导出Excel

#region 导出Excel
    /// <summary>
    /// 导出Excel
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btn_GetExcel_Click(object sender, EventArgs e)
    {

        
            System.Data.DataTable dt = GetDataTable();
            
            int rowNumber = dt.Rows.Count;//不包括字段名
            int columnNumber = dt.Columns.Count;
            int colIndex = 0;
            bool isShowExcle = false;
            if (rowNumber == 0)
            {

                return;
            }

            #region NPOI
            //2、创建Excel文件的对象
            NPOI.HSSF.UserModel.HSSFWorkbook excel = new NPOI.HSSF.UserModel.HSSFWorkbook();
            NPOI.SS.UserModel.ICellStyle style = excel.CreateCellStyle();//设置样式
            style.FillForegroundColor = HSSFColor.Yellow.Index;//设置颜色
            style.FillPattern = NPOI.SS.UserModel.FillPattern.SolidForeground;
            style.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; ;//居中
            //设置边框
            style.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
            style.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
            style.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
            style.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;

            NPOI.SS.UserModel.ICellStyle stylered = excel.CreateCellStyle();//设置样式
            stylered.FillForegroundColor = HSSFColor.Red.Index;//设置颜色
            stylered.FillPattern = NPOI.SS.UserModel.FillPattern.SolidForeground;

            NPOI.SS.UserModel.ICellStyle stylegr = excel.CreateCellStyle();//设置样式
            stylegr.FillForegroundColor = HSSFColor.Green.Index;//设置颜色
            stylegr.FillPattern = NPOI.SS.UserModel.FillPattern.SolidForeground;

            //添加一个sheet
            NPOI.SS.UserModel.ISheet sheet = excel.CreateSheet("Sheet1");
            //给sheet1添加标题行
            NPOI.SS.UserModel.IRow head = sheet.CreateRow(0);

            head.Height = 30 * 20;    //行高为30
            sheet.SetColumnWidth(0, 15 * 256); //第4列的列宽为13
            head.CreateCell(0).SetCellValue("序号");
            head.CreateCell(1).SetCellValue("车牌号");
            head.CreateCell(2).SetCellValue("所属OEM");
            head.CreateCell(3).SetCellValue("发动机型号");
            head.CreateCell(4).SetCellValue("发动机编号");
            head.CreateCell(5).SetCellValue("发动机型号（采集）");
            head.CreateCell(6).SetCellValue("ESN(采集)");
            head.CreateCell(7).SetCellValue("VIN码(采集)");
            head.CreateCell(8).SetCellValue("信贷状态");
            head.CreateCell(9).SetCellValue("设备状态");
            head.CreateCell(10).SetCellValue("电子围栏设置");
            //为表头添加样式
            head.Cells[0].CellStyle = style;
            head.Cells[1].CellStyle = style;
            head.Cells[2].CellStyle = style;
            head.Cells[3].CellStyle = style;
            head.Cells[4].CellStyle = style;
            head.Cells[5].CellStyle = style;
            head.Cells[6].CellStyle = style;
            head.Cells[7].CellStyle = style;
            head.Cells[8].CellStyle = style;
            head.Cells[9].CellStyle = style;
            head.Cells[10].CellStyle = style;
            //将数据逐步写入sheet1各个行
            int num = 0;
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                int a = i;
                NPOI.SS.UserModel.IRow row = sheet.CreateRow(i + 1);
                row.Height = 20 * 20;    //行高为20
                sheet.SetColumnWidth(i, 15 * 256); //第i列的列宽为15
                row.CreateCell(0).SetCellValue(dt.Rows[i]["Vcl_ID"].ToString());
                row.CreateCell(1).SetCellValue(dt.Rows[i]["Vcl_No"].ToString());
                row.CreateCell(2).SetCellValue(dt.Rows[i]["Organ_Name"].ToString());
                row.CreateCell(3).SetCellValue(dt.Rows[i]["Vcl_EngineType"].ToString());
                row.CreateCell(4).SetCellValue(dt.Rows[i]["Vcl_EngineNo"].ToString());
                row.CreateCell(5).SetCellValue(dt.Rows[i]["MsgTk_EgnMode"].ToString());
                row.CreateCell(6).SetCellValue(dt.Rows[i]["MsgTk_ProductSerialNo"].ToString());
                row.CreateCell(7).SetCellValue(dt.Rows[i]["MsgTk_VINCode"].ToString());
                string strCreditStatus = dt.Rows[i]["CWI_IsEffective"].ToString();
                string Texts;
                if (strCreditStatus == "1")
                Texts = "逾期";
                else
                Texts = "正常";
                row.CreateCell(8).SetCellValue(Texts);
                
