CODEWITHSUNDEEP
asp.net-mvc-3
Rekha Jayaram
Rekha Jayaram

Reputation: 131

MVC3 Model Binding and GET Request

I have a simple html form, and a model corresponding to the form based on the default binder. The HTTPPOST works fine and gets me all the form values into the model on a submit of the form. However I expected the HTTP GET to display the form with the Username defaulted to Hello. But the view displays a blank form. Could someone kindly explain to me why the default model binder is not able to push the values out to the form on a GET request, but is able to get the values from my form into the model on a POST request. Thanks.

-----CONTROLLER -----

[HttpPost]
    public ActionResult Index(SimpleFormModel application)
    {
        return View(application);
    }
[HttpGet]
    public ActionResult Index ()
    {
        ViewBag.Message = "Welcome to ASP.NET MVC!";
        SimpleFormModel simplefm = new SimpleFormModel();
        simplefm.UserName = "Hello";
        return View(simplefm);
    }

---MODEL ---

public class SimpleFormModel
{
    public string UserName { get; set; }
    public string Dob { get; set; }
    public string Email { get; set; }

}

--------VIEW--------------------------

@model MVC3MobileApplication.Models.SimpleFormModel
@{
ViewBag.Title = "Home Page";
}

<h2>@ViewBag.Message</h2>
<p>
    To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>.
</p>


<form action="">
<fieldset>
<legend>Personal information:</legend>
Name: <input type="text" size="30" name="SimpleFormModel.UserName" /><br />
E-mail: <input type="text" size="30" name ="SimpleFormModel.Email"/><br />
Date of birth: <input type="text" size="10" name ="SimpleFormModel.Dob"/>
</fieldset>
</form>

Upvotes: 0

Views: 846

Answers (2)

Marc
Marc

Reputation: 6771

Replace your HTML Textbox with this:

@Html.TextBoxFor(m=>m.UserName)

Otherwise .net is unable to fill the value of the field...

Upvotes: 1

Darin Dimitrov
Darin Dimitrov

Reputation: 1038730

You need to use HTML helpers to generate your input fields instead of hardcoding them as you did:

@model MVC3MobileApplication.Models.SimpleFormModel

@{
    ViewBag.Title = "Home Page";
}

<h2>@ViewBag.Message</h2>

@using (Html.BeginForm())
{
    <fieldset>
        <legend>Personal information:</legend>
        Name: @Html.TextBoxFor(x => x.UserName, new { size = "30" })
        <br />
        E-mail: @Html.TextBoxFor(x => x.Email, new { size = "30" })
        <br />
        Date of birth: @Html.TextBoxFor(x => x.Dob, new { size = "10" })
    </fieldset>

    <button type="submit">OK</button>
}

The HTML helpers will use the model values to generate the corresponding input fields and populate them.

Upvotes: 1

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