C#导入导出Excel数据的两种方法

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using Abp.Extensions;namespace HYZT.Ltxy.International.Ctrip.Exporting{ public class ExcelLib {  public ICtripPolicyExcelImport GetExcel(string filePath)  {   if (filePath.Trim() .IsNullOrEmpty())    throw new Exception("文件名不能为空"); //因为这儿用得是EPPLUS对Excel进行的操作，所以只能操作 //2007以后的版本以后的（即扩展名为.xlsx）   if (!filePath.Trim().EndsWith("xlsx"))    throw new Exception("请使用office Excel 2007版本或2010版本");   else if (filePath.Trim().EndsWith("xlsx"))   {    ICtripPolicyExcelImport res = new CtripPolicyExcelImport(filePath.Trim());    return res;   }   else return null;  } }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace HYZT.Ltxy.International.Ctrip.Exporting{ public interface ICtripPolicyExcelImport {  /// <summary> 打开文件 </summary>   bool Open();   //ExcelVersion Version { get; }  /// <summary> 文件路径 </summary>   string FilePath { get; set; }  /// <summary> 文件是否已经打开 </summary>   bool IfOpen { get; }  /// <summary> 文件包含工作表的数量 </summary>   int SheetCount { get; }  /// <summary> 当前工作表序号 </summary>   int CurrentSheetIndex { get; set; }  /// <summary> 获取当前工作表中行数 </summary>   int GetRowCount();  /// <summary> 获取当前工作表中列数 </summary>   int GetColumnCount();  /// <summary> 获取当前工作表中某一行中单元格的数量 </summary>   /// <param name="Row">行序号</param>   int GetCellCountInRow(int Row);  /// <summary> 获取当前工作表中某一单元格的值（按字符串返回） </summary>   /// <param name="Row">行序号</param>   /// <param name="Col">列序号</param>   string GetCellValue(int Row, int Col);  /// <summary> 关闭文件 </summary>   void Close();  }}

using OfficeOpenXml;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;namespace HYZT.Ltxy.International.Ctrip.Exporting{ public class CtripPolicyExcelImport:ICtripPolicyExcelImport {  public CtripPolicyExcelImport()   { }    public CtripPolicyExcelImport(string path)   { filePath = path; }  private string filePath = "";  private ExcelWorkbook book = null;  private int sheetCount = 0;  private bool ifOpen = false;  private int currentSheetIndex = 0;  private ExcelWorksheet currentSheet = null;  private ExcelPackage ep = null;     public bool Open()   {    try    {     ep = new ExcelPackage(new FileInfo(filePath));          if (ep == null) return false;     book =ep.Workbook;     sheetCount = book.Worksheets.Count;     currentSheetIndex = 0;     currentSheet = book.Worksheets[1];     ifOpen = true;    }    catch (Exception ex)    {     throw new Exception(ex.Message);    }    return true;   }    public void Close()   {    if (!ifOpen || ep == null) return;    ep.Dispose();   }    //public ExcelVersion Version   //{ get { return ExcelVersion.Excel07; } }    public string FilePath   {    get { return filePath; }    set { filePath = value; }   }    public bool IfOpen   { get { return ifOpen; } }    public int SheetCount   { get { return sheetCount; } }    public int CurrentSheetIndex   {    get { return currentSheetIndex; }    set    {     if (value != currentSheetIndex)     {      if (value >= sheetCount)       throw new Exception("工作表序号超出范围");      currentSheetIndex = value;      currentSheet =book.Worksheets[currentSheetIndex+1];     }    }   }    public int GetRowCount()   {    if (currentSheet == null) return 0;    return currentSheet.Dimension.End.Row;   }    public int GetColumnCount()   {    if (currentSheet == null) return 0;    return currentSheet.Dimension.End.Column;   }    public int GetCellCountInRow(int Row)   {    if (currentSheet == null) return 0;    if (Row >= currentSheet.Dimension.End.Row) return 0;    return currentSheet.Dimension.End.Column;   }  //根据行号和列号获取指定单元格的数据  public string GetCellValue(int Row, int Col)   {    if (currentSheet == null) return "";    if (Row >= currentSheet.Dimension.End.Row || Col >= currentSheet.Dimension.End.Column) return "";    object tmpO =currentSheet.GetValue(Row+1, Col+1);    if (tmpO == null) return "";    return tmpO.ToString();   }    }   }

//用于程序是在本地，所以此时的路径是本地电脑的绝对路劲；//当程序发布后此路径应该是服务器上的绝对路径，所以在此之前还要有//一项功能是将本地文件上传到服务器上的指定位置，此时在获取路径即可 public string GetExcelToCtripPolicy(string filePath)  {   ExcelLib lib = new ExcelLib();   if (filePath == null)    return new ReturnResult<bool>(false, "未找到相应文件");   string str= tmp.GetCellValue(i, j);    return str;  }

using Abp.Application.Services;using OfficeOpenXml;using System;using System.Collections.Generic;using System.Data;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;namespace HYZT.Ltxy.International.Ctrip.GetExcelToDataTable{ public class EPPlusHelperAppService:ApplicationService,IEPPlusHelperAppService {  private static string GetString(object obj)  {   try   {    return obj.ToString();   }   catch (Exception ex)   {    return "";   }  }  /// <summary>  ///将指定的Excel的文件转换成DataTable （Excel的第一个sheet）  /// </summary>  /// <param name="fullFielPath">文件的绝对路径</param>  /// <returns></returns>  public DataTable WorksheetToTable(string filePath)  {   try   {    FileInfo existingFile = new FileInfo(filePath);    ExcelPackage package = new ExcelPackage(existingFile);    ExcelWorksheet worksheet = package.Workbook.Worksheets[1];//选定 指定页    return WorksheetToTable(worksheet);   }   catch (Exception)   {    throw;   }  }  /// <summary>  /// 将worksheet转成datatable  /// </summary>  /// <param name="worksheet">待处理的worksheet</param>  /// <returns>返回处理后的datatable</returns>  public static DataTable WorksheetToTable(ExcelWorksheet worksheet)  {   //获取worksheet的行数   int rows = worksheet.Dimension.End.Row;   //获取worksheet的列数   int cols = worksheet.Dimension.End.Column;   DataTable dt = new DataTable(worksheet.Name);   DataRow dr = null;   for (int i = 1; i <= rows; i++)   {    if (i > 1)     dr = dt.Rows.Add();    for (int j = 1; j <= cols; j++)    {     //默认将第一行设置为datatable的标题     if (i == 1)      dt.Columns.Add(GetString(worksheet.Cells[i, j].Value));     //剩下的写入datatable     else      dr[j - 1] = GetString(worksheet.Cells[i, j].Value);    }   }   return dt;  } }}