C#导入Excel、Excel导入、导入.xls 、导入.xlsx、Excel2003版本、Excel2007版本

private void Import()
{  
      //打开excel选择框
      OpenFileDialog frm = new OpenFileDialog();
       frm.Filter = "Excel文件(*.xls,xlsx)|*.xls;*.xlsx";
       if (frm.ShowDialog() == DialogResult.OK)
       {
               
          string excelName = frm.FileName;
          Workbook excel = new Workbook(excelName);
          List<string[]> importyString=GetImportExcelRoute(excel);
        }
}

//循环遍历获取excel的中每行每列的值  
public List<string[]> GetImportExcelRoute(Workbook excel)
        {
            int icount = excel.Worksheets.Count;

            List<string[]> routList = new List<string[]>();
            for (int i = 0; i < icount; i++)
            {
                Worksheet sheet = excel.Worksheets[i];
                Cells cells = sheet.Cells;
                int rowcount = cells.MaxRow;
                int columncount = cells.MaxColumn;

                int routNameColumn = 0;
                int routAttachColumn = 0;
                int routDescColumn = 0;
                int routMesgColumn = 0;

               //获取标题所在的列
                if (rowcount > 0 && columncount > 0)
                {
                    //找到对应的列信息
                    int r0 = 2;
                    for (int c = 0; c <= columncount; c++)
                    {
                        string strVal = cells[r0, c].StringValue.Trim();
                        if (strVal == "备注")
                        {
                            routDescColumn = c;
                            break;
                        }
                    }

                    r0 = 3;
                    for (int c = 0; c <= columncount; c++)
                    {
                        //获取文本框内容
                        string strVal = cells[r0, c].StringValue.Trim();
                        if (strVal == "审批明细事项")
                        {
                            routNameColumn = c;
                        }
                        if (strVal == "细项")
                        {
                            routMesgColumn = c;
                        }
                        if (strVal == "前置条件及工作要求")
                        {
                            routAttachColumn = c;
                        }
                    }
                     //找到对应标题列下面的值
                    if (routNameColumn > 0 && routAttachColumn > 0 && routDescColumn > 0)
                    {//在从对应的列中找到对应的值
                        for (int r = 4; r <= rowcount; r++)
                        {
                            string[] str = new string[6];
                            string strRoutName = "";
                            string strRoutMesg = "";
                            string strRoutAttach = "";
                            string strRoutDesc = "";
                            string strRoutRole = "";
                            string strRoutPro = "";
                            for (int c = 0; c <= columncount; c++)
                            {
                                int mergcolumncount = 0;
                                int mergrowcount = 0;

                                bool ismerged = cells[r, c].IsMerged;//是否合并单元格 
                                if (ismerged)
                                {
                                    Range range = cells[r, c].GetMergedRange();

                                    if (range != null)
                                    {
                                        mergcolumncount = range.ColumnCount;
                                        mergrowcount = range.RowCount;
                                    }
                                }
                                //获取文本框内容
                                string strVal = "";
                                strVal = cells[r, c].StringValue.Trim();
                                if (c == routNameColumn)
                                {
                                    strRoutName = strVal;
                                    if (mergrowcount > 1 && string.IsNullOrEmpty(strRoutName))
                                    {
                                        strRoutName = GetRoutName(routList, 0);
                                    }
                                }
                                if (c == routMesgColumn)
                                {
                                    strRoutMesg = strVal;
                                    if (mergrowcount > 1 && string.IsNullOrEmpty(strRoutMesg))
                                    {
                                        strRoutMesg = GetRoutName(routList, 1);
                                    }
                                }
                                if (c == routAttachColumn)
                                {
                                    strRoutAttach = strVal;
                                }
                                if (c == routDescColumn)
                                {
                                    strRoutDesc = strVal;
                                }

                           }
                   }
 }

  private string GetRoutName(List<string[]> routList, int index)
        {
            if (routList == null)
                return "";
            if (routList.Count == 0)
                return "";
            return routList[routList.Count - 1][index];
        }

可以看到导入是比较简单的，就是循环读取每行每列的值，可以看到文中有不少Cells这个属性，这个需要用到第三方的插件：using Aspose.Cells;需要在网上下载一个 Aspose.Cells的dll.

二、导出，就是将数据组合好后导成excel格式：

private void Export()
{
             SaveFileDialog frm = new SaveFileDialog();
                frm.Filter = "Excel文件(*.xls,xlsx)|*.xls;*.xlsx";
                frm.FileName = flowName + ".xlsx";
                if (frm.ShowDialog() == DialogResult.OK)
                {
                    string strpath = frm.FileName;
                    Workbook workbook = null;
                   string strpath = _exportFlowRoutExcelPath;
                   if (File.Exists(strpath))
                   {
                      workbook = new Workbook(strpath);
                    }
                    else
                    {
                       workbook = new Workbook();
                   }
                   Worksheet sheet = workbook.Worksheets[0]; //工作表
                   Cells cells = sheet.Cells;//单元格
                   string str="";//获取要导出的数据
                  
                   
                      try
                      {                 
                         RoutExportToExcel(workbook,cells,str);
                                    
