C# MVC form does not send data back to controller-CodePudding

I know it must be something stupid, but I cant seem to figure this out. I have the following in a view:

 @using (@Html.BeginForm("ReceiveForm1", "Home", FormMethod.Post))
 {
     <div >
         <label for="organizationID">Organization ID</label>
         <input type="number"  asp-for="organizationID" aria-describedby="emailHelp" placeholder="Enter Organization ID">
     </div>
     <div >
         <label for="externalPersonalID">External Personal ID</label>
         <input type="number"  asp-for="externalPersonalID" placeholder="Enter External Personal ID">
     </div>
     <div >
          <label for="phoneNumber">Phone Number</label>
          <input type="number"  id="phoneNumber" asp-for="phoneNumber" placeholder="Password">
     </div>
     <button type="submit" >Submit</button>
 }

And I have the following code in my controller:

    [HttpPost]
    public ActionResult ReceiveForm1(FormCollection collection)
    {
        IEnumerable<Form1Return> personData = GetPersonInformation(collection);
        return View(personData);
    }

When I run the code, and enter data into the form, and click the submit button, I run to a breakpoint set on call to GetPersonInformation. When I do a watch on collection, there are no elements. So for some reason, the form data is not making it to the controller. Any idea why?

Thanks.

CodePudding user response：

The 'Microsoft.AspNetCore.Mvc.ModelBinding.Binders.FormCollectionModelBinder' cannot bind to a model of type 'Microsoft.AspNetCore.Http.FormCollection'. Change the model type to 'Microsoft.AspNetCore.Http.IFormCollection' instead.

Please try this:

    [HttpPost]
    public ActionResult ReceiveForm1(IFormCollection collection)
    {
        IEnumerable<Form1Return> personData = GetPersonInformation(collection);
        return View(personData);
    }

CodePudding user response：

I've seen this happen when input's don't have their name attribute set. The relevant section on W3Schools has this nugget which confirms this is likely the case.

Note: Only form elements with a name attribute will have their values passed when submitting a form.