File upload partial view in a popup asp.net mvc - asp.net-mvc

Question

I have a file upload control in a partial view(_Managefiles),
#model Framework.Views.FileUpload
...
#{
var grid = new WebGrid(Model.UploadFileList, ...);}
<div id="gridContent">
#grid.GetHtml(tableStyle: "webGrid",...)
#using (Html.BeginForm("UploadFiles", "PartialVw", FormMethod.Post,
new { enctype = "multipart/form-data", Id = "frmManageFiles", UpdateTargetId = "Grd" }))
{
..
<input id="uploadFile" name="uploadFile" type="file" />
<input type="button" id="btnSubmit" value="Upload File" onclick="javascript:StoreFormData()" />
}
this partial view is within a popup in a view(Expense.cshtml),
#model Framework.Views.Expenses
...
<div id="FileUploadModal" title="Upload File" style="display: none; overflow: auto;">
#Html.Partial("../Shared/_ManageFiles", Framework.Views.FileUpload.Current)
</div>
on click of web grid row item link in the view, upload popup is displayed and file is uploaded on upload click button below is the controller event
[HttpPost]
public ActionResult UploadFiles(FormCollection form)
{
HttpPostedFileBase File = Request.Files["uploadFile"];
...
File.SaveAs(FileUpload.Current.UploadFolderPath);
return View("../Expenses/Expenses", Expenses.Current);
}
After each upload the popup disappears, it should persist after download. I'm thinking of using ViewData for this, is there any workaround for popup to persist?
I dont want to use any upload controls like uploadify, blueimp. I want to keep it simple.

Answer 1

Instead of a partial view i created a normal view for the upload control and on click of web grid row item link, a new window is opened and in this way only the newly opened window will be refreshed on upload
function UploadExpenseFile(e) {
var l = (screen.width - 500) / 2;
var t = (screen.height - 500) / 2;
var f = window.open("#Url.Action("ManageFiles", "Tools", new { itemid = "_id" })".replace("_id",e), "_blank", 'resizable=0, height=500px,width=500px,top=' + t + ',left=' + l + 'w');
}