How to show one value and post another one in .net core? [duplicate] - mysql

Question

I have 2 classes. Photos and Albums
I need to include the Album names in my Photos/Create View and create Dropdowns for Album names.
The model in my View Photo/Create is : ImageViewModel
How can I get it?
public class Album
{
public int Id { get; set; }
[Required]
[MinLength(5), MaxLength(100)]
public string Name { get; set; }
private DateTime? dateCreated = null;
public DateTime CreatedOn
{
get => dateCreated.HasValue ? this.dateCreated.Value : DateTime.Now;
set => this.dateCreated = value;
}
public virtual List<PhotoAlbums> PhotoAlbums { get; set; }
}
public class PhotoAlbums
{
public int PhotoId { get; set; }
public Photo Photo { get; set; }
public int AlbumId { get; set; }
public Album Album { get; set; }
}
public class Photo
{
public int Id { get; set; }
public byte[] Picture { get; set; }
public string Name { get; set; }
public string AlbumNames { get; set; }
public virtual List<PhotoAlbums> PhotoAlbums { get; set; }
}
public class ImageViewModel
{
private readonly IUnitOfWork _unitOfWork;
public ImageViewModel()
{
_unitOfWork = new UnitOfWork<ApplicationDbContext>();
}
public int Id { get; set; }
public string FileName { get; set; }
public byte[] ImageData { get; set; }
public string File { get; set; }
public string Albumname { get; set; }
public string ImageSrc
{
get
{
string base64 = Convert.ToBase64String(ImageData);
string imgSrc = String.Format("data:image;base64,{0}", base64); //"data:image/png;base64,{0}"
return imgSrc;
}
}
}

Answer 1

Here is how I would create a drop down list of albums. Good luck.
Try adding an IEnumerable<SelectListItem> to your ImageViewModel for your DropdownList of Albums.
public class ImageViewModel
{
private readonly IUnitOfWork _unitOfWork;
public ImageViewModel()
{
_unitOfWork = new UnitOfWork<ApplicationDbContext>();
}
public int Id { get; set; }
public string FileName { get; set; }
public byte[] ImageData { get; set; }
public string File { get; set; }
public string Albumname { get; set; }
public string ImageSrc
{
get
{
string base64 = Convert.ToBase64String(ImageData);
string imgSrc = String.Format("data:image;base64,{0}", base64); //"data:image/png;base64,{0}"
return imgSrc;
}
}
public int AlbumId{ get; set; }
public IEnumerable<SelectListItem> Albums { get; set; } //you dropdown
}
Then in your controller, hydrate the DropdownList of Albums.
List<Album> albums = null; //get your albums from _context
var model = new ImageViewModel();
model.Albums = new SelectList(albums, "Id", "Name");
//hydrate the rest of your model..
Finally in your view, display your DropdownList of Albums.
#Html.DropDownListFor(model => model.AlbumId, Model.Albums })

Answer 2

Add Model In View Page:
#model IEnumerable<ImageViewModel>
then Generate DropDown:
<select id="dropdowntipo">
<option value="0">Select Item</option>
#{
foreach(var item in Model)
{
<option value= "#item.Value">#item.DisplayText</option>
}
}
</select>

Answer 3

You could just use ViewBag to pass data from controller to view. Assume you have Albums table in your dbContext:
public DbSet<Album> Albums{ get; set; }
1.Create Action:
public class PhotosController : Controller
{
private ApplicationDbContext _context { get; set; }
publicPhotosController(ApplicationDbContext context)
{
_context = context;
}
public IActionResult Create()
{
var model = new ImageViewModel();
ViewBag.AlbumList = _context.Albums.ToList();
return View(model);
}
}
2.Create View:
#model ImageViewModel
#*other view code*#
#Html.DropDownListFor(model => model.Albumname , new SelectList(ViewBag.AlbumList,"Name","Name"))