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POWiring up any UI to my application
 

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    <p>At present, I have very successfully architected my applications as follows:</p> <ul> <li><p>Data model (Entity Framework 4.1)</p></li> <li><p>Validation using Enterprise Library 5.0 Validation Application Block.</p></li> <li><p>Object Context managed by a reusable class library.</p></li> </ul> <p>So, the UI is pretty light on code but I know I'm not completely there yet.</p> <p><strong>If I wanted to have my projects set up so I could implement a Web Forms, MVC, WPF Desktop or Silverlight - even Windows Phone 7 - application, what additional steps might I need to take?</strong></p> <p>Here's some code, deliberately simplified, to illustrate my current state of play (I've omitted Code Contracts and the class libraries):</p> <p>(Currently EF4 Model First and ASP .Net Web Forms)</p> <p><strong>Partial class for auto-generated entity</strong></p> <pre><code>namespace MyNamespace.Database { using Microsoft.Practices.EnterpriseLibrary.Validation; using Microsoft.Practices.EnterpriseLibrary.Validation.Validators; [HasSelfValidation] public partial class MyEntity : IMyEntity { [SelfValidation] public void Validate(ValidationResults validationResults) { // Custom validation can go here, just add a new ValidationResult // to validationResults if the rule fails. if (validationResults != null) { validationResults.AddAllResults( ValidationFactory .CreateValidator&lt;IMyEntity&gt;() .Validate(this)); } } } } </code></pre> <p><strong>Validation</strong></p> <pre><code>namespace MyNamespace.Database { using System.ComponentModel.DataAnnotations; using System.Diagnostics.Contracts; using Microsoft.Practices.EnterpriseLibrary.Validation; using Microsoft.Practices.EnterpriseLibrary.Validation.Validators; [ContractClass(typeof(MyEntityContract))] public interface IMyEntity { int Id { get; set; } [Required] [NotNullValidator] [StringLengthValidator(0, RangeBoundaryType.Ignore, 50, RangeBoundaryType.Inclusive, MessageTemplate = "MyEntity Name must be 50 characters or less.")] string Name { get; set; } void Validate(ValidationResults validationResults); } } </code></pre> <p><strong>Facade for data access</strong></p> <pre><code>namespace MyNamespace.Facade { using System.Collections.Generic; using System.Linq; using Common.ObjectContextManagement; using Database; public sealed class MyEntityFacade : FacadeBase&lt;MyEntities, MyEntity&gt; { public IEnumerable&lt;MyEntity&gt; GetAll() { return this.ObjectContext.MyEntitys .Distinct() .ToList(); } } } </code></pre> <p><strong>Web App UI</strong></p> <pre><code>using (new UnitOfWorkScope(false)) { this.MyEntityList.DataSource = new MyEntityFacade().GetAll(); this.MyEntityList.DataBind(); } // Or... using (var scope = new UnitOfWorkScope(false)) { var myEntityFacade = new MyEntityFacade(); var myEntity = new MyEntity(); PopulateEntity(myEntity); // Validation errors are automatically presented // to the user from the Validate method if (Validate(myEntity)) { try { myEntityFacade.Add(myEntity); scope.SaveAllChanges(); } catch (Exception exception) { Logging.Write("Error", LoggingLevel.Error, exception.Message); } } } </code></pre> <p>How close am I?</p>
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