ASP.NET MVC 4 : form input value is always null on Submit

Question

I am trying to build simnple search utility searching my Employees by last Name.

Here is my Razor View

    @using(Html.BeginForm("Index","Employee", FormMethod.Post))
{
    <p>
        Search employees by Last Name : @Html.TextBox("SearchString")
        <input type="submit" value="Submit" name="Search" />     
    </p>
}

Here is my Controller

        // GET: /Employee/
    public ActionResult Index(string lastName)
    {
        var employees = db.Employees;
        if (!String.IsNullOrEmpty(lastName))
        {
            employees = employees.Where(p => p.LastName.ToUpper().Contains(lastName.ToUpper()));
        }            
        return View(employees.ToList());
    }

Debugging shows the Submit button posting back to the index method, but the value lastName returned to the Index method is always null. How can I pass the lastName correctly?

Thanks, the example here : asp.net/mvc/tutorials/getting-started-with-ef-using-mvc/… turned out to be incorrect then. — Ash Machine
– Ash Machine, Commented Mar 14, 2013 at 18:02

rox · Accepted Answer · 2017-02-16 21:50:55Z

3

your @Html.TextBox("SearchString") name and action method parameter name must match. (SearchString)

[HttpPost]
public ActionResult Index(string SearchString)
{
    var employees = db.Employees;
    if (!String.IsNullOrEmpty(SearchString))
    {
        employees = employees.Where(p => p.LastName.ToUpper().Contains(SearchString.ToUpper()));
    }            
    return View(employees.ToList());
}

edited Feb 16, 2017 at 21:50

rox

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answered Mar 14, 2013 at 17:45

AliRıza Adıyahşi

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Comments

Serj Sagan · Accepted Answer · 2013-03-14 17:44:51Z

0

You must name the variable in your ActionResult the same as the field name so in your example, either set the TextBox value to lastName or name the variable in the ActionResult Index to SearchString

answered Mar 14, 2013 at 17:44

Serj Sagan

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