C#利用NOPI处理Excel的代码
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 |
using System; using System.Data; using System.IO; using System.Text; using System.Web; using NPOI.HPSF; using NPOI.HSSF.UserModel; using NPOI.SS.UserModel; public class ExcelHelper { /// <summary> /// DataTable导出到Excel文件 /// </summary> /// <param name="dtSource">源DataTable</param> /// <param name="strHeaderText">表头文本</param> /// <param name="strFileName">保存位置</param> /// <param name="strSheetName">工作表名称</param> /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author> public static void Export(DataTable dtSource, string strHeaderText, string strFileName, string strSheetName, string[] oldColumnNames, string[] newColumnNames) { if (strSheetName == "") { strSheetName = "Sheet"; } using (MemoryStream ms = Export(dtSource, strHeaderText, strSheetName, oldColumnNames, newColumnNames)) { using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write)) { byte[] data = ms.ToArray(); fs.Write(data, 0, data.Length); fs.Flush(); } } } /// <summary> /// DataTable导出到Excel的MemoryStream /// </summary> /// <param name="dtSource">源DataTable</param> /// <param name="strHeaderText">表头文本</param> /// <param name="strSheetName">工作表名称</param> /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author> public static MemoryStream Export(DataTable dtSource, string strHeaderText, string strSheetName, string[] oldColumnNames, string[] newColumnNames) { if (oldColumnNames.Length != newColumnNames.Length) { return new MemoryStream(); } HSSFWorkbook workbook = new HSSFWorkbook(); //HSSFSheet sheet = workbook.CreateSheet();// workbook.CreateSheet(); ISheet sheet = workbook.CreateSheet(strSheetName); #region 右击文件 属性信息 { DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation(); dsi.Company = "http://....../"; workbook.DocumentSummaryInformation = dsi; SummaryInformation si = PropertySetFactory.CreateSummaryInformation(); if (HttpContext.Current.Session["realname"] != null) { si.Author = HttpContext.Current.Session["realname"].ToString(); } else { if (HttpContext.Current.Session["username"] != null) { si.Author = HttpContext.Current.Session["username"].ToString(); } } //填加xls文件作者信息 si.ApplicationName = "NPOI"; //填加xls文件创建程序信息 si.LastAuthor = "OA系统"; //填加xls文件最后保存者信息 si.Comments = "OA系统自动创建文件"; //填加xls文件作者信息 si.Title = strHeaderText; //填加xls文件标题信息 si.Subject = strHeaderText; //填加文件主题信息 si.CreateDateTime = DateTime.Now; workbook.SummaryInformation = si; } #endregion ICellStyle dateStyle = workbook.CreateCellStyle(); IDataFormat format = workbook.CreateDataFormat(); dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd"); #region 取得列宽 int[] arrColWidth = new int[oldColumnNames.Length]; for (int i = 0; i < oldColumnNames.Length; i++) { arrColWidth[i] = Encoding.GetEncoding(936).GetBytes(newColumnNames[i]).Length; } /* foreach (DataColumn item in dtSource.Columns) { arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length; } * */ for (int i = 0; i < dtSource.Rows.Count; i++) { for (int j = 0; j < oldColumnNames.Length; j++) { int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][oldColumnNames[j]].ToString()).Length; if (intTemp > arrColWidth[j]) { arrColWidth[j] = intTemp; } } /* for (int j = 0; j < dtSource.Columns.Count; j++) { int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length; if (intTemp > arrColWidth[j]) { arrColWidth[j] = intTemp; } } * */ } #endregion int rowIndex = 0; foreach (DataRow row in dtSource.Rows) { #region 新建表,填充表头,填充列头,样式 if (rowIndex == 65535 || rowIndex == 0) { if (rowIndex != 0) { sheet = workbook.CreateSheet(strSheetName + ((int)rowIndex/65535).ToString()); } #region 表头及样式 { IRow headerRow = sheet.CreateRow(0); headerRow.HeightInPoints = 25; headerRow.CreateCell(0).SetCellValue(strHeaderText); ICellStyle headStyle = workbook.CreateCellStyle(); headStyle.Alignment = HorizontalAlignment.CENTER; IFont font = workbook.CreateFont(); font.FontHeightInPoints = 20; font.Boldweight = 700; headStyle.SetFont(font); headerRow.GetCell(0).CellStyle = headStyle; //sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1)); sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1)); } #endregion #region 列头及样式 { //HSSFRow headerRow = sheet.CreateRow(1); IRow headerRow = sheet.CreateRow(1); ICellStyle headStyle = workbook.CreateCellStyle(); headStyle.Alignment = HorizontalAlignment.CENTER; IFont font = workbook.CreateFont(); font.FontHeightInPoints = 10; font.Boldweight = 700; headStyle.SetFont(font); for (int i = 0; i < oldColumnNames.Length; i++) { headerRow.CreateCell(i).SetCellValue(newColumnNames[i]); headerRow.GetCell(i).CellStyle = headStyle; //设置列宽 sheet.SetColumnWidth(i, (arrColWidth[i] + 