Pro Aspnet MVC 4读书笔记(4) - Working with Razor
Listing 5-1. Creating a Simple Domain Model Class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace Razor.Models
{
public class Product
{
public int ProductId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public decimal Price { get; set; }
public string Category { set; get; }
}
}
Listing 5-2. A Simple Controller
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Razor.Models; namespace Razor.Controllers
{
public class HomeController : Controller
{
Product prod = new Product {
ProductId = ,
Name = "Kayak",
Description = "A boat for one person",
Category = "Watersports",
Price = 275M
}; public ActionResult Index()
{
return View(prod);
}
}
}
Listing 5-3. A Simple Razor View
@model Razor.Models.Product
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
</div>
</body>
</html>
Listing 5-4. Referring to a View Model Object Property in a Razor View
@model Razor.Models.Product
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
@Model.Name
</div>
</body>
</html>
Listing 5-5. The Initial Contents of a Layout
<!DOCTYPE html> <html>
<head>
<meta name="viewport" content="width=device-width" />
<title>@ViewBag.Title</title>
</head>
<body>
<div>
@RenderBody()
</div>
</body>
</html>
Listing 5-6. Adding Elements to a Layout
<!DOCTYPE html> <html>
<head>
<meta name="viewport" content="width=device-width" />
<title>@ViewBag.Title</title>
</head>
<body>
<h1>Product Information</h1>
<div style="padding:20px;border:solid medium black;font-size:20pt">
@RenderBody()
</div>
<h2>Visit <a href="http://apress.com">Appress</a></h2>
</body>
</html>
Listing 5-7. Using the Layout Property to Specify a View File
@model Razor.Models.Product
@{
ViewBag.Title = "Product Name";
Layout = "~/Views/_BasicLayout.cshtml";
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
@Model.Name
</div>
</body>
</html>
Listing 5-8. Creating a View Start File
@{
Layout = "~/Views/_BasicLayout.cshtml";
}
Listing 5-9. Updating the View to Reflect the Use of a View Start File
@model Razor.Models.Product
@{
ViewBag.Title = "Product Name";
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
@Model.Name
</div>
</body>
</html>
Listing 5-10. Adding a New Action Method to the Home Controller
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Razor.Models; namespace Razor.Controllers
{
public class HomeController : Controller
{
Product prod = new Product {
ProductId = ,
Name = "Kayak",
Description = "A boat for one person",
Category = "Watersports",
Price = 275M
}; public ActionResult Index()
{
return View(prod);
} public ActionResult NameAndPrice()
{
return View(prod);
}
}
}
Listing 5-11. The Contents of the NameAndPrice View
@model Razor.Models.Product
@{
ViewBag.Title = "NameAndPrice";
Layout = "~/Views/_BasicLayout.cshtml";
}
<h2>NameAndPrice</h2>
Listing 5-12. Adding to the NameAndPrice Layout
@model Razor.Models.Product
@{
ViewBag.Title = "NameAndPrice";
Layout = "~/Views/_BasicLayout.cshtml";
}
<h2>NameAndPrice</h2>
The product is @Model.Name and it costs $@Model.Price
Listing 5-13. The DemoExpression Action Method
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Razor.Models; namespace Razor.Controllers
{
public class HomeController : Controller
{
Product prod = new Product {
ProductId = ,
Name = "Kayak",
Description = "A boat for one person",
Category = "Watersports",
Price = 275M
}; public ActionResult Index()
{
return View(prod);
} public ActionResult NameAndPrice()
{
return View(prod);
} public ActionResult DemoExpression()
{
ViewBag.ProductCount = ;
ViewBag.ExpressShip = true;
ViewBag.ApplyDiscount = false;
ViewBag.Supplier = null; return View(prod);
}
}
}
Listing 5-14. The Contents of the DemoExpression View File
@model Razor.Models.Product
