrder =  DateTime.Today.AddDays(-2), HasCompleted = true },                           new Package { Company = "Good Works", Weight = 48.8, TrackingNumber = 4665518775L, DateOrder =  DateTime.Today.AddDays(-1), HasCompleted = true },                           };               List<string> headerNames = new List<string> { "Company", "Weight", "Tracking Number", "Date Order", "Completed" };             ExcelFacade excelFacade = new ExcelFacade();             excelFacade.Create<Package>(excelPath, packages, "Packages", headerNames);         }           /// <summary>         /// 读取工作表         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void button2_Click(object sender, EventArgs e)         {               string file = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Sample.xlsx");             List<SheetNameInfo> sheets = new List<SheetNameInfo>();             sheets = GetSheetsDu(file);             this.comboBox1.DataSource = sheets;             comboBox1.DisplayMember = "SheetName";             comboBox1.ValueMember = "SheetID";             //1             //OpenXmlOficeDemo.SLExcelUtility.SLExcelReader read = new SLExcelUtility.SLExcelReader();             //var data = (new OpenXmlOficeDemo.SLExcelUtility.SLExcelReader()).ReadExcel(file);             //this.dataGridView1.DataSource = data.DataRows;             //2             //FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read);             //DataTable dt = ReadAsDataTable(file);             //this.dataGridView1.DataSource = dt;            // fs.Close();            // fs.Dispose();           }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void button3_Click(object sender, EventArgs e)         {             string file = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Sample.xlsx");             //FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read);             DataTable dt = ReadAsDataTable(file);// ReadExcel(this.comboBox1.SelectedText, fs);             this.dataGridView1.DataSource = dt;             //fs.Close();             //fs.Dispose();         }           /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void button4_Click(object sender, EventArgs e)         {               DataSet ds = new DataSet();             string filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Sample.xlsx");             SpreadsheetDocument document = SpreadsheetDocument.Open(filePath, false);            // var sheets = document.WorkbookPart.Workbook.Descendants<Sheet>();             var sheets = document.WorkbookPart.Workbook.Sheets;             foreach (Sheet sheet in sheets)             {                 //sheet.Id                 // sheet.Name                                     // sheet.SheetId                 foreach (var attr in sheet.GetAttributes())                               {                                          Console.WriteLine("{0}: {1}", attr.LocalName, attr.Value);//工作表名                 }             }             WorkbookPart wbPart = document.WorkbookPart; ;             //SharedStringTable sharedStringTable = wbPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault().SharedStringTable;             // SharedStringTable sharedStringTable = document.WorkbookPart.SharedStringTablePart.SharedStringTable;             string cellValue = null;             foreach (WorksheetPart worksheetPart in document.WorkbookPart.WorksheetParts)             {                                   //foreach (Sheet sheet in sheets)                                     foreach (SheetData sheetData in worksheetPart.Worksheet.Elements<SheetData>())                 {                     DataTable dataTable = new DataTable();                     if (sheetData.HasChildren)                     {                         foreach (Row row in sheetData.Elements<Row>())                         {                               //foreach (Cell cell in row.ElementAt(0))                             //{                             //    dataTable.Columns.Add(GetCellValue(document, cell)); //标题                             //    string tile= GetCellValue(document, cell); //标题                             //     MessageBox.Show(tile);                             //}                               foreach (Cell cell in row.Elements<Cell>())                             {                                   //string tile= GetCellValue(document, cell); //标题                              // MessageBox.Show(tile);                                 cellValue = cell.InnerText;                                   if (cell.DataType == CellValues.SharedString)                                 {                                     Console.WriteLine("cell val: " );//+ sharedStringTable.ElementAt(Int32.Parse(cellValue)).InnerText);                                 }                                 else                                 {                                     Console.WriteLine("cell val: " + cellValue);                                 }                             }                         }                     }                 }             }             document.Close();               }           /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void button5_Click(object sender, EventArgs e)         {             try             {                 string file = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Sample.xlsx");                 DataTable dt = new DataTable();                 string sheename = this.comboBox1.Text;                 dt = ReadIdDataTable(file, sheename);                 this.dataGridView1.DataSource = dt;             }             catch (Exception ex)             {                 ex.Message.ToString();             }               }         /// <summary>         /// 读取工作表名         /// 涂聚文         /// </summary>         /// <param