using System; using System.Collections.Generic; using System.Data; using System.IO; using System.Linq; using System.Web; using NPOI.XSSF.UserModel; using NPOI.HSSF.UserModel; using NPOI.HPSF; using NPOI.POIFS.FileSystem; using NPOI.SS.UserModel; namespace SuperMap.RealEstate.Personnel.Common { public class ExcelHelper { private string fileName = null; //文件名 private IWorkbook workbook = null; private FileStream fs = null; private bool disposed; public ExcelHelper(string fileName) { this.fileName = fileName; disposed = false; } public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten) { int i = 0; int j = 0; int count = 0; ISheet sheet = null; fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(); try { if (workbook != null) { sheet = workbook.CreateSheet(sheetName); } else { return -1; } if (isColumnWritten == true) //写入DataTable的列名 { IRow row = sheet.CreateRow(0); for (j = 0; j < data.Columns.Count; ++j) { row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName); } count = 1; } else { count = 0; } for (i = 0; i < data.Rows.Count; ++i) { IRow row = sheet.CreateRow(count); for (j = 0; j < data.Columns.Count; ++j) { row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString()); } ++count; } //workbook.Write(fs); //写入到excel,但这种直接写路径不是 下载那个位置，是虚拟目录上 // 写入到客户端 System.IO.MemoryStream ms = new System.IO.MemoryStream(); workbook.Write(ms); HttpContext.Current.Response.Clear(); HttpContext.Current.Response.Buffer = true; HttpContext.Current.Response.Charset = "utf-8"; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");//设置输出流为简体中文 HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename=" + "年度利率表.xlsx", DateTime.Now.ToString("yyyyMMddHHmmssfff"))); HttpContext.Current.Response.BinaryWrite(ms.ToArray()); HttpContext.Current.Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 HttpContext.Current.Response.End(); workbook = null; ms.Close(); ms.Dispose(); return count; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); return -1; } } public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; try { fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); //if (fileName.IndexOf(".xlsx") > 0) // 2007版本 // workbook = new XSSFWorkbook(fs); //else if (fileName.IndexOf(".xls") > 0) // 2003版本 // workbook = new HSSFWorkbook(fs); try { workbook = new XSSFWorkbook(fs); } catch { workbook = new HSSFWorkbook(fs); } if (sheetName != null) { sheet = workbook.GetSheet(sheetName); if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet { sheet = workbook.GetSheetAt(0); } } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { IRow firstRow = sheet.GetRow(1); int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数 if (isFirstRowColumn) { for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { ICell cell = firstRow.GetCell(i); if (cell != null) { string cellValue = cell.StringCellValue; if (cellValue != null) { DataColumn column = new DataColumn(cellValue); data.Columns.Add(column); } } } startRow = sheet.FirstRowNum + 1; } else { startRow = sheet.FirstRowNum; } //最后一列的标号 int rowCount = sheet.LastRowNum; for (int i = startRow; i <= rowCount; ++i) { IRow row = sheet.GetRow(i); if (row == null) continue; //没有数据的行默认是null　　　　　　　 DataRow dataRow = data.NewRow(); for (int j = row.FirstCellNum; j < cellCount; ++j) { if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null dataRow[j] = row.GetCell(j).ToString(); } data.Rows.Add(dataRow); } } return data; } catch (Exception ex) { throw ex; } } public DataTable ExcelToDataTableOvertime(string sheetName, bool isFirstRowColumn) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; try { fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); //if (fileName.IndexOf(".xlsx") > 0) // 2007版本 // workbook = new XSSFWorkbook(fs); //else if (fileName.IndexOf(".xls") > 0) // 2003版本 // workbook = new HSSFWorkbook(fs); try { workbook = new XSSFWorkbook(fs); } catch { workbook = new HSSFWorkbook(fs); } if (sheetName != null) { sheet = workbook.GetSheet(sheetName); if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet { sheet = workbook.GetSheetAt(0); } } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { IRow firstRow = sheet.GetRow(1); int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数 if (isFirstRowColumn) { for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { ICell cell = firstRow.GetCell(i); if (cell != null) { string cellValue = cell.StringCellValue; if (cellValue != null) { DataColumn column = new DataColumn(cellValue); if (data.Columns.Contains(column.Caption)) { column.ColumnName+=i.ToString(); } data.Columns.Add(column); } } } startRow = sheet.FirstRowNum + 1; } else { startRow = sheet.FirstRowNum; } //最后一列的标号 int rowCount = sheet.LastRowNum; for (int i = startRow; i <= rowCount; ++i) { IRow row = sheet.GetRow(i); if (row == null) continue; //没有数据的行默认是null　　　　　　　 DataRow dataRow = data.NewRow(); for (int j = row.FirstCellNum; j < cellCount; ++j) { if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null dataRow[j] = row.GetCell(j).ToString(); } data.Rows.Add(dataRow); } } return data; } catch (Exception ex) { throw ex; } } public void ExcelExport(string sheetName, bool isFirstRowColumn) { try { fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(fs); // 写入到客户端 System.IO.MemoryStream ms = new System.IO.MemoryStream(); workbook.Write(ms); string downloadName = "导入模板表格.xls"; HttpContext.Current.Response.Clear(); HttpContext.Current.Response.Buffer = true; HttpContext.Current.Response.Charset = "gb2312"; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");//设置输出流为简体中文 if (HttpContext.Current.Request.Browser.Browser == "IE") downloadName = HttpUtility.UrlPathEncode(downloadName); string headerValue = string.Format("attachment; filename=\"{0}\"", downloadName); HttpContext.Current.Response.AddHeader("Content-Disposition", headerValue); HttpContext.Current.Response.ContentType = "application/octet-stream";//设置输出文件类型为excel文件。 HttpContext.Current.Response.BinaryWrite(ms.ToArray()); HttpContext.Current.Response.End(); workbook = null; ms.Close(); ms.Dispose(); } catch (Exception ex) { throw ex; } } } }