MVC Help, Looping through a List<> RSS

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  bulgarian388

  Member

  22 Points

  110 Posts

  MVC Help, Looping through a List<>

  Mar 18, 2008 09:25 PM|LINK

  Hi guys,

  I have an MVC application which has a class file, just like in the sample sites. The class file has 3 properties(?). When I instantiate an instance of the class and assign the properties their values(?) it all works fine. The thing is, two of the properties are Lists and I need to loop through them at some point. In my page, I have the object available in the ViewData, but I can't seem to be able to access it's columns. I have one more property which isn't a List and it works perfectly, I just need the other ones to work like it. Any help would be appreciated! Here is the code:

  The Class: 

  using System;
  using System.Collections.Generic;
  using MyProject.Models;
  
  
  namespace MyProject.Models
  {
      public class CreateUpdateViewData
      {
          public Customer C { get; set; }
          public List CAStates { get; set; }
          public List USStates { get; set; }
      }
  }

  The Controller:

  public void Update(int? Id)
          {
              CreateUpdateViewData UpdateData = new CreateUpdateViewData();
  
              UpdateData.C = db.Customers.Single(c => c.CustomerId == Id);
              UpdateData.CAStates = (db.States.Where(s => s.Country == "CA" && s.Disabled == false)).ToList();
              UpdateData.USStates = db.States.Where(s => s.Country == "US" && s.Disabled == false).ToList();
  
              RenderView("Update", UpdateData);
          }
  

  • Moved by limno on Mar 18, 2008 10:06 PM
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  tgmdbm

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  Re: MVC Help, Looping through a List<>

  Mar 19, 2008 12:25 AM|LINK

   did you mean List<State> instead of just List?
  

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  pure.krome

  Member

  532 Points

  349 Posts

  Re: MVC Help, Looping through a List<>

  Mar 19, 2008 01:32 AM|LINK

  tgdbm is right.

  u need to do the following

  1) Refactor the CreateUpdateViewData to the following:

  public class CreateUpdateViewData
  8        {
  9            public Customer C { get; set; }
  10           public List<State> CAStates { get; set; }
  11           public List<State> USStates { get; set; }
  12       }
  

  2) The controller code for the UPDATE method should be fine and doesn't need to be changed..

  3) Iterate through u're stuff on in the view, like (and i'm assuming the view is Typed to a CreateUpdateViewData class...):

  <%

  if (this.ViewData != null)
  {
      foreach(State state in this.ViewData.CAStates)
      {
          // Render some html .. like
          // Response.Write("Name: " + state.Name + ".<br/>");
      }
  }

  %>

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