name="strFileName"></param>         /// <returns></returns>         public static List<SheetNameInfo> GetSheetsDu(String strFileName)         {             List<SheetNameInfo> sheetinfo = new List<SheetNameInfo>();             using (SpreadsheetDocument document = SpreadsheetDocument.Open(strFileName, false))             {                  var sheets = document.WorkbookPart.Workbook.Sheets;                  int k = 0;                  foreach (Sheet sheet in sheets)                  {                      SheetNameInfo sheetNameInfo = new SheetNameInfo();                      sheetNameInfo.SheetName = sheet.Name;                      sheetNameInfo.Rid = sheet.Id;                      sheetNameInfo.SheetID = k;//                      sheetinfo.Add(sheetNameInfo);                      k++;                  }             }               return sheetinfo;           }           /// <summary>         /// 读取工作表名         /// EXCEL 2007版以上         /// </summary>         /// <param name="strFileName"></param>         /// <returns></returns>         public static List<SheetNameInfo> GetSheets(String strFileName)         {             string id = string.Empty;             //  Fill this collection with a list of all the sheets.             List<SheetNameInfo> sheets = new List<SheetNameInfo>();             using (SpreadsheetDocument xlPackage = SpreadsheetDocument.Open(strFileName, false))             {                   WorkbookPart workbook = xlPackage.WorkbookPart;                 Stream workbookstr = workbook.GetStream();                 XmlDocument doc = new XmlDocument();                 doc.Load(workbookstr);                 XmlNamespaceManager nsManager = new XmlNamespaceManager(doc.NameTable);                 nsManager.AddNamespace("default", doc.DocumentElement.NamespaceURI);                 XmlNodeList nodelist = doc.SelectNodes("//default:sheets/default:sheet", nsManager);                 int k = 0;                 foreach (XmlNode node in nodelist)                 {                     SheetNameInfo sheetNameInfo = new SheetNameInfo();                     String sheetName = String.Empty;                     sheetName = node.Attributes["name"].Value;                    // id = node.Attributes["id"].Value;                     sheetNameInfo.SheetID = int.Parse(node.Attributes["sheetId"].Value.ToString());                     sheetNameInfo.Rid = node.Attributes["r:id"].Value;                     sheetNameInfo.SheetName = sheetName;                     sheets.Add(sheetNameInfo);                     k++;                 }             }             return sheets;         }         /// <summary>         ///         /// </summary>         /// <param name="cell"></param>         /// <param name="stringTablePart"></param>         /// <returns></returns>         public static String GetValue(Cell cell, SharedStringTablePart stringTablePart)         {               if (cell.ChildElements.Count == 0)                 return null;             //get cell value             String value = cell.CellValue.InnerText;             //Look up real value from shared string table             if ((cell.DataType != null) && (cell.DataType == CellValues.SharedString))                 value = stringTablePart.SharedStringTable                 .ChildElements[Int32.Parse(value)]                 .InnerText;             return value;           }         /// <summary>         ///         /// </summary>         /// <param name="fileName"></param>         /// <returns></returns>         public static DataTable ReadAsDataTable(string fileName)         {             int numID = 0;             DataTable dataTable = new DataTable();             using (SpreadsheetDocument spreadSheetDocument = SpreadsheetDocument.Open(fileName, false))             {                 WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;                   //spreadSheetDocument.WorkbookPart.Workbook.Sheets;                   IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();//第一个工作表                 string relationshipId = sheets.First().Id.Value; //工作表                 numID = sheets.Count();                 WorksheetPart worksheetPart = (WorksheetPart)spreadSheetDocument.WorkbookPart.GetPartById(relationshipId);//第一个工作表                                  Worksheet workSheet = worksheetPart.Worksheet;                 SheetData sheetData = workSheet.GetFirstChild<SheetData>();                 IEnumerable<Row> rows = sheetData.Descendants<Row>();                   foreach (Cell cell in rows.ElementAt(0))                 {                     dataTable.Columns.Add(GetCellValue(spreadSheetDocument, cell)); //标题                 }                   foreach (Row row in rows)                 {                     DataRow dataRow = dataTable.NewRow();                     for (int i = 0; i < row.Descendants<Cell>().Count(); i++)                     {                         dataRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));                     }                       dataTable.Rows.Add(dataRow);                 }               }             dataTable.Rows.RemoveAt(0);             return dataTable;         }         /// <summary>         /// 涂聚文         /// 20150820         /// 七夕节         /// </summary>         /// <param name="fileName">文件名</param>         /// <param name="sheetName">工作表名</param>         /// <returns></returns>         public static DataTable ReadIdDataTable(string fileName, string sheetName)         {                           DataTable dataTable = new DataTable();             using (SpreadsheetDocument spreadSheetDocument = SpreadsheetDocument.Open(fileName, false))             {                 WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;                   //spreadSheetDocument.WorkbookPart.Workbook.Sheets;                 