列表问题的最佳重载

Question

@Html.DropDownList(expression: model => model.CategoryID, 
   new List<SelectListItem>(Model.CategorySelectListItem, dataValueField: "Value",
   dataTextField: "Text"),htmlAttributes:new {@class = "form-control"})

This is my code, what does the error mean and how do I fix it?

Answer 1

What you need is a new instance of SelectList actually not a List of SelectListItem , change your code like this and it works fine:

@Html.DropDownList(expression: model => model.CategoryID,
      new SelectList(Model.CategorySelectListItem, dataValueField: "Value", 
      dataTextField: "Text"),htmlAttributes:new {@class = "form-control"})