在我的控制器的操作中,我有以下代码:
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();
}
更新:
if (String.IsNullOrEmpty(id))
{
// add error
ModelState.AddModelError("GridActionDropDownList", "Please select an option");
return RedirectToAction("Orders");
}
更新2:
下面是我更新的代码:
@Html.DropDownListFor(x => x.SelectedGridAction, Model.GridActions,"Please Select")
@Html.ValidationMessageFor(x => x.SelectedGridAction)
该模型如下所示:
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;
}
}
}
下面是我的控制器操作:
public ActionResult GridAction(string id)
{
if (String.IsNullOrEmpty(id))
{
// add error
ModelState.AddModelError("SelectedGridAction", "Please select an option");
return RedirectToAction("Orders");
}
return View();
}
什么都没发生!我对这件事完全迷惑了!
更新3:
我现在使用以下代码,但验证仍未触发:
public ActionResult GridAction(string id)
{
var myViewModel= new MyViewModel();
myViewModel.SelectedGridAction = id; // id is passed as null
if (!ModelState.IsValid)
{
return View("Orders");
}
更新4:
$("#linkGridAction").click(function () {
alert('link grid action clicked');
$.get('GridAction/', { SelectedGridAction: $("#SelectedGridAction").val() }, function (result) {
alert('success');
});
});
控制器如下所示:
// OrderViewModel has a property called SelectedGridAction.
public ActionResult GridAction(OrderViewModel orderViewModel)
{
return View();
}
更新5:验证没有触发:
public ActionResult GridAction(OrderViewModel orderViewModel)
{
if (!ModelState.IsValid)
{
return View("Orders", orderViewModel);
}
return View();
}
https://stackoverflow.com/questions/4681328
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