Sheet theSheet = workbookPart.Workbook.Descendants<Sheet>().Where(s => s.Name == sheetName).FirstOrDefault();                   //IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();//第一个工作表                 //string relationshipId = theSheet.FirstOrDefault().ExtendedAttributes.ElementAt(0); //工作表                // numID = sheets.Count();                 WorksheetPart worksheetPart = (WorksheetPart)spreadSheetDocument.WorkbookPart.GetPartById(theSheet.Id);//第一个工作表                    Worksheet workSheet = worksheetPart.Worksheet;                 SheetData sheetData = workSheet.GetFirstChild<SheetData>();                 IEnumerable<Row> rows = sheetData.Descendants<Row>();                   foreach (Cell cell in rows.ElementAt(0))                 {                     dataTable.Columns.Add(GetCellValue(spreadSheetDocument, cell)); //标题                 }                   foreach (Row row in rows)                 {                     DataRow dataRow = dataTable.NewRow();                     for (int i = 0; i < row.Descendants<Cell>().Count(); i++)                     {                         dataRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));                     }                       dataTable.Rows.Add(dataRow);                 }               }             dataTable.Rows.RemoveAt(0);             return dataTable;         }         /// <summary>         ///         /// </summary>         /// <param name="document"></param>         /// <param name="cell"></param>         /// <returns></returns>         private static string GetCellValue(SpreadsheetDocument document, Cell cell)         {             SharedStringTablePart stringTablePart = document.WorkbookPart.SharedStringTablePart;             string value = cell.CellValue.InnerXml;               if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)             {                 return stringTablePart.SharedStringTable.ChildElements[Int32.Parse(value)].InnerText;             }             else             {                 return value;             }         }         /// <summary>         ///         /// </summary>         /// <param name="fileName"></param>         /// <param name="sheetName"></param>         /// <param name="addressName"></param>         /// <returns></returns>         private static string GetCellValue(string fileName, string sheetName, string addressName)         {             string value = null;               using (SpreadsheetDocument document = SpreadsheetDocument.Open(fileName, false))             {                 WorkbookPart wbPart = document.WorkbookPart;                   // Find the sheet with the supplied name, and then use that Sheet                 // object to retrieve a reference to the appropriate worksheet.                 Sheet theSheet = wbPart.Workbook.Descendants<Sheet>().Where(s => s.Name == sheetName).FirstOrDefault();                 if (theSheet == null)                 {                     throw new ArgumentException("sheetName");                 }                 // Retrieve a reference to the worksheet part, and then use its                 // Worksheet property to get a reference to the cell whose                 // address matches the address you supplied:                 WorksheetPart wsPart = (WorksheetPart)(wbPart.GetPartById(theSheet.Id));                   Cell theCell = wsPart.Worksheet.Descendants<Cell>().Where(c => c.CellReference == addressName).FirstOrDefault();                 // If the cell does not exist, return an empty string:                 if (theCell != null)                 {                     value = theCell.InnerText;                     // If the cell represents a numeric value, you are done.                     // For dates, this code returns the serialized value that                     // represents the date. The code handles strings and Booleans                     // individually. For shared strings, the code looks up the                     // corresponding value in the shared string table. For Booleans,                     // the code converts the value into the words TRUE or FALSE.                     if (theCell.DataType != null)                     {                         switch (theCell.DataType.Value)                         {                             case CellValues.SharedString:                                 // For shared strings, look up the value in the shared                                 // strings table.                                 var stringTable = wbPart.                                   GetPartsOfType<SharedStringTablePart>().FirstOrDefault();                                 // If the shared string table is missing, something is                                 // wrong. Return the index that you found in the cell.                                 // Otherwise, look up the correct text in the table.                                 if (stringTable != null)                                 {                                     value = stringTable.SharedStringTable.                                       ElementAt(int.Parse(value)).InnerText;                                 }                                 break;                               case CellValues.Boolean:                                 switch (value)                                 {                                     case "0":                                         value = "FALSE";                                         break;                                     default:                                         value = "TRUE";                                         break;                                 }                                 break;                         }                     }                 }             }             return value;         }