 
                            MessageBox.Show("导出成功！");
                        }
                         catch                        
                          {
                            MessageBox.Show("导出失败！");
                        }
                    }
                }
             }

 public void RoutExportToExcel(Workbook workbook, Cells cells,string str)
        {
           分别得到行和列
            int routCount =0;//;
            int rowcount = 4 + routCount;
            int columnCount = 25;
            for (int i = 0; i < rowcount; i++)
            {
                Style style = SettingCellStyle(workbook, cells);
                if (i == 0)
                {
                    style.Font.Color = Color.Red;
                    style.Font.Size = 16;
                    cells.Merge(0, 0, 1, columnCount);//合并单元格
                    cells[i, 0].PutValue("综合管线决策授权体系事项");//填写内容
                    cells[0, 0].SetStyle(style);//给单元格关联样式
                    cells.SetRowHeight(0, 38);//设置行高
                    cells.SetColumnWidth(1, 20);//设置列宽
                }
                if (i > 0)
                {
                    string routeName = "";
                    string routeNote = "";
                    string routeCondition = "";
                    string guid = "";
                    if (i > 3)
                    {
                        cells.SetRowHeight(i, 42);//设置行高
                        JsonObject routJsonObj = routeJsonArray[i - 4] as JsonObject;
                        routeName = routJsonObj["routName"] == null ? "" : routJsonObj["routName"].ToString();
                        routeNote = routJsonObj["note"] == null ? "" : routJsonObj["note"].ToString();
                        routeCondition = routJsonObj["condition"] == null ? "" : routJsonObj["condition"].ToString();
                        guid = routJsonObj["guid"] == null ? "" : routJsonObj["guid"].ToString();
                    }
                    for (int j = 0; j < columnCount; j++)
                    {
                        cells[i, j].SetStyle(style);//给单元格关联样式
                        //填充行
                        if (i > 3)
                        {
                            if (j == 0)//序号
                            {
                                cells[i, j].PutValue(i - 3);//填写内容
                            }
                            else if (j == 4 || j == 5 || j == 24)//审批明细事项 细项 备注
                            {
                                FillExcelRoutProperty(i,j,style,cells,routeName,routeNote,routeCondition);
                            }
                            else if (j == 2 || j == 3 || j == 6 || j == 7 || j == 8 || j == 10 || j == 11 || j == 12 || j == 13)//类别、分类、层级或板块、地区、管线、前置条件责任部门及责任人、审核校对验收责任部门及责任人、具体审核校对验收要求、发起人
                            {
                                FillExcelRoutExtProperty(i, j, guid, style, cells,routExtPropertyJsonArray);
                            }
                            else if (j >= 14 && j <= 23)//路由角色变量（从审批人1到终审人）
                            {
                                FillExcelRoutRoleVal(i,j,guid,style,cells,routRoleValjsonArray);
                            }
                            else if (j == 9)//前置条件及工作要求
                            {
                                FillExcelRoutPreConditon(i,j,guid,style,cells,routPreConditonJsonArray);
                            }
                        }
                        else
                        {
                           SettingCellStyleAndLine(cells, i, j);//设置excel的标题行和列
                        }
                    }
                }
            }
        }

  /// <summary>
        /// 设置单元格样式及线条
        /// </summary>
        /// <param name="cells"></param>
        /// <param name="i"></param>
        /// <param name="j"></param>
        public void SettingCellStyleAndLine(Cells cells, int i, int j)
        {
            if (i == 1)
            {
                if (j == 0)
                {
                    cells.Merge(1, j, 3, 1);//合并单元格
                    cells[i, j].PutValue("序号");//填写内容
                    cells.SetColumnWidth(j, 5);//设置列宽
                }
                if (j == 1)
                {
                    cells.Merge(1, j, 3, 1);//合并单元格
                    cells.SetColumnWidth(j, 5);//设置列宽
                }
           }
 }

 /// <summary>
        /// 设置单元格的样式
        /// </summary>
        /// <param name="workbook"></param>
        /// <param name="cells"></param>
        /// <returns></returns>
        public Style SettingCellStyle(Workbook workbook, Cells cells)
        {
            Style style = workbook.Styles[workbook.Styles.Add()];//新增样式
            style.HorizontalAlignment = TextAlignmentType.Center;//文字居中
            style.Font.Name = "宋体";//文字字体
            style.Font.Size = 10;//文字大小
            style.IsLocked = false;//单元格解锁
            style.Font.IsBold = false;//粗体
            style.ForegroundColor = Color.FromArgb(255, 255, 255);//设置背景色
            style.Pattern = BackgroundType.Solid; //设置背景样式
            style.IsTextWrapped = true;//单元格内容自动换行
            style.Borders[BorderType.LeftBorder].LineStyle = CellBorderType.Thin; //应用边界线 左边界线
            style.Borders[BorderType.RightBorder].LineStyle = CellBorderType.Thin; //应用边界线 右边界线
            style.Borders[BorderType.TopBorder].LineStyle = CellBorderType.Thin; //应用边界线 上边界线
            style.Borders[BorderType.BottomBorder].LineStyle = CellBorderType.Thin; //应用边界线 下边界线
            return style;
        }