c# - 如何将 SelectListItem 转换为 SelectList 并分配给 mvc 下拉列表

Question

下面是选择列表项的集合:我想将此选择项转换为 SelectList 并将其分配给 mvc dropdownlist。

List<SelectListItem>     Genderitems     =    new List<SelectListItem>();
Genderitems.Add(new SelectListItem() { Text = "Female", Value = "Female" });
Genderitems.Add(new SelectListItem() { Text = "Male", Value = "Male" });
Genderitems.Add(new SelectListItem() { Text = "Other Gender", Value = "Other Gender" });
Genderitems.Add(new SelectListItem() { Text = "Unspecified or Unknown", Value = "Unspecified or Unknown" });

Answer 1

也许你正在寻找这个

List<SelectListItem>     Genderitems     =    new List<SelectListItem>();
Genderitems.Add(new SelectListItem() { Text = "Female", Value = "Female" });
Genderitems.Add(new SelectListItem() { Text = "Male", Value = "Male" });
Genderitems.Add(new SelectListItem() { Text = "Other Gender", Value = "Other Gender" });
Genderitems.Add(new SelectListItem() { Text = "Unspecified or Unknown", Value = "Unspecified or Unknown" });
SelectList sl = new SelectList(Genderitems, "Value", "Text");
ViewBag.GenderList = sl;

在你看来如果您不想将选择严格限制在模型上

@Html.DropDownList("drpGender", ViewBag.GenderList as SelectList, "Select Gender", new { id = "drpGender"})

在其他情况下你可以

@Html.DropDownListFor(x=>x.Gender, ViewBag.GenderList as SelectList, " ", new { id = "drpGender"})