　　

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/// <summary>    ///    /// </summary>    public class SheetNameInfo    {        private int _sheetId;        private string _sheetName;          private string _rid;          /// <summary>        ///        /// </summary>        public int SheetID        {            get{return _sheetId;}            set{_sheetId= value;}        }        /// <summary>        ///        /// </summary>        public string SheetName        {            get { return _sheetName; }            set { _sheetName = value; }        }        /// <summary>        ///        /// </summary>        public string Rid        {            get { return _rid; }            set { _rid = value; }        }    }

　

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internal class ExcelHelper     {         internal class ColumnCaption         {             private static string[] Alphabets = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };             private static ColumnCaption instance = null;             private List<string> cellHeaders = null;             public static ColumnCaption Instance             {                 get                 {                     if (instance == null)                         return new ColumnCaption();                     else return ColumnCaption.Instance;                 }             }               public ColumnCaption()             {                 this.InitCollection();             }               private void InitCollection()             {                 cellHeaders = new List<string>();                   foreach (string sItem in Alphabets)                     cellHeaders.Add(sItem);                   foreach (string item in Alphabets)                     foreach (string sItem in Alphabets)                         cellHeaders.Add(item + sItem);             }               /// <summary>             /// Returns the column caption for the given row & column index.             /// </summary>             /// <param name="rowIndex">Index of the row.</param>             /// <param name="columnIndex">Index of the column.</param>             /// <returns></returns>             internal string Get(int rowIndex, int columnIndex)             {                 return this.cellHeaders.ElementAt(columnIndex) + (rowIndex + 1).ToString();             }         }           internal string ExportToExcel(DataTable table)         {             string excelfile = Path.GetTempPath() + Guid.NewGuid().ToString() + ".xlsx";             using (SpreadsheetDocument excelDoc = SpreadsheetDocument.Create(excelfile, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))             {                 CreateExcelParts(excelDoc, table);             }             return excelfile;         }           private void CreateExcelParts(SpreadsheetDocument spreadsheetDoc, DataTable data)         {             WorkbookPart workbookPart = spreadsheetDoc.AddWorkbookPart();             CreateWorkbookPart(workbookPart);               int workBookPartCount = 1;               WorkbookStylesPart workbookStylesPart = workbookPart.AddNewPart<WorkbookStylesPart>("rId" + (workBookPartCount++).ToString());             CreateWorkbookStylesPart(workbookStylesPart);               WorksheetPart worksheetPart = workbookPart.AddNewPart<WorksheetPart>("rId" + (101).ToString());             CreateWorksheetPart(workbookPart.WorksheetParts.ElementAt(0), data);               SharedStringTablePart sharedStringTablePart = workbookPart.AddNewPart<SharedStringTablePart>("rId" + (workBookPartCount++).ToString());             CreateSharedStringTablePart(sharedStringTablePart, data);               workbookPart.Workbook.Save();         }           /// <summary>         /// Creates the shared string table part.         /// </summary>         /// <param name="sharedStringTablePart">The shared string table part.</param>         /// <param name="sheetData">The sheet data.</param>         private void CreateSharedStringTablePart(SharedStringTablePart sharedStringTablePart, DataTable sheetData)         {             UInt32Value stringCount = Convert.ToUInt32(sheetData.Rows.Count) + Convert.ToUInt32(sheetData.Columns.Count);               SharedStringTable sharedStringTable = new SharedStringTable()             {                 Count = stringCount,                 UniqueCount = stringCount             };               for (int columnIndex = 0; columnIndex < sheetData.Columns.Count; columnIndex++)             {                 SharedStringItem sharedStringItem = new SharedStringItem();                 Text text = new Text();                 text.Text = sheetData.Columns[columnIndex].ColumnName;                 sharedStringItem.Append(text);                 sharedStringTable.Append(sharedStringItem);             }               for (int rowIndex = 0; rowIndex < sheetData.Rows.Count; rowIndex++)             {                 SharedStringItem sharedStringItem = new SharedStringItem();                 Text text = new Text();                 text.Text = sheetData.Rows[rowIndex][0].ToString();                 sharedStringItem.Append(text);                 sharedStringTable.Append(sharedStringItem);             }               sharedStringTablePart.SharedStringTable = sharedStringTable;         }           /// <summary>         /// Creates the worksheet part.         /// </summary>         /// <param name="worksheetPart">The worksheet part.</param>         /// <param name="data">The data.