ds8-solution-pro/ds-wms-service/DS.WMS.PrintApi/Service/OpenPrintService.cs

using DS.WMS.PrintApi.Model;
using DS.WMS.PrintApi.Utils;
using FastReport.Data.JsonConnection;
using FastReport.Export.OoXML;
using FastReport.Export.Pdf;
using System.IO;
using System.Text;
using System;
using System.Threading.Tasks;

namespace DS.WMS.PrintApi.Service
{
    public class OpenPrintService : IOpenPrintService
    {
        public async Task<PrintDataResult> GetOpenJsonPrintInfo(OpenJsonPrintReq req)
        {
            try
            {
                using (var db = SqlSugarUtil.GetInstance())
                {
                    var template = db.Queryable<SysPrintTemplate>().Filter(null,true).Where(x => x.Id == req.TemplateId).First();
                    if (template == null)
                    {
                        return await Task.FromResult(PrintDataResult.Failed("打印模板不存在!"));
                    }
                    if (template.IsUseDataSource)
                    {
                        return await Task.FromResult(PrintDataResult.Failed("非Json打印接口!"));
                    } 

                    try
                    {
                        var basePath = String.Empty;
                        var savePath = "wwwroot/PrintTempFile";

                        var fileName = DateTime.Now.Ticks;
                        var printFileName = $"{fileName}.frx";
                        var printFile = Path.Combine(savePath, printFileName);

                        //写入CRX文件
                        using (FileStream fs = new FileStream(printFile, FileMode.Create))
                        {
                            Byte[] info = new UTF8Encoding(true).GetBytes(template.PrintJsonContent);
                            fs.Write(info, 0, info.Length);
                        }

                        //生成报表
                        FastReport.Report report = new FastReport.Report();
                        report.Load(printFile);

                        var dataSource = report.Dictionary.Connections[0] as JsonDataSourceConnection;
                        var str = new FastReport.Data.JsonConnection.JsonDataSourceConnectionStringBuilder();
                        str.Json = req.JsonDataStr;
                        dataSource.ConnectionString = str.ConnectionString;

                        report.Prepare();
                        var printName = string.Empty;
                        var saveFile = string.Empty;
                        //var saveFile = Path.Combine(savePath, printName);
                        if (req.PrintType == "1")
                        {
                            printName = $"{fileName}.pdf";
                            saveFile = Path.Combine(savePath, printName);
                            PDFExport pdfExport = new PDFExport();
                            pdfExport.Export(report, saveFile);
                        }
                        else if (req.PrintType == "2")
                        {
                            printName = $"{fileName}.xlsx";
                            saveFile = Path.Combine(savePath, printName);
                            Excel2007Export excelExport = new Excel2007Export();
                            excelExport.Export(report, saveFile);
                        }
                        else if (req.PrintType == "3")
                        {
                            printName = $"{fileName}.doc";
                            saveFile = Path.Combine(savePath, printName);
                            Word2007Export wordExport = new Word2007Export();
                            wordExport.Export(report, saveFile);
                        }
                        else
                        {
                            return await Task.FromResult(PrintDataResult.Failed("非法打印格式!"));
                        }

                        return await Task.FromResult(PrintDataResult.OK(printName));
                    }
                    catch (Exception e)
                    {
                        return await Task.FromResult(PrintDataResult.Failed(e.Message));
                    }
                }
            }
            catch (Exception ex)
            {
                //Logger.Warn(ex, "方法: GetOpenJsonPrintInfo");
                return await Task.FromResult(PrintDataResult.Failed(ex.Message));
            }
        }
    }
}