如何在ASP.Net MVC中创建下拉列表

Question

I have a query like bellow code I am new to ASP.Net MVC:

 var MyCompanies = _context.MyCompanyInfoContext.Where(u => u.UserId == user.Id).OrderBy(o => o.CompanyName);

How to generate drop down list in view

my view code:

@Html.DropDownListFor(model=>model.CompanyId, new SelectListItem(ViewBag.MyCompanies))

but I get errors

'SelectListItem' does not contain a constructor that takes 1 arguments

Answer 1

请尝试下面的代码，这应该工作：

@Html.DropDownListFor(model => model.CompanyId, new SelectList(ViewBag.MyCompanies, "Id", "CompanyName"), "- Please Select -", new { @required = "required", @class = "form-control " })