</param>         private void CreateWorksheetPart(WorksheetPart worksheetPart, DataTable data)         {             Worksheet worksheet = new Worksheet() { MCAttributes = new MarkupCompatibilityAttributes() { Ignorable = "x14ac" } };             worksheet.AddNamespaceDeclaration("r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships");             worksheet.AddNamespaceDeclaration("mc", "http://schemas.openxmlformats.org/markup-compatibility/2006");             worksheet.AddNamespaceDeclaration("x14ac", "http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac");                 SheetViews sheetViews = new SheetViews();             SheetView sheetView = new SheetView() { WorkbookViewId = (UInt32Value)0U };             Selection selection = new Selection() { ActiveCell = "A1" };             sheetView.Append(selection);             sheetViews.Append(sheetView);               PageMargins pageMargins = new PageMargins()             {                 Left = 0.7D,                 Right = 0.7D,                 Top = 0.75D,                 Bottom = 0.75D,                 Header = 0.3D,                 Footer = 0.3D             };               SheetFormatProperties sheetFormatPr = new SheetFormatProperties()             {                 DefaultRowHeight = 15D,                 DyDescent = 0.25D             };               SheetData sheetData = new SheetData();               UInt32Value rowIndex = 1U;               Row row1 = new Row()             {                 RowIndex = rowIndex++,                 Spans = new ListValue<StringValue>() { InnerText = "1:3" },                 DyDescent = 0.25D             };               for (int columnIndex = 0; columnIndex < data.Columns.Count; columnIndex++)             {                 Cell cell = new Cell() { CellReference = ExcelHelper.ColumnCaption.Instance.Get((Convert.ToInt32((UInt32)rowIndex) - 2), columnIndex), DataType = CellValues.String };                 CellValue cellValue = new CellValue();                 cellValue.Text = data.Columns[columnIndex].ColumnName.ToString().FormatCode();                 cell.Append(cellValue);                   row1.Append(cell);             }             sheetData.Append(row1);               for (int rIndex = 0; rIndex < data.Rows.Count; rIndex++)             {                 Row row = new Row()                 {                     RowIndex = rowIndex++,                     Spans = new ListValue<StringValue>() { InnerText = "1:3" },                     DyDescent = 0.25D                 };                   for (int cIndex = 0; cIndex < data.Columns.Count; cIndex++)                 {                     if (cIndex == 0)                     {                         Cell cell = new Cell() { CellReference = ExcelHelper.ColumnCaption.Instance.Get((Convert.ToInt32((UInt32)rowIndex) - 2), cIndex), DataType = CellValues.String };                         CellValue cellValue = new CellValue();                         cellValue.Text = data.Rows[rIndex][cIndex].ToString();                         cell.Append(cellValue);                           row.Append(cell);                     }                     else                     {                         Cell cell = new Cell() { CellReference = ExcelHelper.ColumnCaption.Instance.Get((Convert.ToInt32((UInt32)rowIndex) - 2), cIndex), DataType = CellValues.String };                         CellValue cellValue = new CellValue();                         cellValue.Text = data.Rows[rIndex][cIndex].ToString();                         cell.Append(cellValue);                           row.Append(cell);                     }                 }                 sheetData.Append(row);             }               worksheet.Append(sheetViews);             worksheet.Append(sheetFormatPr);             worksheet.Append(sheetData);             worksheet.Append(pageMargins);             worksheetPart.Worksheet = worksheet;         }           /// <summary>         /// Creates the workbook styles part.         /// </summary>         /// <param name="workbookStylesPart">The workbook styles part.</param>         private void CreateWorkbookStylesPart(WorkbookStylesPart workbookStylesPart)         {             Stylesheet stylesheet = new Stylesheet() { MCAttributes = new MarkupCompatibilityAttributes() { Ignorable = "x14ac" } };             stylesheet.AddNamespaceDeclaration("mc", "http://schemas.openxmlformats.org/markup-compatibility/2006");             stylesheet.AddNamespaceDeclaration("x14ac", "http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac");               StylesheetExtensionList stylesheetExtensionList = new StylesheetExtensionList();             StylesheetExtension stylesheetExtension = new StylesheetExtension() { Uri = "{EB79DEF2-80B8-43e5-95BD-54CBDDF9020C}" };             stylesheetExtension.AddNamespaceDeclaration("x14", "http://schemas.microsoft.com/office/spreadsheetml/2009/9/main");             DocumentFormat.OpenXml.Office2010.Excel.SlicerStyles slicerStyles = new DocumentFormat.OpenXml.Office2010.Excel.SlicerStyles() { DefaultSlicerStyle = "SlicerStyleLight1" };             stylesheetExtension.Append(slicerStyles);             stylesheetExtensionList.Append(stylesheetExtension);               stylesheet.Append(stylesheetExtensionList);               workbookStylesPart.Stylesheet = stylesheet;         }           /// <summary>         /// Creates the workbook part.         /// </summary>         /// <param name="workbookPart">The workbook part.</param>         private void CreateWorkbookPart(WorkbookPart workbookPart)         {             Workbook workbook = new Workbook();             Sheets sheets = new Sheets();               Sheet sheet = new Sheet()             {                 Name = "Book" + 1,                 SheetId = Convert.ToUInt32(101),                 Id = "rId" + (101).ToString()             };             sheets.Append(sheet);               CalculationProperties calculationProperties = new CalculationProperties()             {                 CalculationId = (UInt32Value)123456U  // some default Int32Value             };               workbook.Append(sheets);             workbook.Append(calculationProperties);               workbookPart.Workbook = workbook;         }       }       public static class Extensions     {         public static string FormatCode(this string sourceString)         {             if (sourceString.Contains("<"))                 sourceString = sourceString.Replace("<", "<");               if (sourceString.Contains(">"))                 sourceString = sourceString.Replace(">", ">");               return sourceString;         }     }

