DD.WellWorkover.Cloud/ConsoleApp1/Program.cs

using AsbCloudApp.Data;
using AsbCloudDb.Model;
using AsbCloudInfrastructure.Services;
using AsbCloudInfrastructure.Services.Cache;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
//using AsbSaubReport;
//using AutoMapper;
using Microsoft.EntityFrameworkCore;
using System;

namespace ConsoleApp1
{
    class Program
    {

        static void Main(/*string[] args*/)
        {

            //var options = new DbContextOptionsBuilder<AsbCloudDbContext>()
            //    .UseNpgsql("Host=localhost;Database=postgres;Username=postgres;Password=q;Persist Security Info=True")
            //    .Options;
            //var context = new AsbCloudDbContext(options);

            var fileNames = new string[] { @"d:\temp\1\book1.xlsx", @"d:\temp\1\book2.xlsx" };

            using var spreadsheetDocument = SpreadsheetDocument.Create(@"d:\temp\1\b.xlsx", SpreadsheetDocumentType.Workbook);
            // Add a WorkbookPart and Workbook objects.  
            WorkbookPart workbookpart = spreadsheetDocument.AddWorkbookPart();
            workbookpart.Workbook = new Workbook();

            // Add a WorksheetPart to the WorkbookPart.
            WorksheetPart worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
            worksheetPart.Worksheet = new Worksheet(new SheetData());

            // Add Sheets to the Workbook.
            Sheets sheets = spreadsheetDocument.WorkbookPart.Workbook.
                AppendChild<Sheets>(new Sheets());

            // Append a new worksheet and associate it with the workbook.
            Sheet sheet = new Sheet()
            {
                Id = spreadsheetDocument.WorkbookPart.
                    GetIdOfPart(worksheetPart),
                SheetId = 1,
                Name = "mySheetNameISHere!"
            };
            sheets.Append(sheet);

            spreadsheetDocument.Save();
            spreadsheetDocument.Close();

            Console.WriteLine("Done. Press any key to quit.");
            Console.ReadKey();
        }

    }
}