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C# Winform实现导入和导出Excel文件

2019年07月18日  | 移动技术网IT编程  | 我要评论

本文实例为大家分享了winform实现导入导出excel文件的具体代码，供大家参考，具体内容如下

/// <summary>
    /// 导出excel文件
    /// </summary>
    /// /// <param name="dataset"></param>
    /// <param name="datatable">数据集</param>
    /// <param name="isshowexcle">导出后是否打开文件</param>
    /// <returns></returns>
    public static bool datatabletoexcel(string filepath, system.data.datatable datatable, bool isshowexcle)
    {
      //system.data.datatable datatable = dataset.tables[0];
      int rownumber = datatable.rows.count;
      int columnnumber = datatable.columns.count;
      int colindex = 0;
 
      if (rownumber == 0)
      {
        return false;
      }
 
      microsoft.office.interop.excel.application excel = new microsoft.office.interop.excel.application();
      microsoft.office.interop.excel.workbook workbook = excel.workbooks.add(microsoft.office.interop.excel.xlwbatemplate.xlwbatworksheet);
      microsoft.office.interop.excel.worksheet worksheet = (microsoft.office.interop.excel.worksheet)workbook.worksheets[1];
      excel.visible = isshowexcle;
      microsoft.office.interop.excel.range range;
 
 
      foreach (datacolumn col in datatable.columns)
      {
        colindex++;
        excel.cells[1, colindex] = col.columnname;
      }
 
      object[,] objdata = new object[rownumber, columnnumber];
 
      for (int r = 0; r < rownumber; r++)
      {
        for (int c = 0; c < columnnumber; c++)
        {
          objdata[r, c] =datatable.rows[r][c];
        }
      }
 
      range = worksheet.get_range(excel.cells[2, 1], excel.cells[rownumber + 1, columnnumber]);
 
      range.value2 = objdata;
 
      range.numberformatlocal = "@";
 
      worksheet.saveas(filepath, type.missing, type.missing, type.missing, type.missing, type.missing, type.missing, type.missing, type.missing, type.missing);
 
      //excel.quit();
      return true;
    }

读取excel文件数据到datatable

 /// <summary>
    /// 读取excel文件数据到datatable
    /// </summary>
    /// <param name="filepath">excel文件路径</param>
    private void import_excel(string filepath)
    {
      string sqlconn = "provider=microsoft.jet.oledb.4.0;data source=" + filepath + ";extended properties='excel 8.0;hdr=false;imex=1'";
 
      string sql = @"select * from [sheet1$]";
 
      try
      {
        using (oledbconnection conn = new oledbconnection(sqlconn))
        {
          using (oledbdataadapter adapter = new oledbdataadapter(sql, conn))
          {
            system.data.datatable dt = new system.data.datatable();
            adapter.fill(dt);
 
            this.loaddatagridview(dt);
          }
        }
      }
      catch (exception ex)
      {
        messagebox.show("打开文件出错，错误信息：" + ex.message.tostring(), "提示");
      }
    }

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