Delete gallery image Dropzone.js Asp.net

I'm using Dropzone.js library, when I add a photo to the gallery it works fine, but when I try to remove the photo from the gallery it just removes the photo in my View >, but does not remove it from the folder itself.

I pass the ID and the name of the image as a parameter. The id arrives right, but the image name is null.

@foreach (var image in Model.Galeria)
{
    <div style="display: inline-block;margin-right: 15px;">
        <img src="/Images/Uploads/Produto/@Model.Produto.Id/Gallery/Thumbs/@image" />
        @Html.ActionLink("Deletar", "DeletarImagem", "Produto", new { @class = "deleteimage", data_name = image })
    </div>
}

Delete function:

    $("a.deleteimage").click(function (e) {
        e.preventDefault();

        if (!confirm("Confirm deletion")) return false;

        var $this = $(this);
        var url = "/Produto/DeletarImagem";
        var imageName = $this.data("image");

        $.post(url, { id: @Model.Produto.Id, imageName: imageName }, function(data) {
            $this.parent().fadeOut("fast");
        });

    });

My action where the id arrives correctly, but image name is arriving null:

    [HttpPost]
    public void DeletarImagem(int id, string nomeimagem)
    {
        string caminhocompleto1 = Request.MapPath("~Images/Uploads/Produto/" + id.ToString() + "/Gallery/" + nomeimagem);
        string caminhocompleto2 = Request.MapPath("~Images/Uploads/Produto/" + id.ToString() + "/Gallery/Thumbs" + nomeimagem);


        if (System.IO.File.Exists(caminhocompleto1))
            System.IO.File.Delete(caminhocompleto1);


        if (System.IO.File.Exists(caminhocompleto2))
            System.IO.File.Delete(caminhocompleto2);
    }