How do you handle the output of a dynamically generated form in ASP.NET MVC?

Question

Say you create a form using ASP.NET MVC that has a dynamic number of form elements.

For instance, you need a checkbox for each product, and the number of products ch

Answer 1

Just give each checkbox a unique name value:

" 
 name="<%= "approveCheck" + recordId %>" type="checkbox" />

Then parse the list of form values in the Action, after submit:

foreach (var key in Request.Form.Keys)
    {
        string keyString = key.ToString();
        if (keyString.StartsWith("approveCheck", StringComparison.OrdinalIgnoreCase))
        {
            string recNum = keyString.Substring(12, keyString.Length - 12);

            string approvedKey = Request.Form["approveCheck" + recNum];
            bool approved = !String.IsNullOrEmpty(approvedKey);
            // ...

You don't need to pass form values as arguments; you can just get them from Request.Form.

One other option: write a model binder to change the list into a custom type for form submission.