When I debug my project, and add an item to cart I am thrown this error, not sure what to do?
System.InvalidCastException: 'Unable to cast object of type
'System.Collections.Generic.List1[ShoppingCartApp.Classes.CartItem]'
to type
'System.Collections.Generic.List1[ShoppingCartApp.Controllers.CartItem]'.'
The error is thrown on this line #foreach (CartItem cartItem in (List<CartItem>)Session["shoppingCart"]) in my view
Heres my controller
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using ShoppingCartApp.ServiceReference1;
using ShoppingCartApp.Classes;
public class ShoppingCartController : Controller
{
Service1Client wcf = new Service1Client(); // Connection to WCF
// GET: ShoppingCart
public ActionResult ShoppingCart()
{
return View("ShoppingCart");
}
private int checkIfExisting(int id) // Checks session for existing products, increases quantity if product exists
{
List<CartItem> shoppingCart = (List<CartItem>)Session["shoppingCart"];
for (int x = 0; x < shoppingCart.Count; x++)
if (shoppingCart[x].Product.ProductID == id)
return x;
return -1;
}
public ActionResult RemoveFromCart(int id)
{
List<CartItem> shoppingCart = new List<CartItem>();
shoppingCart.Remove(new CartItem(wcf.GetProduct(id), 1));
Session["shoppingCart"] = shoppingCart;
return View("ShoppingCart");
}
public ActionResult AddToCart(int id) // Creates new session if one is not existing, adds item to cart, uses checkifexisting method to increase quantity
{
if(Session["shoppingCart"] == null)
{
List<CartItem> shoppingCart = new List<CartItem>();
shoppingCart.Add(new CartItem(wcf.GetProduct(id), 1));
Session["shoppingCart"] = shoppingCart;
} else
{
List<CartItem> shoppingCart = (List <CartItem>)Session["shoppingCart"];
int index = checkIfExisting(id);
if (index == -1)
shoppingCart.Add(new CartItem(wcf.GetProduct(id), 1));
else
shoppingCart[index].Quantity++;
Session["shoppingCart"] = shoppingCart;
}
return View("ShoppingCart");
}
public ActionResult Checkout()
{
OrderDetail orderDetail = wcf.GetOrderDetail();
return View();
}
}
And heres the class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using ShoppingCartApp.ServiceReference1;
namespace ShoppingCartApp.Classes
{
public class CartItem
{
private Product product = new Product();
public Product Product
{
get { return product; }
set { product = value; }
}
private int quantity;
public int Quantity
{
get { return quantity; }
set { quantity = value; }
}
public CartItem(Product product, int quantity)
{
this.product = product;
this.Quantity = quantity;
}
}
}
What exactly is it telling me to do?
in my view I changed ShoppingCartApp.Controllers to ShoppingCartApp.Classes, which resolved the issue completely
Related
I have a Asp.Net MVC project created from Syncfusion ASP.New MVC (Essential JS 2) VS template that is using Syncfusion's Data Grid. I can get the CrudUpdate event set in CrudUrl to fire at the server, however the value returned to CrudUpdate is empty. action parameter seems correctly set.
If I cast the value as Object, I get back a not-null, but VS cannot interrogate it. My guess is some weirdness in the way the value is cast or returned.
Has anyone got a complete working sample of the Syncfusion grid using the CrudUrl method with MVC (not asp). I am also guessing I may have some dependency issue.
