如何在验证集合asp.net mvc中添加验证错误？
如何在验证集合asp.net mvc中添加验证错误？
提问于 2011-01-13 22:47:40
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();
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/4681328
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