MVC4 Fallback from server to client
I am using ASP.NET MVC 4 application, I need to display messages in client, sending messages from controller to client.
I need to upload a file to the server and do some processing in a Foreach loop and after every foreach request I need to display a message in the UI. Currently I have for Loop I need to send a message from server to client in each of the loops in this case
View
@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { id = "formUpload", enctype = "multipart/form-data" }))
{
<div>
<b>Upload File</b>
<input type="file" name="file" />
<input type="submit" value="Upload File" name="btnUpload" onclick="progressStatus();"/><br />
</div>
<div>
@ViewBag.Message
</div>
<div style="width: 30%; margin: 0 auto;">
<div id="progressbar" style="width: 300px; height: 15px"></div>
<br />
</div>
}
Controller code
[HttpPost]
public ActionResult Index(HttpPostedFileBase file)
{
if (file != null)
{
var fname = Path.GetFileName(file.FileName);
var exis = Path.Combine(System.Web.HttpContext.Current.Server.MapPath("~/Storage/uploads"), fname);
if (System.IO.File.Exists(exis))
{
ViewData["Message"] = "The file " + fname + " has already exists";
}
else
{
try
{
if (file.ContentLength > 0)
{
var fileName = Path.GetFileName(file.FileName);
var folderPath = Server.MapPath("~/Storage/uploads");
fname = fileName;
var path = Path.Combine(folderPath, fileName);
var filebytes = new byte[file.ContentLength];
if (!Directory.Exists(folderPath))
Directory.CreateDirectory(folderPath);
file.SaveAs(path);
for (int i = 0; i < 20; i++)
{
//Display This Message in UI From here each time for runs like i want to show user message 1,2,3,4 etc each time for runs
}
}
ViewData["Message"] = "The file " + fname + " has uploaded successully";
}
catch (Exception e)
{
ViewData["Message"] = "The file " + fname + " Could not upload";
ViewData["Message"] = e.Message;
}
}
}
else
ViewData["Message"] = "Please choose file";
return View();
}
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