asp.net - Using 5th overload of Html.DropDownList causes exception. (does not contain a definition for 'DropDownList' and the best extension method overload..) -


i have model property

public list<system.web.mvc.selectlistitem> responsetypes { get; set; }

and in view have on view causes error

error cs1928: 'system.web.mvc.htmlhelper' not contain definition 'dropdownlist' , best extension method overload 'system.web.mvc.html.selectextensions.dropdownlist(system.web.mvc.htmlhelper, string

@html.dropdownlist("responsetypeid", "--select response type--", question.responsetypes, new { @class = "form-control responsetype", @id = "cbxtype" })

i trying use overload

public ihtmlstring dropdownlist(string name, string defaultoption, ienumerable<selectlistitem> selectlist, idictionary<string, object> htmlattributes);

i can't seem figure out what's wrong code. believe have followed overload properly.

i have tried casting it. still doesn't work though.

@html.dropdownlist("responsetypeid", "--select response type--", (ienumerable<selectlistitem>)question.responsetypes, new { @class = "form-control responsetype", @id = "cbxtype" })

your using method in system.web.webpages.html namespace, not system.web.mvc namespace.

what need use this overload signature is

public static mvchtmlstring dropdownlist(     htmlhelper htmlhelper,     string name,     ienumerable<selectlistitem> selectlist,     string optionlabel,     object htmlattributes )

so code in view be

@html.dropdownlist("responsetypeid", question.responsetypes, "--select response type--", new { @class = "form-control responsetype", id = "cbxtype" })

however recommend use typed

@html.dropdownlistfor(m => m.responsetypeid, question.responsetypes, "--select response type--", new { @class = "form-control responsetype", id = "cbxtype" })

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