ASP.NET MVC SportStore 购物网示例(7)
为实体类Product添加验证消息
[Table(Name="Products")]
public class Product : IDataErrorInfo
{
[Column(IsPrimaryKey = true, IsDbGenerated = true, AutoSync = AutoSync.OnInsert)]
public int ProductID { get; set; }
[Column]
public string Name { get; set; }
[Column]
public string Description { get; set; }
[Column]
public decimal Price { get; set; }
[Column]
public string Category { get; set; }
public string this[string propName]
{
get
{
if ((propName == "Name") && string.IsNullOrEmpty(Name))
return "Please enter a product name";
if ((propName == "Description") && string.IsNullOrEmpty(Description))
return "Please enter a description";
if ((propName == "Price") && (Price < 0))
return "Price must not be negative";
if ((propName == "Category") && string.IsNullOrEmpty(Category))
return "Please specify a category";
return null;
}
}
public string Error { get { return null; } } // Not required
}
为了使更新到数据库的数据确实有效，在SaveProduct方法中添加EnsureValid()方法。
private void EnsureValid(IDataErrorInfo validatable, params string[] properties)
{
if (properties.Any(x => validatable[x] != null))
throw new InvalidOperationException("The Object is invalid");
}
public void SaveProduct(Product product)
{
EnsureValid(product, "Name", "Description", "Category", "Price");
.....
}
添加新的产品
添加一个新的产品很容易实现，我们只需要提交一个空的Product对象到edit视图就可以了。
public ViewResult Create()
{
return View("Edit",new Product());
}
将把单击Save进默认的Action会提供到Create Action 所以，修改Form的提供位置。
修改 Edit.aspx :
<% using (Html.BeginForm("Edit","Admin")) {%>
删除一个产品
添加一个测试
[Test]
public void Delete_Action_Deletes_Product_Then_Redirects_To_Index()
{
// Arrange
AdminController controller = new AdminController(mockRepos.Object);
Product prod24 = mockRepos.Object.Products.First(p => p.ProductID == 24);
// Act (attempt to delete product 24)
RedirectToRouteResult result = controller.Delete(24);
// Assert
Assert.AreEqual("Index", result.RouteValues["action"]);
Assert.AreEqual("Product 24 has been deleted",
controller.TempData["message"]);
mockRepos.Verify(x => x.DeleteProduct(prod24));
}
添加删除接口
public interface IProductsRepository
{
IQueryable<Product> Products { get; }
void SaveProduct(Product product);
void DeleteProduct(Product product);
}
在SqlRepositoryProduct添加方法
public void DeleteProduct(Product product)
{
productsTable.DeleteOnSubmit(product);
productsTable.Context.SubmitChanges();
}
添加视图方法：
public RedirectToRouteResult Delete(int id)
{
Product product = (from p in productsRepository.Products
where p.ProductID == id
select p).First();
productsRepository.DeleteProduct(product);
TempData["message"] = product.Name + " has been deleted";
return RedirectToAction("Index");
}
管理员安全管理
打开web.config文件，更新authentication
<authentication mode="Forms">
<!--<forms loginUrl="~/Account/LogOn" timeout="2880"/>-->
<forms loginUrl="~/Account/LogOn" timeout="2880">
<credentials passwordFormat="SHA1">
<user name="admin" password="e9fe51f94eadabf54dbf2fbbd57188b9abee436e" />
</credentials>
</forms>
</authentication>
用户名是admin密码是 mysecret
为 AdminController类添认证标记
[Authorize]
public class AdminController : Controller
添加AccountController类：
public class AccountController : Controller
{
[AcceptVerbs(HttpVerbs.Get)]
public ViewResult LogOn()
{
return View();
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult LogOn(string name, string password, string returnUrl)
{
if (FormsAuthentication.Authenticate(name, password))
{
// Assign a default redirection destination if not set
returnUrl = returnUrl ?? Url.Action("Index", "Admin");
// Grant cookie and redirect
FormsAuthentication.SetAuthCookie(name, false);
return Redirect(returnUrl); ;
}
else
{
ViewData["lastLoginFailed"] = true;
return View();
}
}
}
为LogOn添加视图：
图像上传
修改领域模型和数据库
为Product类添加属性：
[Column]
public byte[] ImageData { get; set; }
[Column]
public string ImageMimeType { get; set; }
为数据库添加字段：
为Edit.aspx添加上传：
<p>
Image:
<% if (Model.ImageData == null)
{ %>
None
<% }
else
{ %>
<img src="<%= Url.Action("GetImage", "Products",new { Model.ProductID }) %>" />
<% } %>
<div>
Upload new image:
<input type="file" name="Image" /></div>
</p>
<input type="submit" value="Save" />
修改Form
<% using (Html.BeginForm("Edit", "Admin", FormMethod.Post,
new { enctype = "multipart/form-data" })) { %>
保存图片到数据库
修改Edit方法：
[HttpPost]
public ActionResult Edit(Product product,HttpPostedFileBase image)
{
//try
//{
// TODO: Add update logic here
if (ModelState.IsValid)
{
if (image != null)
{
product.ImageMimeType = image.ContentType;
product.ImageData = new byte[image.ContentLength];
image.InputStream.Read(product.ImageData, 0, image.ContentLength);
}
显示图片
为ProductsController添加方法：
public FileContentResult GetImage(int ProductID)
{
Product product = (from p in productsRepository.Products
where p.ProductID == ProductID
select p).First();
return File(product.ImageData, product.ImageMimeType);
}
更新ProductSummary.ascxj显示图片
<% if (Model.ImageData != null)
{ %>
<div style="float: left; margin-right: 20px">
<img src="<%= Url.Action("GetImage", "Products",
new { Model.ProductID }) %>" />
</div>
<% } %>
<h3>
<%=Model.Name %></h3>
F5运行.
全部结束!祝好运！
转载请注明出处! Author: im@xingquan.org
