using System; using System.Collections.Generic; using System.Linq; using System.Text; using NPOI.SS.UserModel; using NPOI.XSSF.UserModel; using NPOI.HSSF.UserModel; using System.IO; using System.Data; using NPOI.SS.Util; using NPOI.HSSF.Util;// 列 namespace Common.Utility { public class ExcelHelper : IDisposable { 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; } /// <summary> /// 将DataTable数据导入到excel中 /// </summary> /// <param name="data">要导入的数据</param> /// <param name="isColumnWritten">DataTable的列名是否要导入</param> /// <param name="sheetName">要导入的excel的sheet的名称</param> /// <returns>导入数据行数(包含列名那一行)</returns> public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten,string args="") { 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()); if (args == "export_code" && data.Rows[i][j].ToString()=="合计") { SetCellRangeAddress(sheet, i + 1, i + 1, 0, 3); IRow row_1 = sheet.GetRow(i + 1); ICell cell = row_1.GetCell(0); ICellStyle cellstyle = workbook.CreateCellStyle();//设置垂直居中格式 cellstyle.VerticalAlignment = VerticalAlignment.Justify;//垂直居中 cellstyle.Alignment = HorizontalAlignment.Center; cell.CellStyle = cellstyle; } } ++count; } if (args == "export_code") { var oldCode = ""; int n = 0; for (i = 0; i < data.Rows.Count; ++i) { var code = data.Rows[i][1]; if (oldCode == "") { oldCode = code.ToString(); n = i; } if (oldCode != code.ToString()) { SetCellRangeAddress(sheet, n + 1, i, 1, 1); IRow row = sheet.GetRow(n + 1); ICell cell = row.GetCell(1); ICellStyle cellstyle = workbook.CreateCellStyle();//设置垂直居中格式 cellstyle.VerticalAlignment = VerticalAlignment.Justify;//垂直居中 cellstyle.Alignment = HorizontalAlignment.Center; cell.CellStyle = cellstyle; } if (data.Rows[i][4].ToString() == "合计") { oldCode = ""; } } } workbook.Write(fs); //写入到excel return count; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); return -1; } } #region /// <summary> /// 获取单元格样式 /// </summary> /// <param name="hssfworkbook">Excel操作类</param> /// <param name="font">单元格字体</param> /// <param name="fillForegroundColor">图案的颜色</param> /// <param name="fillPattern">图案样式</param> /// <param name="fillBackgroundColor">单元格背景</param> /// <param name="ha">垂直对齐方式</param> /// <param name="va">垂直对齐方式</param> /// <returns></returns> public static ICellStyle GetCellStyle(HSSFWorkbook hssfworkbook, HSSFColor fillBackgroundColor, HorizontalAlignment ha, VerticalAlignment va) { ICellStyle cellstyle = hssfworkbook.CreateCellStyle(); cellstyle.Alignment = ha; cellstyle.VerticalAlignment = va; if (fillBackgroundColor != null) { cellstyle.FillBackgroundColor = fillBackgroundColor.GetIndex(); } return cellstyle; } /// <summary> /// 合并单元格 /// </summary> /// <param name="sheet">要合并单元格所在的sheet</param> /// <param name="rowstart">开始行的索引</param> /// <param name="rowend">结束行的索引</param> /// <param name="colstart">开始列的索引</param> /// <param name="colend">结束列的索引</param> public static void SetCellRangeAddress(ISheet sheet, int rowstart, int rowend, int colstart, int colend) { CellRangeAddress cellRangeAddress = new CellRangeAddress(rowstart, rowend, colstart, colend); sheet.AddMergedRegion(cellRangeAddress); } #endregion /// <summary> /// 将excel中的数据导入到DataTable中 /// </summary> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param> /// <returns>返回的DataTable</returns> 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); 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(0); 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; ICell tempcell = null; 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) { tempcell = row.GetCell(j); if (tempcell != null) //同理，没有数据的单元格都默认是null { switch (tempcell.CellType) { case CellType.Blank: dataRow[j] = ""; break; case CellType.String: dataRow[j] = tempcell.StringCellValue; break; case CellType.Numeric: dataRow[j] = tempcell.NumericCellValue; break; case CellType.Formula: dataRow[j] = tempcell.NumericCellValue; break; default: dataRow[j] = ""; break; } } } data.Rows.Add(dataRow); } } return data; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); throw ex; //return null; } } /// <summary> /// 将excel中的数据导入到DataTable中,增加多个sheet的情况 /// </summary> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param> /// <returns>返回的DataTable</returns> public DataTable ExcelToDataTable(int sheetIndex, 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); sheet = workbook.GetSheetAt(sheetIndex); if (sheet != null) { IRow firstRow = sheet.GetRow(0); 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; ICell tempcell = null; 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) { tempcell = row.GetCell(j); if (tempcell != null) //同理，没有数据的单元格都默认是null { switch (tempcell.CellType) { case CellType.Blank: dataRow[j] = ""; break; case CellType.String: dataRow[j] = tempcell.StringCellValue; break; case CellType.Numeric: dataRow[j] = tempcell.NumericCellValue; break; case CellType.Formula: dataRow[j] = tempcell.NumericCellValue; break; default: dataRow[j] = ""; break; } } } data.Rows.Add(dataRow); } } return data; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); throw ex; } } public DataTable ExcelToDataTable(int sheetIndex, int RowIndex, 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); sheet = workbook.GetSheetAt(sheetIndex); if (sheet != null) { IRow firstRow = sheet.GetRow(RowIndex); 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+ RowIndex; } else { startRow = sheet.FirstRowNum+ RowIndex; } //最后一列的标号 int rowCount = sheet.LastRowNum; ICell tempcell = null; 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) { tempcell = row.GetCell(j); if (tempcell != null) //同理，没有数据的单元格都默认是null { switch (tempcell.CellType) { case CellType.Blank: dataRow[j] = ""; break; case CellType.String: dataRow[j] = tempcell.StringCellValue; break; case CellType.Numeric: dataRow[j] = tempcell.NumericCellValue; break; case CellType.Formula: dataRow[j] = tempcell.NumericCellValue; break; default: dataRow[j] = ""; break; } } } data.Rows.Add(dataRow); } } return data; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); throw ex; } } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (!this.disposed) { if (disposing) { if (fs != null) fs.Close(); } fs = null; disposed = true; } } } }