Passing button value from view to controller aspnet 5

问题

I'm building a aspnet mvc6 application where I want to pass values from View to controller. My view has multiple buttons having IDs and I want to pass the ID of the button which is clicked to my controller using my viewmodel.

Controller:

public class HomeController : Controller
{
    private SampleDbContext _context;
    private HomeViewModel _viewmodel;

    public HomeController(SampleDbContext context, HomeViewModel model)
    {
        _viewmodel = model;
        _context = context;
    }

    public IActionResult Index()
    {
        _viewmodel.model = _context.MyModel.ToList();
        return View(_viewmodel);
    }

    public IActionResult Test()
    {
        var x = _viewmodel.buttonID; 
        return View();
    }
}

ViewModel:

public class HomeViewModel
    {
        public IEnumerable<MyModel> model { get; set; }
        public int buttonID { get; set; }
    }

View:

@model MyProject.ViewModels.HomeViewModel
<table>
    @foreach (var item in Model.model)
    {
        <tr>
            <td>
                 <form asp-controller="Home" asp-action="Test">
                        <button value="Add"/>
                  </form> 
            </td>
        </tr>
    }
</table>

What should be done in the view such that I can set the value of 'buttonID' of the viewmodel so that it is available in the controller?

回答1:

You can define your form as:

<form asp-controller="Home" asp-action="Test">
    <button value="Add" name="buttonName"/>
</form> 

view model:

public class HomeViewModel
{
    public IEnumerable<MyModel> model { get; set; }
    public string buttonName { get; set; }
}

and controller:

public ActionResult Test(HomeViewModel model) {
    if(model.buttonName == "Add") 
    ....
}

回答2:

You can just add an input field that will contain the data you want to send.

add this:

 <form asp-controller="Home" asp-action="Test">
   <input asp-for="buttonID" value="yourButtonID" type="hidden"/>
   <button value="Add"/>
 </form> 

来源：https://stackoverflow.com/questions/35100619/passing-button-value-from-view-to-controller-aspnet-5