View
#Html.EJS().Grid("CrudUrl").DataSource(dataManager => { dataManager.Url("/TestGrid2/UrlDatasource").CrudUrl("/TestGrid2/CrudUpdate").Adaptor("UrlAdaptor"); }).Columns(col =>
{
col.Field("RowKey").IsPrimaryKey(true).Add();
col.Field("PartitionKey").Add();
col.Field("sourceResourceId").Add();
col.Field("imagesLocation").Add();
col.Field("imagesResourceGroup").Add();
col.Field("imagePrefix").Add();
col.Field("imageVersion").Add();
}).AllowPaging().Toolbar(new List<string>() { "Search", "Add", "Edit", "Delete", "Update", "Cancel" }).EditSettings(edit => { edit.AllowAdding(true).AllowEditing(true).AllowDeleting(true); }).Render()
Controller
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Script.Services;
using System.Web.Services;
using DB;
//using Microsoft.AspNetCore.Mvc;
using Syncfusion.EJ2.Base;
namespace VMSSManagmentConsole.Controllers
{
public class TestGrid2Controller : Controller
{
private ModelContainer db = new ModelContainer();
public ActionResult TestGrid2()
{
//var items = db.ManagementItems.ToList();
//ViewBag.dataSource = items;
return View();
}
public ActionResult UrlDatasource([FromBody]DataManagerRequest dm)
{
IEnumerable DataSource = db.ManagementItems.ToList();
DataOperations operation = new DataOperations();
int count = DataSource.Cast<ManagementItem>().Count();
if (dm.Skip != 0)
{
DataSource = operation.PerformSkip(DataSource, dm.Skip); //Paging
}
if (dm.Take != 0)
{
DataSource = operation.PerformTake(DataSource, dm.Take);
}
var result = (ActionResult)(dm.RequiresCounts ? Json(new { result = DataSource, count = count }) : Json(DataSource));
return result;
}
public ActionResult CrudUpdate([FromBody]ICRUDModel<ManagementItem> value, string action)
{
//if (value.action == "update")
//{
// var ord = value.value;
// ManagementItem val = db.ManagementItems.Where(or => or.RowKey == ord.RowKey).FirstOrDefault();
// val.imagePrefix = ord.imagePrefix;
// val.imagesLocation = ord.imagesLocation;
// val.imagesResourceGroup = ord.imagesResourceGroup;
// val.imageVersion = ord.imageVersion;
// val.sourceResourceId = ord.sourceResourceId;
//}
//else if (value.action == "insert")
//{
// db.ManagementItems.Add(value.value);
//}
//else if (value.action == "remove")
//{
// db.ManagementItems.Remove(db.ManagementItems.Where(or => or.RowKey == value.key.ToString()).FirstOrDefault());
// return Json(value);
//}
//return Json(value.value);
return null;
}
public class ICRUDModel<T> where T : class
{
public string action { get; set; }
public string table { get; set; }
public string keyColumn { get; set; }
public object key { get; set; }
public T value { get; set; }
public List<T> added { get; set; }
public List<T> changed { get; set; }
public List<T> deleted { get; set; }
public IDictionary<string, object> #params { get; set; }
}
}
}
Use the DataGrid scaffold wizard. On the third page select DataSourceType = "Remote Data". A page and controller will be created with the correct code.
For your reference, we have created a sample and perform CRUD actions. Please refer the attached sample for more information.
Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/GridEJ2Mvc-914352281
The reported problem occurred when model mismatched. For Example, when we specify the number column field(EmployeeID) in grid but while inserting you did not specify the value for that column then it shows value as null in CrudUpdate, for this scenario you need to specify the nullable value for that field in model class as follows.
public class OrdersDetails
{
public OrdersDetails(int OrderID, string CustomerId, int EmployeeId, double Freight, bool Verified, DateTime OrderDate, string ShipCity, string ShipName, string ShipCountry, DateTime ShippedDate, string ShipAddress)
{
this.OrderID = OrderID;
this.CustomerID = CustomerId;
this.EmployeeID = EmployeeId;
. . . . .
}
public static List<OrdersDetails> GetAllRecords()
{
if (order.Count() == 0)
{
int code = 10000;
for (int i = 1; i < 10; i++)
{
order.Add(new OrdersDetails(code + 1, "ALFKI", i + 0, 2.3 * i, false, new DateTime(1991, 05, 15), "Berlin", "Simons bistro", "Denmark", new DateTime(1996, 7, 16), "Kirchgasse 6"));
. . . . .
}
}
return order;
}
public int? OrderID { get; set; }
public string CustomerID { get; set; }
public int? EmployeeID { get; set; } // it accept null value
. . . . .
}
}
If you still face the problem then share more details or below information that will helpful for us to validate further and provide a better solution as soon as possible.
• Did the problem occurred for both update and insert?
• Share package version details.
Regards,
Thavasianand S.
