Pro Aspnet MVC 4读书笔记(1) - Your First MVC Application
Listing 2-1. The default contents of the HomeController class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
}
}
Listing 2-2. Modifying the HomeController Class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public string Index()
{
return "Hello World";
}
}
}
Listing 2-3. Modifying the Controller to Render a View
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public ViewResult Index()
{
return View();
}
}
}
Listing 2-4. Adding to the View HTML
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
Hello World (from the view)
</div>
</body>
</html>
Listing 2-5. Setting Some View Data
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public ViewResult Index()
{
int hour = DateTime.Now.Hour;
ViewBag.Greeting = hour < ? "Good Morning" : "Good Afternoon";
return View();
}
}
}
Listing 2-6. Retrieving a ViewBag Data Value
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
@ViewBag.Greeting World (from the view)
</div>
</body>
</html>
Listing 2-7. Displaying Details of the Party
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
@ViewBag.Greeting World (from the view)
<p>
We're going to have an exciting party.<br />
(To do: sell it better. Add pictures or something.)
</p>
</div>
</body>
</html>
Listing 2-8. The GuestResponse Domain Class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace PartyInvites.Models
{
public class GuestResponse
{
public string Name { get; set; }
public string Email { get; set; }
public string Phone { get; set; }
public bool? WillAttend { get; set; }
}
}
Listing 2-9. Adding a Link to the RSVP Form
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
@ViewBag.Greeting World (from the view)
<p>
We're going to have an exciting party.<br />
(To do: sell it better. Add pictures or something.)
</p>
@Html.ActionLink("RSVP Now", "RsvpForm")
</div>
</body>
</html>
Listing 2-10. Adding a New Action Method to the Controller
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public ViewResult Index()
{
int hour = DateTime.Now.Hour;
ViewBag.Greeting = hour < ? "Good Morning" : "Good Afternoon";
return View();
} public ViewResult RsvpForm()
{
return View();
}
}
}
Listing 2-12. The initial contents of the RsvpForm.cshtml file
@model PartyInvites.Models.GuestResponse
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>RsvpForm</title>
</head>
<body>
<div>
</div>
</body>
</html>
Listing 2-13. Creating a Form View
@model PartyInvites.Models.GuestResponse
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>RsvpForm</title>
</head>
<body>
@using (Html.BeginForm()) {
<p>Your name: @Html.TextBoxFor(x => x.Name)</p>
<p>Your name: @Html.TextBoxFor(x => x.Email)</p>
<p>Your name: @Html.TextBoxFor(x => x.Phone)</p>
<p>
Will you attend?
@Html.DropDownListFor(x => x.WillAttend,
new[]{
new SelectListItem(){Text = "Yes, I'll be there", Value = bool.TrueString},
new SelectListItem(){Text = "No, I can't come", Value = bool.FalseString}
},
"Choose an option")
</p>
<input type="submit" value="Submit RSVP" />
}
</body>
</html>
Listing 2-14. Adding an Action Method to Support POST Requests
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using PartyInvites.Models; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public ViewResult Index()
{
int hour = DateTime.Now.Hour;
ViewBag.Greeting = hour < ? "Good Morning" : "Good Afternoon";
return View();
} [HttpGet]
public ViewResult RsvpForm()
{
return View();
} [HttpPost]
public ViewResult RsvpForm(GuestResponse guestResponse)
{
// TODO: Email response to the party organizer
return View("Thanks", guestResponse);
}
}
}
Listing 2-15. The Thanks View
@model PartyInvites.Models.GuestResponse
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Thanks</title>
</head>
<body>
<div>
<h1>Thanks you, @Model.Name!</h1>
@if (Model.WillAttend == true) {
@:It's great that you're coming. The drinks area already in the fridge!
} else {
@:Sorry to hear that you can't make it, but thanks for letting us know.
