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Indy Tech Fest 2008 - ASP.NET MVC
- 1. Web Development with ASP.NET MVC Aaron Lerch Development Team Lead Interactive Intelligence
- 2. • The MVC Pattern • MVC in ASP.NET • Testability • AJAX
- 3. The MVC Pattern VIEW CONTROLLER MODEL
- 4. The MVC Pattern VIEW CONTROLLER MODEL
- 6. What is the Model? • Domain Objects • Data Transfer Objects • “Business Logic”
- 7. What is the Model? • Domain Objects • Data Transfer Objects • “Business Logic” public class Person { } public class PersonDTO { } Repository<Person>.Load(personId) MessageService.Send(message)
- 9. What is the View? • Format the Model • Render a display • Enable selecting of Actions
- 11. What is the Controller? • Expose and Respond to Actions • Manipulate Model • Choose a View
- 12. MVC in ASP.NET
- 14. Acts like a 12 year old Is a 12 year old 20-something
- 15. Acts like a 12 year old Is a 12 year old 20-something
- 16. HTTP Client Server
- 17. HTTP Client Server GET /foo.html HTTP 1.1
- 18. HTTP Client Server GET /foo.html HTTP 1.1 200 OK Content-Type: application/xhtml+xml <html> <body>Foo</body> </html>
- 19. HTTP Client Server
- 20. HTTP Client Server GET /foo.html HTTP 1.1
- 21. HTTP Client Server GET /foo.html HTTP 1.1 302 Found Location: http://www.foobar.com/bar.html
- 22. HTTP Client Server GET /foo.html HTTP 1.1 302 Found Location: http://www.foobar.com/bar.html
- 23. HTTP Client Server GET /foo.html HTTP 1.1 302 Found Location: http://www.foobar.com/bar.html GET /bar.html HTTP 1.1
- 24. HTTP Client Server GET /foo.html HTTP 1.1 302 Found Location: http://www.foobar.com/bar.html GET /bar.html HTTP 1.1 200 OK <html> <body>Bar</body> </html>
- 25. ASP.NET Client Server
- 26. ASP.NET Client Server GET /foo.aspx HTTP 1.1
- 27. ASP.NET Client Server GET /foo.aspx HTTP 1.1 Init Load Render
- 28. ASP.NET Client Server GET /foo.aspx HTTP 1.1 Init Load 200 OK Render <form>[VIEWSTATE]</form>
- 29. ASP.NET Client Server GET /foo.aspx HTTP 1.1 Init Load 200 OK Render <form>[VIEWSTATE]</form> POST /foo.aspx HTTP 1.1
- 30. ASP.NET Client Server GET /foo.aspx HTTP 1.1 Init Load 200 OK Render <form>[VIEWSTATE]</form> POST /foo.aspx HTTP 1.1 Init Load LinkClicked Redirect Render
- 31. ASP.NET Client Server GET /foo.aspx HTTP 1.1 Init Load 200 OK Render <form>[VIEWSTATE]</form> POST /foo.aspx HTTP 1.1 Init Load LinkClicked Redirect 302 Found Render Location: http://www.foobar.com/bar.aspx
- 32. ASP.NET Client Server GET /foo.aspx HTTP 1.1 Init Load 200 OK Render <form>[VIEWSTATE]</form> POST /foo.aspx HTTP 1.1 Init Load LinkClicked Redirect 302 Found Render Location: http://www.foobar.com/bar.aspx GET /bar.aspx HTTP 1.1
- 33. ASP.NET MVC Client Server
- 34. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1
- 35. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1 FooController.Bar() View(“Bar”)
- 36. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1 FooController.Bar() View(“Bar”) 200 OK
- 37. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1 FooController.Bar() View(“Bar”) 200 OK
- 38. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1 FooController.Bar() View(“Bar”) 200 OK GET /foos/ball HTTP 1.1
- 39. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1 FooController.Bar() View(“Bar”) 200 OK GET /foos/ball HTTP 1.1 FoosController.Ball() View(“Ball”)
- 40. ASP.NET MVC Client Server GET /foo/bar HTTP 1.1 FooController.Bar() View(“Bar”) 200 OK GET /foos/ball HTTP 1.1 FoosController.Ball() View(“Ball”) 200 OK
- 41. Request Flow Request URL Http Controller Response Routing Handler Route View Route View Handler Factory
- 42. CODE!
