根据高级查询导出excel

protected void ImageButton7_Click(object sender, ImageClickEventArgs e)

        {

            string D_where = string.Empty;

            if (string.IsNullOrEmpty(txtStart.Value) == false)

            {

                D_where += " and to_char(S_IN_DATE,'yyyy-mm-dd')>='" + txtStart.Value + "'";

            }

            if (string.IsNullOrEmpty(txtEnd.Value) == false)

            {

                D_where += " and to_char(S_IN_DATE,'yyyy-mm-dd')<='" + txtEnd.Value + "'";

            }

            if (DropDownList1.SelectedValue != "0000" && DropDownList1.SelectedValue != "")

            {

                D_where += " and F_SALEOUT_O='" + DropDownList1.Items[DropDownList1.SelectedIndex].Text + "'";

            }

            if (DropDownList2.SelectedValue != "0000" && DropDownList2.SelectedValue != "")

            {

                D_where += " and F_SALEOUT_T='" + DropDownList2.Items[DropDownList2.SelectedIndex].Text + "'";



            }





            string sql = @"select XS_DATE 销售日期,F_ORDERID 服务单号,G_NAME 被保人姓名,G_CARDNO 被保人身份证号,F_ENSURE 被保金额,F_SERVICE 服务费用,MEDICAL_COST 医疗成本,case when (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000)>0 then (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000) else 0 end  合作推广费用小,(1 - (1 / (F_ENSURE / 3000))) * ((F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100))) + 200 合作推广费用大,((1 - (1 / (F_ENSURE / 3000))) * ((F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100))) + 200)-(case when (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000)>0 then (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000) else 0 end) 差价

  FROM ACCEPTANCE A, U_PROFIT U, Y_ORDERS O,MEDICALTYPE M

 WHERE A.U_PROFIT_ID = U.ID AND O.ID = A.ORDER_ID and O.f_saleout_stype=m.medical_id and  S_STUSES in (2) " + D_where + "";

            DataTable dt = DBUtility.DBHelper.GetDataTable(sql);



            string sql2 = @"select  sum(F_ENSURE) a,sum(F_SERVICE) b,sum(case when (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000)>0 then (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000) else 0 end) c,sum((1 - (1 / (F_ENSURE / 3000))) * ((F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100))) + 200) d,sum(((1 - (1 / (F_ENSURE / 3000))) * ((F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100))) + 200)-(case when (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000)>0 then (F_SERVICE * 0.942) - (F_ENSURE * (MEDICAL_COST / 100)) - 400 - ((F_ENSURE * 60) / 3000) else 0 end)) e

  FROM ACCEPTANCE A, U_PROFIT U, Y_ORDERS O,MEDICALTYPE M

 WHERE A.U_PROFIT_ID = U.ID AND O.ID = A.ORDER_ID and O.f_saleout_stype=m.medical_id and  S_STUSES in (2) " + D_where + "";

            DataTable num = DBUtility.DBHelper.GetDataTable(sql2);



            DataRow dr = dt.NewRow();

            dr[dt.Columns.Count - 9] = "合计(￥)：";

            dr[dt.Columns.Count - 6] = num.Rows[0]["a"].ToString();

            dr[dt.Columns.Count - 5] = num.Rows[0]["b"].ToString();

            dr[dt.Columns.Count - 3] = num.Rows[0]["c"].ToString();

            dr[dt.Columns.Count - 2] = num.Rows[0]["d"].ToString();

            dr[dt.Columns.Count - 1] = num.Rows[0]["e"].ToString();

            dt.Rows.Add(dr);



            ExcelImport(dt, @"HZFYTGDZDExl");

           



          

        }

        private StringWriter GetStringWriter(DataTable dt)

        {

            StringWriter sw = new StringWriter();

            //读列名   

            foreach (DataColumn dc in dt.Columns)

                sw.Write(dc.ColumnName + "\t");



            //读列值   

            //重新的一行   

            sw.Write(sw.NewLine);

            if (dt != null)

            {

                foreach (DataRow dr in dt.Rows)

                {

                    for (int i = 0; i < dt.Columns.Count; i++)

                    {

                        sw.Write(dr[i].ToString() + "\t");

                    }

                    sw.Write(sw.NewLine);

                }

            }

            sw.Close();



            return sw;

        }



        protected void ExcelImport(DataTable dt, string ExportFileName)

        {

            StringWriter sw = GetStringWriter(dt);

            //当前编码   

            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");

            //把输出的文件名进行编码   

            string fileName = HttpUtility.UrlEncode(ExportFileName, System.Text.Encoding.UTF8);

            //文件名   

            string str = "attachment;filename=" + fileName + ".xls";

            //  sw.ContentType = "application/vnd.ms-excel";

            //把文件头输出，此文件头激活文件下载框   

            HttpContext.Current.Response.AppendHeader("Content-Disposition", str);//http报头文件   

            HttpContext.Current.Response.ContentType = "application/ms-excel";

            this.Page.EnableViewState = false;



            Response.Write(sw);

            Response.End();

        }

View Code

 

DataTable.NewRow()用来创建一个新的Row，为什么还要加回自己dt.Rows.Add()?

2014-08-27 20:08

既然DataRow类型本身的构造函数是不可public访问的，因此必须得像下面这样来创建一个DataRow:

DataTable dt = new DataTable("t1");

DataRow dr = dt.NewRow();

dt.Rows.Add(dr);