}
</div>
</body>
</html>
Listing 2-16. Applying Validation to the GuestResponse Model Class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations; namespace PartyInvites.Models
{
public class GuestResponse
{
[Required(ErrorMessage = "Please enter your name")]
public string Name { get; set; } [Required(ErrorMessage = "Please enter your email address")]
[RegularExpression(".+\\@.+\\..+",
ErrorMessage = "Please enter a valid email address")]
public string Email { get; set; } [Required(ErrorMessage = "Please enter your phone number")]
public string Phone { get; set; } [Required(ErrorMessage = "Please specify whether you'll attend")]
public bool? WillAttend { get; set; }
}
}
Listing 2-17. Checking for Form Validation Errors
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using PartyInvites.Models; namespace PartyInvites.Controllers
{
public class HomeController : Controller
{
public ViewResult Index()
{
int hour = DateTime.Now.Hour;
ViewBag.Greeting = hour < ? "Good Morning" : "Good Afternoon";
return View();
} [HttpGet]
public ViewResult RsvpForm()
{
return View();
} [HttpPost]
public ViewResult RsvpForm(GuestResponse guestResponse)
{
if (ModelState.IsValid)
{
// TODO: Email response to the party organizer
return View("Thanks", guestResponse);
}
else
{
// there is validation error
return View();
}
}
}
}
Listing 2-18. Using the Html.ValidationSummary Help Method
@model PartyInvites.Models.GuestResponse
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>RsvpForm</title>
</head>
<body>
@using (Html.BeginForm()) {
@Html.ValidationSummary()
<p>Your name: @Html.TextBoxFor(x => x.Name)</p>
<p>Your email: @Html.TextBoxFor(x => x.Email)</p>
<p>Your phone: @Html.TextBoxFor(x => x.Phone)</p>
<p>
Will you attend?
@Html.DropDownListFor(x => x.WillAttend,
new[]{
new SelectListItem(){Text = "Yes, I'll be there", Value = bool.TrueString},
new SelectListItem(){Text = "No, I can't come", Value = bool.FalseString}
},
"Choose an option")
</p>
<input type="submit" value="Submit RSVP" />
}
</body>
</html>
Listing 2-19. The contents of the Content/Site.css file
.field-validation-error {
color: #f00;
}
.field-validation-valid {
display: none;
}
.input-validation-error {
border: 1px solid #f00;
background-color: #fee;
}
.validation-summary-errors {
font-weight: bold;
color: #f00;
}
.validation-summary-valid {
display: none;
}
Listing 2-20. Adding the link element to the RsvpForm view
@model PartyInvites.Models.GuestResponse
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<link rel="stylesheet" type="text/css" href="~/Content/Site.css" />
<title>RsvpForm</title>
</head>
<body>
@using (Html.BeginForm()) {
@Html.ValidationSummary()
<p>Your name: @Html.TextBoxFor(x => x.Name)</p>
<p>Your email: @Html.TextBoxFor(x => x.Email)</p>
<p>Your phone: @Html.TextBoxFor(x => x.Phone)</p>
<p>
Will you attend?
@Html.DropDownListFor(x => x.WillAttend,
new[]{
new SelectListItem(){Text = "Yes, I'll be there", Value = bool.TrueString},
new SelectListItem(){Text = "No, I can't come", Value = bool.FalseString}
},
"Choose an option")
</p>
<input type="submit" value="Submit RSVP" />
}
</body>
</html>
Listing 2-21. Using the WebMail Helper
@model PartyInvites.Models.GuestResponse
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Thanks</title>
</head>
<body>
@{
try
{
WebMail.SmtpServer = "smtp.example.com";
WebMail.SmtpPort = 587;
WebMail.EnableSsl = true;
WebMail.UserName = "mySmtpUsername";
WebMail.Password = "mySmtpPassword";
WebMail.From = "rsvps@example.com";
WebMail.Send("party-host@example.com", "RSVP Notification",
Model.Name + " is " + ((Model.WillAttend ?? false) ? " " : "not ") + "attending");
}
catch(Exception)
{
@:<b>Sorry - we coundn't send the email to confirm your RSVP.</b>
}
}
<div>
<h1>Thanks you, @Model.Name!</h1>
@if (Model.WillAttend == true) {
@:It's great that you're coming. The drinks area already in the fridge!
} else {
@:Sorry to hear that you can't make it, but thanks for letting us know.
}
</div>
</body>
</html>
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