Bootstrap modal is not appearing when on form save using ASP.NET MVC

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Hello everyone,

I am quite new to asp.net mvc, I am trying to display a bootstrap modal after I save the data. but its not showing modal or the modal disappears in a blink.
please see my code

thanks for the help in advance.

What I have tried:

controller action:

C#

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult AddNew(ProductModel pm)
{
 
    if (ModelState.IsValid)
    {                
        int result = IProductRep.Add(pm);
        if (result <= 0)
        {

            return HttpNotFound();
        }
        else
        {
            ViewBag.Saved = "saved";
       
        }
    }
   
    return View();
}

view : (button is in the form with form method post)

HTML

<input type="submit" class="btn btn-primary float-right shadow" value="Save"  data-toggle="modal" data-target="#exampleModal">

Razor

@if (ViewBag.Saved != null)
{
    <div class="modal fade" id="exampleModal">
        <div class="modal-dialog modal-dialog-centered">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                    
                        <span>×</span>
                    
                </div>
                <div class="modal-body">
                    New product has been saved successfully.
                </div>
                <div class="modal-footer">
                    Close
                    Save changes
                </div>
            </div>
        </div>
    </div>
}

Posted 13-Mar-21 23:28pm

chan200uk

Updated 1-May-23 0:22am

Richard Deeming

v3

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Richard Deeming · Accepted Answer · 2021-03-15T02:52:00

Bootstrap modals don't magically appear on their own. They are shown when you trigger them, either by clicking an element in the current page, or via Javascript.

Modal · Bootstrap v4.6[^]

You need to add some script to your page to display the modal dialog when the document loads.

Razor

@section Scripts {
    @if (ViewBag.Saved != null)
    {
        <script>
        $(function(){
            $("#exampleModal").modal("show");
        });
        </script>
    }
}