I have found that while my domain model gets me 85% of the way to having the fields I want, it has never covered 100% of the values I want on my view. Especially when it comes to permissions and whether or not a user should have access to certain portions of the view. The … Read more
All you need is: @Html.Raw(yourEncodedHtmlFromYouDatabase) I’m assuming that the html in the database has been properly sanitized (or at least from a reliable source), because if not, you could be opening yourself up to cross-site scripting attacks. The reason your approach didn’t work is that Razor HTML-encodes output by default (every time you use @ … Read more
One possibility is to write a custom validation attribute: public class RequiredIfOtherFieldIsNullAttribute : ValidationAttribute, IClientValidatable { private readonly string _otherProperty; public RequiredIfOtherFieldIsNullAttribute(string otherProperty) { _otherProperty = otherProperty; } protected override ValidationResult IsValid(object value, ValidationContext validationContext) { var property = validationContext.ObjectType.GetProperty(_otherProperty); if (property == null) { return new ValidationResult(string.Format( CultureInfo.CurrentCulture, “Unknown property {0}”, new[] { _otherProperty … Read more
Since System.ComponentModel.DataAnnotations.FileExtensionsAttribute is sealed. I use a wrapper for MVC 4. public class HttpPostedFileExtensionsAttribute : DataTypeAttribute, IClientValidatable { private readonly FileExtensionsAttribute _innerAttribute = new FileExtensionsAttribute(); /// <summary> /// Initializes a new instance of the <see cref=”HttpPostedFileExtensionsAttribute” /> class. /// </summary> public HttpPostedFileExtensionsAttribute() : base(DataType.Upload) { ErrorMessage = _innerAttribute.ErrorMessage; } /// <summary> /// Gets or sets … Read more
The reason why this doesn’t work is because of a limitation of the DropDownListFor helper: it is able to infer the selected value using the lambda expression passed as first argument only if this lambda expression is a simple property access expression. For example this doesn’t work with array indexer access expressions which is your … Read more
When should I use View Models? Is it not recommended to use the domain? I find that my view models are copies of my domain objects, and don’t see the value… View models should always be used. You should not use your domain models in the view. View models are not exact copies of the … Read more
After stepping into asp.net mvc’s source code, it seemsd the problem is that for the conversion asp.net mvc uses the framework’s type converter, which for some reason returns false for an int to decimal conversion, I ended up using a custom model binder provider and model binder for decimals, you can see it here: public … Read more
Because now you are serving your views from some unknown location there is no longer the ~/Views/web.config file which applies and indicates the base class for your razor views (<pages pageBaseType=”System.Web.Mvc.WebViewPage”>). So you could add an @inherits directive at the top of each embedded view to indicate the base class. @inherits System.Web.Mvc.WebViewPage @model …
Sounds like you’re missing the following in the Web.Config in the views folder: /Views/Web.Config <?xml version=”1.0″?> <configuration> <system.web.webPages.razor> <host factoryType=”System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35″ /> <pages pageBaseType=”System.Web.Mvc.WebViewPage”> // <– this line and contents are important <namespaces> <add namespace=”System.Web.Mvc” /> <add namespace=”System.Web.Mvc.Ajax” /> <add namespace=”System.Web.Mvc.Html” /> <add namespace=”System.Web.Routing” /> </namespaces> </pages> </system.web.webPages.razor> Views typically derive from … Read more
As far as receiving a JSON string and binding it to a model is concerned the JsonValueProviderFactory does this job out of the box in ASP.NET MVC 3. But there is nothing built-in for outputting JSONP. You could write a custom JsonpResult: public class JsonpResult : JsonResult { public override void ExecuteResult(ControllerContext context) { if … Read more