该网站前台由asp开发，后台则使用C#编写，使用 Microsoft.Office.Interop.Excel控件处理文件导出功能。目前导出Excel报表功能出现异常，具体表现为文件可正常导出，但导出后的Excel文件打开后发现没有内容。请问各位大侠，如何解决该问题？
我先后尝试使用不同版本的Microsoft.Office.Interop.Excel控件，均无效。拜托各位大侠帮忙看看问题出在哪？不甚感激

    excel导出，最好将需导出的内容与DataTable绑定。可参照～
   public static bool FastExportToExcel(System.Data.DataTable dt, ProgressBar proBar, System.Windows.Forms.Label labPercent)
        {
            System.Windows.Forms.SaveFileDialog saveDia = new SaveFileDialog();
            saveDia.Filter = "Excel|*.xls";
            saveDia.Title = "导出为Excel文件";
            if (!(saveDia.ShowDialog() == System.Windows.Forms.DialogResult.OK
             && !string.Empty.Equals(saveDia.FileName)))
            {
                return false;
            }
            long totalCount = dt.Rows.Count;
            long rowRead = 0;
            float percent = 0;
            string FileName = "";
            FileName = saveDia.FileName;
            FileStream objFileStream;
            StreamWriter objStreamWriter;
            string strLine = "title";
            objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);
            objStreamWriter = new StreamWriter(objFileStream, Encoding.Unicode);

            //objStreamWriter.WriteLine(strLine);//寫入標題
            strLine = "";

            for (int i = 0; i < dt.Columns.Count; i++)
            {
                strLine = strLine + dt.Columns[i].ColumnName.ToString() + "" + Convert.ToChar(9);
            }
            objStreamWriter.WriteLine(strLine);
            strLine = "";

            for (int i = 0; i < dt.Rows.Count; i++)
            {
                //strLine = strLine + (i + 1) + Convert.ToChar(9);//增加序號
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    if (dt.Columns[j].ColumnName.ToLower() == "time" && dt.Rows[i][j] != Convert.DBNull)
                    {
                        string strDateTime = Convert.ToDateTime(dt.Rows[i][j]).ToString("yyyy/MM/dd HH:mm:ss.fff");
                        strLine = strLine + " " + strDateTime + Convert.ToChar(9); //9:tab字符
                    }
                    else
                    {
                        strLine = strLine + dt.Rows[i][j].ToString() + Convert.ToChar(9); //9:tab字符
                    }
                }
                objStreamWriter.WriteLine(strLine);
                strLine = "";

                rowRead++;
                percent = ((float)(100 * rowRead)) / totalCount;
                System.Windows.Forms.Application.DoEvents();
                labPercent.Text = percent + "%"; labPercent.Refresh();//顯示百分比進度
                proBar.Value += 1;
            }
            objStreamWriter.Close();
            objFileStream.Close();

            return true;
        }