asp.net mvc 3 - Custom model binder for inner model -

asp.net mvc 3 - Custom model binder for inner model -

i got model this:

public class mainmodel { public string id {get;set;} public string title {get;set;} public timepicker timepickerfield {get;set;} }

timepicker inner model looks this:

public class timepicker { public timespan {get;set;} public ampmenum ampm {get;set;} }

i'm trying create custom model binding inner model: timepicker

the question is: how values in custom model binder submitted in form timepicker model fields?

if seek this:

var value = bindingcontext.valueprovider.getvalue(bindingcontext.modelname);

i null in value.

i'm not sure how implement model binder correctly.

public class timepickermodelbinder : defaultmodelbinder { public override object bindmodel(controllercontext controllercontext, modelbindingcontext bindingcontext) { if (bindingcontext == null) { throw new argumentnullexception("bindingcontext"); } var result = new timepicker(); var value = bindingcontext.valueprovider.getvalue(bindingcontext.modelname); if (value != null) { bindingcontext.modelstate.setmodelvalue(bindingcontext.modelname, value); seek { //result = duration.parse(value.attemptedvalue); } grab (exception ex) { bindingcontext.modelstate.addmodelerror(bindingcontext.modelname, ex.message); } } homecoming result; } }

the next works me.

model:

public enum ampmenum { am, pm } public class timepicker { public timespan time { get; set; } public ampmenum ampm { get; set; } } public class mainmodel { public timepicker timepickerfield { get; set; } }

controller:

public class homecontroller : controller { public actionresult index() { var model = new mainmodel { timepickerfield = new timepicker { time = timespan.fromhours(1), ampm = ampmenum.pm } }; homecoming view(model); } [httppost] public actionresult index(mainmodel model) { homecoming view(model); } }

view (~/views/home/index.cshtml):

@model mainmodel @using (html.beginform()) { @html.editorfor(x => x.timepickerfield) <button type="submit">ok</button> }

custom editor template (~/views/shared/editortemplates/timepicker.cshtml) merges time , ampm properties single input field , require custom model binder later in order split them when form submitted:

@model timepicker @html.textbox("_picker_", string.format("{0} {1}", model.time, model.ampm))

and model binder:

public class timepickermodelbinder : imodelbinder { public object bindmodel( controllercontext controllercontext, modelbindingcontext bindingcontext ) { var key = bindingcontext.modelname + "._picker_"; var value = bindingcontext.valueprovider.getvalue(key); if (value == null) { homecoming null; } var result = new timepicker(); seek { // todo: instead of hardcoding parsing // value.attemptedvalue contain string // entered user homecoming new timepicker { time = timespan.fromhours(2), ampm = ampmenum.pm }; } grab (exception ex) { bindingcontext.modelstate.addmodelerror( bindingcontext.modelname, ex.message ); // of import in order preserve original user // input in case of error when redisplaying view bindingcontext.modelstate.setmodelvalue(key, value); } homecoming result; } }

and register model binder in application_start:

modelbinders.binders.add(typeof(timepicker), new timepickermodelbinder());

asp.net-mvc-3 asp.net-mvc-2 custom-model-binder custom-binding