//btn_export_all_Click
protected void btn_export_all_Click(object sender, EventArgs e)
{
PatientTable pt = new PatientTable();
DateTime beginDate, endDate;
beginDate = DateTime.Now.AddMonths(-1);
endDate = DateTime.Now.AddMonths(1);
beginDate = Convert.ToDateTime(tbox_beginDate.Text);
beginDate = beginDate.AddDays(-1);
endDate = Convert.ToDateTime(tbox_endDate.Text);
endDate = endDate.AddDays(1);
string fileName = System.Configuration.ConfigurationManager.AppSettings["ExportPath"] + "所有数据" + DateTime.Now.ToString("yyyyMMdd") + ".xls";
string result = pt.ExportAll(fileName, beginDate, endDate);
DownloadFile(result, Response, fileName, "所有数据.xls");
}