Update ViewBag value on button click

Question

Dear Friends, I am trying to update the value in ViewBage.ItemList after buttonclick, but not finding it possible. Can anyone help me whether it is really possible or not. Scenario: Items of ViewBag.ItemList are displayed on pageload, then action of submit button changes one of values, as it is updated in DB. But, since my code doesnt calls for a page refresh, so the ViewBag.ItemList keeps displaying the same value. I am working through Angular scripts. Please help me on the topic, anyone.

Tamal Marick · Answer

Hi Sandhya, According to your need, I think JQuery Ajax can work for you. It can implement partial refreshing rather than page reload. I made a sample, you can take it as a reference. You can pass ViewBage.ItemList through success: function (data). View: @Html.DropDownList("drop1",ViewBag.data1 as IEnumerable ) @Html.TextBox("tb1") @Html.DropDownList("drop2", ViewBag.data2 as IEnumerable ) $("#drop2").change(function () { $.ajax({ method:'POST', url: '/Home/RefreshDiv2', data: { drop2: $("#drop2").val() }, // Pass value that you want to controller. success: function (data) { $("#ib2").val(data); //Implement partial refreshing. } }) }) Controller: public ActionResult Index() { var data1 = new List { new SelectListItem{Text="1",Value="A" }, new SelectListItem{Text="2",Value="B" }, new SelectListItem{Text="3",Value="C" }, new SelectListItem{Text="4",Value="D" } }; var data2 = new List { new SelectListItem{Text="a",Value="Aa" }, new SelectListItem{Text="b",Value="Bb" }, new SelectListItem{Text="c",Value="Cc" }, new SelectListItem{Text="d",Value="Dd" } }; ViewBag.drop1 = data1; ViewBag.drop2 = data2; return View(); } public ActionResult RefreshDiv2(string drop2/*Accept the data which is passed by ajax.*/) { //Handler the data which is passed from view. return Json(drop2); //Send the data back to view. }

Sandhya Kumari · Answer

Thanks a lot Tamal Marick. I implemented Partial Refresh as suggested for updating the value in ViewBag, though I updated it a little bit, I passed the entire ViewBag.ItemList in as a model object in the controller. So on the eventchange, everytime the value was updated and passed to the .cshtml file. Great Help ! :) :)

Sivakumar Koneti · Answer

follow this link https://stackoverflow.com/questions/35987832/viewbag-changes-value-in-onclick