protected void Button1_Click(object sender, EventArgs e)
{
string fileName = "ToExcel" + DateTime.Now.ToString("yyyyMMddhhMMss") + ".xls";
string filepath = AppDomain.CurrentDomain.BaseDirectory + "Z_ToExcel\\" + fileName;
string start = startdate.Text;
string end = enddate.Text;
SystemBLL BLL = new SystemBLL();
DataSet ds = BLL.GetDs(start, end);
SaveExcel_Fb1(fileName, ds, this, filepath);
filepath = "http://218.90.162.110:8889//Z_ToExcel//" + fileName;
this.WindowLocation(filepath);
}