public class NPOIExcel { public const string pattern = @"^\d+(\.\d+)?$";//判断是否是数字 public static void CreateFile(string filePath, string sheetName) { if (!File.Exists(filePath)) { //文件不存在 创建新文件写入 if (filePath.Contains(".xlsx") || filePath.Contains(".ett") || filePath.Contains(".xlsm")) { XSSFWorkbook workbook = new XSSFWorkbook(); workbook.CreateSheet(sheetName); FileStream fs = new FileStream(filePath, FileMode.Create); workbook.Write(fs); fs.Close(); } else if (filePath.Contains(".xls") || filePath.Contains(".et")) { HSSFWorkbook workbook = new HSSFWorkbook(); workbook.CreateSheet(sheetName); FileStream fs = new FileStream(filePath, FileMode.Create); workbook.Write(fs); fs.Close(); } } } /// <summary> /// 把DataTable的数据写入到指定的excel文件中 /// </summary> /// <param name="TargetFileNamePath">目标文件excel的路径</param> /// <param name="sourceData">要写入的数据</param> /// <param name="sheetName">excel表中的sheet的名称，可以根据情况自己起</param> /// <param name="IsWriteColumnName">是否写入DataTable的列名称</param> /// <returns>返回写入的行数</returns> public static int DataTableToExcel(string TargetFileNamePath, System.Data.DataTable sourceData, string TemplateSheetName, string sheetName, bool IsWriteColumnName, bool Overwrite, string startCell, Dictionary<string, object> ConvertColumnTypes = null) { bool status = false; //数据验证 if (!File.Exists(TargetFileNamePath)) { //excel文件的路径不存在 throw new ArgumentException(ConfigStringHelper.ExcelError_NotArgumentExceptionFilePath); } FileStream fs = new FileStream(TargetFileNamePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);//读取流 ////根据Excel文件的后缀名创建对应的workbook IWorkbook workbook = null; if (TargetFileNamePath.IndexOf(".xlsx") > 0 || TargetFileNamePath.IndexOf(".ett") > 0 || TargetFileNamePath.IndexOf(".xlsm") > 0) { //2007版本的excel workbook = new XSSFWorkbook(fs); } else if (TargetFileNamePath.IndexOf(".xls") > 0 || TargetFileNamePath.IndexOf(".et") > 0) //2003版本的excel { workbook = new HSSFWorkbook(fs); } else { return -1; //都不匹配或者传入的文件根本就不是excel文件，直接返回 } ISheet sheet = workbook.GetSheetAt(0);//获取工作表 int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 //excel表的sheet名 //ISheet sheet = null; if (!string.IsNullOrEmpty(TemplateSheetName)) { int idex = workbook.GetSheetIndex(TemplateSheetName); if (string.IsNullOrEmpty(sheetName)) { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheetTemplate); } //修改sheet名字 workbook.SetSheetName(idex, sheetName); } for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); //获取sheet的索引 } if (SheetName.Contains(sheetName.ToLower()) && Overwrite == false) { sheet = workbook.GetSheet(sheetName); status = false; } else if (SheetName.Contains(sheetName.ToLower()) && Overwrite == true) { workbook.RemoveSheetAt(workbook.GetSheetIndex(sheetName)); sheet = workbook.CreateSheet(sheetName); status = true; } if (!SheetName.Contains(sheetName.ToLower())) { sheet = workbook.CreateSheet(sheetName); } if (sheet == null) return -1; //无法创建sheet，则直接返回 //写入Excel的行数 int WriteRowCount = 0; int colunmIndex = 0; if (!string.IsNullOrEmpty(startCell)) { CellRangeAddress cellRangeAddress = CellRangeAddress.ValueOf(startCell); WriteRowCount = cellRangeAddress.FirstRow; colunmIndex = cellRangeAddress.FirstColumn; } //这里获取源数据的总行和列 var SourceRows = sourceData.Rows.Count;//行 var SourceColumns = sourceData.Columns.Count;//列 if (IsWriteColumnName == false) { IRow ColumnNameRow = null; //sheet表创建新的一行,即第一行 if (status == true && string.IsNullOrEmpty(startCell)) { //表示覆盖 ColumnNameRow = sheet.CreateRow(0); } else if (status == false && string.IsNullOrEmpty(startCell)) { //表示不覆盖,此处需要判断范围内是否存在数据 for (var i = WriteRowCount; i < SourceRows + WriteRowCount; i++) { IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } for (var j = colunmIndex; j < SourceColumns + colunmIndex; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_WriteFailure); } } } ColumnNameRow = sheet.CreateRow(0); } if (!string.IsNullOrEmpty(startCell) && status == false) { //表示不覆盖，从指定的位置处写入,需要判断指定位置是否有数据 for (var i = WriteRowCount; i < SourceRows + WriteRowCount; i++) { IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } for (var j = colunmIndex; j < SourceColumns + colunmIndex; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_WriteFailure); } var firsLine = row.GetCell(j).ToString(); } } ColumnNameRow = sheet.CreateRow(WriteRowCount); } else if (!string.IsNullOrEmpty(startCell) && status == true) { //表示覆盖，从指定的位置处写入 ColumnNameRow = sheet.CreateRow(WriteRowCount); } //IRow ColumnNameRow = sheet.CreateRow(0); //0下标代表第一行 int ColumnCount = colunmIndex;//开始列 //进行写入DataTable的列名 for (int colunmNameIndex = 0; colunmNameIndex < sourceData.Columns.Count; colunmNameIndex++) { ColumnNameRow.CreateCell(ColumnCount).SetCellValue(sourceData.Columns[colunmNameIndex].ColumnName); ColumnCount++; } WriteRowCount++; } bool endStatus = false; int count = 0; count = (WriteRowCount) + (sheet.LastRowNum); //写入数据 for (int row = 0; row < sourceData.Rows.Count; row++) { IRow newRow = null; //sheet表创建新的一行 if (status == false && string.IsNullOrEmpty(startCell)) { if (endStatus == false) { if (IsWriteColumnName == false) { } else { for (var i = WriteRowCount + 1; i < SourceRows + WriteRowCount + 1; i++) { IRow row_a = sheet.GetRow(i); if (row_a == null) { row_a = sheet.CreateRow(i); } for (var j = colunmIndex; j < SourceColumns + colunmIndex; j++) { ICell cell = row_a.GetCell(j); if (cell == null) { cell = row_a.CreateCell(j); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_WriteFailure); } var firsLine = row_a.GetCell(j).ToString(); } } } } newRow = sheet.CreateRow(WriteRowCount); } else if (status == true && string.IsNullOrEmpty(startCell)) { //表示覆盖 newRow = sheet.CreateRow(WriteRowCount); } if (!string.IsNullOrEmpty(startCell) && status == true) { //表示覆盖，从指定的位置处写入 newRow = sheet.CreateRow(WriteRowCount); } else if (!string.IsNullOrEmpty(startCell) && status == false) { if (endStatus == false) { //表示不覆盖，从指定的位置处写入,需要判断指定位置是否有数据 if (IsWriteColumnName == false) { } else { for (var i = WriteRowCount + 1; i < SourceRows + WriteRowCount + 1; i++) { IRow row_a = sheet.GetRow(i); if (row_a == null) { row_a = sheet.CreateRow(i); } for (var j = colunmIndex; j < SourceColumns + colunmIndex; j++) { ICell cell = row_a.GetCell(j); if (cell == null) { cell = row_a.CreateCell(j); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_WriteFailure); } var firsLine = row_a.GetCell(j).ToString(); } } } } newRow = sheet.CreateRow(WriteRowCount); } int Count = colunmIndex;//开始列 for (int column = 0; column < sourceData.Columns.Count; column++) { string columnName = sourceData.Columns[Convert.ToInt32(column)].ColumnName; string text = sourceData.Rows[row][column].ToString(); Type type = sourceData.Columns[columnName].DataType; if (!string.IsNullOrEmpty(text)) { if (type.Name.Contains("Int32") || type.Name.Contains("Int16") || type.Name.Contains("Int64") || type.Name.Contains("SByte") || type.Name.Contains("Single") || type.Name.Contains("Double") || type.Name.Contains("Decimal")) { newRow.CreateCell(Count).SetCellValue(Convert.ToDouble(text)); } else if (type.Name == "Boolean") { newRow.CreateCell(Count).SetCellValue(Convert.ToBoolean(text)); } else if (type.Name == "DateTime") { newRow.CreateCell(Count).SetCellValue(Convert.ToDateTime(text)); } else if (type.Name == "String") { if (ConvertColumnTypes != null) { if (ConvertColumnTypes.ContainsKey(columnName)) { double d; bool b = double.TryParse(text, out d); if (b) { newRow.CreateCell(Count).SetCellValue(d); } else { newRow.CreateCell(Count).SetCellValue(text); } } else { newRow.CreateCell(Count).SetCellValue(text); } } else { newRow.CreateCell(Count).SetCellValue(text); } } } else { if (ConvertColumnTypes != null) { if (ConvertColumnTypes.ContainsKey(columnName)) { if (ConvertColumnTypes[columnName] != null) { newRow.CreateCell(Count).SetCellValue(Convert.ToDouble(ConvertColumnTypes[columnName])); } } } } Count++; } WriteRowCount++; endStatus = true; } //写入到excel中 using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs1 = new FileStream(TargetFileNamePath, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs1.Write(_data, 0, _data.Length); fs1.Flush(); _data = null; } } return WriteRowCount; } /// <summary> /// 获取excel中的Sheet /// </summary> public static List<string> GetMultipleSheets(string fileName) { List<string> list = new List<string>(); Dictionary<int, string> t = new Dictionary<int, string>(); ISheet sheet = null; IWorkbook workbook = null; FileStream fs = null; 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); int count = workbook.NumberOfSheets; //获取所有SheetName for (int i = 0; i < count; i++) { sheet = workbook.GetSheetAt(i); if (sheet.LastRowNum > 0) { t.Add(i, workbook.GetSheetAt(i).SheetName); list.Add(workbook.GetSheetAt(i).SheetName); } } return list; } catch (Exception ex) { throw new Exception(ex.Message); } finally { if (fs != null) fs.Dispose(); } } /// <summary> /// Excel读取Sheets /// </summary> /// <param name="file">导入路径</param> /// <returns></returns> public static List<string> GetSheetNames(string file) { string fileExt = Path.GetExtension(file).ToLower(); using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read)) { IWorkbook workbook; if (fileExt == ".xlsx" || fileExt == ".ett" || fileExt == ".xlsm") { workbook = new XSSFWorkbook(fs); } else if (fileExt == ".xls" || fileExt == ".et") { workbook = new HSSFWorkbook(fs); } else { workbook = null; } if (workbook == null) { return null; } int sheetCount = workbook.NumberOfSheets;//获取表的数量 List<string> sheetNames = new List<string>();//保存表的名称 for (int i = 0; i < sheetCount; i++) { sheetNames.Add(workbook.GetSheetName(i)); } return sheetNames; } } /* /// <summary> /// Excel读取Sheets /// </summary> /// <param name="file">导入路径</param> /// <returns></returns> public static List<string> GetSheetNames(IWorkbook workbook) { int sheetCount = workbook.NumberOfSheets;//获取表的数量 List<string> sheetNames = new List<string>();//保存表的名称 for (int i = 0; i < sheetCount; i++) { sheetNames.Add(workbook.GetSheetName(i)); } return sheetNames; } */ /// <summary> /// Excel读取Datable /// </summary> /// <param name="file">导入路径</param> /// <returns></returns> public static DataTable ExcelToTable(string file, bool isFirstRowColumn, string sheetName = "") { DataTable dt = new DataTable(); IWorkbook workbook; ISheet sheet = null; string fileExt = Path.GetExtension(file).ToLower(); using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read)) { if (fileExt == ".xlsx" || fileExt == ".ett" || fileExt == ".xlsm") { workbook = new XSSFWorkbook(fs); } else if (fileExt == ".xls" || fileExt == ".et") { workbook = new HSSFWorkbook(fs); } else { workbook = null; } if (workbook == null) { return null; } sheet = workbook.GetSheetAt(0); if (!string.IsNullOrEmpty(sheetName)) { int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); } if (SheetName.Contains(sheetName.ToLower())) { sheet = workbook.GetSheet(sheetName); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } } else { sheet = workbook.GetSheetAt(0); } var rowCount = sheet.LastRowNum + 1;//得到总行数 //z这里遍历得到最大列数，因为存在第一行残缺为空的情况 List<int> array = new List<int>(); for (var i = 0; i < rowCount; i++) { IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } //array.Add(row.Cells.Count);//获取有效列 array.Add(row.LastCellNum);//获取所有列(包含空列以及残缺) } var maxValue = array.Max();//得到最大列数 int Index = 0;//用来判断是否使用列头 List<int> columns = new List<int>(); //创建列头 if (isFirstRowColumn == false) { //第一行不作为DataTable的列名 Index = sheet.FirstRowNum; for (int i = 0; i < maxValue; i++) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); columns.Add(i); } } else { //判断第一行是否是合并单元格 IRow row = sheet.GetRow(0); for (int i = 0; i < row.Cells.Count; i++) { ICell cell = row.GetCell(i); if (cell == null) { cell = row.CreateCell(i); } var cellfirst = cell.IsMergedCell; if (cellfirst == true) { //说明第一行有合并单元格无法作为列,此时需要提醒用户 throw new Exception(ConfigStringHelper.ExcelError_IncludeHeaders); } } Index = sheet.FirstRowNum + 1; //第一行作为DataTable列名 //表头 IRow header = sheet.GetRow(sheet.FirstRowNum); if (header == null) { for (int i = 0; i < maxValue; i++) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); columns.Add(i); } } else { //这里用来检测第一行数据是否合法，可以用来做列头 List<string> lst = new List<string>(); for (int i = 0; i < header.LastCellNum; i++) { object obj = GetValueType(header.GetCell(i)); if (obj == null) { lst.Add("Columns" + i.ToString()); } else { lst.Add(obj.ToString()); } } bool status = lst.GroupBy(n => n).Any(c => c.Count() > 1); if (status == true) { //说明第一行存在重复数据无法作为列头 throw new Exception(ConfigStringHelper.ExcelError_IncludeHeadersData); } for (int i = 0; i < maxValue; i++) { object obj = GetValueType(header.GetCell(i)); if (obj == null || obj.ToString() == string.Empty) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); } else dt.Columns.Add(new DataColumn(obj.ToString())); columns.Add(i); } } } //数据 for (int i = Index; i <= sheet.LastRowNum; i++) { DataRow dr = dt.NewRow(); foreach (int j in columns) { dr[j] = GetValueType(sheet.GetRow(i).GetCell(j)); } dt.Rows.Add(dr); } } return dt; } /// <summary> /// 获取单元格类型 /// </summary> /// <param name="cell"></param> /// <returns></returns> private static object GetValueType(ICell cell) { if (cell == null) return null; switch (cell.CellType) { case CellType.Blank: return null; case CellType.Boolean: return cell.BooleanCellValue; case CellType.Numeric: if (HSSFDateUtil.IsCellDateFormatted(cell))//日期类型 { return Convert.ToDateTime(cell.DateCellValue); } else//其他数字类型 { return Convert.ToDouble(cell.NumericCellValue); } case CellType.String: return cell.StringCellValue; case CellType.Error: XSSFCell xSSFCell = cell as XSSFCell; if (null != xSSFCell) { return xSSFCell.ErrorCellString; } else { return cell.ToString(); } case CellType.Formula: try { return cell.NumericCellValue.ToString(); } catch { try { #region 这种方式处理可以保证100%无错误，但是效率太慢，一个文本公式读取需要3秒 //IFormulaEvaluator formulaEvaluator; //if (_excelVersion == "2007") //{ // formulaEvaluator = new XSSFFormulaEvaluator(workbook); //} //else //{ // formulaEvaluator = new HSSFFormulaEvaluator(workbook); //} //formulaEvaluator.EvaluateInCell(cell); //var FormulaValue = cell.ToString(); #endregion var FormulaValue = cell.StringCellValue.ToString(); return FormulaValue; } catch { return ""; } } default: return "=" + cell.CellFormula; } } /// <summary> /// 将excel中的数据导入到DataTable中 /// </summary> /// <param name="fileName">文件名</param> /// <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 static DataTable ReadTableFromExcel(string fileName, string sheetName = "", bool isFirstRowColumn = false) { //FileStream fs = null; try { using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; IWorkbook workbook = null; if (fileName.Contains(".xlsx")) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.Contains(".xls")) // 2003版本 workbook = new HSSFWorkbook(fs); if (sheetName != null) { sheet = workbook.GetSheetAt(0); int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i); } if (SheetName.Contains(sheetName)) { sheet = workbook.GetSheet(sheetName); } else { sheet = workbook.GetSheetAt(0); } //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.GetSheet(sheetName); //} } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { IRow firstRow = sheet.GetRow(0); if (firstRow == null) { return data; } 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 = null; 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 { for (int column = 0; column < cellCount; column++) { data.Columns.Add($"Column{column}"); } 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; } } finally { //if (fs != null) //{ // fs.Dispose(); //} } } /// <summary> /// 读取单元格 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="cell">单元格坐标</param> /// <returns>返回的DataTable</returns> public