- 43. View Engines <table> <% foreach (ScheduleListing listing in schedule) { %> <tr> <td> <%=listing.StartTime %> - <%=listing.EndTime %><br /> <%= listing.Purpose %> </td> <% foreach (TrackListing track in tracks) { %> <td> <% SessionListing session = listing[track]; if (session != null) { %> <%= session.Title%><br /> (<%= session.Speaker.DisplayName%>) <% } else { %> <i>None</i> <% } %> </td> <% } %> </tr> <% } %> </table>
- 45. NHaml #foo - foreach (var product in ViewData) - if (product.Category.CategoryName != null) %h2=product.Category.CategoryName - break %ul.productlist - foreach (var product in ViewData) %li = Html.Image(quot;/Content/Images/quot; + product.ProductID + quot;.jpgquot;, product.ProductName) .productdetail =Html.ActionLink(product.ProductName, quot;Detailquot;, new { ID=product.ProductID }) %br Price: =String.Format(quot;{0:C2}quot;, product.UnitPrice) %span.editlink ( =Html.ActionLink(quot;Editquot;, quot;Editquot;, new { ID=product.ProductID }) )
- 46. NHaml #foo - foreach (var product in ViewData) - if (product.Category.CategoryName != null) %h2=product.Category.CategoryName - break %ul.productlist - foreach (var product in ViewData) %li = Html.Image(quot;/Content/Images/quot; + product.ProductID + quot;.jpgquot;, product.ProductName) .productdetail =Html.ActionLink(product.ProductName, quot;Detailquot;, new { ID=product.ProductID }) %br Price: “.productdetail” =String.Format(quot;{0:C2}quot;, product.UnitPrice) %span.editlink ( =Html.ActionLink(quot;Editquot;, quot;Editquot;, new { ID=product.ProductID }) ) becomes <div id=”productdetail”>
- 47. Spark <ul class=quot;productlistquot;> <var styles='new[] {quot;oddquot;, quot;evenquot;}'/> <li each=quot;var product in ViewData.Modelquot; class=quot;${styles[productIndex%2]}quot;> <ProductImage style='quot;float:left;quot;'/> <p> <a href=quot;/Products/Detail/${product.ProductID}quot;>${product.ProductName}</a> <br /> Price: ${String.Format(quot;{0:C2}quot;, product.UnitPrice)} <span class=quot;editlinkquot;> (${Html.ActionLink[[ProductsController]](c=>c.Edit(product.ProductID), quot;Editquot;)}) </span> </p> <div style=quot;clear:both;quot;></div> </li> </ul>
- 48. Spark <ul class=quot;productlistquot;> <var styles='new[] {quot;oddquot;, quot;evenquot;}'/> <li each=quot;var product in ViewData.Modelquot; class=quot;${styles[productIndex%2]}quot;> <ProductImage style='quot;float:left;quot;'/> <p> <a href=quot;/Products/Detail/${product.ProductID}quot;>${product.ProductName}</a> <br /> Price: ${String.Format(quot;{0:C2}quot;, product.UnitPrice)} <span class=quot;editlinkquot;> (${Html.ActionLink[[ProductsController]](c=>c.Edit(product.ProductID), quot;Editquot;)}) </span> </p> <div style=quot;clear:both;quot;></div> </li> </ul> <li each=quot;var product in ViewData.Modelquot; class=quot;${styles[productIndex%2]}quot;>
- 49. Testability
- 51. What is Testability? The ability to test.
- 52. Testability Involves... • A design approach • Explicitly defining dependencies • Isolating functionality
- 53. Testable? private void linkAddClick(object sender, EventArgs e) { string SQLInsert = quot;INSERT INTO [Tabell] ([user], [password]) VALUES (@user, @password)quot;; using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = new SqlCommand(SQLInsert, connection); command.Parameters.AddWithValue(quot;@userquot;, txtUser.Text.Trim()); command.Parameters.AddWithValue(quot;@passwordquot;, txtPassword.Text.Trim()); connection.Open(); command.CommandType = CommandType.Text; command.ExecuteNonQuery(); connection.Close(); } }
- 54. Testable? private void linkAddClick(object sender, EventArgs e) { string SQLInsert = quot;INSERT INTO [Tabell] ([user], [password]) VALUES (@user, @password)quot;; using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = new SqlCommand(SQLInsert, connection); command.Parameters.AddWithValue(quot;@userquot;, txtUser.Text.Trim()); command.Parameters.AddWithValue(quot;@passwordquot;, txtPassword.Text.Trim()); connection.Open(); command.CommandType = CommandType.Text; command.ExecuteNonQuery(); connection.Close(); } }
- 55. Testable? public class UserController : Controller { private IUserRepository _repository; public UserController(IUserRepository repository) { _repository = repository; } public ActionResult Show(string id) { User user = _repository.Load(id); return View(quot;Userquot;, user); } }
- 56. Testable? public class UserController : Controller { private IUserRepository _repository; public UserController(IUserRepository repository) { _repository = repository; } public ActionResult Show(string id) { User user = _repository.Load(id); return View(quot;Userquot;, user); } }
- 57. Let’s Test It public class UserRepositoryStub : IUserRepository { public User Load(string id) { return new User(id, quot;Aaronquot;, quot;Lerchquot;); } } [Test] public void show_action_should_call_user_view() { IUserRepository repository = new UserRepositoryStub(); UserController controller = new UserController(repository); var result = controller.Show(quot;aaronlerchquot;); Assert.That(result, Is.Not.Null); Assert.That(result.ViewName, Is.EqualTo(quot;Userquot;); }
- 58. AJAX “An AJAX-ified website is a requirement for being ‘Web 2.0’ certified, making bajillions of dollars, becoming hugely famous, regrowing your lost hair, and retiring to Tahiti.”
- 59. CODE!
- 61. Give MVC a Try! • Download ASP.NET MVC at http://www.codeplex.com/aspnet • TONS of resources linked from http://www.asp.net/mvc/ • MVCContrib.com • CodeCampServer.com Contact Me • aaronlerch@gmail.com http://www.aaronlerch.com/blog/