retain values on postback in Asp.net mvc

Question

enter image description here I have a data in following pattern; as shown in image attached,

I want to repopulate all these values and controls on Postback. I am using asp.net MVC

If i should use a list then how can i tackle the multiple values of subject to be saved in one column but on view displayed in different column

          currently using forms collection:


int rows=request.Form["rows"];
int colmn=requst.form["comn"];


var list1=new list<mymodel>{
new mymodel {}}
;
for (var row = 1; row <= noOfRows; row++)
{

  list1.Add(new mymodel()
   {
       name= Request.Form["name-row"].ConvertToInt()
        rollno= Request.Form["rollno-row"].ToString(),
   });




   for (int colmn = 1; colmn <= noOfColmns - 1; colmn++)
  {
       list1.Add(new mymodel()
      {

          subject = Request.Form["subj-row-colmn"].ConvertToInt()
       });

    }
}

let me know if something else is needed

Important Note:

I think i am not able to explain what i want,so i have narrowed a problem , To be more precise i have created a list ,i have populated a list as

 var list1=new list<mymodel>{
    new mymodel {}}
 list1.Add(new mymodel()
       {
           name= Request.Form["name-row"].ConvertToInt(),
            rollno= Request.Form["rollno-row"].ToString(),
            subj=new list{}

       });

,now i want to loop through this list to get all my values back in the given format. Q:how to get values from this list using loop(foreach or for) in the desired format?

Seems you kinda misunderstood MVC pattern... And, please, check your formatting, so other people won't have to clean it after you. — walther, Oct 18 '14 at 21:33
You should reconsider your database design. If you have 3 fixed subjects then have a field for each. If you have variable number of subjects you should have 2 tables, one of students and one for subjects with a FK relationship to the studentID. — , Oct 18 '14 at 23:10
no actually the subjects are variable and they are generated at runtime so a fk cannot be used here. — Dragon, Oct 19 '14 at 08:46

score 1 · Answer 1 · answered Oct 18 '14 at 21:30

You will need to bind values to a view model, i.e., List<MyVM> vm on postback. Then, each view model needs to keep a state for the CRUD. It can be a simple key / value pair, like:

public class MyVM
{
    #region Properties

    #endregion

    public Dictionary<string, VMState> States;
}

public class VMState
{
    public bool Create { get; set; }
    public bool Read { get; set; }
    public bool Update { get; set; }
    public bool Delete { get; set; }
}

i have used a list to repopulate – Dragon Oct 19 '14 at 08:47 — Dragon, Oct 19 '14 at 08:47

retain values on postback in Asp.net mvc

1 Answers1