I want to return error message in same page in mvc

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i have a controller that returns a message but this msg show in new blank page .i want to show this msg in the same page anyone can help me..
my code is

controller is

[HttpPost]
public ActionResult NewsLetter(NewsLetterModel model)
{
try
{
string msg = "";
string res = "";

if (ModelState.IsValid)
{
kebhariBlogsEntities objEntity = new kebhariBlogsEntities();
if (model.Choice == 0)
{
res = User_Role_BL.Newsletter(model.Email, 0, model.Option, 0, 0);
msg = res;
}
else if (model.Choice == 1)
{
res = User_Role_BL.Newsletter(model.Email, 1, model.Option, 0, 0);

msg = res;
}
else
{
msg = "error";
}
}
else
{
msg = "Invalid Email";
}
return Json(msg, JsonRequestBehavior.AllowGet);
}
catch (Exception ex)
{
ErrorViewModel errorModel = new ErrorViewModel();
errorModel.ErrorDetails = ex.Message;
errorModel.ReturnUrl = Url.Action("Common", "NewsLetter");
return RedirectToAction("ErrorList", "Error", errorModel);
}
}

and my view page is

@model KebhariBlog.Models.CommonModel.NewsLetterModel

@* <script type="text/javascript" src="@Url.Content("~/Content//js/jquery-1.4.2.min.js")"></script>*@
@* <script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.min.js")" type="text/javascript"></script>*@
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@using (Ajax.BeginForm("NewsLetter", "Common", new AjaxOptions { UpdateTargetId = "updateNews", OnBegin = "showLoader();", OnComplete = "hideLoader();" }))
{

@Html.TextBoxFor(m => m.Email, new { @class="blog_search", @Value="" ,Placeholder="Enter Your Mail Id..." ,@style="background: none;font-size: 12px;width: 95%;border: 1px solid #CCC;",})
@Html.ValidationMessageFor(m => m.Email)

<img src="@Url.Content("~/Content/images/ajax-loader (1).gif")" id="loaderImg" style="display:none;" />
}
<script type="text/javascript">

function showLoader() {
document.getElementById('loaderImg').style.display = 'block';
}
function hideLoader() {
document.getElementById('loaderImg').style.display = 'none';
}
function validate() {
var email = document.getElementById('Email');
var emailPattern = /^[a-zA-Z0-9._-]+@@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
if (email.value == '' || !emailPattern.test(email.value)) {
document.getElementById('updateNews').innerHTML = 'Invalid Email';
return false;
}
else{
document.getElementById('updateNews').innerHTML = '';
}
}
</script>

Posted 19-Feb-14 23:37pm

Member 10266652

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V5709 · Answer 1 · 2014-02-20T00:52:00

use 'Viewbag' element.Assign it message which you want to show & then place fallowing code in your view.

JavaScript

@if (!string.IsNullOrEmpty(ViewBag.AlertMessage))
      {
       <script type="text/javascript">
           alert("@ViewBag.AlertMessage");
           ViewBag.AlertMessage = "";
       </script>
   }