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using NPOI.HSSF.UserModel;
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using NPOI.SS.UserModel;
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using NPOI.XSSF.UserModel;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Web;
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namespace DSWeb.MvcShipping.Helper
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{
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public static class ExcelHelper
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{
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/// <summary>
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/// 将excel文件内容读取到DataTable数据表中
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/// </summary>
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/// <param name="fileName">文件完整路径名</param>
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/// <param name="sheetName">指定读取excel工作薄sheet的名称</param>
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/// <param name="isFirstRowColumn">第一行是否是DataTable的列名：true=是，false=否</param>
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/// <returns>DataTable数据表</returns>
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public static DataTable ReadExcelToDataTable(string fileName, out string strMsg, string sheetName = null, bool isFirstRowColumn = true)
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{
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strMsg = "";
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//定义要返回的datatable对象
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DataTable data = new DataTable();
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//excel工作表
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NPOI.SS.UserModel.ISheet sheet = null;
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//数据开始行(排除标题行)
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int startRow = 0;
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try
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{
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if (!File.Exists(fileName))
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{
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return null;
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}
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//根据指定路径读取文件
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FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
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//根据文件流创建excel数据结构
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NPOI.SS.UserModel.IWorkbook workbook = NPOI.SS.UserModel.WorkbookFactory.Create(fs);
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//IWorkbook workbook = new HSSFWorkbook(fs);
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//如果有指定工作表名称
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if (!string.IsNullOrEmpty(sheetName))
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{
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sheet = workbook.GetSheet(sheetName);
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//如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
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if (sheet == null)
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{
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sheet = workbook.GetSheetAt(0);
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}
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}
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else
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{
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//如果没有指定的sheetName，则尝试获取第一个sheet
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sheet = workbook.GetSheetAt(0);
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}
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if (sheet != null)
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{
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NPOI.SS.UserModel.IRow firstRow = sheet.GetRow(0);
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//一行最后一个cell的编号 即总的列数
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int cellCount = firstRow.LastCellNum;
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//如果第一行是标题列名
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if (isFirstRowColumn)
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{
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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NPOI.SS.UserModel.ICell cell = firstRow.GetCell(i);
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if (cell != null)
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{
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string cellValue = cell.StringCellValue;
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if (cellValue != null)
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{
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DataColumn column = new DataColumn(cellValue);
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data.Columns.Add(column);
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}
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}
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}
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startRow = sheet.FirstRowNum + 1;
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}
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else
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{
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startRow = sheet.FirstRowNum;
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}
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//最后一列的标号
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int rowCount = sheet.LastRowNum;
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for (int i = startRow; i <= rowCount; ++i)
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{
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NPOI.SS.UserModel.IRow row = sheet.GetRow(i);
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if (row == null) continue; //没有数据的行默认是null
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DataRow dataRow = data.NewRow();
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for (int j = row.FirstCellNum; j < cellCount; ++j)
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{
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if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
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dataRow[j] = row.GetCell(j).ToString();
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}
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data.Rows.Add(dataRow);
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}
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}
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}
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catch (Exception ex)
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{
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strMsg = ex.Message;
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}
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return data;
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}
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public static DateTime GetDateTime(int timestamp)
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{
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//DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
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//使用上面的方式会显示TimeZone已过时
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//DateTime dtStart = TimeZoneInfo.ConvertTime(new DateTime(1970, 1, 1), TimeZoneInfo.Local);
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//long lTime = long.Parse(timestamp + "0000");
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//TimeSpan timeSpan = new TimeSpan(lTime);
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//DateTime targetDt = dtStart.Add(timeSpan).AddHours(8);
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DateTime dtStart = Convert.ToDateTime("1970-01-01");
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DateTime targetDt = dtStart.AddDays(timestamp-1);
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return targetDt;
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}
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/// <summary>
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/// 将文件流读取到DataTable数据表中
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/// </summary>
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/// <param name="fileStream">文件流</param>
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/// <param name="sheetName">指定读取excel工作薄sheet的名称</param>
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/// <param name="isFirstRowColumn">第一行是否是DataTable的列名：true=是，false=否</param>
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/// <returns>DataTable数据表</returns>
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public static DataTable ReadStreamToDataTable(Stream fileStream, out string strMsg, string sheetName = null, bool isFirstRowColumn = true,int headrow=0)
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{
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strMsg = "";
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//定义要返回的datatable对象
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DataTable data = new DataTable();
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//excel工作表
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NPOI.SS.UserModel.ISheet sheet = null;
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//数据开始行(排除标题行)
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int startRow = 0;
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try
