You can’t add server side controls to Razor views. In general it is very bad practice to do so anyways in an ASP.NET MVC application. Due to the heritage of WebForms view engine you could violate this rule but in Razor things have been made clearer. This being said you could still do some pornography … Read more
I don’t know if this will satisfy your DRY needs, but it’s a start I think. I would rework the model a bit like this: public class Person { private const int DEFAULT_AGE = 18; private int _age = DEFAULT_AGE; [DefaultValue(DEFAULT_AGE)] public int Age { get { return _age; } set { _age = value; … Read more
I think I’ve found an answer. Buried deep in the jQuery Mobile documentation, there is information about setting the data-url on the div with data-role=”page”. When I do this, I get the nice jQuery Mobile AJAX stuff (page loading message, page transitions) AND I get the url in the browser updated correctly. Essentially, this is … Read more
You can only return one value from a function so you can’t return multiple partials from one action method. If you are trying to return two models to one view, create a view model that contains both of the models that you want to send, and make your view’s model the new ViewModel. E.g. Your … Read more
You need to put the entire ternary expression in parenthesis. Unfortunately that means you can’t use “@:”, but you could do something like this: @(deletedView ? “Deleted” : “Created by”) Razor currently supports a subset of C# expressions without using @() and unfortunately, ternary operators are not part of that set.
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