Setting a value before the submit doesn't send it to the controller

I have a view with multiples forms, each one submit should submit a hidden field with a specific value and all of the share the same model. From my controller I set the value before rendering the view, but that value I will need it for one of the "Post" methods, the others should submit the same hidden field but with a different value.

Here I am displaying just the second form of the view with the hiddenInput EventCommand

@using (Html.BeginForm("ContinueWithUpload", "Odometer", FormMethod.Post, new { id = "form2" }))
{   
    @Html.HiddenFor(m => m.EventCommand)
    <div>
        <button type="submit" name="upload-excel" value="upload-excel" id="excel-upload" class="btn btn-success">Continue Upload</button>
    </div>
}

so far I tried to set it in javascript but it doesn't work

$(function(){
    $("#excel-upload").on("click", function (e) {  
        $("#EventCommand").val("upload-excel");
    });
}

reading about how to do it, I found a solutions with the ViewData, but also with that workaround it doesn't work

@Html.HiddenFor(m => m.EventCommand)
ViewData["EventCommand"] = "upload-excel"

Any help will be appreciated

Because the html that Razor renders is the same for my HiddenInput using the same model. I put my hidden inputs in a Partial View "_HiddenFields" and before rendering it, I passed a value of ViewDataDictionary. With that it allowed me to put a restriction on the PartialView of which html I wanted to generate. Below is the idea:

@using (Html.BeginForm("ContinueWithUpload", "Odometer", FormMethod.Post, new { id = "form2" }))
{
    @Html.Partial("HiddenFields/_HiddenFields", Model, new ViewDataDictionary { { "EventCommand", "excel-upload"} })
}

and my partial view is like this

@if ((string)Html.ViewData["EventCommand"] == "excel-upload")
{
    @*@Html.HiddenFor(m => m.EventCommand)*@
    @*@Html.HiddenFor(m => m.EventCommand, new {@value = "excel-upload"})*@
    <input id="EventCommand" name="EventCommand" type="hidden" value="excel-upload" />
}
else
{
    @Html.HiddenFor(m => m.EventCommand)
}

if you see I commented the first two lines because both of them are not working even if the ViewData has the same key as the field EventCommand.