System.ArgumentNullException:Object reference not set?

Hi Team

I am getting this exception "Object reference not set to an instance of an object". I am trying to create a checkbox within a form using asp.net mvc. Below is my logic and need some help around this issue to fix it, please mates.

public class EditTrainingRegFormViewModel
{
public string Title { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Position { get; set; }
public string Company { get; set; }
public string Address { get; set; }
[Display(Name = "Choose country")]
public int ? SelectedCountryId { get; set; }
public string Code { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Cell_Number { get; set; }
public List Dietary_requirement { get; set; }
public string Email { get; set; }
public int Country_Id { get; set; }
public string Country_Name { get; set; }
}
public class CheckBoxes
{
public string Text { get; set; }
public bool Checked { get; set; }
}
// GET://Manage/Check box for Dietary-Req
public ActionResult DietReq()
{
EditTrainingRegFormViewModel model = new EditTrainingRegFormViewModel();
model.Dietary_requirement = new List
{
new CheckBoxes {Text = "None"},
new CheckBoxes {Text = "Vegetarian"},
new CheckBoxes {Text = "Vegan"},
new CheckBoxes {Text = "Halaal"}
};
return View(model);
}
class="row">
for="Dietary Requirements">Dietary Requirements
class="input-group col-md-6 col-md-offset-3 col-sm-6 col-xs-6">
class="input-group pull-left">
@for(int i = 0; i// Error is thrown here as not set to an instance.
{
@Html.HiddenFor(m=>m.Dietary_requirement[i].Text)
@Html.CheckBoxFor(m=>m.Dietary_requirement[i].Checked, new {id = string.Format("dietary_requirement_{0}", i) })
}

7 Replies

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Guest User6y ago
Nagaraju

Its complaining about the object is not with the current context, esp when i declare it as same what you shown here.

public class CheckBoxes {

Dietary_requirement = new List();

}

Its coming from the view Reddy inside the for loop statement, why im suprised as to why.
0
Sreekanth Reddy6y ago
Can you please trace the exact line, where you are getting the exception ?
0
Guest User6y ago
Im still not getting progressing, still doing the same thing over and again. See the new changes below
if(Model.Dietary_requirement.Count>0)
{
@for(int i = 0; i
  {
@Html.HiddenFor(m=>m.Dietary_requirement[i].Text)
@Html.CheckBoxFor(m=>m.Dietary_requirement[i].Checked, new {id = string.Format("dietary_requirement_{0}", i)    })
  }
}
0
Sreekanth Reddy6y ago
Write your for loop within the if condition.

@if(Model.Dietary_requirement.Count>0)
{

// Go with your for loop here.

}

Thank you.
0
Vishvjit Shinde6y ago
Hi,
the main reason above error is because of null or empty value
we have to check the condition like this:
if(Model.Dietary_requirement.Count>0)
{
@for(int i = 0; i
  {
@Html.HiddenFor(m=>m.Dietary_requirement[i].Text)
@Html.CheckBoxFor(m=>m.Dietary_requirement[i].Checked, new {id = string.Format("dietary_requirement_{0}", i)    })
  }
}
0
Guest User6y ago
Do i remove the for loop and replace it with if statement to allow for empty object?
0
Rajanikant Hawaldar6y ago
@if(Model == null || Model.Dietary_requirement == null){ no items found } else{ @for(int i = 0; im.Dietary_requirement[i].Text) @Html.CheckBoxFor(m=>m.Dietary_requirement[i].Checked, new {id = string.Format("dietary_requirement_{0}", i) }) } }
0