How do I use a SelectListItem in ASP.NET MVC to display choices via a List Box or Check List box -

-

i've been reading several articles how present choices users. use listboxfor, use checkboxfor, , there thing called multiselectlist.

what (was) confused each example seemed have done totally different way, , none of them used built in "selectlistitem" class instead created own.

so going post question asking general clarification, thought representative of other various post , repetitive.

so let me re-phrase: how use "list" or "multiselectlist" present user list of choices, including option them displayed list of check boxes?

in other words, if have following 2 items in model, how display each of them typical choice list box, or typical check list box?

public list<selectlistitem> widgets1 { get; set; } public multiselectlist widgets2 { get; set; }

warning... wanted point out "checkbox" option hangs once many choices. (e.g. changed loop 500) , won't submit.

the problem traced validation of checkboxfor line. can fixed changing 1 line to...

                        @html.checkboxfor(cc => cc.widgetsaschecklist[myindex].selected, new { data_val = "false",  htmlattributes = new { @class = "form-control" } })

if this, can have 1,500 items in check list , submit occurs in under 3 seconds


Comments

Post a Comment

Popular posts from this blog

Django REST Framework perform_create: You cannot call `.save()` after accessing `serializer.data` -

-
i have following viewset: class artistprofileviewset(viewsets.modelviewset): queryset = artistprofile.objects.all() serializer_class = artistprofileserializer def perform_create(self, serializer): if serializer.is_valid(): serializer.save() with following serializers: class simpleartisttrackserializer(serializers.hyperlinkedmodelserializer): class meta: model = artisttrack fields = (...my fields...) class artistprofileserializer(serializers.hyperlinkedmodelserializer): owners = userserializer(many=true, required=false) tracks = simpleartisttrackserializer(many=true, required=false) class meta: model = artistprofile fields = (...my fields...) i getting following error: assertionerror: cannot call `.save()` after accessing `serializer.data`.if need access data before committing database inspect 'serializer.validated_data' instead. i don't see editing serializer.data object. th...
Read more

Why does Go error when trying to marshal this JSON? -

-
i'm trying rather simple example of trying decode json file structs using golang. however, when attempting error that json: cannot unmarshal object go value of type []main.track which don't understand. here's code in question, , json can found here . package main import ( "encoding/json" "fmt" "net/http" "os" ) // tracks group of track types type tracks struct { tracks []track } // track represents singular track type track struct { name string url string artist artist } // artist represents single artist type artist struct { name string mbid string url string } func main() { url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=netherlands" response, err := http.get(url) if err != nil { fmt.printf("%s\n", err) os.exit(1) } de...
Read more