Question

The button name is not being passed to my action method.

Here is my view (simplified):

@using (Html.BeginForm("HandleSubmit", "Home", FormMethod.Post))
{    
    <input id="btnAddLineItem" type="submit" name="AddLineItem" value="AddLineItem" />
}

Here’s the controller method:

[HttpPost, ActionName("HandleSubmit")]
public ActionResult HandleSubmit(int? id, string btnSubmit)
{
    switch (btnSubmit)
    {
        case "AddLineItem":
            break;
        case "AddNewOrder":
            break;
    }

    return View("OrderDetails");
}

The btnSubmit value is always null. What do I need to do differently?

Answer 1

The name is what gets bound to your method signature, not the id.

Use the following:

public ActionResult HandleSubmit(string AddLineItem, string AddNewOrder)
{
    /* ... code ... */

    if(!string.IsNullOrEmpty(AddLineItem)) {

    }
    else if(!string.IsNullOrEmpty(AddNewOrder)) {

    }

    /* ... code ... */
}

Remember the form post will send a multipart/form-data collection of name/value pairs to the server.