How to add validation errors in the validation collection asp.net mvc?
- by johndoe
Inside my controller's action I have the following code:
public ActionResult GridAction(string id)
{
if (String.IsNullOrEmpty(id)) {
// add errors to the errors collection and then return the view saying that you cannot select the dropdownlist value with the "Please Select" option
}
return View();
UPDATE:
if (String.IsNullOrEmpty(id))
{
// add error
ModelState.AddModelError("GridActionDropDownList", "Please select an option");
return RedirectToAction("Orders");
}
}
UPDATE 2:
Here is my updated code:
@Html.DropDownListFor(x => x.SelectedGridAction, Model.GridActions,"Please Select")
@Html.ValidationMessageFor(x => x.SelectedGridAction)
The Model looks like the following:
public class MyInvoicesViewModel
{
private List<SelectListItem> _gridActions;
public int CurrentGridAction { get; set; }
[Required(ErrorMessage = "Please select an option")]
public string SelectedGridAction { get; set; }
public List<SelectListItem> GridActions
{
get {
_gridActions = new List<SelectListItem>();
_gridActions.Add(new SelectListItem() { Text = "Export to Excel", Value = "1"});
return _gridActions;
}
}
}
And here is my controller action:
public ActionResult GridAction(string id)
{
if (String.IsNullOrEmpty(id))
{
// add error
ModelState.AddModelError("SelectedGridAction", "Please select an option");
return RedirectToAction("Orders");
}
return View();
}
Nothing happens! I am totally lost on this one!
UPDATE 3:
I am now using the following code but still the validation is not firing:
public ActionResult GridAction(string id)
{
var myViewModel= new MyViewModel();
myViewModel.SelectedGridAction = id; // id is passed as null
if (!ModelState.IsValid)
{
return View("Orders");
}
