/// <summary>       /// 導出速度最快       /// </summary>       /// <param name="list"><列名，數據></param>       /// <param name="filepath"></param>       /// <returns></returns>       public bool NewExport(List<DictionaryEntry> list, string filepath)       {         bool bSuccess = true;         Microsoft.Office.Interop.Excel.Application appexcel = new Microsoft.Office.Interop.Excel.Application();         System.Reflection.Missing miss = System.Reflection.Missing.Value;         appexcel = new Microsoft.Office.Interop.Excel.Application();         Microsoft.Office.Interop.Excel.Workbook workbookdata = null;         Microsoft.Office.Interop.Excel.Worksheet worksheetdata = null;         Microsoft.Office.Interop.Excel.Range rangedata;            workbookdata = appexcel.Workbooks.Add();            //設置對象不可見         appexcel.Visible = false;         appexcel.DisplayAlerts = false;         try         {           foreach (var lv in list)           {             var keys = lv.Key as List<string>;             var values = lv.Value as List<IList<object>>;             worksheetdata = (Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets.Add(miss, workbookdata.ActiveSheet);                for (int i = 0; i < keys.Count-1; i++)             {               //給工作表賦名稱               worksheetdata.Name = keys[0];//列名的第一個數據位表名               worksheetdata.Cells[1, i + 1] = keys[i+1];             }                //因為第一行已經寫了表頭，所以所有數據都應該從a2開始             rangedata = worksheetdata.get_Range("a2", miss);             Microsoft.Office.Interop.Excel.Range xlrang = null;                //irowcount為實際行數，最大行             int irowcount = values.Count;             int iparstedrow = 0, icurrsize = 0;                //ieachsize為每次寫行的數值，可以自己設置             int ieachsize = 10000;                //icolumnaccount為實際列數，最大列數             int icolumnaccount = keys.Count-1;                //在內存中聲明一個ieachsize×icolumnaccount的數組，ieachsize是每次最大存儲的行數，icolumnaccount就是存儲的實際列數             object[,] objval = new object[ieachsize, icolumnaccount];             icurrsize = ieachsize;                while (iparstedrow < irowcount)             {               if ((irowcount - iparstedrow) < ieachsize)                 icurrsize = irowcount - iparstedrow;                  //用for循環給數組賦值               for (int i = 0; i < icurrsize; i++)               {                 for (int j = 0; j < icolumnaccount; j++)                 {                   var v = values[i + iparstedrow][j];                   objval[i, j] = v != null ? v.ToString() : "";                 }               }               string X = "A" + ((int)(iparstedrow + 2)).ToString();               string col = "";               if (icolumnaccount <= 26)               {                 col = ((char)('A' + icolumnaccount - 1)).ToString() + ((int)(iparstedrow + icurrsize + 1)).ToString();               }               else               {                 col = ((char)('A' + (icolumnaccount / 26 - 1))).ToString() + ((char)('A' + (icolumnaccount % 26 - 1))).ToString() + ((int)(iparstedrow + icurrsize + 1)).ToString();               }               xlrang = worksheetdata.get_Range(X, col);               xlrang.NumberFormat = "@";               // 調用range的value2屬性，把內存中的值賦給excel               xlrang.Value2 = objval;               iparstedrow = iparstedrow + icurrsize;             }           }           ((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets["Sheet1"]).Delete();           ((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets["Sheet2"]).Delete();           ((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets["Sheet3"]).Delete();           //保存工作表           workbookdata.SaveAs(filepath, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);           workbookdata.Close(false, miss, miss);           appexcel.Workbooks.Close();           appexcel.Quit();              System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookdata);           System.Runtime.InteropServices.Marshal.ReleaseComObject(appexcel.Workbooks);           System.Runtime.InteropServices.Marshal.ReleaseComObject(appexcel);           GC.Collect();         }         catch (Exception ex)         {           ErrorMsg = ex.Message;           bSuccess = false;         }         finally         {           if (appexcel != null)           {             ExcelImportHelper.KillSpecialExcel(appexcel);           }         }         return bSuccess;       }

