报表页面设计思路

应用情景：

一、简单型

只有一个数据列表，从数据库读取表数据，在程序端构造DataTable，格式化为中文（同时处理合计结果），前台页面绑定（使用中文字段绑定），后台调用NOPI导出到EXCEL；

二、复杂型

在一的基础上增加:

1、存在多个数据列表（例如：汇总、明细）；

2、可按行进行合计；

3、列名可能是动态增加的（例如支付方式：微信、支付宝、现金、刷卡）；

解决方案：

（一）定义页面全局DataTable

    private DataTable dtTicketSumReport = new DataTable();

    protected Dictionary<string, decimal> dcTicketSum = new Dictionary<string, decimal>(); //用作合计

（ 二）初始化字典对象

private void InitDictionary()
{
        this.dcTicketSum.Add("数量", 0);
        this.dcTicketSum.Add("手续费", 0);
        this.dcTicketSum.Add("优惠金额", 0);
        this.dcTicketSum.Add("合计", 0);
        this.dcTicketSum.Add("成本合计", 0);

　　　　 foreach (UserOperatorMoneyPaymentType item in Enum.GetValues(typeof(UserOperatorMoneyPaymentType)))
        {
            this.dcTicketSum.Add(item.ToString(), decimal.Zero); //动态添加字典项；
        }
}

（三）初始化全局Datatable

private void InitGlobalTable()
{

       DataTable dtMoneyDetail = ds.Tables[0]; //从数据库获取数据

        //格式化列名（使用中文，导出时也是使用同一个Table)
        this.dtTicketSumReport.Columns.Add("OperatorId", typeof(int));
         //.....
        this.dtTicketSumReport.Columns.Add("成本", typeof(decimal));        

        dcMoney = new DataColumn("手续费", typeof(decimal)); //增加列
        dcMoney.DefaultValue = "0.00";
        this.dtTicketSumReport.Columns.Add(dcMoney);

        Dictionary<byte, string> dcPaymentType = new Dictionary<byte, string>();
        //根据数据库的实际记录，把要增加的列先添加到字典dcPaymentType中
        foreach (DataRow dr in dtMoneyDetail.Rows)
        {
           byte paymentType = (byte)dr["PaymentType"];
            if (!dcPaymentType.ContainsKey(paymentType))
            {
                string columnName = null;
                UserOperatorMoneyPaymentType paymentTypeEnum;
                if (!Enum.TryParse<UserOperatorMoneyPaymentType>(paymentType.ToString(), out paymentTypeEnum))
                {
                    Response.Write("未定义支付方式" + paymentType.ToString());
                    Response.End();
                }

                columnName = paymentTypeEnum.ToString();
                dcPaymentType.Add(paymentType, columnName);
            }
        }

        foreach (DataRow dr in dtOrderTicketNumSum.Rows)
        {
            //读取列名
            string amountColumnName = dcPaymentType[paymentType];

            //合计：
            Dictionary<string, decimal> dcTicketSum = new Dictionary<string, decimal>();
            this.dcTicketSum["合计"] = this.dcTicketSum["合计"] + realAmount + poundage;
            this.dcTicketSum[amountColumnName] = this.dcTicketSum[amountColumnName] + realAmount;

            DataRow drFind = this.dtTicketSumReport.Rows.Find(new object[] { operatorId, scheduleId });

            //检查是否已经添加过要新增加的列
            if (!this.dtTicketSumReport.Columns.Contains(amountColumnName))
            {
                //增加列
                dcMoney = new DataColumn(amountColumnName, typeof(decimal));
                dcMoney.DefaultValue = "0.00";
                this.dtTicketSumReport.Columns.Add(dcMoney);
            }

            if (drFind == null)
            {
                drFind = this.dtTicketSumReport.NewRow();
                //......
                this.dtTicketSumReport.Rows.Add(drFind);
            }
            else
            {
                drFind["合计"] = (Convert.ToDecimal(drFind["合计"]) + realAmount + poundage).ToString();
            }
        }

        if (this.dtTicketSumReport!= null)
        {
            this.dtTicketSumReport.PrimaryKey = null;
            this.dtTicketSumReport.Columns.Remove("TicketId");
            //去掉不再需要的列（前台页面不用绑定；导出时不用显示）；
        }
}

四、绑定前台页面、

 private void InitControl()
{
        this.InitGlobalTable();

        this.rpTicketSum.DataSource = this.dtTicketSumReport;
        this.rpTicketSum.DataBind();
}　　

五、导出EXCEL

 private void ProcessExport()
    {
        this.InitGlobalTable();
        DateTime beginDate = DateTime.Parse(this.dpBeginDate.Text);
        DateTime endDate = DateTime.Parse(this.dpEndDate.Text);

        DataTable[] dtArr = null;
        string[] dtArrTips = null;

        if (true)
        {
            dtArr = ....
            dtArrTips = new string[] { ........ };
        }
        else
        {
            dtArr = ......
            dtArrTips = new string[] { .......};
        }

        string fileName = (beginDate == endDate ? beginDate.ToString("yyyy-MM-dd") : string.Format("{0}至{1}", beginDate.ToString("yyyy-MM-dd"), endDate.ToString("yyyy-MM-dd"))) + salerName + ".....";
        string excelSubTitle = fileName;

        string[] sumColumnNameArray = new string[] { ....... };

        SSM_EC.Site.NpoiExcel.ExportExcel(dtArr, dtArrTips, fileName, AspxHelper.GetExcelHeader(), excelSubTitle, false, AspxHelper.GetExcelProtectPassword(), sumColumnNameArray, null, false, null);
    }