How can I rebind the drowdownlist in Edit page MVC

Abhilash J A

9y1.3k.NET

Hello everyone,

I am working on MVC 5, there I have Viewmodel Class ' PartnersVM '.

public class PartnersVM
{
public List listCountry { get; set; }
public PartnerVM listPartnerVM { get; set; }
}
public class CountryVM
{
public int idCountry { get; set; }
public string countries_name { get; set; }
}
public class PartnerVM
{
public string ServiceDistricts { get; set; }
public string ServiceStates { get; set; }
}

And this is ActionResult Get method.

[HttpGet]
public ActionResult PremiumUserRegistration()
{
PartnersVM objcountrymodel = new PartnersVM();
objcountrymodel.listCountry = new List();
objcountrymodel.listCountry = objPartnerBIL.ShowCountries().Select(item => new CountryVM
{
idCountry = item.idCountry,
countries_name = item.countries_name
}).ToList();
return View("PremiumUserRegistration", objcountrymodel);
}

After calling this actionresult now binding list of countries. And the dropdown onchage calling a jscript function for bind below dropdowns also.

View:

@Html.DropDownListFor(model => model.listCountry, new SelectList(Model.listCountry, "idCountry", "countries_name"), "Select", new { @class = "form-control ", @id = "ddlcountries", @onchange = "return getuserstate.search(this.value)" })
@Html.DropDownListFor(model => model.listPartnerVM.ServiceStates, Enumerable.Empty<SelectListItem>(), "Select Country", new { @id = "ddlstate", @class = "form-control ", @onchange = "return getdistricts.search(this.value)" })
@Html.DropDownListFor(model => model.listPartnerVM.ServiceDistricts, Enumerable.Empty<SelectListItem>(), "Select State", new { @id = "ddlDistrict", @class = "form-control " })

Now, all are working fine. But the problem is, I can not rebind those drowdown list while moving on edit page. Here Add/Edit page is one. How can I rebind the dropdownlist?

Please help me...

5 Replies

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Ibrahim Siddique9y ago
Yeah ignore view bag use user ienumurmrable select list just and your model.popertyname after that look at third parameter
Abhilash J A9y ago
@Ibrahim

Here , if ViewBag.SpecialistType is become null at 1st time calling actionmethod, Is it become error? Becuse here 1st time loading country only and next time by its onchage only happening other dropdowns bind.
Ibrahim Siddique9y ago
Sorry Brother My mistake

try this it will definetly work out

@Html.DropDownListFor(m => m.PropertyName, ViewBag.SpecialistType as SelectList, m => m.PropertyName , new { @class = "selectpicker" })

Please do share the feedback
Abhilash J A9y ago
@Ibrahim,

There is only one page Add/Edit so, I have already defined the drowpdownllist there like-
@Html.DropDownListFor(model => model.listPartnerVM.ServiceStates, Enumerable.Empty<SelectListItem>(), "Select Country", new { @id = "ddlstate", @class = "form-control ", @onchange = "return getdistricts.search(this.value)" })
Then, How can I use ViewBage there?
After calling edit ActionResult method, there is model valiue existing like below image show-
Ibrahim Siddique9y ago
Hi Abhilash

User this below code

@Html.DropDownListFor(m => m.PropertyName, ViewBag.SpecialistType as SelectList, "Specialist Type", new { @class = "selectpicker" })