填充表单中动态的基础上在ASP.Net MVC用户输入 [英] Populating a form dynamically based on user input in ASP.Net MVC

问题描述

我的问题是相似的印迹的<一个href=\"http://stackoverflow.com/questions/223149/how-do-you-handle-the-output-of-a-dynamically-generated-form-in-aspnet-mvc\">here,但我的问题去远一点。我打算它的工作方式是我有一个文本框，询问用户是多少条目要作。他们输入号码后，我需要创建更多的文本框，允许条目（然后这些文本框重复同样的过程，但宝宝第一步骤...）我试图收集后的按键，但它只返回初始文本询问条目的数量。我还在试图让MVC和教程的把握/视频到目前为止不钻研这种深入到它。再说，我知道这可能是我的东西可以处理使用JQuery，但我还是会停留在同样的情况。

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.

这是我使用的控制器：

[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");
    }

这是我的aspx：

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"]) %>

有我俯瞰，不是COM prehending的东西，或者我应该退出，而我在这，因为它好像我永远不会得到它？

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?

在此先感谢您的帮助 - 我只是努力学习，因为大多数我可以

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

推荐答案

我在阶段打破了这个，你就需要添加一个保存视图某处取决于你想要什么。

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

斯科特

<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>

然后在你的控制器是这样的：

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
    }
}

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