MVC :: How To Display Model Level Custom Data Annotation Validation Error
Nov 30, 2010
I am a MVC newbie & am lost in various ways validation can be implemented in my application.
I created a custom model-level data annotation validator attribute, but am unable to display its error message in the view. Basically, I have let's say 5 properties in the Entity class Job (model-level custom attribute called UniqueKeywords defined on it):
1) LoginID: value comes in the URL
2) Title: Required property level attribute defined on it
3) CatID1, CatID2, CatID3 - 3 categoryIDs - these are dropdowns in the view with same list of keywords in all 3.
I want to mandate that the values picked by the user in all 3 category dropdowns should be different.
With reference to the code pasted below, here is the explanation of what happens:
When I submit the form without specifying a title or picking anything from any of the 3 category dropdowns, the validation occurs for the property level Required attribute as well as model level uniquekeywords attribute, but the error is displayed only next to the required field "Title". I can confirm that the custom validation also works by filling in some text in the Title field & then re-posting the form...this re-displays the view, but the error message "Category cannot be duplicated" is not displayed.
I have custom class level validation attribute, inheriting from ValidationAttribute, on my model.
How come it doesn't register a key in the ModelState when its IsValid is false? I can see the the error message in the ModelState.Values collection, but the ModelState.Keys collection only shows an empty string "". Can I provide a key for it - presumably this is because its not assigned to a property?
I wanna be able to use ModelState.Remove in my controller to remove this error upon a certain condition, but I have no Key!
i'm working on a MVC3 webapp and my Model consist of many classes that use a custom type (TextRef) for textual properties. for example my Product entity looks like :
[Code]....
TextRef :
[Code]....
so in my views i'm using :
[Code]....
how could i add validation support to TextRef items ? for example making Product.Title required
I am using a model but as I want to have clean views I use the viewmodel approach which is like a downsized model which I map in my controller actions before sending to the view or getting it back in a HttpPost attributed action.
My question is: where to put the data annotation attributes. On the viewmodel classes or on the model? If I get it clearly the viewmodel annotations are used for the client side generation of validation right?
Do does that mean I have to put data annotations everywhere on both model and viewmodel?
Wanting to create custom data annotation validation. Are there any useful guides / samples on how to create them?
Firstly: StringLength with minimum and maximum length. I'm aware .NET 4 can do this, but want to do the same in .NET 3.5, if possible being able to define minimum length only (at least x chars), maximum length only (up to x chars), or both (between x and y chars).
Secondly: Validation using modulus arithmetic - if the number is a valid length, I wish to validate using the Modulus 11 algorithm (I have already implemented it in JavaScript, so I guess it would just be a simple porting?)
Update: Solved second problem, was just a case of copying over the JavaScript implementation and making a few tweaks, so don't need a solution for that.
When I click submit, It does the validation on the server side, I kinda like it to validate on the Client instead of taking a trip to the server right away.
I've got a view model that has some text properties. And I use Html.DisplayFor to display them on the screen. But those text data won't be post back, so in the case of failed validation, the returned view won't have those data. How do I handle this kind of situation?
i am creating a MVC2 application for pubs and bars. I have a model 'Opening_Time' with the following properties:
int Day,time OpeningTimetime ClosingTimeWhen adding/editing an Opening_Time, I want to validate an Opening_Time, to check the user isn't adding one for an existing Day (ie they can't have two entries for the same day).
How/Where is the best place to do this?
Preferably, I want to do it a Model level, so I can use Model.IsValid and the Html.Form helpers
I'm using ASP.NET MVC 2 and here's the issue. My View Model looks something like this. It includes some fields which are edited by the user and others which are used for display purposes. Here's a simple version
public class MyModel { public decimal Price { get; set; } // for view purpose only [Required(ErrorMessage="Name Required")]
[Code]....
But doing this, I get an error on UpdateModel(rec): The model of type 'MyModel' could not be updated.
I have to handle error related to web application. I am not sure how its works. I am thinking that I will add an error page (error.aspx) and in global.asax ,application_onError, I will redirecting the user to error page and that should be enough ! i mean it will handle error automatically.
The coding is in ASP.NET 3.5.Here is the scenario.I am modifying a page that populates some data.In that page there is a table that displays pages. The pages have sub-pages and these sub-pages again have sub-pages.So thats three levels of hierarchal data presented.Right now its populated using asp:Treeview for easier display of the +(maximise) and -(minimise) images and all.Is that the best method? What are the alternatives?
I am new to asp.net and I have a problem. When the users insert in a editor for a decimal field something other than numbers, they get an error "Field name" is not a number. But I don't want them to receive this message I want them to receive another message. I have no problem with this with required and range validators. Is there any way for me to do this?
I am not refering necessarily to changing the culture just displaying another message.
