Question

我到处寻找我的问题的答案，但我似乎无法弄明白。我尝试使用excellibrary在Create Excel (.XLS and .XLSX) file from C#中描述的方法，并创建了excel文件，但数据已完全销毁且无法恢复。在asp.net应用程序中将数据从mysql导出到excel的最佳方法是什么？

DataSet ds = new DataSet("New_Dataset");
        DataTable dt = new DataTable("New_DataTable");

        ds.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
        dt.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;

        MySqlConnection con = new MySqlConnection(GetConnectionString());
        con.Open();

        string sql = "SELECT * FROM reportdata WHERE TakenDate =?Date";
        MySqlCommand cmd = new MySqlCommand(sql, con);
        MySqlDataAdapter adapt = new MySqlDataAdapter();

        MySqlParameter[] param = new MySqlParameter[1];
        param[0] =new MySqlParameter("?Date", MySqlDbType.VarChar, 10);
        param[0].Value = txtStartDate.Text;

        for (int i = 0; i < param.Length; i++)
        {
            cmd.Parameters.Add(param[i]);
        }

        adapt.SelectCommand = cmd;
        adapt.Fill(dt);
        con.Close();

        ds.Tables.Add(dt);

        string strDay = DateTime.Now.DayOfWeek.ToString();
        string day = DateTime.Now.Day.ToString();
        string month = DateTime.Now.Month.ToString();
        string year = DateTime.Now.Year.ToString();

        ExcelLibrary.DataSetHelper.CreateWorkbook(@"G:\Reports\Report " + strDay + " " + month + "-" + day + "-" + year + ".xls", ds);

Answer 1

考虑使用NPOI Library。我发现它非常容易使用，并利用它来制作quick Excel spreadsheet dump from GridView results。我相信你可以用类似的方式应用技术。我的代码的核心就像这样简单：

DocInfo = PropertySetFactory.CreateDocumentSummaryInformation();
DocInfo.Company = "Dillie-O Digital";
Workbook.DocumentSummaryInformation = DocInfo;

SummaryInfo = PropertySetFactory.CreateSummaryInformation();
SummaryInfo.Subject = "Soup to Nuts GridView Export Example";
Workbook.SummaryInformation = SummaryInfo;

DataSheet = Workbook.CreateSheet("Employees");

for(int i = 0; i <= GridData.Rows.Count - 1; i++)
{
   CurrRow = DataSheet.CreateRow(i);

   for(int j = 0; j <= GridData.Rows[i].Cells.Count - 1; j++)
   {
      if(!IgnoreColumns.Contains(j))
      {
         CurrCell = CurrRow.CreateCell(i);
         CurrCell.SetCellValue(GridData.Rows[i].Cells[j].Text);
      }
   }
}

ResultStream = new FileStream(EndPath, FileMode.Create);
Workbook.Write(ResultStream);
ResultStream.Close();

Answer 2

我发现GemBox.Spreadsheet效果很好而且它是免费的！ http://www.gemboxsoftware.com/

以下我的代码使用数据表来填充Excel电子表格：

        // Creating the Excel file with Gembox
        ExcelFile ef = new ExcelFile();
        foreach (DataTable dt1 in ds.Tables)
        {
            ExcelWorksheet ws = ef.Worksheets.Add(dt1.TableName);
            ws.InsertDataTable(dt1, "A1", true);
        }

将mysql查询的结果保存到excel文件的最佳方法是什么？

2 个答案: