Issue while converting IFormFile to string - entity-framework

Question

I am working a asp.netcore 3.1 project. I have 2 table with one to many relationship.
I am facing an issue in converting VideoId form IFormFile to String.
Here is my model and viewModel.
ParentModel.cs
public class Parent
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public List<child> Children { get; set; }
}
public class child
{
public int Id { get; set; }
public string VideoId { get; set; } // inside ParentModel videoId is string type
public int ParentId { get; set; }
}
ParentViewModel.cs
public class Parent
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public List<child> Children { get; set; }
}
public class child
{
public int Id { get; set; }
public IFormFile VideoId { get; set; } // inside ParentViewModel VideoId is IFormFile type
public int ParentId { get; set; }
}
ParentController.cs
public async Task<IActionResult> Create([FromForm] ParentViewModel parent)
{
var result = await _ParentService.Create(_mapper.Map<ParentModel>(parent)); // this line is ok. After this line VideoId is Microsoft.AspNetCore.Http.FormFile
if (parent.Child.Count > 0)
{
int id = 0;
foreach (var child in parent.Child){
var videoIdString = await _helper.UploadImage(child.VideoId, "path"); // In this line I convert videoId of child of ParentViewModel to string from IFormFile. Now VideoId is path.mp4
}
id++;
}
// I have to update VideoId of child of ParentModel with that coverted videoIdString
await _ParentService.Update(result);
return Created(nameof(Get), result);
}
I have to update VideoId of the child of ParentModel with converted videoIdString
How Can I do this? Anyone ideas, please...

Answer 1

first you don't need this DatabaseGenerated(DatabaseGeneratedOption.Identity)
because the default is on trying to understand from my code
public class MParent
{
[Key]
public int Id { get; set; }
public List<child> Children { get; set; }
}
public class Mchild
{
[Key]
public int Id { get; set; }
public string VideoId { get; set; }
public int ParentId { get; set; }
}
and view model
public class Parent
{
public int Id { get; set; }
public List<child> Children { get; set; }
}
public class child
{
public int Id { get; set; }
public IFormFile VideoId { get; set; }
public int ParentId { get; set; }
}
and my controller
[HttpPost]
public IActionResult Create(child child, IFormFile myfile)
{
Mchild mychild = new Mchild()
{
ParentId = child.ParentId,
VideoId = myfile.FileName
};
myfile.CopyToAsync(myfileLoctionTosaveVideo);
_context.add(mychild);
_context.savechanges();
return View();
}
and you can do these with file