C# - EF4: Compex Inheritance With Interfaces?
Mar 17, 2011
I'm using EF4 to generate a model. My architecture looks like this:
IMyEntity (custom interface)
-> MyEntity - EF generated class
IMyOtherEntity (custom interface)
-> MyExtendedEntity (Customn Partial class) : MyOtherEntity (EF Generated)
The first entity has a list of MyExtendedEntity. Is there any way I can bind this with the entity framework. I'm targetting ASP.NET and WPF. The main probnlem I have is that I need an ObservableCollection in WPF, while the EF generated class only has an EntityCollection which doesn't even seem to derive from ObservableCollection.
View 1 Replies
Similar Messages:
Oct 20, 2012
Can interface inherit othe class or more than one class? Can we create constructor of the interfaces?
View 1 Replies
Feb 12, 2010
Is there a Django-like admin interface generator for ASP.NET or ASP.NET MVC?If not, are there any tools that could assist in creating one?
View 2 Replies
Dec 21, 2010
From the following URL i got some doubts about the Recommendations for using Abstract class vs interfaces
[URL]
1. If you anticipate creating multiple versions of your component, create an abstract class. Abstract classes provide a simple and easy way to version your components. By updating the base class, all inheriting classes are automatically updated with the change. Interfaces, on the other hand, cannot be changed once created. If a new version of an interface is required, you must create a whole new interface. { Is there any example for this t ounderstand throughly ?} If you are designing small, concise bits of functionality, use interfaces. If you are designing large functional units, use an abstract class. If you want to provide common, implemented functionality among all implementations of your component, use an abstract class. Abstract classes allow you to partially implement your class, whereas interfaces contain no implementation for any members. { Is there any example for this t ounderstand throughly?
View 3 Replies
Jul 28, 2010
We have a SSO authentication service that other externally facing web pages and services use to authenticate users. A user tries to reach a service, if no cookie is found containing an authentication token, they are redirected (HTTP 302) to the SingleSignOn authentication service. The auth service does it's work, and redirects the user (HTTP 302) to the original URL with their encrypted authentication token in the URL. Great. How can I invoke this from a WCF POX service? No SOAP here, just HTTP GET/POST with XML responses.
What I'm currently doing is, in each service method implementation method, checking the headers for the cookie. If the cookie exists, verify the auth token and process the request. If the cookie doesn't exist or the auth token has expired, then respond with:
[Code]....
That works, but isn't integrated with any of the WCF features, and requires me to manually code for a whole bunch of scenarios. Is there a way I could implement this using these classes:
[Code]....
or use some other means that checks each request to the service? I've been reading pages like: How to: Create a Custom Token, but I don't see how it applies to my needs. I'm looking into this because I have some time before my project kicks off, and I'd like to implement this project correctly and learn about WCF as much as I can.
View 2 Replies
Sep 6, 2010
I am new to ASP.NET development. I noted that the design interface provided with visual studio 2010 is not very help ful in designing eye catching website. May be I am missing some pice of inforanmtion. To improve my understanding, specially with reference to Visual studo 2010/ASP.NET, I wanted to know useful resources about HTML, CSS and javascript
View 2 Replies
Dec 6, 2010
If you try to use a property as a column for a gridview where the value is coming from an implicitly implemented interface, the value will not be found and throw an error. Even if you pass in a List of the interface.DataBinding: 'Class' does not contain a property with the name 'Field'.
View 4 Replies
Jan 28, 2011
I am setting up my new project..We are using entity frame work 4.0..
Is there any way to generate all classes and interfaces as we create manually for 3-tier architecture...
Or do i need to generate manually...
Ex:
Itest.cs
Public Interface ITest
{
int testproperty {get;set:}
}
Test.cs
Public class Test: ITest
{
public int testproperty {get;set:}
}
View 1 Replies
Aug 14, 2010
I have attempted to deploy my first WEB application and needed to include the Membership for Internet login. Application works fine when I use Visual Web Developer, but when I deploy to my provider when I attempt to Login, I eventually get the error message (this was after I turned on the debug="true" - full message is
[Code]....
When I copied the application to the WebSite, I assumed that the ASPNETDB.MDF needed to be copied too with everything that I defined for users and roles. Looked at the WEB.CONFIG and expected to see something defined here as to where it is located, etc. Do not see anything in my project with the name.
View 3 Replies
Mar 20, 2010
Suppose that you have a big Data Entry Web Application Like Microsoft CRM, what is the strategies and technologies that you follow to build a website like it?
I don't want to use any Dynamic Web Page Generation software, because it have a lot of limitations..
Also I don't want to design every page and repeat everything
View 3 Replies
Jul 9, 2010
I have a build a new 3 tier application (Web,Application,Data tier). The application tier (middle tier) will host wcf web services. I build my service classes, define bindings , contracts etc which does the core business logic, data access and updates.
Now I have around 50 external clients who would want services from my application tier. But my problem is client A might send a flat file request, client B might sends a comma separated file request, client C might be a soap request. The requests further may be either real time or batch. My services may have to send data back to the caller either in a flat file.., xml or a soap response or other formats. The response might also be either batch or real time.
