modelstate

问题 Where can I find the list of errors of which make the ModelState invalid? I didn't see any errors property on the ModelState object. 回答1: About "can it be that 0 errors and IsValid == false": here's MVC source code from https://github.com/Microsoft/referencesource/blob/master/System.Web/ModelBinding/ModelStateDictionary.cs#L37-L41 public bool IsValid { get { return Values.All(modelState => modelState.Errors.Count == 0); } } Now, it looks like it can't be. Well, that's for ASP.NET MVC v1. 回答2:

问题 I want to get all the error messages out of the modelState without knowing the key values. Looping through to grab all the error messages that the ModelState contains. How can I do this? 回答1: foreach (ModelState modelState in ViewData.ModelState.Values) { foreach (ModelError error in modelState.Errors) { DoSomethingWith(error); } } See also How do I get the collection of Model State Errors in ASP.NET MVC?. 回答2: Using LINQ: IEnumerable<ModelError> allErrors = ModelState.Values.SelectMany(v =>

问题 I want to get all the error messages out of the modelState without knowing the key values. Looping through to grab all the error messages that the ModelState contains. How can I do this? 回答1: foreach (ModelState modelState in ViewData.ModelState.Values) { foreach (ModelError error in modelState.Errors) { DoSomethingWith(error); } } See also How do I get the collection of Model State Errors in ASP.NET MVC?. 回答2: Using LINQ: IEnumerable<ModelError> allErrors = ModelState.Values.SelectMany(v =>

问题 ModelState is always returning null in my unit tests. I was hoping someone could tell me why. Given the following controller: public class TestController : Controller { public ViewResult Index() { return View(); } } My test gets null for ModelState with this test: public void ModelState_Is_Not_Null() { TestController controller = new TestController(); var result = controller.Index(); // This test is failing: Assert.IsNotNull(controller.ViewData.ModelState); } If I change the controller to

问题 I am working in an ASP.NET MVC Application. I have a view model as follows: public class SampleInterestViewModel { //Properties defined //One such property that shows an error in ModelState is as follows public DateTime? SampleDate { get; set; } } From UI Perspective user can enter date as mmddyyyy. And when user enters in such format say 01012001, my ModelState.IsValid code piece in controller returns false. When I did a quick watch in ModelState, I see an error for the propery "SampleDate",

问题 I have a class in my model in MVC: public class NewModel { public bool AllComplexes { get; set; } public int UserID { get; set; } public int? RoleID { get; set; } public int ComplexID { get; set; } [Required(ErrorMessage = "Please enter a user name."), StringLength(50)] public string Username { get; set; } [Required(ErrorMessage = "Please enter Password"), StringLength(100, ErrorMessage = "Password cannot be longer than 100 characters")] public string Password { get; set; } [Compare("Password

问题 Am I the only one having this problem or I am doing it in totally wrong direction. I have a View passing DateTime value: <div class="control-group"> @Html.Label("Appointment date", null, new { @class = "control-label" }) <div class="controls"> <div class="input-append"> @Html.TextBoxFor(model => model.Appointment.Client_PreferredDate, new { @readonly = "readonly" }) <span class="add-on margin-fix"><i class="icon-th"></i></span> </div> <p class="help-block"> @Html.ValidationMessageFor(model =>

问题 I have a general question, but something that is killing me, and once explained, will help a lot. I am wondering how the models are preserved in a view. Basically, if I have three different forms on one view, and they all use the same model, but are updating different properties, do they all have the same model state when each form is submitted to its own controller action? Or, if a property of a model is not stored somewhere on page after rendering, does it get lost and not preserved? 回答1:

问题 I have this problem: I go to a page such as: /Auction/Details/37 and this calls this action method: public ActionResult Details(int id) A particular line in this method is: return View("DetailsLub", auction); This view contains this line: @Html.Action("BidOnAuction", new { auctionId = Model.Id }) Which calls this action method: public PartialViewResult BidOnAuction(int auctionId) So far so good? Now, I have a form in the BidOnAuction view, whcih has a button. When I click on this button, this

问题 This is something that has always puzzled me as to the best way round, while keeping maintainable code. The below code sets up a list of months and years for a payment gateway form, before assigning these to a variable of type List<SelectListItem> . Intial Action PayNowViewModel paymentGateway = new PayNowViewModel(); List<SelectListItem> paymentGatewayMonthsList = new List<SelectListItem>(); List<SelectListItem> paymentGatewayYearsList = new List<SelectListItem>(); for (int i = 1; i <= 12; i