Update: I debugged it several times and it seems that the 'UpdateUserDetails' function was fine, but I think the problem is in this line (within UpdateUser function):
var filter = Builders<User>.Filter.Eq("ID", input.ID);
I have a website (I have yet to upload it online), in which I use MongoDB on local host. I have USER SYSTEM (includes Login, Registration..). I tried to add an option to edit any registered user manualy by the admin, but I keep failing with updating the database with the new 'version' of the user.
The relevant code is attached..
~ The update function:
[HttpPost]
public ActionResult UpdateUser(User input)
{
// var a = input.ID;
var filter = Builders<User>.Filter.Eq("ID", input.ID);
var update = Builders<User>.Update
.Set("FirstName", input.FirstName)
.Set("LastName", input.LastName)
.Set("Phone", input.Phone)
.Set("Email", input.Email)
.Set("Password", input.Password)
.Set("Permission", input.Permission);
DBManager.UpdateUserDetails(filter, update);
ViewBag.Update = "Update successful";
return RedirectToAction("UsersList");
}
~ My DBManager class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MongoDB.Driver;
using MongoDB.Bson;
using MongoDB.Driver.Linq;
using SurffingSite.Models;
namespace SurffingSite.DB
{
public class DBManager
{
static MongoClient client;
static IMongoDatabase DB;
// Constractor
static DBManager()
{
client = new MongoClient("mongodb://localhost:27017");
DB = client.GetDatabase("HELLOSTACKOVERFLOW");
}
// Method to get list of all users//
public static IMongoCollection<User> GetUsersCollection()
{
var collection = DB.GetCollection<User>("User");
return collection;
}
internal static object GetCollection<T>(string v)
{
throw new NotImplementedException();
}
//User Method //
// Method for adding new user
public static void AddNewUser(User user)
{
var collection = DB.GetCollection<User>("User");
collection.InsertOne(user);
}
//Get user email.
public static User GetUserEmail(User input)
{
User email = DBManager.GetUsersCollection().Find(user => user.Email == input.Email).FirstOrDefault();
return email;
}
//Get user passsword.
public static User GetUserPassword(User input)
{
User password = DBManager.GetUsersCollection().Find(user => user.Password == input.Password).FirstOrDefault();
return password;
}
//User login verification
public static User UserVerification(User input)
{
// try get user by email
// if user exist than check if the password is correct if not than return null
User UseVar = DBManager.GetUserEmail(input);
if (UseVar != null && UseVar.Password == input.Password)
{
return UseVar;
}
return null;
}
//Update User details
public static void UpdateUserDetails(FilterDefinition<User> filter, UpdateDefinition<User> update)
{
var collection = DB.GetCollection<User>("User");
collection.UpdateOne(filter, update);
}
//Products Method's//
// Adding product into DB
public static void AddProduct(Products product)
{
var collection = DB.GetCollection<Products>("Products");
collection.InsertOne(product);
}
public static IMongoCollection<Products> GetProductsCollection()
{
var collection = DB.GetCollection<Products>("Products");
return collection;
}
// Find product in DB by ID
public static Products FindProductsById(Products input)
{
Products searchedProd = DB.GetCollection<Products>("Products").Find(product => product.Id == input.Id).FirstOrDefault();
return searchedProd;
}
//Update product
public static void UpdateDetails(FilterDefinition<Products> filter, UpdateDefinition<Products> update)
{
var collection = DB.GetCollection<Products>("Products");
collection.UpdateOne(filter, update);
}
//Orders//
// This method will return all exist orders
public static IMongoCollection<Orders> GetOrdersCollection()
{
var collection = DB.GetCollection<Orders>("Orders");
return collection;
}
//Place an new order
public static void AddOrder(Orders order)
{
var collection = DB.GetCollection<Orders>("Orders");
collection.InsertOne(order);
}
// Search for all user orders
public static List<Orders> FindUserOrders(User user)
{
List<Orders> searchedorders = DB.GetCollection<Orders>("Orders")
.Find(order => order.User.ID == user.ID).ToList<Orders>();
return searchedorders;
}
}
}
~ The User model:
using MongoDB.Bson;
using MongoDB.Bson.Serialization.Attributes;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
namespace SurffingSite.Models
{
public class User
{
[Required]
[BsonId]
public ObjectId ID { get; set; }
[BsonElement("FirstName")]
public String FirstName { get; set; }
[BsonElement("LastName")]
public String LastName { get; set; }
[BsonElement("Phone")]
public String Phone { get; set; }
[BsonElement("Email")]
public String Email { get; set; }
[BsonElement("Password")]
public String Password { get; set; }
[BsonElement("Permission")]
public string Permission { get; set; }
}
}
I think the failure is within the 'Filter'...