static string ReadCell(string fileName, string sheetName = "", string cell = "") { FileStream fs = null; try { using (fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; IWorkbook workbook = null; if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.Contains(".xls") || fileName.Contains(".et")) // 2003版本 workbook = new HSSFWorkbook(fs); sheet = workbook.GetSheet(sheetName); if (sheet == null) { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } if (sheet != null) { CellReference cf = new CellReference(cell); var irow = sheet.GetRow(cf.Row); if (irow == null) { irow = sheet.CreateRow(cf.Row); ; } try { var cel = irow.GetCell(cf.Col); if (cel == null) { cel = irow.CreateCell(cf.Col); } if (cel != null) { if (cel.CellType == CellType.Formula) { cel.SetCellType(CellType.String); } return cel.ToString(); } } catch { throw new ArgumentException(ConfigStringHelper.ExcelError_CellExist); } } return null; } } finally { if (fs != null) { fs.Dispose(); } } } /// <summary> /// 读取列 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="column">列</param> /// <returns>返回的DataTable</returns> public static string[] ReadColumn(string fileName, string sheetName, string column) { FileStream fs = null; try { using (fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { List<string> resultList = new List<string>(); ISheet sheet = null; IWorkbook workbook = null; if (fileName.Contains(".xlsx")) // 2007版本 { workbook = new XSSFWorkbook(fs); } else { 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) { CellReference cf = new CellReference(column); for (int rownum = sheet.FirstRowNum; rownum <= sheet.LastRowNum; rownum++) { var row = sheet.GetRow(rownum); var cell = row?.GetCell(cf.Col); if (cell != null) { if (cell.CellType == CellType.Formula) { cell.SetCellType(CellType.String); } resultList.Add(cell.ToString()); } } } return resultList.ToArray(); } } finally { if (fs != null) { fs.Dispose(); } } } /// <summary> /// 读取范围 /// </summary> [Obsolete] public static DataTable ReadRange(string fileName, string sheetName, string range, bool includeHeaders = false) { FileStream fs = null; try { using (fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { List<string> resultList = new List<string>(); ISheet sheet = null; IWorkbook workbook = null; if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 { workbook = new XSSFWorkbook(fs); } else { workbook = new HSSFWorkbook(fs); } sheet = workbook.GetSheet(sheetName); if (sheet == null) { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } System.Data.DataTable dt = new System.Data.DataTable(); if (sheet != null) { try { CellRangeAddress cellRangeAddress = CellRangeAddress.ValueOf(range); int firstcolumn = cellRangeAddress.FirstColumn; int lastcolumn = cellRangeAddress.LastColumn; int firstrow = cellRangeAddress.FirstRow; int lastrow = cellRangeAddress.LastRow; if (!range.Contains(":")) { if (lastcolumn == firstcolumn) { IRow headrow = sheet.GetRow(firstrow); lastcolumn = headrow.Cells.Count; } if (lastrow == firstrow) lastrow = sheet.LastRowNum + 1;//得到总行数 } int Column = lastcolumn - firstcolumn; int startRow = firstrow; List<int> columns = new List<int>(); //创建列头 if (includeHeaders) { IRow firstRow = sheet.GetRow(startRow); int cellCount = firstRow.LastCellNum; for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { ICell cell = null; cell = firstRow.GetCell(i); if (cell != null) { string cellValue = cell.StringCellValue; if (cellValue != null) { DataColumn column = new DataColumn(cellValue); dt.Columns.Add(column); columns.Add(i); } } } startRow = firstrow + 1; } else { for (int i = 0; i < Column; i++) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); columns.Add(i); } } //数据 for (var i = startRow; i < lastrow; i++) { DataRow dr = dt.NewRow(); IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } bool merged = false; for (var j = firstcolumn; j < Column + firstcolumn; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } if (cell.IsMergedCell) //检测列的单元格是否合并 { dr[j] = GetValueType(cell); //获取单元格的值 if (string.IsNullOrWhiteSpace(dr[j].ToString()) && j > 0) { if (merged) { dr[j] = dr[j - 1]; } } merged = true; } else { merged = false; var firsLine = row.GetCell(j).ToString(); dr[j - cellRangeAddress.FirstColumn] = GetValueType(row.GetCell(j)); } } dt.Rows.Add(dr); } } catch { throw new ArgumentException(ConfigStringHelper.ExcelError_ErrorRange); } } return dt; } } finally { if (fs != null) { fs.Dispose(); } } } /// <summary> /// 读取范围 /// </summary> public static DataTable ReadRange(string fileName, string sheetName, string range, bool includeHeaders = false, bool isMergeColumn = false, bool isMergeRow = false) { FileStream fs = null; try { using (fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { List<string> resultList = new List<string>(); ISheet sheet = null; IWorkbook workbook = null; if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 { workbook = new XSSFWorkbook(fs); } else { workbook = new HSSFWorkbook(fs); } sheet = workbook.GetSheet(sheetName); if (sheet == null) { throw new ArgumentException("ExcelError_NotSheet"); } System.Data.DataTable dt = new System.Data.DataTable(); if (sheet != null) { try { CellRangeAddress cellRangeAddress = CellRangeAddress.ValueOf(range); int firstcolumn = cellRangeAddress.FirstColumn; int lastcolumn = cellRangeAddress.LastColumn; int firstrow = cellRangeAddress.FirstRow; int lastrow = cellRangeAddress.LastRow; if (!range.Contains(":")) { if (lastcolumn == firstcolumn) { IRow headrow = sheet.GetRow(firstrow); lastcolumn = headrow.Cells.Count; } if (lastrow == firstrow) lastrow = sheet.LastRowNum + 1;//得到总行数 } int Column = lastcolumn - firstcolumn; int startRow = firstrow; List<int> columns = new List<int>(); //创建列头 if (includeHeaders) { IRow firstRow = sheet.GetRow(startRow); int cellCount = firstRow.LastCellNum; for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { ICell cell = null; cell = firstRow.GetCell(i); if (cell != null) { string cellValue = cell.StringCellValue; if (cellValue != null) { DataColumn column = new DataColumn(cellValue); dt.Columns.Add(column); columns.Add(i); } } } startRow = firstrow + 1; } else { for (int i = 0; i < Column; i++) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); columns.Add(i); } } //数据 for (var i = startRow; i < lastrow; i++) { DataRow dr = dt.NewRow(); IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } bool merged = false; for (var j = firstcolumn; j < Column + firstcolumn; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } if (cell.IsMergedCell) //检测列的单元格是否合并 { dr[j - firstcolumn] = GetValueType(cell); //获取单元格的值 if (isMergeColumn) { if (string.IsNullOrWhiteSpace(dr[j - firstcolumn].ToString()) && j - firstcolumn > 0) { if (merged) { dr[j - firstcolumn] = dr[j - firstcolumn - 1]; } } } if (isMergeRow) { if (string.IsNullOrWhiteSpace(dr[j - firstcolumn].ToString()) && i - startRow > 0) { DataRow drRow = dt.Rows[dt.Rows.Count - 1]; dr[j - firstcolumn] = drRow[j - firstcolumn]; } } merged = true; } else { merged = false; var firsLine = row.GetCell(j).ToString(); dr[j - firstcolumn] = GetValueType(row.GetCell(j)); } } dt.Rows.Add(dr); } } catch (Exception ex) { throw new ArgumentException("ExcelError_ErrorRange"); } } return dt; } } finally { if (fs != null) { fs.Dispose(); } } } /// <summary> /// 读取行 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="rowIndex">行号</param> /// <param name="startColumnIndex">列号</param> /// <returns>返回的DataTable</returns> public static string[] ReadRow(string fileName, string sheetName, int rowIndex, int startColumnIndex) { FileStream fs = null; try { using (fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { List<string> resultList = new List<string>(); ISheet sheet = null; IWorkbook workbook = null; if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 { workbook = new XSSFWorkbook(fs); } else { workbook = new HSSFWorkbook(fs); } sheet = workbook.GetSheet(sheetName); if (sheet == null) { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } if (sheet != null) { var row = sheet.GetRow(rowIndex); if (row == null) { row = sheet.CreateRow(rowIndex); } if (row != null) { for (int columnNumber = startColumnIndex - 1; columnNumber < row.LastCellNum; columnNumber++) { var cell = row.GetCell(columnNumber); if (cell == null) { cell = row.CreateCell(columnNumber); } if (cell != null) { if (cell.CellType == CellType.Formula) { cell.SetCellType(CellType.String); } resultList.Add(cell.ToString()); } } } } return resultList.ToArray(); } } finally { if (fs != null) { fs.Dispose(); } } } /// <summary> /// 写入单元格 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="cell">单元格坐标</param> /// <param name="value">写入的数据</param> /// <returns>返回的DataTable</returns> public static void WriteCell(string fileName, string sheetName, string cell, object value) { IWorkbook workbook = null; using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.Contains(".xls") || fileName.Contains(".et")) // 2003版本 workbook = new HSSFWorkbook(fs); ISheet sheet = workbook.GetSheetAt(0); //获取第一个工作表 int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); //获取sheet的索引 } if (SheetName.Contains(sheetName.ToLower())) { sheet = workbook.GetSheet(sheetName); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } CellReference cf = new CellReference(cell); var row = sheet.GetRow(cf.Row); if (row == null) { row = sheet.CreateRow(cf.Row); } try { ICell icell = row.GetCell(cf.Col); if (icell == null) { icell = row.CreateCell(cf.Col); } switch (icell.CellType) { case CellType.Formula: icell.SetCellFormula(value.ToString()); break; case CellType.Blank: case CellType.Numeric: if (value is DateTime) { icell.SetCellValue((DateTime)value); } else if (value is double) { icell.SetCellValue((double)value); } else { double doubleValue; if (double.TryParse(value.ToString(), out doubleValue)) { icell.SetCellValue(doubleValue); } else { icell.SetCellValue(value.ToString()); } } break; case CellType.Boolean: if (value is bool) { icell.SetCellValue((bool)value); } else { bool boolValue; if (bool.TryParse(value.ToString(), out boolValue)) { icell.SetCellValue(boolValue); } else { icell.SetCellValue(value.ToString()); } } break; case CellType.Error: if (value is byte) { icell.SetCellErrorValue((byte)value); } else { byte byteValue; if (byte.TryParse(value.ToString(), out byteValue)) { icell.SetCellErrorValue(byteValue); } else { icell.SetCellValue(value.ToString()); } } break; case CellType.String: default: icell.SetCellValue(value.ToString()); break; } //Regex rx = new Regex(pattern); //bool status = rx.IsMatch(value.ToString()); //if (status == true) //{ // //纯数字 // icell.SetCellValue(Convert.ToDouble(value)); //} //else //{ // icell.SetCellValue(value.ToString()); //} } catch { throw new Exception(ConfigStringHelper.ExcelError_CellExist); } //这一句使用NPOI必须加，如不加在修改完单元格的值后 excel不会自动更新公式的值 sheet.ForceFormulaRecalculation = true; } //写入到excel中 using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs1 = new FileStream(fileName, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs1.Write(_data, 0, _data.Length); fs1.Flush(); _data = null; } } } /// <summary> /// 写入单元格 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="cell">单元格坐标</param> /// <param name="value">写入的数据</param> /// <returns>返回的DataTable</returns> public static void WriteCell(ISheet sheet, string cell, object value) { CellReference cf = new CellReference(cell); var row = sheet.GetRow(cf.Row); if (row == null) { row = sheet.CreateRow(cf.Row); } try { if (value != null) { ICell icell = row.GetCell(cf.Col); if (icell == null) { icell = row.CreateCell(cf.Col); } switch (icell.CellType) { case CellType.Formula: icell.SetCellFormula(value.ToString()); break; case CellType.Numeric: if (value is DateTime) { icell.SetCellValue((DateTime)value); } else if (value is double) { icell.SetCellValue((double)value); } else { double doubleValue; if (double.TryParse(value.ToString(), out doubleValue)) { icell.SetCellValue(doubleValue); } else { icell.SetCellValue(value.ToString()); } } break; case CellType.Boolean: if (value is bool) { icell.SetCellValue((bool)value); } else { bool boolValue; if (bool.TryParse(value.ToString(), out boolValue)) { icell.SetCellValue(boolValue); } else { icell.SetCellValue(value.ToString()); } } break; case CellType.Error: if (value is byte) { icell.SetCellErrorValue((byte)value); } else { byte byteValue; if (byte.TryParse(value.ToString(), out byteValue)) { icell.SetCellErrorValue(byteValue); } else { icell.SetCellValue(value.ToString()); } } break; case CellType.String: default: icell.SetCellValue(value.ToString()); break; } //Regex rx = new Regex(pattern); //bool status = rx.IsMatch(value.ToString()); //if (status == true) //{ // //纯数字 // icell.SetCellValue(Convert.ToDouble(value)); //} //else //{ // icell.SetCellValue(value.ToString()); //} } } catch { throw new Exception(ConfigStringHelper.ExcelError_CellExist); } //这一句使用NPOI必须加，如不加在修改完单元格的值后 excel不会自动更新公式的值 sheet.ForceFormulaRecalculation = true; } /// <summary> /// 写入指定行 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="rowIndex">单元格坐标</param> /// <param name="data">写入的数据</param> /// <returns>返回的DataTable</returns> public static void WriteRow(string fileName, string sheetName, int rowIndex, IEnumerable<object> data, int startColumnIndex, bool isInsertRow = false) { FileStream fs = null; try { IWorkbook workbook = null; ISheet sheet = null; using (fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.Contains(".xls") || fileName.Contains(".et")) // 2003版本 workbook = new HSSFWorkbook(fs); } if (sheetName != null) { sheet = workbook.GetSheet(sheetName); if (sheet == null) { throw new Exception(ConfigStringHelper.ExcelError_NotSheet); } } else { //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); } if (sheet != null) { var row = sheet.GetRow(rowIndex); if (row == null) { row = sheet.CreateRow(rowIndex); } if (row != null) { int columnIndex = startColumnIndex; foreach (var item in data) { if (item != null) { ICell icell = row.CreateCell(columnIndex); if (icell == null) { icell = row.CreateCell(columnIndex); } Regex rx = new Regex(pattern); bool status = rx.IsMatch(item.ToString()); if (status == true) { //纯数字 icell.SetCellValue(Convert.ToDouble(item)); } else { icell.SetCellValue(item.ToString()); } } columnIndex++; } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs1 = new FileStream(fileName, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs1.Write(_data, 0, _data.Length); fs1.Flush(); _data = null; } } } } } finally { if (fs != null) { fs.Dispose(); } } } /// <summary> /// 写入指定列 /// </summary> /// <param name="fileName">文件名</param> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="columnName">单元格坐标</param> /// <param name="ColumnIndex">列索引</param> /// <param name="data">写入的数据</param> /// <param name="StartRowIndex">起始行号 从零开始</param> /// <returns>返回的DataTable</returns> public static void WriteColumn(string fileName, string sheetName, string columnName, int ColumnIndex, IEnumerable<object> data, int StartRowIndex, bool insertColumn = false) { string cell_Value = ""; List<object> inserValues = new List<object>(); foreach (var item in data) { inserValues.Add(item); } IWorkbook workbook = null; using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { try { ISheet sheet = null; if (fileName.Contains(".xlsx") || fileName.Contains(".ett") || fileName.Contains(".xlsm")) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.Contains(".xls") || fileName.Contains(".et")) // 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 { throw new Exception(ConfigStringHelper.ExcelError_NotSheet); } } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { bool status = false; var rowCount = sheet.LastRowNum + 1;//得到总行数 if (!string.IsNullOrEmpty(columnName)) { IRow row = sheet.GetRow(0); if (row == null) { row = sheet.CreateRow(0); } for (var j = 0; j < row.Cells.Count; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } var firsLine = row.GetCell(j).ToString(); if (firsLine == columnName) { if (status == false) { cell_Value = columnName; status = true; ColumnIndex = j; } //记录所在的列，只记录一次如果出现多个同名列只计算第一列 } } } if (string.IsNullOrEmpty(cell_Value) && !string.IsNullOrEmpty(columnName)) { throw new ArgumentNullException(ConfigStringHelper.ExcelError_SheetNotcolumnName); } int targetColumn = StartRowIndex - 1; int k = 0; int Index = 0; if (status == true) { Index = ColumnIndex; } else { Index = ColumnIndex - 1; } for (int rows = 0; rows < inserValues.Count(); rows++) { IRow row = sheet.GetRow(targetColumn); if (row == null) { row = sheet.CreateRow(targetColumn); } ICell cell = row.GetCell(Index); if (cell == null) { cell = row.CreateCell(Index); } Regex rx = new Regex(pattern); bool statued = rx.IsMatch(inserValues[k].ToString()); if (statued == true) { //纯数字 cell.SetCellValue(Convert.ToDouble(inserValues[k])); } else { cell.SetCellValue(inserValues[k].ToString()); } k++; targetColumn++; } } //这一句使用NPOI必须加，如不加在修改完单元格的值后 excel不会自动更新公式的值 sheet.ForceFormulaRecalculation = true; } finally { if (fs != null) { fs.Dispose(); } } } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs.Write(_data, 0, _data.Length); fs.Flush(); _data = null; } } } public static void InsertRow(string FilePath, string sheetName, IEnumerable<object> data, int insertrowIndex, int startColumnIndex) { List<object> inserValues = new List<object>(); foreach (var item in data) { inserValues.Add(item); } IWorkbook workbook = null; //读取流 using (FileStream fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { if (FilePath.IndexOf(".xlsx") > 0 || FilePath.IndexOf(".ett") > 0 || FilePath.IndexOf(".xlsm") > 0) { //2007版本的excel workbook = new XSSFWorkbook(fs); } else if (FilePath.IndexOf(".xls") > 0 || FilePath.IndexOf(".et") > 0) //2003版本的excel { workbook = new HSSFWorkbook(fs); } ISheet sheet = workbook.GetSheetAt(0); //获取第一个工作表 int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); //获取sheet的索引 } if (string.IsNullOrEmpty(sheetName)) { //没有填写默认sheet，则获取第一个sheet sheet = workbook.GetSheetAt(0); } else { if (SheetName.Contains(sheetName.ToLower())) { sheet = workbook.GetSheet(sheetName); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } } //插入行 sheet.ShiftRows(insertrowIndex - 1, sheet.LastRowNum + insertrowIndex - 1, 1, true, true); IRow row = sheet.GetRow(insertrowIndex - 1); if (row == null) { row = sheet.CreateRow(insertrowIndex - 1); } for (var j = 0; j < inserValues.Count; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } if (inserValues[j] != null) { Regex rx = new Regex(pattern); bool status = rx.IsMatch(inserValues[j].ToString()); if (status == true) { //纯数字 cell.SetCellValue(Convert.ToDouble(inserValues[j])); } else { cell.SetCellValue(inserValues[j].ToString()); } } } } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs = new FileStream(FilePath, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs.Write(_data, 0, _data.Length); fs.Flush(); _data = null; } } } //插入空行 private static void InsertRowCount(string FilePath, string sheetName, int rowCount, int insertrowIndex, int startColumnIndex) { IWorkbook workbook = null; //读取流 using (FileStream fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { if (FilePath.IndexOf(".xlsx") > 0 || FilePath.IndexOf(".ett") > 0 || FilePath.IndexOf(".xlsm") > 0) { //2007版本的excel workbook = new XSSFWorkbook(fs); } else if (FilePath.IndexOf(".xls") > 0 || FilePath.IndexOf(".et") > 0) //2003版本的excel { workbook = new HSSFWorkbook(fs); } ISheet sheet = workbook.GetSheetAt(0); //获取第一个工作表 int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); //获取sheet的索引 } if (string.IsNullOrEmpty(sheetName)) { //没有填写默认sheet，则获取第一个sheet sheet = workbook.GetSheetAt(0); } else { if (SheetName.Contains(sheetName.ToLower())) { sheet = workbook.GetSheet(sheetName); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } } //插入行 sheet.ShiftRows(insertrowIndex - 1, sheet.LastRowNum + insertrowIndex - 1, 1, true, true); } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs = new FileStream(FilePath, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs.Write(_data, 0, _data.Length); fs.Flush(); _data = null; } } } //实现在指定列前插入列 /// <summary> /// /// </summary> /// <param name="FilePath">excel路径</param> /// <param name="sheetName">sheet名称</param> /// <param name="data">数据源</param> /// <param name="columnName">指定的内容列名</param> /// <param name="insertColumnIndex">列索引</param> /// <param name="StartRowIndex">从第几行开始</param> public static void InsertColumn(string FilePath, string sheetName, IEnumerable<object> data, string columnName, int insertColumnIndex, int StartRowIndex) { string cell_Value = ""; List<object> inserValues = new List<object>(); foreach (var item in data) { inserValues.Add(item); } IWorkbook workbook = null; //读取流 using (FileStream fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { if (FilePath.IndexOf(".xlsx") > 0 || FilePath.IndexOf(".ett") > 0 || FilePath.IndexOf(".xlsm") > 0) { //2007版本的excel workbook = new XSSFWorkbook(fs); } else if (FilePath.IndexOf(".xls") > 0 || FilePath.IndexOf(".et") > 0) //2003版本的excel { workbook = new HSSFWorkbook(fs); } bool SheetStatus = false; ISheet sheet = workbook.GetSheetAt(0); //获取第一个工作表 int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); //获取sheet的索引 } if (string.IsNullOrEmpty(sheetName)) { //没有填写默认sheet，则获取第一个sheet sheet = workbook.GetSheetAt(0); SheetStatus = true; } else { if (SheetName.Contains(sheetName.ToLower())) { sheet = workbook.GetSheet(sheetName); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } } bool status = false; var rowCount = sheet.LastRowNum + 1;//得到总行数 if (!string.IsNullOrEmpty(columnName)) { IRow row = sheet.GetRow(0); if (row == null) { row = sheet.CreateRow(0); } for (var j = 0; j < row.Cells.Count; j++) { ICell cell = row.GetCell(j); if (cell == null) { cell = row.CreateCell(j); } var firsLine = row.GetCell(j).ToString(); if (firsLine == columnName) { if (status == false) { cell_Value = columnName; status = true; insertColumnIndex = j; } //记录所在的列，只记录一次如果出现多个同名列只计算第一列 } } } if (string.IsNullOrEmpty(cell_Value) && !string.IsNullOrEmpty(columnName)) { throw new ArgumentNullException(ConfigStringHelper.ExcelError_SheetNotcolumnName); } //z这里遍历得到最大列数，因为存在第一行残缺为空的情况 List<int> array = new List<int>(); for (var i = 0; i < rowCount; i++) { IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } //array.Add(row.Cells.Count);//获取有效列 array.Add(row.LastCellNum);//获取所有列 } var maxValue = array.Max();//得到最大列数 //创建列头 System.Data.DataTable dt = new System.Data.DataTable(); List<int> columns = new List<int>(); for (int i = 0; i < maxValue; i++) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); columns.Add(i); } //数据 for (int i = sheet.FirstRowNum; i <= sheet.LastRowNum; i++) { DataRow dr = dt.NewRow(); foreach (int j in columns) { dr[j] = GetValueType(sheet.GetRow(i).GetCell(j)); } dt.Rows.Add(dr); } int Index = 0; if (status == true) { Index = insertColumnIndex; } else { Index = insertColumnIndex - 1; } //在指定的列前插入列 dt.Columns.Add("custom999").SetOrdinal(Index); int J = 0; int StartIndex = StartRowIndex - 1; for (int k = StartIndex; k < inserValues.Count() + StartIndex; k++) { if (dt.Rows.Count + StartIndex <= k) { DataRow dr = dt.NewRow(); dt.Rows.Add(dr); } dt.Rows[k]["custom999"] = inserValues[J]; J++; } //因为使用datatable处理所以要先删除原有sheet，创建新sheet导入数据 if (SheetStatus == true) { //说明是使用默认sheet workbook.RemoveSheetAt(workbook.GetSheetIndex(SheetName[0])); sheet = workbook.CreateSheet(SheetName[0]); } else { workbook.RemoveSheetAt(workbook.GetSheetIndex(sheetName)); sheet = workbook.CreateSheet(sheetName); } int WriteRowCount = 0; //写入数据 for (int row = 0; row < dt.Rows.Count; row++) { IRow newRow; newRow = sheet.CreateRow(WriteRowCount); for (int column = 0; column < dt.Columns.Count; column++) { newRow.CreateCell(column).SetCellValue(dt.Rows[row][column].ToString()); } WriteRowCount++; } } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); using (FileStream fs = new FileStream(FilePath, FileMode.Create, FileAccess.Write)) { byte[] _data = ms.ToArray(); fs.Write(_data, 0, _data.Length); fs.Flush(); _data = null; } } } public static DataTable ReadTable(string FilePath, string sheetName, int startIndex, int endIndex) { DataTable dt = new DataTable(); IWorkbook workbook = null; using (FileStream fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { if (startIndex > 0) { if (startIndex > endIndex) { throw new ArgumentException(ConfigStringHelper.ExcelError_ArgumentExceptionRowJudge); } } else { if (endIndex > 1) { throw new ArgumentException(ConfigStringHelper.ExcelError_ArgumentExceptionRowNotStartIndex); } } if (FilePath.IndexOf(".xlsx") > 0 || FilePath.IndexOf(".ett") > 0 || FilePath.IndexOf(".xlsm") > 0) { //2007版本的excel workbook = new XSSFWorkbook(fs); } else if (FilePath.IndexOf(".xls") > 0 || FilePath.IndexOf(".et") > 0) //2003版本的excel { workbook = new HSSFWorkbook(fs); } ISheet sheet = workbook.GetSheetAt(0);//获取工作表 int SheetCount = workbook.NumberOfSheets;//获取表的数量 string[] SheetName = new string[SheetCount];//保存表的名称 for (int i = 0; i < SheetCount; i++) { SheetName[i] = workbook.GetSheetName(i).ToLower(); //获取sheet的索引 } if (SheetName.Contains(sheetName.ToLower())) { sheet = workbook.GetSheet(sheetName); } else { throw new ArgumentException(ConfigStringHelper.ExcelError_NotSheet); } var rowCount = sheet.LastRowNum + 1;//得到总行数 //z这里遍历得到最大列数，因为存在第一行残缺为空的情况 List<int> array = new List<int>(); for (var i = 0; i < rowCount; i++) { IRow row = sheet.GetRow(i); if (row == null) { row = sheet.CreateRow(i); } array.Add(row.LastCellNum);//获取所有列(包含空列以及残缺) } var maxValue = array.Max();//得到最大列数 int Index = 0; int Endex = 0; List<int> columns = new List<int>(); for (int i = 0; i < maxValue; i++) { dt.Columns.Add(new DataColumn("Columns" + i.ToString())); columns.Add(i); } if (startIndex > 1) { Index = startIndex; } if (endIndex > 1) { Endex = endIndex; } else { Endex = sheet.LastRowNum; } //数据 for (int i = Index; i <= Endex; i++) { DataRow dr = dt.NewRow(); foreach (int j in columns) { dr[j] = GetValueType(sheet.GetRow(i).GetCell(j)); } dt.Rows.Add(dr); } } return dt; } }