public ActionResult Index(ProductModel model)
{
if (ModelState.IsValid)
{
try
{
// process request..
// set flag
model.IsTransactionCompleted = true;
// save model state
ProductModel = model;
return RedirectToAction("Index");
}
catch (InvalidOperationException ex)
{
// add any other errors as global errors..
ModelState.AddModelError(String.Empty, ex.Message);
}
}
return View(model);
}
public ActionResult Index()
{
// retrieve model state if redirected
ProductModel model = ProductModel;
if (model == null)
{
model = new ProductModel
{
ProductId = 123456,
ProductName = "Wine",
PurchaseQuantity = 1,
};
}
return View(model);
}