1) * 256); } /* foreach (DataColumn column in dtSource.Columns) { headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName); headerRow.GetCell(column.Ordinal).CellStyle = headStyle; //设置列宽 sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256); } * */ } #endregion rowIndex = 2; } #endregion #region 填充内容 IRow dataRow = sheet.CreateRow(rowIndex); //foreach (DataColumn column in dtSource.Columns) for(int i=0;i<oldColumnNames.Length;i++) { ICell newCell = dataRow.CreateCell(i); string drValue = row[oldColumnNames[i]].ToString(); switch (dtSource.Columns[oldColumnNames[i]].DataType.ToString()) { case "System.String"://字符串类型 newCell.SetCellValue(drValue); break; case "System.DateTime"://日期类型 DateTime dateV; DateTime.TryParse(drValue, out dateV); newCell.SetCellValue(dateV); newCell.CellStyle = dateStyle;//格式化显示 break; case "System.Boolean"://布尔型 bool boolV = false; bool.TryParse(drValue, out boolV); newCell.SetCellValue(boolV); break; case "System.Int16"://整型 case "System.Int32": case "System.Int64": case "System.Byte": int intV = 0; int.TryParse(drValue, out intV); newCell.SetCellValue(intV); break; case "System.Decimal"://浮点型 case "System.Double": double doubV = 0; double.TryParse(drValue, out doubV); newCell.SetCellValue(doubV); break; case "System.DBNull"://空值处理 newCell.SetCellValue(""); break; default: newCell.SetCellValue(""); break; } } #endregion rowIndex++; } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); ms.Flush(); ms.Position = 0; //sheet.Dispose(); sheet = null; workbook = null; //workbook.Dispose();//一般只用写这一个就OK了,他会遍历并释放所有资源,但当前版本有问题所以只释放sheet return ms; } } /// <summary> /// WEB导出DataTable到Excel /// </summary> /// <param name="dtSource">源DataTable</param> /// <param name="strHeaderText">表头文本</param> /// <param name="strFileName">文件名</param> /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author> public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName) { ExportByWeb(dtSource, strHeaderText, strFileName, "sheet"); } /// <summary> /// WEB导出DataTable到Excel /// </summary> /// <param name="dtSource">源DataTable</param> /// <param name="strHeaderText">表头文本</param> /// <param name="strFileName">输出文件名,包含扩展名</param> /// <param name="oldColumnNames">要导出的DataTable列数组</param> /// <param name="newColumnNames">导出后的对应列名</param> public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName, string[] oldColumnNames, string[] newColumnNames) { ExportByWeb(dtSource, strHeaderText, strFileName, "sheet",oldColumnNames,newColumnNames); } /// <summary> /// WEB导出DataTable到Excel /// </summary> /// <param name="dtSource">源DataTable</param> /// <param name="strHeaderText">表头文本</param> /// <param name="strFileName">输出文件名</param> /// <param name="strSheetName">工作表名称</param> public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName, string strSheetName) { HttpContext curContext = HttpContext.Current; // 设置编码和附件格式 curContext.Response.ContentType = "application/vnd.ms-excel"; curContext.Response.ContentEncoding = Encoding.UTF8; curContext.Response.Charset = ""; curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8)); //生成列 string columns = ""; for (int i = 0; i < dtSource.Columns.Count; i++) { if (i > 0) { columns += ","; } columns += dtSource.Columns[i].ColumnName; } curContext.Response.BinaryWrite(Export(dtSource, strHeaderText,strSheetName,columns.Split(','),columns.Split(',')).GetBuffer()); curContext.Response.End(); } /// <summary> /// 导出DataTable到Excel /// </summary> /// <param name="dtSource">要导出的DataTable</param> /// <param name="strHeaderText">标题文字</param> /// <param name="strFileName">文件名,包含扩展名</param> /// <param name="strSheetName">工作表名</param> /// <param name="oldColumnNames">要导出的DataTable列数组</param> /// <param name="newColumnNames">导出后的对应列名</param> public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName, string strSheetName, string[] oldColumnNames, string[] newColumnNames) { HttpContext curContext = HttpContext.Current; // 设置编码和附件格式 curContext.Response.ContentType = "application/vnd.ms-excel"; curContext.Response.ContentEncoding = Encoding.UTF8; curContext.Response.Charset = ""; curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8)); curContext.Response.BinaryWrite(Export(dtSource, strHeaderText, strSheetName,oldColumnNames,newColumnNames).GetBuffer()); curContext.Response.End(); } /// <summary>读取excel /// 默认第一行为表头,导入第一个工作表 /// </summary> /// <param name="strFileName">excel文档路径</param> /// <returns></returns> public static DataTable Import(string strFileName) { DataTable dt = new DataTable(); HSSFWorkbook hssfworkbook; using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read)) { hssfworkbook = new