range.NumberFormatLocal = "@";   //設置單元格格式為文本     range = (Range)worksheet.get_Range("A1", "E1");   //獲取Excel多個單元格區域：本例做為Excel表頭     range.Merge(0);   //單元格合并動作     worksheet.Cells[1, 1] = "Excel單元格賦值";   //Excel單元格賦值     range.Font.Size = 15;   //設置字體大小     range.Font.Underline=true;   //設置字體是否有下劃線     range.Font.Name="黑體";    設置字體的種類     range.HorizontalAlignment=XlHAlign.xlHAlignCenter;   //設置字體在單元格內的對其方式     range.ColumnWidth=15;   //設置單元格的寬度     range.Cells.Interior.Color=System.Drawing.Color.FromArgb(255,204,153).ToArgb();   //設置單元格的背景色     range.Borders.LineStyle=1;   //設置單元格邊框的粗細     range.BorderAround(XlLineStyle.xlContinuous,XlBorderWeight.xlThick,XlColorIndex.xlColorIndexAutomatic,System.Drawing.Color.Black.ToArgb());   //給單元格加邊框     range.Borders.get_Item(Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeTop).LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlLineStyleNone; //設置單元格上邊框為無邊框     range.EntireColumn.AutoFit();   //自動調整列寬     Range.HorizontalAlignment= xlCenter;   // 文本水平居中方式     Range.VerticalAlignment= xlCenter   //文本垂直居中方式     Range.WrapText=true;   //文本自動換行     Range.Interior.ColorIndex=39;   //填充顏色為淡紫色     Range.Font.Color=clBlue;   //字體顏色     xlsApp.DisplayAlerts=false;  //對Excel的操作 不彈出提示信息 ApplicationClass xlsApp = new ApplicationClass(); // 1. 創建Excel應用程序對象的一個實例，相當于我們從開始菜單打開Excel應用程序。 if (xlsApp == null) { //對此實例進行驗證，如果為null則表示運行此代碼的機器可能未安裝Excel } 

Workbook workbook = xlsApp.Workbooks.Open(excelFilePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); Worksheet mySheet = workbook.Sheets[1] as Worksheet; //第一個sheet頁 mySheet.Name = "testsheet"; //這里修改sheet名稱 

mySheet.Copy(Type.Missing, workbook.Sheets[1]);//復制mySheet成一個新的sheet頁，復制完后的名稱是mySheet頁名稱后加一個(2)，這里就是testsheet(2)，復制完后，Worksheet的數量增加一個

xlsApp.DisplayAlerts = false; //如果想刪除某個sheet頁，首先要將此項設為fasle。 (xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Delete(); 

workbook.Saved = true; workbook.SaveCopyAs(filepath); 

workbook.Close(true, Type.Missing, Type.Missing); workbook = null; xlsApp.Quit(); xlsApp = null;

using System;using System.Collections.Generic;using System.Linq;using System.Text;using Microsoft.Office.Interop.Excel;using System.Data;namespace ExcelTest{  public class ExcelUtil  {    System.Data.DataTable table11 = new System.Data.DataTable();    public void ExportToExcel(System.Data.DataTable table, string saveFileName)    {      bool fileSaved = false;      //ExcelApp xlApp = new ExcelApp();      Application xlApp = new Application();      if (xlApp == null)      {        return;      }      Workbooks workbooks = xlApp.Workbooks;      Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);      Worksheet worksheet = (Worksheet)workbook.Worksheets[1];//取得sheet1      long rows = table.Rows.Count;      /*下邊注釋的兩行代碼當數據行數超過行時，出現異常：異常來自HRESULT:0x800A03EC。因為：Excel 2003每個sheet只支持最大行數據      //Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count+2, gridview.Columns.View.VisibleColumns.Count+1]);      //fchR.Value2 = datas;*/      if (rows > 65535)      {        long pageRows = 60000;//定義每頁顯示的行數,行數必須小于        int scount = (int)(rows / pageRows);        if (scount * pageRows < table.Rows.Count)//當總行數不被pageRows整除時，經過四舍五入可能頁數不準        {          scount = scount + 1;        }        for (int sc = 1; sc <= scount; sc++)        {          if (sc > 1)          {            object missing = System.Reflection.Missing.Value;            worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add(            missing, missing, missing, missing);//添加一個sheet          }          else          {            worksheet = (Worksheet)workbook.Worksheets[sc];//取得sheet1          }          string[,] datas = new string[pageRows + 1, table.Columns.Count+ 1];for (int i = 0; i < table.Columns.Count; i++) //寫入字段          {            datas[0, i] = table.Columns[i].Caption;          }          Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, table.Columns.Count]);          range.Interior.ColorIndex = 15;//15代表灰色          range.Font.Bold = true;          range.Font.Size = 9;          int init = int.Parse(((sc - 1) * pageRows).ToString());          int r = 0;          int index = 0;          int result;          if (pageRows * sc >= table.Rows.Count)          {            result = table.Rows.Count;          }          else          {            result = int.Parse((pageRows * sc).ToString());          }          for (r = init; r < result; r++)          {            index = index + 1;            for (int i = 0; i < table.Columns.Count; i++)            {              if (table.Columns[i].DataType == typeof(string) || table.Columns[i].DataType == typeof(Decimal) || table.Columns[i].DataType == typeof(DateTime))              {                object obj = table.Rows[r][table.Columns[i].ColumnName];                datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加單引號是為了防止自動轉化格式              }            }          }          Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 2, table.Columns.Count + 1]);          fchR.Value2 = datas;          worksheet.Columns.EntireColumn.AutoFit();//列寬自適應。          range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, table.Columns.Count]);          //15代表灰色          range.Font.Size = 9;          range.RowHeight = 14.25;          range.Borders.LineStyle = 1;          range.HorizontalAlignment = 1;        }      }      else      {        string[,] datas = new string[table.Rows.Count + 2, table.Columns.Count + 1];        for (int i = 0; i < table.Columns.Count; i++) //寫入字段             {          datas[0, i] = table.Columns[i].Caption;        }        Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, table.Columns.Count]);        range.Interior.ColorIndex = 15;//15代表灰色        range.Font.Bold = true;        range.Font.Size = 9;        int r = 0;        for (r = 0; r < table.Rows.Count; r++)        {          for (int i = 0; i < table.Columns.Count; i++)          {            if (table.Columns[i].DataType == typeof(string) || table.Columns[i].DataType == typeof(Decimal) || table.Columns[i].DataType == typeof(DateTime))            {              object obj = table.Rows[r][table.Columns[i].ColumnName];              datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加單引號是為了防止自動轉化格式            }          }          //System.Windows.Forms.Application.DoEvents();}        Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count + 2, table.Columns.Count + 1]);        fchR.Value2 = datas;                worksheet.Columns.EntireColumn.AutoFit();//列寬自適應。        range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count + 1, table.Columns.Count]);        //15代表灰色        range.Font.Size = 9;        range.RowHeight = 14.25;        range.Borders.LineStyle = 1;        range.HorizontalAlignment = 1;      }      if (saveFileName != "")      {        try        {          workbook.Saved = true;          workbook.SaveCopyAs(saveFileName);          fileSaved = true;        }        catch (Exception ex)        {          fileSaved = false;        }      }      else      {        fileSaved = false;      }      xlApp.Quit();      GC.Collect();//強行銷毀       }  }}

NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("test_01");// 第一列NPOI.SS.UserModel.IRow row = sheet.CreateRow(0);row.CreateCell(0).SetCellValue("第一列第一行");// 第二列NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(1);row2.CreateCell(0).SetCellValue("第二列第一行");// ...// 寫入到客戶端 System.IO.MemoryStream ms = new System.IO.MemoryStream();book.Write(ms);Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyyMMddHHmmssfff")));Response.BinaryWrite(ms.ToArray());book = null;ms.Close();ms.Dispose();

HSSFWorkbook hssfworkbook; #region public DataTable ImportExcelFile(string filePath) {   #region//初始化信息   try   {     using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))     {       hssfworkbook = new HSSFWorkbook(file);     }   }   catch (Exception e)   {     throw e;   }   #endregion    NPOI.SS.UserModel.Sheet sheet = hssfworkbook.GetSheetAt(0);   System.Collections.IEnumerator rows = sheet.GetRowEnumerator();   DataTable dt = new DataTable();   for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++)   {     dt.Columns.Add(Convert.ToChar(((int)'A') + j).ToString());   }   while (rows.MoveNext())   {     HSSFRow row = (HSSFRow)rows.Current;     DataRow dr = dt.NewRow();     for (int i = 0; i < row.LastCellNum; i++)     {       NPOI.SS.UserModel.Cell cell = row.GetCell(i);       if (cell == null)       {         dr[i] = null;       }       else       {         dr[i] = cell.ToString();       }     }     dt.Rows.Add(dr);   }   return dt; } #endregion

//建立空白工作簿IWorkbook workbook = new HSSFWorkbook();//在工作簿中：建立空白工作表ISheet sheet = workbook.CreateSheet();//在工作表中：建立行，參數為行號，從0計IRow row = sheet.CreateRow(0);//在行中：建立單元格，參數為列號，從0計ICell cell = row.CreateCell(0);//設置單元格內容cell.SetCellValue("實習鑒定表");

ICellStyle style = workbook.CreateCellStyle();//設置單元格的樣式：水平對齊居中style.Alignment = HorizontalAlignment.CENTER;//新建一個字體樣式對象IFont font = workbook.CreateFont();//設置字體加粗樣式font.Boldweight = short.MaxValue;//使用SetFont方法將字體樣式添加到單元格樣式中 style.SetFont(font);//將新的樣式賦給單元格cell.CellStyle = style;

//設置單元格的高度row.Height = 30 * 20;//設置單元格的寬度sheet.SetColumnWidth(0, 30 * 256);

//設置一個合并單元格區域，使用上下左右定義CellRangeAddress區域//CellRangeAddress四個參數為：起始行，結束行，起始列，結束列sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, 10));

//通過Cell的CellFormula向單元格中寫入公式//注：直接寫公式內容即可，不需要在最前加'='ICell cell2 = sheet.CreateRow(1).CreateCell(0);cell2.CellFormula = "HYPERLINK(/"測試圖片.jpg/",/"測試圖片.jpg/")";

//將工作簿寫入文件using (FileStream fs = new FileStream("生成效果.xls", FileMode.Create, FileAccess.Write)){ workbook.Write(fs);}