我正在使用ASP.NET Core 2.2开发一种简单的表单,并且在我拥有的表之间有脚本和标签,它们之间具有N:M的关系。我可以在“ CreateScripts.html”文件中的多个标记之间进行选择,但是最后只选择了一个标记。我已经搜索了文档,但找不到答案。谁能帮我?预先感谢。
部分脚本类:
[Key]
public int idScript { get; set; }
[ForeignKey("Tags")]
[Display(Name = "Tags")]
public int idTags { get; set; }
CreateScripts.html选择:
<div class="form-group">
<label asp-for="Scripts.idTags" class="control-label"></label>
</br>
<select multiple="multiple" asp-for=" Scripts.idTags" asp-items="Model.listatag">
</select>
</div>
Create.html.cs:
public async Task OnGet()
{
var linguagem = from l in _context.Linguagem
select l;
l = await linguagem.ToListAsync();
listatag = _context.Tags.Select(x => new SelectListItem
{
Value = x.idTags.ToString(),
Text = x.nmTags
});
}
[BindProperty]
public Scripts Scripts { get; set; }
public async Task<IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return Page();
}
Scripts.dtcriacaoScript = DateTime.Today.Date;
Scripts.dtultimoacessoScript = DateTime.Today.Date;
Scripts.idVersao = Convert.ToInt32(Scripts.idVersao);
Scripts.idLinguagem = Convert.ToInt32(Scripts.idLinguagem);
Scripts.idTags = Convert.ToInt32(Scripts.idTags);
_context.Scripts.Add(Scripts);
await _context.SaveChangesAsync();
return RedirectToPage("./Index");
}
}
}