1)Is there a way to standardize the interface for all these 50 clients accessing my WCF services ?
2) If an external client sends a flat file via FTP (intended to serve as input to my service), how do I get this flat file data to hit my service. (Assuming that the legacy system is not service based and hence the external client just sends a file and is not aware of any services of the new system)
View 1 Replies
Mar 11, 2010
I am missing this DLL reference in c:program filesSQL Server90ToolsBinn. I'm assuming that this is because I didn't install the 2005 client. I installed all of the services for 2005, the database instance, reporting services instance, SSAS and SSIS. I installed the 2008 client though, not the 2005 client, and 2008 database instance.So I assume it's because I didn't install the client, but does something else give me this DLL? Another install or a SDK or something?
View 1 Replies
Apr 11, 2012
Is there any resource out there , where one can learn how to properly design user interfaces with ASP.NET controls on Visual Studio ?I have tried on my own by adding <asp:Table/> to form and then trying to accomodate panels within <asp:TableCell/> controls but that isn't quite going the way I imagined it would.This may not be the right way to design UIs, but I don't know any better for now.
View 7 Replies
Feb 15, 2011
I've got a multi level dependency chain in my object model: An organization has the following children relationships:
Organization
.CompetitionGroups
.CompetitionGroups.Venues
.CompetitionGroups.Competitions
.Divisions.Games
.Divisions.Games.Participants
.Divisions.Games.Participants.GameSegments
.Divisions.SubDivisions...
.Divisions
.Teams
.Teams.Players
.Teams.Participants
.Teams.Participants.GameSegments
.VenueDates
This is just a glimpse at the object model, but it's focused on the complexity of the relationships and lists. What I can't really get is what's the best way to factor my repository interfaces, given the requirements to do a unit of work. For example, to create a game, you'll need a venuedate and two participants. Does that mean the GamesController should require an IGameRepository, an IVenueDateRepository, and an IParticipant repository? Should they be rolled into one repository?
Also, what about in the consumption cases? For example, to display a signle team's schedule, you'll need all of the Participants for that Team, all of the Games for that participant, and all of the GameSegments for the participant. If those are factored into individual repositories I can't see how you can do efficient queries. Does that mean you have Repositories specifically focused on different cases? for example:
public interface IScheduleRepository {
public ICollection<Game> GetScheduleForTeam(Team team);
// More consumption methods
}
public class ScheduleRepositry : IScheduleRepository {
public ScheduleRepository (ModelContext context) {
// Do stuff with context
}
public ICollection<Game> GetScheduleForTeam(Team team) {
return (
from p in context.Participants
where ((p.Game.VenueDate != null) &&
(p.TeamId == team.Id))
orderby p.Game.VenueDate.StartTime
select p.Game).ToList();
}
// more consumption methods
}
public interface IGameRepository {
public void AddGame(Game game);
// More crud methods
}
// Not showing games repository
public class GamesController : Controller {
public GamesController (IGameRepository gamesRepo,
IVenueDateRepository venueDateRepo,
IParticipantRepository participantRepo) {
// do stuff with repos here
}
[HttpPost]
public ActionResult AddGame(Game game) {
// Skipping validation logic
// this?
VenueDate = venueDateRepo.Add(game.VenueDate);
foreach (Participant p in Game.Participants)
{
participantRepo.Add(p);
}
Game = gamesRepo.AddGame(game);
// or this?
// how would the game repo know to persist
// the children elements? is that tight coupling?
Game = gamesRepo.AddGame(game);
}
// more consumption methods
}
My question is I don't yet understand to what degree factoring your repositories make sense based on a connected object model. I'd love to get some advice here.
View 1 Replies
Feb 1, 2011
what is best to use in CTP 5 for inheritence. Ive heard of 3 ways of doing it. (This is indirectly addressed to Serenarules )
Table per Hierarchy ?
Table per Type ?
or able per Concrete Type ?
For those who wondering what the hell is that.. refer to http://weblogs.asp.net/manavi/default.aspx which is a nice blog about inheritence and polymorphism in CTP 5.
View 5 Replies
Jul 16, 2010
All my controllers inherit from a BaseController that has an ActionFilter attribute:
[AnalyticsData]
public class BaseController : Controller {}
public class AccountController : BaseController {}
Some of my Actions in my controllers reuse the AnalyticsData ActionFilter:
public class AccountController : BaseController
{
[AnalyticsData(Page="AccountProfile")]
public ActionResult Profile()
{
// return View
}
}
I notice that the AnalyticsData ActionFilter only runs once. This is a good thing and I only want it to run once, but I'm wondering how that happens. If I set my breakpoint inside the OnActionExecuting:
public class AnalyticsAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
// break point set here
}
}
only gets hit once when AccountController serves it Profile view. How do ActionFilters and/or Attributes work that [AnalyticsData(Page="AccountProfile")] on the Action overrides/replaces [AnalyticsData] on BaseController?
View 1 Replies
Aug 15, 2010
When people talk about extending a control are they just talking about inheritance?
View 1 Replies
Feb 6, 2010
Can anybody tell me why multiple inheritance is not supported in C#?