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{
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//根据文件流创建excel数据结构,NPOI的工厂类WorkbookFactory会自动识别excel版本，创建出不同的excel数据结构
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NPOI.SS.UserModel.IWorkbook workbook = NPOI.SS.UserModel.WorkbookFactory.Create(fileStream);
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//如果有指定工作表名称
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if (!string.IsNullOrEmpty(sheetName))
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{
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sheet = workbook.GetSheet(sheetName);
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//如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
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if (sheet == null)
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{
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sheet = workbook.GetSheetAt(0);
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}
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}
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else
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{
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//如果没有指定的sheetName，则尝试获取第一个sheet
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sheet = workbook.GetSheetAt(0);
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}
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if (sheet != null)
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{
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NPOI.SS.UserModel.IRow firstRow = sheet.GetRow(headrow);
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//一行最后一个cell的编号 即总的列数
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int cellCount = firstRow.LastCellNum;
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//如果第一行是标题列名
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if (isFirstRowColumn)
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{
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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NPOI.SS.UserModel.ICell cell = firstRow.GetCell(i);
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if (cell != null)
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{
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string cellValue = cell.StringCellValue;
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if (cellValue != null)
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{
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DataColumn column = new DataColumn(cellValue);
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data.Columns.Add(column);
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}
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}
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}
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startRow = sheet.FirstRowNum + 1;
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}
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else
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{
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startRow = sheet.FirstRowNum;
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}
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//最后一列的标号
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int rowCount = sheet.LastRowNum;
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for (int i = startRow; i <= rowCount; ++i)
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{
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NPOI.SS.UserModel.IRow row = sheet.GetRow(i);
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if (row == null || row.FirstCellNum < 0) continue; //没有数据的行默认是null
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DataRow dataRow = data.NewRow();
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for (int j = row.FirstCellNum; j < cellCount; ++j)
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{
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//同理，没有数据的单元格都默认是null
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NPOI.SS.UserModel.ICell cell = row.GetCell(j);
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if (cell != null)
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{
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if (cell.CellType == NPOI.SS.UserModel.CellType.Numeric)
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{
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//判断是否日期类型
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if (NPOI.SS.UserModel.DateUtil.IsCellDateFormatted(cell))
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{
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try
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{
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dataRow[j] = row.GetCell(j).DateCellValue;
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}
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catch
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{
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dataRow[j] = GetDateTime((int)row.GetCell(j).NumericCellValue);
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//strMsg = row.GetCell(j).NumericCellValue.ToString();
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}
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}
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else
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{
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dataRow[j] = row.GetCell(j).ToString().Trim();
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}
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}
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else
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{
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dataRow[j] = row.GetCell(j).ToString().Trim();
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}
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}
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}
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data.Rows.Add(dataRow);
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}
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}
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}
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catch (Exception ex)
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{
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strMsg = ex.Message;
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}
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return data;
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}
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/// <summary>
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/// 将Excel单表转为Datatable
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/// </summary>
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/// <param name="stream"></param>
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/// <param name="fileType"></param>
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/// <param name="strMsg"></param>
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/// <param name="sheetName"></param>
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/// <returns></returns>
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public static DataTable ExcelToDatatable(Stream stream, string fileType, out string strMsg, string sheetName = null,int startrow=0)
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{
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strMsg = "";
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DataTable dt = new DataTable();
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ISheet sheet = null;
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IWorkbook workbook = null;
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try
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{
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#region 判断excel版本
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//2007以上版本excel
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if (fileType == ".xlsx")
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{
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stream.Seek(0, SeekOrigin.Begin);
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// workbook = new XSSFWorkbook(stream);
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workbook = NPOI.SS.UserModel.WorkbookFactory.Create(stream);
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}
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//2007以下版本excel
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else if (fileType == ".xls")
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{
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workbook = new HSSFWorkbook(stream);
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}
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else
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{
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throw new Exception("传入的不是Excel文件！");
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}
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#endregion
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if (!string.IsNullOrEmpty(sheetName))
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{
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sheet = workbook.GetSheet(sheetName);
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if (sheet == null)
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{
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sheet = workbook.GetSheetAt(0);
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}
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}
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else