THANKS IN ADVANCE
Note: I can't bountify this question yet (it's too new), but I will reward a good answer with 50 points, and a great answer with 100 (when possible).
I need to incorporate DI into my Web API project. I currently have the expected Model and Controller folders/classes, along with corresponding Repository classes.
That seemed to work well for awhile, but now I need to use DI with the Controllers so that I can pass an Interface type to the Controllers' constructor.
I'm struggling with just how to implement this; that is, how to incorporate the DI "extravaganza" into my existing Model/Controller/Repository structure. I have example DI code, but I don't know just how it should be applied to my project.
Perhaps some code is in order to try to make this clear. I will show a simple sample of what I've got, followed by the DI code I'd like to somehow incorporate into it / with it.
Here is the existing Model/Controller/Repository code:
MODEL
public class Department
{
public int Id { get; set; }
public int AccountId { get; set; }
public string Name { get; set; }
}
CONTROLLER
public class DepartmentsController : ApiController
{
private readonly IDepartmentRepository _deptsRepository;
public DepartmentsController(IDepartmentRepository deptsRepository)
{
if (deptsRepository == null)
{
throw new ArgumentNullException("deptsRepository is null");
}
_deptsRepository = deptsRepository;
}
public int GetCountOfDepartmentRecords()
{
return _deptsRepository.Get();
}
public IEnumerable<Department> GetBatchOfDepartmentsByStartingID(int ID, int CountToFetch)
{
return _deptsRepository.Get(ID, CountToFetch);
}
public void PostDepartment(int accountid, string name)
{
_deptsRepository.PostDepartment(accountid, name);
}
public HttpResponseMessage Post(Department department)
{
// Based on code 2/3 down http://www.codeproject.com/Articles/344078/ASP-NET-WebAPI-Getting-Started-with-MVC4-and-WebAP?msg=4727042#xx4727042xx
department = _deptsRepository.Add(department);
var response = Request.CreateResponse<Department>(HttpStatusCode.Created, department);
string uri = Url.Route(null, new { id = department.Id });
response.Headers.Location = new Uri(Request.RequestUri, uri);
return response;
}
REPOSITORY
public class DepartmentRepository : IDepartmentRepository
{
private readonly List<Department> departments = new List<Department>();
public DepartmentRepository()
{
using (var conn = new OleDbConnection(
#"Provider=Microsoft.ACE.OLEDB.12.0;User ID=BlaBlaBla...
{
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = "SELECT td_department_accounts.dept_no,
IIF(ISNULL(t_accounts.name),'No Name provided',t_accounts.name) AS name
FROM t_accounts INNER JOIN td_department_accounts ON
t_accounts.account_no = td_department_accounts.account_no ORDER BY
td_department_accounts.dept_no";
cmd.CommandType = CommandType.Text;
conn.Open();
int i = 1;
using (OleDbDataReader oleDbD8aReader = cmd.ExecuteReader())
{
while (oleDbD8aReader != null && oleDbD8aReader.Read())
{
int deptNum = oleDbD8aReader.GetInt16(0);
string deptName = oleDbD8aReader.GetString(1);
Add(new Department { Id = i, AccountId = deptNum, Name,
deptName });
i++;
}
}
}
}
}
public int Get()
{
return departments.Count;
}
private Department Get(int ID) // called by Delete()
{
return departments.First(d => d.Id == ID);
}
public IEnumerable<Department> Get(int ID, int CountToFetch)
{
return departments.Where(i => i.Id > ID).Take(CountToFetch);
}
public Department Add(Department dept)
{
if (dept == null)
{
throw new ArgumentNullException("Department arg was null");
}
// This is called internally, so need to disregard Id vals that already exist
if (dept.Id <= 0)
{
int maxId = departments.Max(d => d.Id);
dept.Id = maxId + 1;
}
if (departments != null) departments.Add(dept);
return dept;
}
public void PostDepartment(int accountid, string name)
{
int maxId = departments.Max(d => d.Id);
Department dept = new Department();
dept.Id = maxId + 1;
dept.AccountId = accountid;
dept.Name = name;
departments.Add(dept);
}
public void Post(Department department)
{
int maxId = departments.Max(d => d.Id);
department.Id = maxId + 1;
departments.Add(department);
}
public void Put(Department department)
{
int index = departments.ToList().FindIndex(p => p.Id == department.Id);
departments[index] = department;
}
public void Put(int id, Department department)
{
int index = departments.ToList().FindIndex(p => p.Id == id);
departments[index] = department;
}
public void Delete(int id)
{
Department dept = Get(id);
departments.Remove(dept);
}
And now here is the DI code that I want to incorporate
Classes in the DIInstallers folder:
IDepartmentProvider.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace HandheldServer.DIInstallers
{
public interface IDepartmentProvider
{
// These are the methods that are in the sample example IAuthProvider interface; I don't know what I need yet, though...
