C#实现打印（反射）

前端：

function printTask(obj) {
    var rowData = $("#tb").DataTable().row($(obj).parents('tr')[0]).data();
    var url = "/Material/PrintContract";
    var inputs = '<input type="hidden" name="conid" value="' + rowData.WengvNj + '" />';
    $('<form action="' + url + '" method="post" target="_blank">' + inputs + '</form>').appendTo('body').submit().remove();
}

　　后台：

public FileResult PrintContract(string conid)
{
  MemoryStream ms = new FileHelper().PrintContractNew(mesContract, 
                detailsEntity,
                pnEntity.FirstOrDefault(),
                cuInfo, 
                filiale,
                cuInuser,
                sysUser,
                dtReturn);
            return File(ms, "application/pdf");
}

public MemoryStream PrintContractNew(MesContract mesContract,
            IList<MesContractDetails> mesContractDetails,
            MesPn pnEntity, 
            CuInfo cuInfo,
            DataFiliale filiale,
            IList<CuInuser> cuInusers,
            SysUser sysUser,
            DataTable dtReturn)
        {
            string filePath = "";

            //根据合同类型需要走两个分支，采购根据供应商调用不同的模板
            string contractType = mesContract.MesType;
            
            if (contractType == "采购")
            {
                string supplierName = mesContract.MesCuid;
                if (supplierName == "SUP501") //商飞公司
                    filePath = HttpContext.Current.Server.MapPath("~/Files/Modal/ShanFeiProcurementContract.docx");
                else    //采购的其他公司
                    filePath = HttpContext.Current.Server.MapPath("~/Files/Modal/ProcurementContract.docx");
            }
            else  //送修和索赔合同
                filePath = HttpContext.Current.Server.MapPath("~/Files/Modal/SendRepair.docx");
             
            //判断文件是否存在
            if (!File.Exists(filePath)) return null;
            
            Document document = new Document(filePath);


            if (contractType == "采购")
            {
                if (mesContractDetails != null || mesContractDetails.Count > 0)
                {
                    //  TODO  代码瞎写，采购中每项都来自，自己的选项中，
                    foreach (var item in mesContractDetails)
                        item.MesCurrency = mesContract.MesCurrency;

                    PrintPurchse(document, mesContractDetails);

                    //TODO 给税率赋值，瞎写，这个税率等于总税率
                    mesContract.WengvJdjpjxrq = mesContractDetails[0].WengvZtpbBlfr;
                }
            }
            else
                PrintUnPurchse(document, mesContractDetails, dtReturn);

            string emergencyLevel = GetSortedDictionaryValue(mesContract.MesEmer, GetEmergencyLevelType());//获取紧急程度
            mesContract.WengvJslz = emergencyLevel;

            string tranSportType = GetSortedDictionaryValue(mesContract.MesTransport, GetTranSportType());//运输方式
            mesContract.WengvYxhvbzzdg = tranSportType;

            string payName = GetByEnglisConverToChine(dtPay, mesContract.MesPaymentmet, "BM_CODE", "BM_ABBR");//付款方式
            mesContract.WengvUgfunxeyrh = payName;

            string currencyName = GetByEnglisConverToChine(dtCurrency, mesContract.MesCurrency, "RMB_CODE", "RMB_CNAME"); //币种
            mesContract.WengvHayznxnk = currencyName;

            string moneyCapital = ConvertToChinese(mesContract.MesSum.ToString());//小写转大写
            mesContract.MesMoneyCapital = moneyCapital;


            ReKey(document.Range, mesContract); //合同信息

            ReKey(document.Range, cuInfo);//客户公司信息
            ReKey(document.Range, filiale);//打印甲方公司

            CuInuser cuInuser = cuInusers.FirstOrDefault();
            if (cuInuser == null)
                cuInuser = new CuInuser();
            ReKey(document.Range, cuInuser);//客户公司的人员信息

            if (sysUser == null)
                sysUser = new SysUser();
            
            ReKey(document.Range, sysUser);//用户信息

            return GetMeoryStreamByFileStream(filePath, document);
        }

private static void ReKey(Range range, object model)
        {
            if (model == null) return;
            Type t = model.GetType();
            PropertyInfo[] pi = t.GetProperties();
            foreach (PropertyInfo p in pi)
            {
                var v = p.GetValue(model, null);
                string va = "";
                if (v != null)
                {
                    if (v.GetType() == typeof(DateTime) || v.GetType() == typeof(Nullable<DateTime>))
                    {
                        va = DateTime.Parse(v.ToString()).ToString("yyyy-MM-dd");
                    }
                    else
                    {
                        va = v.ToString();
                    }
                }
                FindReplaceOptions op = new FindReplaceOptions();
                op.FindWholeWordsOnly = false;

                range.Replace("$" + p.Name + "$", va, op);
                //range.Replace("$" + p.Name + "$", va);
            }
        }

private static MemoryStream GetMeoryStreamByFileStream(string filePath, Document doc)
        {
            if (!File.Exists(filePath)) return null;
            using (FileStream stream = File.OpenRead(filePath))
            {
                if (stream == null) return null;
                MemoryStream ms = new MemoryStream();
                doc.Save(ms, SaveFormat.Pdf);
                ms.Flush();
                ms.Seek(0, SeekOrigin.Begin);
                return ms;
            }
        }

　　生成table：

private Table PrintMesContractDetail(Document document, IList<MesContractDetails> mesContractDetails)
        {
            try
            {
                Table tb = (Table)document.GetChild(NodeType.Table, 1, true);
                int i = 1;
                foreach (var item in mesContractDetails)
                {
                    //序号、件号、名称、数量、单位、 状态、不含税单价、含税单价、含税总价、币种、交货期、证书、备注
                    string[] colunValues = new string[] {  //TODO 其他列用不用判断
                         i.ToString(),//序号
                         item.MesPno, //件号
                         item.MesProductname,//名称
                         item.MesCount, //数量
                         GetByEnglisConverToChine(dtUnit,item.MesUnit,"BM_CODE","BM_CNAME"),//单位
                         "NE",//状态
                         item.MesNottxaprice.ToString(),//不含税单价
                         item.MesTxaprice.ToString(),//含税单价
                         item.MesTxaprice.ToString(),//含税单价
                         GetByEnglisConverToChine(dtCurrency,item.MesCurrency,"RMB_CODE","RMB_CNAME"),//币种
                         item.MesDeliverydate.ToString(),//交货期
                         item.MesCertification= item.MesCertification==null?"":item.MesCertification//证书
                     };
                    i++;
                    var tr = CreateRow(12, colunValues, document);
                    tb.Rows.Add(tr);
                }
                return tb;
            }
            catch (Exception ex)
            {
                LogWriter.Write(LOG_CATEGORY.WIN_UI, LOG_LEVEL.ERROR, "PrintMesContractDetail:" + ex.ToString());
                return null;
            }
        }

　　生成table：

private static Row CreateRow(int columnCount, string[] columnValues, Document doc)
        {
            Row r2 = new Row(doc);
            for (int i = 0; i < columnCount; i++)
            {
                if (columnValues.Length > i)
                {
                    var cell = CreateCell(columnValues[i], doc);
                    r2.Cells.Add(cell);
                }
                else
                {
                    var cell = CreateCell("", doc);
                    r2.Cells.Add(cell);
                }
            }
            return r2;
        }

　　把不需要的代码去掉就行.