I Would use TempData["key"]
This is like ViewData["key"] however the data persists for the next HttpRequest and is disposed automatically by asp.net after this
So you can do this.
Controller Action
[HttpPost]
public ActionResult SomePostAction(SomeViewModel vm)
{
if(ModelState.IsValid) // Is User Input Valid?
{
try
{
CommitData();
TempData["UserMessage"] = new MessageVM() { CssClassName = "alert-sucess", Title = "Success!", Message = "Operation Done." };
return RedirectToAction("Success");
}
catch(Exception e)
{
TempData["UserMessage"] = new MessageVM() { CssClassName = "alert-error", Title = "Error!", Message = "Operation Failed." };
return RedirectToAction("Error");
}
}
return View(vm); // Return View Model with model state errors
}
_Layout.cshtml
<!DOCTYPE html>
<html>
<head>
</head>
<body>
@if(TempData["UserMessage"] != null)
{
var message = (MessageVM)TempData["UserMessage"];
<div class="alert @message.CssClassName">
<strong>@message.Title</strong>
@message.Message
</div>
}
@RenderBody()
</body>
</html>
More Info: http://www.devcurry.com/2012/05/what-is-aspnet-mvc-tempdata.html
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