@{
ViewBag.Title = "DemoExpression";
}
<table>
<thead>
<tr>
<th>Property</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Name</td>
<td>@Model.Name</td>
</tr>
<tr>
<td>Price</td>
<td>@Model.Price</td>
</tr>
<tr>
<td>Stock Level</td>
<td>@ViewBag.ProductCount</td>
</tr>
</tbody>
</table>
Listing 5-15. Using a Razor Expression to Set an Attribute Value
@model Razor.Models.Product
@{
ViewBag.Title = "DemoExpression";
Layout = "~/Views/_BasicLayout.cshtml";
}
<table>
<thead>
<tr>
<th>Property</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Name</td>
<td>@Model.Name</td>
</tr>
<tr>
<td>Price</td>
<td>@Model.Price</td>
</tr>
<tr>
<td>Stock Level</td>
<td>@ViewBag.ProductCount</td>
</tr>
</tbody>
</table>
<div data-discount="@ViewBag.ApplyDiscount" data-express="@ViewBag.ExpressShip"
data-supplier="@ViewBag.Supplier">
The Containing element has data attributes
</div>
Discount:<input type="checkbox" checked="@ViewBag.ApplyDiscount" />
Express: <input type="checkbox" checked="@ViewBag.ExpressShip" />
Supplier:<input type="checkbox" checked="@ViewBag.Supplier" />
Listing 5-16. Using a Conditional Razor Statement
@model Razor.Models.Product
@{
ViewBag.Title = "DemoExpression";
Layout = "~/Views/_BasicLayout.cshtml";
}
<table>
<thead>
<tr>
<th>Property</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Name</td>
<td>@Model.Name</td>
</tr>
<tr>
<td>Price</td>
<td>@Model.Price</td>
</tr>
<tr>
<td>Stock Level</td>
<td>
@switch ((int)ViewBag.ProductCount)
{
case 0:
@: Out of Stock
break;
case 1:
<b>Low Stock(@ViewBag.ProductCount)</b>
break;
default:
@ViewBag.ProductCount
break;
}
</td>
</tr>
</tbody>
</table>
Listing 5-17. Using an if Statement in a Razor View
@model Razor.Models.Product
@{
ViewBag.Title = "DemoExpression";
Layout = "~/Views/_BasicLayout.cshtml";
}
<table>
<thead>
<tr>
<th>Property</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Name</td>
<td>@Model.Name</td>
</tr>
<tr>
<td>Price</td>
<td>@Model.Price</td>
</tr>
<tr>
<td>Stock Level</td>
<td>
@if (ViewBag.ProductCount == 0)
{
@: Out of Stock
}
else if (ViewBag.ProductCount == 1)
{
<b>Low Stock(@ViewBag.ProductCount)</b>
}
else
{
@ViewBag.ProductCount
}
</td>
</tr>
</tbody>
</table>
Listing 5-18. The DemoArray Action Method
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Razor.Models; namespace Razor.Controllers
{
public class HomeController : Controller
{
Product prod = new Product {
ProductId = ,
Name = "Kayak",
Description = "A boat for one person",
Category = "Watersports",
Price = 275M
}; // Other action methods omitted for brevity public ActionResult DemoArray()
{
Product[] array =
{
new Product {Name = "Kayak", Price = 275M},
new Product {Name = "Lifejacket", Price = 48.95M},
new Product {Name = "Soccer ball", Price = 19.50M},
new Product {Name = "Corner flag", Price = 34.95M}
}; return View(array);
}
}
}
Listing 5-19. The Contents of the DemoArray.html File
@model Razor.Models.Product[]
@{
ViewBag.Title = "DemoArray";
Layout = "~/Views/_BasicLayout.cshtml";
}
@if (Model.Length > 0)
{
<table>
<thead>
<tr>
<th>Product</th>
<th>Price</th>
</tr>
</thead>
<tbody>
@foreach (Razor.Models.Product prod in Model)
{
<tr>
<td>@prod.Name</td>
<td>$@prod.Price</td>
</tr>
}
</tbody>
</table>
}
else
{
<h2>No product data</h2>
}
Listing 5-20. Applying the @using Expression
@using Razor.Models
@model Product[] @{
ViewBag.Title = "DemoArray";
Layout = "~/Views/_BasicLayout.cshtml";
} @if (Model.Length > 0)
{
<table>
<thead>
<tr>
<th>Product</th>
<th>Price</th>
</tr>
</thead>
<tbody>
@foreach (Razor.Models.Product prod in Model)
{
<tr>
<td>@prod.Name</td>
<td>$@prod.Price</td>
</tr>
}
</tbody>
</table>
}
else
{
<h2>No product data</h2>
}
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