View 9 Replies
Mar 1, 2010
I'm trying to figure out if its possible to have multiple inheritance in a view in ASP.Net MVC. Right now I'm trying to print out a list of entries from two different tables from my model in a single View. I have the following line at the top of my view:
Inherits="System.Web.Mvc.ViewPage<List<GEApproval.Models.CoursePrefix>>"
But I also want to include the table Course as follows:
Inherits="System.Web.Mvc.ViewPage<List<GEApproval.Models.Course>>"
I went ahead and created a composite class as follows:
namespace GEApproval.Models
{
public class Listings: GEApproval.Models.CoursePrefix, GEApproval.Models.ICourse
{
public List<CoursePrefix> CoursePrefixObjList { get; set; }
public List<Course> CourseObjList { get; set; }
private GEApprovalDataModel _db;
//Constructor
public Listings()
{
_db = new GEApprovalDataModel();
}
//Generate a list of all courses associated with the prefix and place in ViewData model
public void listCourses(ViewDataDictionary viewData, int prefixID)
{
var test = _db.CoursePrefix.Include("Course").First(cp => cp.id == 1);
//Show total courses for this prefix
viewData.Model = test.Course.ToList();
viewData["prefix"] = test.Prefix;
viewData["courseCount"] = test.Course.Count;
int courseCount = test.Course.Count();//Test
}
}
}
And in my view, I now have the following line:
Inherits="System.Web.Mvc.ViewPage<List<GEApproval.Models.Listings>>"
I'm still a little confused because I still cannot access the properties of the Course object when listing them in my view, because I'm only inheriting directly from CoursePrefix. I'm not sure what I'm missing. Do I need to have a constructor for the composite object? Do I need the inherit and implementation statements for CoursePrefix and ICourse respectively if I'm already, supposedly, exposing the properties of each within the Listings wrapper class?
View 5 Replies
Mar 10, 2011
I work in a web agency and thus we are plenty of websites from several customers. They're built upon a cms we made, so websites are quite identical for the 90% of code. However, remaining 10% struggles me and my team as it involves not only the presentation layer but behavioral logics too (ex: a website1 requires simply user/pass registration while website2 needs more data, facebook connector, etc. But this is a very easy example). Making ad hoc development for our customers is becoming painful as keep each version aligned is getting really hard for us What I really dream to have is an extendible website that works by itself, but in which I can override a part. This behavior should sound like "look for the specific part, if it doesn't exists get the base one". The parts could be a method, a class, a page, a control, a static file.
example:
Suppose I want website2 to have an own login component, let's so imagine that we have a situation like:
/website_base
|_ login.aspx
/website1
/website2
|_ login.aspx
So, if I ask for [URL] I'll get /website_base/login.aspx, but if I ask for [URL] I'll get /website2/login.aspx
View 3 Replies
Oct 11, 2010
I think I know the answer to this but hoping someone has a neat solution. We are currently using two kinds of drop down controls (telerik and .net). I'm hoping to combine these into one control but struggling with a user friendly design.
Ideally the control would be created in the design file with a bool property of say "SimpleBox", to determine which kind of control to inherit. The instantiation would then be generated in the code behind design file and the constructor would then dynamically load the base (which isn't possible). The easy solution would be for me to create a IDropDown interface then have a factory create the correct one. The only real problem with this is the fact the instantiation has to be manually written every time. Which is a hassle, and does not speed up our process at all.
Although it isn't directly possible i'm looking for a solution along the lines of a factory which is ran inside the object constructor for setting the base, based on a bool property.
View 1 Replies
Oct 25, 2010
Am new bee to Webservices.I have declared complete BLL in the class library.
Can call those methods defined in Class library class files(.cs file) in .asmx file.
View 3 Replies
Oct 9, 2010
I have a solution with quite a few different MasterPages / BasePages which all inherit from somewhere else. My problem is that I have a virtual string in BaseMaster, which is overridden by BaseManagement, but when I try to access this string I always get the base valueThe point of inheriting masters and pages is obviously to avoid having duplicate code everywhere.
View 1 Replies
Oct 11, 2010
I am currently trialing EF4 code-first. My POCO classes inherit from an Audit class that contains CreatedBy, CreatedOn, UpdatedBy, UpdatedOn. I was hoping the framework would include the Audit properties in my Action table when creating my database, however this doesn't appear to be the case. Does anyone know how to enable this without overriding the OnModelCreating() method?
Public Class Audit
Public Property CreatedOn as DateTime
End Class
Public Class Action
inherits Audit
Public Property ActionId As Int32
End Class
View 1 Replies
Mar 27, 2011
I have created a Entity named MediaItem which is Abstract and Game inherits form it. I create the database automatically and I get a table MediaItems and MediaItems_Game.
The issue is when I do the following in my ASP.Net Controller:
private Models.DBContainer dataModel = new DBContainer();
dataModel. ---> Intellisense shows me MediaItem but I can find no way to either navigate to or use MediaItems_Game, how can I solve this? i.e. How can I grab a list of 'Games' with some 'WHERE' constraints on another table (not pictured).
View 1 Replies