//bool Authenticate(string username, string password, bool createPersistentCookie);
//void SignOut();
}
}
DepartmentProvider.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace HandheldServer.DIInstallers
{
public class DepartmentProvider : IDepartmentProvider
{
// TODO: Implement methods in IDepartmentProvider, once they have been added
}
}
DepartmentProviderInstaller.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Castle.MicroKernel.Registration;
using Castle.MicroKernel.SubSystems.Configuration;
using Castle.Windsor;
namespace HandheldServer.DIInstallers
{
public class DepartmentProviderInstaller : IWindsorInstaller
{
public void Install(IWindsorContainer container, IConfigurationStore store)
{
container.Register(Classes.FromThisAssembly()
.BasedOn(typeof(IDepartmentProvider))
.WithServiceAllInterfaces());
// If I declare/implement more interface types (other than IDepartmentProvider), I assume there would be another container.Register() call for each of them?
}
}
}
Classes in the DIPlumbing folder:
WindsorCompositionRoot.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Castle.Windsor;
using System.Net.Http;
using System.Web.Http.Controllers;
using System.Web.Http.Dispatcher;
namespace HandheldServer.DIPlumbing
{
public class WindsorCompositionRoot : IHttpControllerActivator
{
private readonly IWindsorContainer container;
public WindsorCompositionRoot(IWindsorContainer container)
{
this.container = container;
}
public IHttpController Create(
HttpRequestMessage request,
HttpControllerDescriptor controllerDescriptor,
Type controllerType)
{
var controller =
(IHttpController)this.container.Resolve(controllerType);
request.RegisterForDispose(
new Release(
() => this.container.Release(controller)));
return controller;
}
private class Release : IDisposable
{
private readonly Action release;
public Release(Action release)
{
this.release = release;
}
public void Dispose()
{
this.release();
}
}
}
}
WindsorControllerFactory.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using Castle.MicroKernel;
namespace HandheldServer.DIPlumbing
{
public class WindsorControllerFactory : DefaultControllerFactory
{
private readonly IKernel kernel;
public WindsorControllerFactory(IKernel kernel)
{
this.kernel = kernel;
}
public override void ReleaseController(IController controller)
{
kernel.ReleaseComponent(controller);
}
protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
{
if (controllerType == null)
{
throw new HttpException(404, string.Format("The controller for path '{0}' could not be found.", requestContext.HttpContext.Request.Path));
}
return (IController)kernel.Resolve(controllerType);
}
}
}
The Global.asax.cs file
using System;
using System.Reflection;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using Castle.Windsor;
using Castle.Windsor.Installer;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.Http.Dispatcher;
using HandheldServer.DIPlumbing;
namespace HandheldServer
{
public class WebApiApplication : System.Web.HttpApplication
{
private static IWindsorContainer container;
protected void Application_Start()
{
BootstrapContainer();
AreaRegistration.RegisterAllAreas();
GlobalConfiguration.Configure(WebApiConfig.Register);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
}
// Code that runs when an unhandled error occurs
void Application_Error(object sender, EventArgs e)
{
// Get the exception object.
