vb.net - html.dropdownlistfor selected value not selected -

been stuck on 2 days...hoping guys can help.

using vb.net mvc4 framework.

i have html.dropdownlistfor in view looks this:

@html.dropdownlistfor(function(model) model.title, new selectlist(model.titles, "key", "value"), "-select-", new {.id = "titles", .class = "form-control"}) 

model.titles dictionary(of string, string) such short list i'd rather pull directly function instead of database. got idea use dictionary list here:

http://nimblegecko.com/dropdownlistfor-with-dictionaries-in-asp-net-mvc-and-why-selectlist-wants-to-kill-you/

my function looks this, gets pulled model model.titles

public function getagcreptitles() dictionary(of string, string) dim list new dictionary(of string, string)     list.add("a/d/sgt", "a/d/sgt")     list.add("a/sgt", "a/sgt")     list.add("cpl", "cpl")     list.add("det", "det")     return list end function 

everything works great, displays list , saves selected value database. in debug mode, when explore dropdownlistfor in view, can see model.title has retrieve correct value database (eg. "det"), , can see model.titles contains above list function. hard try, can't dropdownlistfor display model.title list.

the select element within html doesn't have selected option, otherwise looks good:

<select name="title" class="form-control">     <option value="">-select-</option>     <option value="a/d/sgt">a/d/sgt</option>     <option value="a/sgt">a/sgt</option>     <option value="cpl">cpl</option>     <option value="det">det</option> </select> 

i've tried adding model.title value selectedvalue of selectlist in view. i've tried using list of selectlistitems instead of dictionary , sending view via viewbag.mytitles. i've tried using integers key values (0,1,2,3...). nothing works.

i should add have dropdownlistfor in same view works perfectly. when compare them....this 1 pulls list database selectlistitems selectlist (which uses value , text, instead of key , value respectively), value integer starting @ 0 , text string.

really banging head one.

edit: more info. when submit form, modified data uploaded database, , controller sends model data view. okay....in view dropdownlistfor works!!! click refresh, , lose selected value dropdownlistfor (even though model data identical).

here controller:

 <allowanonymous()> _     function update() actionresult          if websecurity.isauthenticated             dim user = db.agcrepprofile.where(function(agcrep) agcrep.email = websecurity.currentusername).tolist             if user.count = 1                 dim getagencies = db.agencyprofile.where(function(agency) agency.active = true).orderby(function(agency) agency.name).tolist                 viewbag.myagencies = new selectlist(getagencies, "agcid", "name")                 user(0).titles = new mylists().getagcreptitles                 viewdata("success") = ""                 return view(user(0))             end if         end if          return redirecttoaction("index", "home")      end function      <httppost()> _     <validateantiforgerytoken()> _     function update(agcrep agcrep) actionresult          if modelstate.isvalid , websecurity.isauthenticated             db.entry(agcrep).state = entitystate.modified             db.savechanges()             dim agencies = db.agencyprofile.where(function(agency) agency.active = true).orderby(function(agency) agency.name).tolist             viewbag.myagencies = new selectlist(agencies, "agcid", "name", agcrep.agcid.tostring)             agcrep.titles = new mylists().getagcreptitles             viewdata("success") = "changes have been saved"         else             viewdata("success") = "update failed. please try again."                        end if          return view(agcrep)      end function 

got it! sweet jebus painful.

turns out can't have viewdata or viewbag containing variable same name model variables.

as removed viewbag("title") top of view, model.title worked perfectly.