HSSFWorkbook(file); } ISheet sheet = hssfworkbook.GetSheetAt(0); System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); IRow headerRow = sheet.GetRow(0); int cellCount = headerRow.LastCellNum; for (int j = 0; j < cellCount; j++) { ICell cell = headerRow.GetCell(j); dt.Columns.Add(cell.ToString()); } for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++) { IRow row = sheet.GetRow(i); DataRow dataRow = dt.NewRow(); for (int j = row.FirstCellNum; j < cellCount; j++) { if (row.GetCell(j) != null) dataRow[j] = row.GetCell(j).ToString(); } dt.Rows.Add(dataRow); } return dt; } /// <summary> /// 从Excel中获取数据到DataTable /// </summary> /// <param name="strFileName">Excel文件全路径(服务器路径)</param> /// <param name="SheetName">要获取数据的工作表名称</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> public static DataTable RenderDataTableFromExcel(string strFileName, string SheetName, int HeaderRowIndex) { using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read)) { IWorkbook workbook = new HSSFWorkbook(file); return RenderDataTableFromExcel(workbook, SheetName, HeaderRowIndex); } } /// <summary> /// 从Excel中获取数据到DataTable /// </summary> /// <param name="strFileName">Excel文件全路径(服务器路径)</param> /// <param name="SheetIndex">要获取数据的工作表序号(从0开始)</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> public static DataTable RenderDataTableFromExcel(string strFileName, int SheetIndex, int HeaderRowIndex) { using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read)) { IWorkbook workbook = new HSSFWorkbook(file); string SheetName = workbook.GetSheetName(SheetIndex); return RenderDataTableFromExcel(workbook, SheetName, HeaderRowIndex); } } /// <summary> /// 从Excel中获取数据到DataTable /// </summary> /// <param name="ExcelFileStream">Excel文件流</param> /// <param name="SheetName">要获取数据的工作表名称</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> public static DataTable RenderDataTableFromExcel(Stream ExcelFileStream, string SheetName, int HeaderRowIndex) { IWorkbook workbook = new HSSFWorkbook(ExcelFileStream); ExcelFileStream.Close(); return RenderDataTableFromExcel(workbook, SheetName, HeaderRowIndex); } /// <summary> /// 从Excel中获取数据到DataTable /// </summary> /// <param name="ExcelFileStream">Excel文件流</param> /// <param name="SheetIndex">要获取数据的工作表序号(从0开始)</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> public static DataTable RenderDataTableFromExcel(Stream ExcelFileStream, int SheetIndex, int HeaderRowIndex) { IWorkbook workbook = new HSSFWorkbook(ExcelFileStream); ExcelFileStream.Close(); string SheetName = workbook.GetSheetName(SheetIndex); return RenderDataTableFromExcel(workbook, SheetName, HeaderRowIndex); } /// <summary> /// 从Excel中获取数据到DataTable /// </summary> /// <param name="workbook">要处理的工作薄</param> /// <param name="SheetName">要获取数据的工作表名称</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> public static DataTable RenderDataTableFromExcel(IWorkbook workbook, string SheetName, int HeaderRowIndex) { ISheet sheet = workbook.GetSheet(SheetName); DataTable table = new DataTable(); try { IRow headerRow = sheet.GetRow(HeaderRowIndex); int cellCount = headerRow.LastCellNum; for (int i = headerRow.FirstCellNum; i < cellCount; i++) { DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue); table.Columns.Add(column); } int rowCount = sheet.LastRowNum; #region 循环各行各列,写入数据到DataTable for (int i = (sheet.FirstRowNum + 1); i < sheet.LastRowNum; i++) { IRow row = sheet.GetRow(i); DataRow dataRow = table.NewRow(); for (int j = row.FirstCellNum; j < cellCount; j++) { ICell cell = row.GetCell(j); if (cell == null) { dataRow[j] = null; } else { //dataRow[j] = cell.ToString(); switch (cell.CellType) { case CellType.BLANK: dataRow[j] = null; break; case CellType.BOOLEAN: dataRow[j] = cell.BooleanCellValue; break; case CellType.NUMERIC: dataRow[j] = cell.ToString(); break; case CellType.STRING: dataRow[j] = cell.StringCellValue; break; case CellType.ERROR: dataRow[j] = cell.ErrorCellValue; break; case CellType.FORMULA: default: dataRow[j] = "=" + cell.CellFormula; break; } } } table.Rows.Add(dataRow); //dataRow[j] = row.GetCell(j).ToString(); } #endregion } catch (System.Exception ex) { table.Clear(); table.Columns.Clear(); table.Columns.Add("出错了"); DataRow dr = table.NewRow(); dr[0] = ex.Message; table.Rows.Add(dr); return table; } finally { //sheet.Dispose(); workbook = null; sheet = null; } #region 清除最后的空行 for (int i = table.Rows.Count - 1; i > 0; i--) { bool isnull = true; for (int j = 0; j < table.Columns.Count; j++) { if (table.Rows[i][j] != null) { if (table.Rows[i][j].ToString() != "") { isnull = false; break; } } } if (isnull) { table.Rows[i].Delete(); } } #endregion return table; } } |