先上導出代碼 /// <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); //單元格合並動作 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; //設置字體是否有下划線 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，相當於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 } 1. 打開現有的Excel文件 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 2.復制sheet頁 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 注意 這里Copy方法的兩個參數，指是的復制出來新的sheet頁是在指定sheet頁的前面還是后面，上面的例子就是指復制的sheet頁在第一個sheet頁的后面。 3.刪除sheet頁 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(); 4.選中sheet頁 (xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Select(Type.Missing); //選中某個sheet頁 5.另存excel文件 workbook.Saved = true; workbook.SaveCopyAs(filepath); 6.釋放excel資源 workbook.Close(true, Type.Missing, Type.Missing); workbook = null; xlsApp.Quit(); xlsApp = null;
方法2：
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,行數必須小於 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准 { 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 } } }
方法3：
先去官網：http://npoi.codeplex.com/下載需要引入dll（可以選擇.net2.0或者.net4.0的dll），然后在網站中添加引用。
導出代碼：
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();
導入代碼：
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
用法：
首先建立一個空白的工作簿用作測試，並在其中建立空白工作表，在表中建立空白行，在行中建立單元格，並填入內容：
//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");
設置單元格樣式：設置單元格樣式時需要注意，務必創建一個新的樣式對象進行設置，否則會將工作表所有單元格的樣式一同設置，它們應該共享的是一個樣式對象：
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;
設置單元格寬高：
設置單元格的高度實際是設置其所在行高，所以要在單元格所在行上設置行高，行高設置數值好像是像素點的1/20，所以*20以便達到設置效果；
設置單元格的寬度實際上是設置其所在列寬，所以要在單元格所在列上設置（列的設置在工作表上），寬度數值好像是字符的1/256，所以*256以便達到設置效果。
//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);
合並單元格：合並單元格實際上是聲明一個區域，該區域中的單元格將進行合並，合並后的內容與樣式以該區域最左上角的單元格為准。
//設置一個合並單元格區域，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));
添加公式：使用Cell的CellFormula來設置公式，是一個字符串，公式前不需要加=號。
//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\")";
將工作簿寫入文件查看效果：
//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); }