OpenXml操作Excel

要使用OpenXml首先要下载最新的Open XML Format SDK 2.0。具体的导入openxml的dll，去网上搜，很多

1.我个人写的XmlHelp类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Data;
using System.Text;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

namespace CreateExcelSpreadsheet
{
  public  class ExcelHelper
    {

        /// <summary>
        /// 获取指定单元格的值
        /// </summary>
        /// <param name="cell">单元格</param>
        /// <param name="stringTablePart">SharedStringTablePart类型</param>
        /// <returns></returns>
        public static string GetValue(Cell cell, SharedStringTablePart stringTablePart)
        {
            string returnStr = string.Empty;
            try
            {
                if (cell.ChildElements.Count == 0)
                    return null;
                returnStr = cell.CellValue.InnerText;
                if ((cell.DataType != null) && (cell.DataType == CellValues.SharedString))
                    returnStr = stringTablePart.SharedStringTable.ChildElements[Int32.Parse(returnStr)].InnerText;
            }
            catch (Exception ex) {
                //returnStr = ex.Message;
                throw ex;
            }
            return returnStr;
        }

       /// <summary>
       /// 获取指定的行
       /// </summary>
       /// <param name="worksheet"></param>
       /// <param name="rowIndex">行号</param>
       /// <returns></returns>
       public static Row GetRow(WorkbookPart workBook,Worksheet worksheet,int rowIndex)
       {
            return worksheet.GetFirstChild<SheetData>().
              Elements<Row>().Where(r => r.RowIndex == rowIndex).First();
       }

      /// <summary>
      /// 根据行，列获取指定的单元格
      /// </summary>
      /// <param name="worksheet"></param>
      /// <param name="rowIndex">行号</param>
      /// <param name="columnName">列名</param>
      /// <returns></returns>
      public static Cell GetCell(WorkbookPart workBook,Worksheet worksheet, int rowIndex, string columnName)
      {
            Row row = GetRow(workBook,worksheet, rowIndex);

            if (row == null)
                return null;

            return row.Elements<Cell>().Where(c => string.Compare
                   (c.CellReference.Value, columnName +
                   rowIndex, true) == 0).First();
        }

      /// <summary>
      /// 给指定的单元格赋值
      /// </summary>
      /// <param name="cell"></param>
      /// <param name="newValue">所要赋值的数据</param>
      public static string SetValue(Cell cell, object newValue)
      {
            string returnStr = string.Empty;
            try
            {
                CellValue v = new CellValue(newValue.ToString());
                cell.CellValue = v;
            }
            catch (Exception ex) {
                //returnStr = ex.Message;
                throw ex;
            }
            return returnStr;
        }

      /// <summary>
      /// 更新指定行，列的单元格的值
      /// </summary>
      /// <param name="workSheet"></param>
      /// <param name="newValue">所要赋值的数据</param>
      /// <param name="rowIndex">行号</param>
      /// <param name="columnName">列名</param>
      public static string SetValue(WorkbookPart workBook, Worksheet workSheet, object newValue, int rowIndex, string columnName)
      {
          string returnStr = string.Empty;
          try{
              Cell cell = GetCell(workBook,workSheet, rowIndex, columnName);
            cell.CellValue = new CellValue(newValue.ToString());
            cell.DataType = new EnumValue<CellValues>(CellValues.Number);
            workSheet.Save();
           }catch(Exception ex){
              //returnStr = ex.Message;
               throw ex;
           }
           return returnStr;
        }

      /// <summary>
      /// 提起Worksheet的指定Row 作为DataTable的列名
      /// </summary>
      /// <param name="dt"></param>
      /// <param name="workSheet"></param>
      /// <param name="row"></param>
      public static string GetDataTableColumn(ref DataTable dt,WorkbookPart workBook,Worksheet worksheet,Row row)
      {
          string returnStr = string.Empty;
          try
          {
              DataColumn dc = new DataColumn();
              // SharedStringTable  sst = workbookPart.SharedStringTablePart.SharedStringTable ;
              foreach (Cell cell in row)
              {
                  string cellValue = GetValue(cell, workBook.SharedStringTablePart);
                  dc = new DataColumn(cellValue);
                  dt.Columns.Add(dc);
              }
          }
          catch (Exception ex) {
              //returnStr = ex.Message;
              throw ex;
          }
          return returnStr;
      }

