How to reload part of main view after submit using ajax - ajax

Question

I'm new to MVC. How can I refresh part of my main view after submit action in one of my partial views. I'm trying to make adding comments. I didn't use ajax until now so any help is good. I want after I create new comment in PartialView "Create" that it appers in PartialView GetCommentsByTicket...I hope that this is enough explanation...
#model HelpDeskApp.Models.Ticket
#{
ViewBag.Title = "Details";
}
#*<h2>Details</h2>*#
<div class="panel panel-green">
<div class="panel-heading">
Ticket
</div>
<div class="panel-body">
<div>
#*<h4>ticket</h4>
<hr />*#
<dl class="dl-horizontal">
<dt>
#Html.DisplayNameFor(model => model.TicketId)
</dt>
<dd>
#Html.DisplayFor(model => model.TicketId)
</dd>
<dt>
#Html.DisplayNameFor(model => model.Subject)
</dt>
<dd>
#Html.DisplayFor(model => model.Subject)
</dd>
<dt>
#Html.DisplayNameFor(model => model.Description)
</dt>
<dd>
#Html.DisplayFor(model => model.Description)
</dd>
<dt>
#Html.DisplayNameFor(model => model.AddedDate)
</dt>
<dd>
#Html.DisplayFor(model => model.AddedDate)
</dd>
<dt>
#Html.DisplayNameFor(model => model.Category1.Name)
</dt>
<dd>
#Html.DisplayFor(model => model.Category1.Name)
</dd>
<dt>
#Html.DisplayNameFor(model => model.Priority1.Name)
</dt>
<dd>
#Html.DisplayFor(model => model.Priority1.Name)
</dd>
<dt>
#Html.DisplayNameFor(model => model.Status1.Name)
</dt>
<dd>
#Html.DisplayFor(model => model.Status1.Name)
</dd>
<dt>
#Html.DisplayNameFor(model => model.User.FirstName)
</dt>
<dd>
#Html.DisplayFor(model => model.User.FirstName)
</dd>
</dl>
</div>
<p>
#*#Html.ActionLink("Edit", "Edit", new { id = Model.TicketId }) |*#
#Html.ActionLink("Back to List", "Index")
</p>
<div id="postcomments">
<hr />
<h4>Komentari</h4>
#{ Html.RenderAction("CommentsByTicket", "Comments", new { ticketId = Model.TicketId });}
</div>
<div id="create comments">
#{ Html.RenderAction("Create", "Comments", new { Ticket = Model.TicketId });}
</div>
</div>
</div>
<div class="panel-footer">
Panel Footer
</div>
</div>