I want when i enter string value in form Controller Return value in Id

Question

This is My Controller Please Tell me How to solve This Issue I want when i enter string value in form Controller Return value in Id but it return in String

This issue was occur when i can save data in that Technology field

public async Task<IActionResult> Create([Bind("ProjectId, ProjectName,Description,Start,End,ProjectHead,Status,Technology")] Project project)
        {
            if (ModelState.IsValid)
            {
                _context.Add(project);
                await _context.SaveChangesAsync();
                var tech = project.Technology.Split(",");
                foreach(var te in tech)
                {
                    ProjectTechnology projectTechnology = new ProjectTechnology();
                    projectTechnology.ProjectId = project.ProjectId;
                    projectTechnology.TechnologyId = Convert.ToInt32(te);
                    _context.Add(projectTechnology);
                    await _context.SaveChangesAsync();
                }
                return RedirectToAction( nameof (Index));
            }
            return View(project);
        }
,,,