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{
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sheet = workbook.GetSheetAt(0);
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}
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if (sheet != null)
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{
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IRow firstRow = sheet.GetRow(startrow);
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int cellCount = firstRow.LastCellNum;
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for (int i = firstRow.FirstCellNum; i < cellCount; i++)
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{
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ICell cell = firstRow.GetCell(i);
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if (cell != null)
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{
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string cellValue = cell.StringCellValue.Trim();
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if (!string.IsNullOrEmpty(cellValue))
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{
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DataColumn dataColumn = new DataColumn(cellValue);
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dt.Columns.Add(dataColumn);
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}
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}
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}
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DataRow dataRow = null;
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//遍历行
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for (int j = sheet.FirstRowNum + 1; j <= sheet.LastRowNum; j++)
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{
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IRow row = sheet.GetRow(j);
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dataRow = dt.NewRow();
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if (row == null || row.FirstCellNum < 0)
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{
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continue;
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}
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//遍历列
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var isadd =false;
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for (int i = row.FirstCellNum; i < cellCount; i++)
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{
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ICell cellData = row.GetCell(i);
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if (cellData != null)
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{
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if (cellData.CellType == NPOI.SS.UserModel.CellType.Numeric)
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{
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//判断是否日期类型
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if (NPOI.SS.UserModel.DateUtil.IsCellDateFormatted(cellData))
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{
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try
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{
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dataRow[i] = cellData.DateCellValue;
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}
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catch
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{
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try
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{
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dataRow[i] = GetDateTime((int)cellData.NumericCellValue);
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}
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catch {
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dataRow[i] = "";
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}
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//strMsg = row.GetCell(j).NumericCellValue.ToString();
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}
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}
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else
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{
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try
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{
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dataRow[i] = cellData.NumericCellValue;
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}
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catch
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{
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try
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{
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dataRow[i] = cellData.StringCellValue;
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}
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catch
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{
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dataRow[i] = "";
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}
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}
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}
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}
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else
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{
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try
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{
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dataRow[i] = cellData.StringCellValue;
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}
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catch
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{
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try
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{
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dataRow[i] = cellData.NumericCellValue;
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}
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catch
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{
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dataRow[i] = "";
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}
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}
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}
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//判断是否为数字型，必须加这个判断不然下面的日期判断会异常
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//if (cellData.CellType == CellType.Numeric)
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//{
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// try
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// {
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// dataRow[j] = row.GetCell(j).DateCellValue;
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// }
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// catch
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// {
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// dataRow[j] = GetDateTime((int)row.GetCell(j).NumericCellValue);
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// //strMsg = row.GetCell(j).NumericCellValue.ToString();
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// }
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//} else if (cellData.CellType == CellType.Formula)
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//{
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// try
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// {
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// dataRow[i] = cellData.StringCellValue;
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// }
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// catch {
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// dataRow[i] = cellData.NumericCellValue;
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// }
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//}
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//else
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//{
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// dataRow[i] = cellData.ToString().Trim();
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//}
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// dt.Rows.Add(dataRow);
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isadd = true;
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}
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else
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{
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dataRow[i] ="";
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}
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}
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if (isadd) dt.Rows.Add(dataRow);
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}
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}
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else
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{
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throw new Exception("没有获取到Excel中的数据表！");
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}
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}
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catch (Exception ex)
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{
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stream.Position = 0; // 增加这句
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workbook = new HSSFWorkbook(stream);
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strMsg = ex.Message;
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}
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return dt;
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}
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}
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} |