      /// <summary>
      /// 把Worksheet中的数据一行一行的加进DataTable中
      /// </summary>
      /// <param name="dt"></param>
      /// <param name="worksheet"></param>
      /// <param name="row"></param>
      public static string GetDataTableRow(ref DataTable dt,WorkbookPart workBook,Worksheet worksheet,Row row) {
          string returnStr = string.Empty;
          try
          {
              DataRow dr = dt.NewRow();
              int i = 0;
              foreach (Cell cell in row)
              {
                  string cellValue = GetValue(cell, workBook.SharedStringTablePart);
                  dr[i++] = cellValue;
              }
              dt.Rows.Add(dr);
          }
          catch (Exception ex) {
              //returnStr = ex.Message;
              throw ex;
          }
          return returnStr;
      }

      /// <summary>
      /// 读取Excel的Sheet页到DataTable，默认Sheet的第一行是列名
      /// </summary>
      /// <param name="workSheet"></param>
      /// <returns></returns>
      public static string GetDataTableBySheet(ref DataTable dt,WorkbookPart workBook, Worksheet workSheet)
      {
          string returnStr = string.Empty;
          try
          {
              IEnumerable<Row> rows = workSheet.Descendants<Row>();
              foreach (Row row in rows)
              {
                  if (row.RowIndex == 1)
                  {    //默认Sheet的第一行是列名
                      GetDataTableColumn(ref dt, workBook, workSheet, row);
                  }
                  else
                  {
                      GetDataTableRow(ref dt, workBook, workSheet, row);   //更新除列名（第一行）以外的其他数据
                  }
              }
          }
          catch (Exception ex) {
              //returnStr = ex.Message;
              throw ex;
          }
          return returnStr;
      }

      /// <summary>
      /// 更新Worksheet中与DataTable相同的列
      /// </summary>
      /// <param name="dt">传入的DataTable的值</param>
      /// <param name="workSheet"></param>
      public static string UpdateDataFromDataTable(DataTable dt, WorkbookPart workBook, Worksheet workSheet)
      {
          string returnStr = string.Empty;
          try
          {
              int i = 0;  //workSheet的Row
              int j = 0;  //dt.Rows的Row
              foreach (Row row_ws in workSheet){
                  i++;
                  Cell cell_workSheet = GetCell(workBook,workSheet,i,"ID");
                  string cell_workSheet_value = GetValue(cell_workSheet,workBook.SharedStringTablePart) ;
                  foreach (DataRow row_dt in dt.Rows) {
                      j++;
                      if (cell_workSheet_value == row_dt["ID"].ToString()) {
                          SetValue(workBook,workSheet,row_dt["Name"],i,"Name");
                      }
                  }
              }
          }
          catch (Exception ex) {
              returnStr = ex.Message;
          }
          return returnStr;
      }

    }
}

　　

2.具体应用例子

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 using DocumentFormat.OpenXml;
 using DocumentFormat.OpenXml.Wordprocessing;
 using DocumentFormat.OpenXml.Packaging;
 using DocumentFormat.OpenXml.Spreadsheet;
 using DocumentFormat.OpenXml.Extensions;
 using CreateExcelSpreadsheet;

 namespace ConsoleApplication3
 {
     class Program
     {
         static void Main(string[] args)
         {
             using (SpreadsheetDocument spreedSheet = SpreadsheetDocument.Open(@"F:\test.xlsx", true)) {

                 WorkbookPart workBook = spreedSheet.WorkbookPart;
                 //自动计算
                 spreedSheet.WorkbookPart.Workbook.CalculationProperties.ForceFullCalculation = true;
                 spreedSheet.WorkbookPart.Workbook.CalculationProperties.FullCalculationOnLoad = true;

                 IEnumerable<Sheet> sheetXlsx = spreedSheet.WorkbookPart.Workbook.Descendants<Sheet>().Select(c=>c);
                 )
                 {
                     Console.WriteLine("Sheet页为空");
                 }
                 else {
                     //先去第一个Sheet做测试
                     WorksheetPart worksheetPart = workBook.WorksheetParts.FirstOrDefault();
                    // WorksheetPart worksheetPart = (WorksheetPart)spreedSheet.WorkbookPart.GetPartById(sheetXlsx.First().Id);
                     Worksheet workWheet = worksheetPart.Worksheet;
                     ExcelHelper.SetValue(workWheet, , "C");
                 }
             }
         }

     }
 }

以上代码简单明了，但是有个问题，就是，由于excel需要设置的属性很多，在使用OpenXml的时候，难免会后漏掉设置的属性，这样在用程序修改或者创建

excel后，第一次打开的时候，会弹出如下的消息，excel会自动补全确实的属性，目前我还没找到完美的解决方案，在随后会奉上