Exception exc = Server.GetLastError();
log.Error(exc.Message);
// Clear the error from the server
Server.ClearError();
}
private static void BootstrapContainer()
{
container = new WindsorContainer().Install(FromAssembly.This());
var controllerFactory = new WindsorControllerFactory(container.Kernel);
ControllerBuilder.Current.SetControllerFactory(controllerFactory);
GlobalConfiguration.Configuration.Services.Replace(
typeof(IHttpControllerActivator), new WindsorCompositionRoot(container));
}
protected void Application_End()
{
container.Dispose();
}
}
}
So, I think I've basically got the code I need, but how to fold the DI code into my previous (Model/Controller/Repository) code is the part that has me stumped.
You can simply use WebApiContrib.IoC.CastleWindsor (Nuget).
This test should give you an idea of how to use it.
Can anyone please tell me whether this is the correct way of creating a viewmodel. I'm using Ninject and the only way I can get the view model to work is with the code below.
Also I cannot seem to be able to pass the data from the viewmodel to the controller unless I create a 2nd interface.
The code below does work, but reading all the examples I have seen I seem to be duplicating a lot off code from my domain layer.
---------------------Code Data access layer------
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
namespace Web.Domain.SearchEngine
{
public class DisplaySearchResults
{
public string Title { get; set; }
public string Description { get; set; }
public string URL { get; set; }
}
public class GetSearchResults : IGetSearchResults
{
private string dbConn;
public GetSearchResults()
{
dbConn = ConfigurationManager.ConnectionStrings["Search"].ConnectionString;
}
public IEnumerable<DisplaySearchResults> SearchResults(string q, string option, int pagenumber)
{
List<DisplaySearchResults> Data = new List<DisplaySearchResults>();
string spName = "dbo.FTS_On_at_Websites";
using (SqlConnection cn = new SqlConnection(dbConn))
{
using (SqlCommand cmd = new SqlCommand(spName, cn))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("#strSearchPhrase", SqlDbType.VarChar, 100));
cmd.Parameters.Add(new SqlParameter("#SearchMode", SqlDbType.Int, 4));
cmd.Parameters.Add(new SqlParameter("#intPageNumber", SqlDbType.Int));
cmd.Parameters.Add(new SqlParameter("#intRecordsPerPage", SqlDbType.Int));
cmd.Parameters.Add(new SqlParameter("#intTotalRecordsReturned", SqlDbType.Int));
cmd.Parameters["#strSearchPhrase"].Value = q;
cmd.Parameters["#SearchMode"].Value = 1;
cmd.Parameters["#intPageNumber"].Value = pagenumber;
cmd.Parameters["#intRecordsPerPage"].Value = 10;
cmd.Parameters["#intTotalRecordsReturned"].Value = 10;
cn.Open();
using (SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.Default))
{
if (rdr.HasRows)
{
while (rdr.Read())
{
Data.Add(new DisplaySearchResults
{
Title = (string)rdr["PageTitle"],
Description = (string)rdr["PageParagraph"],
URL = (string)rdr["PageURL"]
});
}
}
return Data;
}
}
}
}
}
}
-------------Code ViewModel--------------------
using Microsoft.Security.Application;
using System.Collections.Generic;
using System.Linq;
using Web.Domain.SearchEngine;
namespace Web.UI.ModelHelpers.Search
{
public class DisplaySearchResultsViewModel
{
public string Title { get; set; }
public string Description { get; set; }
public string URL { get; set; }
}
public class GetSearchResultsViewModel : IGetSearchResultsViewModel
{
private readonly IGetSearchResults _IGSR;
public GetSearchResultsViewModel(IGetSearchResults IGSR)
{
_IGSR = IGSR;
}
public IEnumerable<DisplaySearchResultsViewModel> SearchResultsViewModel(string q, string option, int pagenumber)
{
var searchResults = _IGSR.SearchResults(q, option, pagenumber).AsEnumerable();
List<DisplaySearchResultsViewModel> GetData = new List<DisplaySearchResultsViewModel>();
foreach (var details in searchResults.AsEnumerable())
{
GetData.Add(new DisplaySearchResultsViewModel()
{
Title = Sanitizer.GetSafeHtmlFragment(details.Title),
Description = Sanitizer.GetSafeHtmlFragment(details.Description).ToLower(),
URL = Sanitizer.GetSafeHtmlFragment(details.URL),
});
}
return GetData;
}
}
}
In controller I have
var DisplaySearchResults = _IGSR.SearchResultsViewModel(cleanText, "1", 1);
No, this is not the correct way to build a view model. A view model should not contain any data access logic in it. That's the responsibility of the model.