　　

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protected void Page_Load(object sender, EventArgs e) {     if (!IsPostBack)     {         BindGrid();     }     SetChache(); }   private void SetChache() {     Response.Cache.SetCacheability(HttpCacheability.Public);     Response.Cache.SetExpires(DateTime.Now.AddYears(1)); }   private void BindGrid() {     grdvTest.DataSource = new TestData().GetSampleData();     grdvTest.DataBind(); }   protected void btnExport_Click(object sender, EventArgs e) {     DataTable table = new DataTable();     CreateTable(grdvTest, ref table);       string file = new ExcelHelper().ExportToExcel(table);     string rootPath = HttpContext.Current.Server.MapPath("~").ToString();     string localCopy = Guid.NewGuid().ToString() + ".xlsx";     File.Copy(file, rootPath + localCopy);       Response.Redirect(localCopy); }   private void CreateTable(GridView grdvTest, ref DataTable table) {     // create columns     for (int i = 0; i < grdvTest.HeaderRow.Cells.Count; i++)         table.Columns.Add(grdvTest.HeaderRow.Cells[i].Text);       // fill rows     foreach (GridViewRow row in grdvTest.Rows)     {         DataRow dr;         dr = table.NewRow();           for (int i = 0; i < row.Cells.Count; i++)         {             dr[i] = row.Cells[i].Text.Replace(" ", " ");         }         table.Rows.Add(dr);     } }

　　

　https://openxmlexporttoexcel.codeplex.com/

http://www.codeproject.com/Tips/366446/Export-GridView-Data-to-Excel-using-OpenXml

http://www.codeproject.com/Articles/670141/Read-and-Write-Microsoft-Excel-with-Open-XML-SDK

https://www.microsoft.com/en-us/download/details.aspx?id=17985