I have a razor view in ASP.NET MVC3 application.This view has 2 partialviews PartialView1 is strongly typed and binded with the model.PartialView2 is not binded with the model.and this view consists of a collection of checkboxes.As part of validation atleast one checkbox must be checked to continue with the save.
Following is the jquery code that is giving me error: Object does not support this property or method.
Error occuring at this line of code: $("#form0").validate({ rules: { issueCheckBox: { selectNone: true}} });
<asp:CustomValidator ID="QuestionValidator" runat="server" ErrorMessage="Please select an option" ClientValidationFunction="QuestionValidator_ServerValidate" OnServerValidate="QuestionValidator_ServerValidate" ValidateEmptyText="true"></asp:CustomValidator>
[code]...
When I run the page, there is no validation and no error message. Please can you point out where I am going wrong, I'm suspicious it is at Page.Master.FindControl("form1").Controls.I have previously done such validation by looping through controls via form1.controls but this is unavailable as the page uses a form passed down via the master page.
I am trying to handle the unhandled exceptions in my project.I tried with this following code in my web.config filebut it is not at all redirecting to an error page which i have created instead of that it is throwing an exception in my code itselef. How to print the error description over therein my custom error page.
If I pass in true to the ValidationSummary() helper so that it only displays model-level errors, how can I get the summary to display custom errors I add to ModelState?For instance, here is what I am after. I want my data annotation errors to display next to the textbox's using the ValidationMessage helper, but in my business layer I may throw an exception that I want to display in the validation summary.
I make use of validation with data annotations in my model classes. How do I make sure this annotations are not violated when I validate data in my business layer, before sending it to the DAL? I guess I don't want to define the validation rules in two places (model classes and in my BLL-classes)?
I use FileHelpers to import data from excel sheet to classes and then put it in MSSQL. Can somebody tell me if there is there a way to do model validation data imported from excel files?
point out an example or tutorial online that shows where data validation is done in the viewmodelas against the model? i saw a number of posts where that method is recommended..i dont really agree with it but i would like to see how it would work out..
I have a very simple web form (in relationship to a larger project) that uses a USERCONTROL for the details [re-usable]. I believed this to be a simple process - boy was I wrong. Here is my code:
[code]....
CODEBEHIND: (podcategory.aspx.cs)
[Code]....
[Code]....
USERCONTROL Codebehind: (c_podcategory.ascx.cs)
[Code]....
WHY do i get the error CS0122: 'ASP.codes_membership_c_podcategory_ascx.CategoryName' is inaccessible due to its protection level
I am a newbie in mvc3 and i'm wondering how to use attribute like [Display(Name="")] for model that comes from an entity data model that I provide im my "Model" folder in my mvc3 project.
I didn't provide a .cs class for each of my database tables .
other words, I want the controller class render a edit form for me like :
This is just a glimpse at the object model, but it's focused on the complexity of the relationships and lists. What I can't really get is what's the best way to factor my repository interfaces, given the requirements to do a unit of work. For example, to create a game, you'll need a venuedate and two participants. Does that mean the GamesController should require an IGameRepository, an IVenueDateRepository, and an IParticipant repository? Should they be rolled into one repository?
Also, what about in the consumption cases? For example, to display a signle team's schedule, you'll need all of the Participants for that Team, all of the Games for that participant, and all of the GameSegments for the participant. If those are factored into individual repositories I can't see how you can do efficient queries. Does that mean you have Repositories specifically focused on different cases? for example:
public interface IScheduleRepository { public ICollection<Game> GetScheduleForTeam(Team team); // More consumption methods } public class ScheduleRepositry : IScheduleRepository { public ScheduleRepository (ModelContext context) { // Do stuff with context } public ICollection<Game> GetScheduleForTeam(Team team) { return ( from p in context.Participants where ((p.Game.VenueDate != null) && (p.TeamId == team.Id)) orderby p.Game.VenueDate.StartTime select p.Game).ToList(); } // more consumption methods } public interface IGameRepository { public void AddGame(Game game); // More crud methods } // Not showing games repository public class GamesController : Controller { public GamesController (IGameRepository gamesRepo, IVenueDateRepository venueDateRepo, IParticipantRepository participantRepo) { // do stuff with repos here } [HttpPost] public ActionResult AddGame(Game game) { // Skipping validation logic // this? VenueDate = venueDateRepo.Add(game.VenueDate); foreach (Participant p in Game.Participants) { participantRepo.Add(p); } Game = gamesRepo.AddGame(game); // or this? // how would the game repo know to persist // the children elements? is that tight coupling? Game = gamesRepo.AddGame(game); } // more consumption methods }
My question is I don't yet understand to what degree factoring your repositories make sense based on a connected object model. I'd love to get some advice here.
How to display validation error in label control(Using Java Script)?, At the time I want to clear in particular Textbox(Which Show this error), and Remaining Textbox data Should not be cleared.
