Question

My question is similar to Engram’s here, but my question goes a bit further. The way i intend it to work is I have a textbox asking how many entries a user is going to make. After they input the number, I need to create that many more textboxes to allow for entries (and then repeat the same process with those textboxes, but baby steps first…) I tried collecting the keys on the post, but it only returns the initial textbox asking for the number of entries. I’m still trying to get a grasp on MVC and the tutorials/videos so far don’t delve this deep into it yet. Then again, I know this is probably something I could handle using JQuery, but I’d still be stuck in the same situation.

This is the controller I’m using:

[AcceptVerbsAttribute("POST")]     public ActionResult Create(int tbxNumberOfExercises)     {         ViewData["number"] = tbxNumberOfExercises;         foreach (var key in Request.Form.Keys)         {             string keyString = key.ToString();             if (keyString.StartsWith("tbox_exercise", StringComparison.OrdinalIgnoreCase))             {                 string recNum = keyString.Substring(13, keyString.Length - 13);                 string approvedKey = Request.Form["tbox_exercise" + recNum];                 int number;                 int.TryParse(approvedKey, out number);             }         }         return View("Create");     } 

And this is my aspx:

<form action="/CreateWorkout/Create" method="post"> Number of Exercises: <%= Html.TextBox("tbxNumberOfExercises") %> <br /> <br /> <input type="submit" value="Set Exercise Number" /> </form> <% if (ViewData["number"] != null)%> There are this many:<%=Html.Encode(ViewData["number"])%> <br /> and this line should show up <% if (ViewData["number"] != null)    {        int max = (int)ViewData["number"];         for (int i = 0; i < max; i++)        {%>           <br />           <br />           <%= Html.TextBox("tbox_exercise" + i) %>     <% }    } %> <% if (ViewData["s"] != null) %> <%=Html.Encode(ViewData["s"]) %> 

Is there something I’m overlooking, not comprehending, or should I quit while I’m at it because it seems like I’ll never get it?

Thanks in advance for any help — I’m just trying to learn as most I can.

Answer 1

I’d break this up in stages, you’ll need to add a ‘Save’ view someplace depending on what you want.

Scott

<form action='/Demo01/Create' method='post'> Number of Exercises: <%= Html.TextBox('tbxNumberOfExercises') %> <br /> <br /> <input type='submit' value='Set Exercise Number' /> </form> <% if (ViewData['number'] != null) {%> <form action='/Demo01/Save' method='post'> There are this many:<%=Html.Encode(ViewData['number'])%> <br /> and this line should show up <% if (ViewData['number'] != null) {        int max = (int)ViewData['number'];         for (int i = 0; i < max; i++) {%> <br /> <br /> <%= Html.TextBox('tbox_exercise' + i) %> <% }    } %> <% if (ViewData['s'] != null) %> <%=Html.Encode(ViewData['s']) %> <input type='submit' value='Save Exercises' /> <% } %> </form> 

And then in your controller something like this:

public class Demo01Controller : Controller {     public ActionResult Create() {         return View();     }      [AcceptVerbsAttribute('POST')]     public ActionResult Create(int tbxNumberOfExercises) {         ViewData['number'] = tbxNumberOfExercises;         return View('Create');     }      [AcceptVerbs(HttpVerbs.Post)]     public ActionResult Save() {         foreach (var key in Request.Form.Keys) {             string keyString = key.ToString();             if (keyString.StartsWith('tbox_exercise', StringComparison.OrdinalIgnoreCase)) {                 string recNum = keyString.Substring(13, keyString.Length - 13);                 string approvedKey = Request.Form['tbox_exercise' + recNum];                 int number;                 int.TryParse(approvedKey, out number);             }         }         return View(); // return/redirect to wherever you want     } }