If you’re on MVC3/.NET4, you can use IValidatableObject which exists specifically for such purposes. Quoting ScottGu, …The IValidatableObject interface enables you to perform model-level validation, and enables you to provide validation error messages specific to the state of the overall model…. You model would look like public class MyViewModel : IValidatableObject { public long? Id … Read more
Because encoded characters are HTML, and the Raw version of that string is the encoded one. Html.Raw renders what it is given without doing any html encoding, so with ViewBag.div = “<div> Hello </div>”;: @Html.Raw(ViewBag.div); Renders <div> Hello </div> However, when you have encoded characters in there, such as ViewBag.Something = “>”; the raw version … Read more
This is now moved from Futures into MVC3. There’s a ControllerSessionState attribute (apparently will be named SessionState for the final release of MVC3), which can be applied to a controller, something like this: [SessionState(SessionStateBehavior.Disabled)] public class MyController : Controller { … (But in the RC version, you must use ControllerSessionState
This should do it: routes.MapRoute( name: “About”, url: “About”, defaults: new { controller = “Public”, action = “About” } ); routes.MapRoute( name: “MyPageSummary”, url: “MyPage”, defaults: new { controller = “MyPage”, action = “Summary” } ); routes.MapRoute( name: “Default”, url: “{controller}/{action}/{id}”, defaults: new { controller = “Public”, action = “Start”, id = UrlParameter.Optional } );
Create a modelbinder, override BindModel, check the type and do what you need to do public class MyModelBinder : DefaultModelBinder { public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) { if (HasGenericTypeBase(bindingContext.ModelType, typeof(MyType<>)) { // do your thing } return base.BindModel(controllerContext, bindingContext); } } Set your model binder to the default in the global.asax protected void … Read more
I actually ended up implementing a custom ValidationAttribute to solve this, using the same type of logic presented in CompareAttribute that allows you to use reflection to evaluate the values of other properties. This allowed me to implement this at the property level instead of the model level and also allows for client side validation … Read more
You could define a view model: public class AddUserViewModel { public int ProjectId { get; set; } public int[] userAccountIds { get; set; } } then adapt your controller action to take this view model as parameter: [HttpPost] public ActionResult AddUsers(AddUserViewModel model) { … } and finally invoke it: function sendForm(projectId, target) { $.ajax({ url: … Read more
First, you’ll still probably want to return a view from your action, so returning an EmptyResult isn’t the best; but you’ll figure that out when you’re dealing with the page flow in your registration process. I’m assuming that you wish to create an HTML email using a View you have already created. That means you … Read more
Note: This answer was written in 2011 and looking at it nowadays, it’s more of a hack. It’s better to load values through AJAX request that hits a JSON endpoint API. Here’s a practical case: I have a GlobalSettings static C# class that contains static Properties of values that are used through the whole system … Read more
If you were using DropDownListFor like this: @Html.DropDownListFor(m => m.SelectedItemId, Model.MySelectList) where MySelectList in the model was a property of type SelectList, this error could be thrown if the property was null. Avoid this by simply initializing it in constructor, like this: public MyModel() { MySelectList = new SelectList(new List<string>()); // empty list of anything… … Read more