What you should do instead is use Ninject to inject the IGetSearchResults instance into your controller instead of having your GetSearchResultsViewModel view model take it as constructor dependency. Actually you do not need this GetSearchResultsViewModel at all. You already have the correct view model called DisplaySearchResultsViewModel. Then it's the responsibility of your controller to use your data access layer and build this view model.
For example:
public class SomeController : Controller
{
private readonly IGetSearchResults repository;
public SomeController(IGetSearchResults repository)
{
this.repository = repository;
}
public ActionResult SomeAction(string q, string option, int pagenumber)
{
// query your data access layer and build the view model that you will
// pass to the view
IEnumerable<DisplaySearchResultsViewModel> model = this.repository
.SearchResults(q, option, pagenumber)
.AsEnumerable()
.Select(details => new DisplaySearchResultsViewModel
{
Title = Sanitizer.GetSafeHtmlFragment(details.Title),
Description = Sanitizer.GetSafeHtmlFragment(details.Description).ToLower(),
URL = Sanitizer.GetSafeHtmlFragment(details.URL)
})
.ToList();
return View(model);
}
}
Why am I getting a exception when ApplyPropertyChanges???
The code is almost the same when I'm editing a user table but is not working with my news table.
The create, delete and details are all working fine but when I try to edit a news I'm getting the exception below:
The ObjectStateManager does not contain a ObjectStateEntry 'MagixCMS.Models.noticia'
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace MagixCMS.Models
{
public class NoticiaRepository : INoticiaRepository
{
#region INoticiaRepository Members
magixcmsEntities _entities = new magixcmsEntities();
public noticia CreateNoticia(noticia noticiaToCreate)
{
_entities.AddTonoticiaSet(noticiaToCreate);
_entities.SaveChanges();
return noticiaToCreate;
}
public void DeletaNoticia(noticia noticiaToDelete)
{
var noticiaOriginal = GetNoticia(noticiaToDelete.Id);
_entities.DeleteObject(noticiaOriginal);
_entities.SaveChanges();
}
public noticia EditNoticia(noticia noticiaToEdit)
{
var noticiaOriginal = GetNoticia(noticiaToEdit.Id);
_entities.ApplyPropertyChanges(noticiaToEdit.EntityKey.EntitySetName, noticiaToEdit); //EXCEPTION HERE
_entities.SaveChanges();
return noticiaToEdit;
}
public noticia GetNoticia(int id)
{
return (from c in _entities.noticiaSet where c.Id == id select c).FirstOrDefault();
}
public IEnumerable<noticia> ListNoticias()
{
return _entities.noticiaSet.ToList();
}
#endregion
}
}
I google the exception and didn't found much help.
I solve it.
The problem is on the EF model.
To solve it you'll need a extension method to persist your data:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
namespace MagixCMS.Models
{
public static class Extensions
{
public static void Update(ObjectContext context, string entitySetName, IEntityWithKey entity)
{
entity.EntityKey = context.CreateEntityKey(entitySetName, entity);
context.Attach(entity);
var stateEntry = context.ObjectStateManager.GetObjectStateEntry(entity.EntityKey);
var propertyNameList = stateEntry.CurrentValues.DataRecordInfo.FieldMetadata.Select(pn => pn.FieldType.Name);
foreach (var propName in propertyNameList)
{
stateEntry.SetModifiedProperty(propName);
}
}
}
}
And in the Edit method you do:
public noticia EditNoticia(noticia noticiaToEdit)
{
//GET THE CONTEXT FOR THE ENTITY
ObjectContext _context = this._entities.noticiaSet.Context;
var noticiaOriginal = GetNoticia(noticiaToEdit.Id);
//UPDATE THE ORIGINAL ENTITY WITH THE NEW VALUES
Extensions.Update(_context, noticiaOriginal.EntityKey.EntitySetName, noticiaToEdit);
//PERSIST THE DATA
_entities.SaveChanges();
return noticiaToEdit;
}