Exception when creating property of a model in Mvc(Object reference not set to an instance of an object)

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Hi,

i am creating a model that set property of another model my code is:

this is my base model code

XML

public class BaseModel
   {
       public Guid LeadsId { get; set; }
       public Guid UserId { get; set; }
       public string Description { get; set; }
       public AddressModel addressModel { get; set; }
      
   }

and this is my address model code

SQL

public class AddressModel
   {
       public string Street { get; set; }
       public string City { get; set; }
       public string ZipCode { get; set; }
       public string Country { get; set; }
       public List<SelectListItem> CountryList { get; set; }
       public List<SelectListItem> StateList { get; set; }
       public List<SelectListItem> CityList { get; set; }
       public AddressModel()
       {
           CountryList = new List<SelectListItem>();
           CityList = new List<SelectListItem>();
           StateList = new List<SelectListItem>();
       }

this is my code for countylist binding

public ActionResult CreateLead()
{
LeadsModel model = new LeadsModel();
model.addressModel.CountryList = objAds.SelectCountryList();
return View(model);
}
but it through exception Object reference not set to an instance of an object

Please Help me....Thanks.

Posted 29-Jul-14 23:49pm

Yogesh Kumar Tyagi

Updated 30-Jul-14 2:14am

v2

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Nathan Minier · Accepted Answer · 2014-07-30T02:33:00

Solution 1

Since your AddressModel has an initializer, you'll need to create an instance of it in order to use it properly.

C#

public class BaseModel
   {
       public Guid LeadsId { get; set; }
       public Guid UserId { get; set; }
       public string Description { get; set; }
       public AddressModel addressModel { get; set; }

       // add default constructor that initializes addressModel
       public BaseModel()
       {
           addressModel = new AddressModel();
       }
      
   }

Posted 30-Jul-14 2:33am

Nathan Minier

Comments

Yogesh Kumar Tyagi 30-Jul-14 8:46am

Thanks... But on "HTTPPOST" the AddressModel value empaty

Yogesh Kumar Tyagi 30-Jul-14 8:58am

can i used this for both "HTTPGET" and "HTTPPOST"

Nathan Minier 30-Jul-14 9:08am

I just realized, we haven't seen the code for your LeadsModel, is there anything else in there which might be affecting things?

Also, can I see your View, as it's entirely likely the issue is in there.

Yogesh Kumar Tyagi 30-Jul-14 9:24am

i am calling partial view for address information

<div>@{Html.RenderPartial("~/Areas/Leads/Views/Address/_Address.cshtml", Model.addressModel);}</div>
but your approach work nice on "HttpGet" Request but on httpPost it will create a new instance of AddressModel so i m not able to save data pls help

Nathan Minier 30-Jul-14 10:07am

If I had to guess, without seeing the code for the view, I'd say that whatever posting mechanism you're using to send back to the controller is not aware of what's in your partial view. I would strongly suggest either rolling the address information form into the View that you're using, or creating an editor template for the address fields if you plan to use that object with different views.

Yogesh Kumar Tyagi 30-Jul-14 10:10am

Thanks Dear ....for help

Yogesh Kumar Tyagi · Accepted Answer · 2014-07-30T03:20:00

I solve it by creating instance of AddressModel but it created a New instance both "HttpPost" and "HttpGet" request and my view result is empty

pls tell me how to send data on controller by this approach.

SQL

public class BaseModel
   {
       public Guid LeadsId { get; set; }
       public Guid UserId { get; set; }
       public string Description { get; set; }
       public AddressModel addressModel { get; set; }

       // add default constructor that initializes addressModel
       public BaseModel()
       {
           addressModel = new AddressModel();
       }

   }

[HttpPost]
public ActionResult(BaseModel model)
{
}
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Exception when creating property of a model in Mvc(Object reference not set to an instance of an object)

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Exception when creating property of a model in Mvc(Object reference not set to an instance of an object)

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