/// <summary> /// Datable导出成Excel /// </summary> /// <param name="dt">导出存放文件夹路径</param> /// <param name="Route"></param> /// <param name="file">导出路径(包括文件名与扩展名)</param> public static void TableToExcel(DataTable dt, string Route, string file) { IWorkbook workbook; string fileExt = Path.GetExtension(file).ToLower(); if (fileExt == ".xlsx") { workbook = new XSSFWorkbook(); } else if (fileExt == ".xls") { workbook = new HSSFWorkbook(); } else { workbook = null; } if (workbook == null) { return; } ISheet sheet = string.IsNullOrEmpty(dt.TableName) ? workbook.CreateSheet("Sheet1") : workbook.CreateSheet(dt.TableName); //设置列宽 sheet.SetColumnWidth(0, 15 * 256); sheet.SetColumnWidth(1, 15 * 256); sheet.SetColumnWidth(2, 15 * 256); sheet.SetColumnWidth(3, 15 * 256); sheet.SetColumnWidth(4, 15 * 256); sheet.SetColumnWidth(5, 25 * 256); sheet.SetColumnWidth(6, 25 * 256); sheet.SetColumnWidth(7, 30 * 256); sheet.SetColumnWidth(8, 15 * 256); sheet.SetColumnWidth(9, 15 * 256); sheet.SetColumnWidth(10, 15 * 256); sheet.SetColumnWidth(12, 15 * 256); //表头 IRow row = sheet.CreateRow(0); for (int i = 0; i < dt.Columns.Count - 1; i++) { ICell cell = row.CreateCell(i); cell.SetCellValue(dt.Columns[i].ColumnName); } //数据 for (int i = 0; i < dt.Rows.Count; i++) { IRow row1 = sheet.CreateRow(i + 1); for (int j = 0; j < dt.Columns.Count - 1; j++) { ICell cell = row1.CreateCell(j); cell.SetCellValue(dt.Rows[i][j].ToString()); } } //转为字节数组 MemoryStream stream = new MemoryStream(); workbook.Write(stream); var buf = stream.ToArray(); //如找不到文件夹则创建 if (!Directory.Exists(Route)) { Directory.CreateDirectory(Route); } //保存为Excel文件 using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write)) { fs.Write(buf, 0, buf.Length); fs.Flush(); } //HttpResponseBase response = httpContext.Response; //response.Clear(); //response.Buffer = false; //response.AddHeader("Accept-Ranges", "bytes"); //response.AddHeader("Content-Type", GetContentTypeByFileName(fileName)); //response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(Encoding.UTF8.GetBytes(fileName))); //response.AddHeader("Content-Length", buffer.Length.ToString()); //response.OutputStream.Write(buffer, 0, buffer.Length); //response.Flush(); //response.End(); } /// <summary> /// Excel导入成Datable /// </summary> /// <param name="file">导入路径(包含文件名与扩展名)</param> /// <returns></returns> public static DataTable ExcelToTable(string file) { DataTable dt = new DataTable(); IWorkbook workbook; string fileExt = Path.GetExtension(file).ToLower(); using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read)) { //XSSFWorkbook 适用XLSX格式,HSSFWorkbook 适用XLS格式 if (fileExt == ".xlsx") { workbook = new XSSFWorkbook(fs); } else if (fileExt == ".xls") { workbook = new HSSFWorkbook(fs); } else { workbook = null; } if (workbook == null) { return null; } ISheet sheet = workbook.GetSheetAt(0); //表头 IRow header = sheet.GetRow(sheet.FirstRowNum); List<int> columns = new List<int>(); for (int i = 0; i < header.LastCellNum; 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 = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++) { DataRow dr = dt.NewRow(); bool hasValue = false; foreach (int j in columns) { dr[j] = GetValueType(sheet.GetRow(i).GetCell(j)); if (dr[j] != null && dr[j].ToString() != string.Empty) { hasValue = true; } } if (hasValue) { dt.Rows.Add(dr); } } } return dt; }
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