                //绑定车辆状态
                string strMsgL_L1Schedule = dt.Rows[i]["MsgLS_L1Schedule"].ToString();
                string strMsgL_L2Schedule = dt.Rows[i]["MsgLS_L2Schedule"].ToString();
                string strMsgL_L3Schedule = dt.Rows[i]["MsgLS_L3Schedule"].ToString();
                string strMsgL_ID = dt.Rows[i]["MsgLS_ID"].ToString();            //锁车设置ID
                string strMsgLR_ID = dt.Rows[i]["MsgLR_ID"].ToString();           //锁车设置回复ID
                string strCLA_MsgLRpt_ID = dt.Rows[i]["CLA_MsgLRpt_ID"].ToString();     //锁车报告ID
                string strMsgL_SysCS_ID = dt.Rows[i]["MsgLS_SysCS_ID"].ToString();      //锁车设置指令状态
                string strSoftEdition = dt.Rows[i]["Tmnl_SoftEdition"].ToString();
                string Text;
                if (string.IsNullOrEmpty(strMsgL_ID) || string.IsNullOrEmpty(strSoftEdition))
                    Text = "未设置";
                else
                {
                    if (!string.IsNullOrEmpty(strMsgL_L1Schedule))
                        Text = "一级锁车";
                    else if (!string.IsNullOrEmpty(strMsgL_L2Schedule))
                        Text = "二级锁车";
                    else if (!string.IsNullOrEmpty(strMsgL_L3Schedule))
                        Text = "三级锁车";
                    else
                        Text = "解车";

                    if (!string.IsNullOrEmpty(strCLA_MsgLRpt_ID))
                        Text += "已执行";
                    else if (!string.IsNullOrEmpty(strMsgLR_ID))
                        Text += "已接收";
                    else
                    {
                        Text += "已发送";
                        if (strMsgL_SysCS_ID == "2")
                            Text += "（送出）";
                        else if (strMsgL_SysCS_ID == "4")
                            Text += "（超时）";
                        else if (strMsgL_SysCS_ID == "5")
                            Text += "（取消）";
                        else if (strMsgL_SysCS_ID == "6")
                           Text += "（未成功）";
                    }
                }
                row.CreateCell(9).SetCellValue(Text);
                string BoundSet;
                string strBoundSet = dt.Rows[i]["BoundSet"].ToString();
                if (string.IsNullOrEmpty(strBoundSet))
                    BoundSet = "设置";
                else if (strBoundSet == "1")
                    BoundSet = "设置";
                else
                    BoundSet = "取消";
                row.CreateCell(10).SetCellValue(BoundSet);
            }

            // 写入到客户端 
            string fileName = DateTime.Now.ToString("yyyy-MM-dd") + "导出数据.xls"; // 文件名称 
            string filePath = Path.Combine(HttpRuntime.AppDomainAppPath, "UploadFiles") + "\\" + fileName;
            // 4.生成文件 
            FileStream file = new FileStream(filePath, FileMode.Create);
            excel.Write(file);
            file.Close();
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
            Response.ContentType = "application/ms-excel";
            Response.WriteFile(filePath);
            Response.Flush();
            Response.End();
            #endregion
        
    }
    #endregion

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