I added an Entity Framework class (EDMX) in my MVC project but the entity collection namespace is not referenceable from my controller class, consequently I cannot access any of my entity objects.
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For the death of me I cannot remember how I got this right the last time.
I got 2 tables in my database, tblClients and tblOrders
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In my project I got an Client and Order class
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I create and edmx and then a "context" class (forgot most of EF stuff. This is just a quick demo I got to have ready)
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However, when I run I get this error: Mapping and metadata information could not be found for EntityType 'ClientManager.Domain.Client'.
I have a new project where I want to use MVC (I will be learning as I code), and I have never used linq or entity (or mvc). Which should I use? Does it matter? I will be having a lot of different databases, from Oracle to FoxPro.
View 6 RepliesCan i use Ado.Net Entity Framework in SmartDeviceProject in Vs2008?
View 2 RepliesHow do I upgrade an existing VS2010 ASP.Net 3.5 project from Entity Framework 3.5 to Entity Framework 4.0?
Do I:
- Change the references?
- Change the target framework?
when I put a break point i get this error message:
Error 1 The type or namespace name 'X509Certificate' could not be found (are you missing a using directive or an assembly reference?) D:UsersatttDesktop
fre
etetrtDefault.aspx.cs 7 53 D:...attt
Is there a way to export a EF 4.0 Data Model to EF 3.5?
I looked around and found that we are not able to access EF 4.0 from a ASP.Net 3.5 project here: [URL]
Our project is the 1st to go to .Net 4.0 using Entity Framework and we (the team) were wondering if there was a way for the other projects that "might" need to access our data that are still using the .Net 3.5 framework.
I am new to entity framework , it is really very good , but I want to know what is the difference between using entity framework with stored procedure or without stored procedure , which one the faster and what is the benefits for using stored procedures with entity framework.
View 1 RepliesI have an EDM, it includes the entities extension and history. My goal is to use history to keep track of all the changes made to extension entity. For example, if extension with ID 223 has its property 'Name_Display' changed - I want the history entity to record this.
I'm using ASP.NET with VB.NET. Where in my code do I put the hook to say, "update the history entity" and what should that hook look like?
I get an cast exception when i am trying to insert an entity in Entity Framework (using code-first). From this code :
public virtual T Insert(T entity)
{
return Context.Set<T>().Add(entity);
}
The cast exception is like "impossible to cast ...Collection'1(Entity) to type (Entity)" I can't figure out why. I am pretty sure ive done everything right. Post entity
public class Post
{
public long PostId { get; private set; }
public DateTime date { get; set; }
[Required]
public string Subject { get; set; }
public User User { get; set; }
public Category Category { get; set; }
[Required]
public string Body { get; set; }
public virtual ICollection<Tag> Tags { get; private set; }
public Post()
{
Category = new Category();
if (Tags == null)
Tags = new Collection<Tag>();
}................................
I am mapping a stored procedure to an entity by right clicking on the entity (in the .edmx) and selecting "Stored Procedure Mapping." This brings you to a Mapping Details - "Name of Entity" Window that allows you to select the insert, update, and delete stored procedures associated with the Entity. It also maps the stored procedure parameter to the Entity "Property" (Column).
I'm gettin an error "error 2042: Parameter Mapping specified is not valid." The cause of the error is fairly obvious, in the Insert stored procedure that has been selected, a 'CHAR' parameter is being mapped to an Int32 Entity Property. I altered the stored procedure parameter to match the entity, I deleted the stored procedure, readded, and reslected it as the Insert function. I also cleaned, validated, updated model from database. No matter what I do, the parameter list in the mapping details doesn't reflect the change to the stored procedure. It's stuck on a char --> int32 mapping, even though it has been changed, like it's buried deep in meta data some where.
I am trying to add a new entity and have to refernce associated data to add it. I cannot load the Referencetables. Giving "The EntityReference could not be loaded because it is not attached to an ObjectContext." How do i complete this task in Entity Framework 3.5
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I have a stupid problem with the Entity Framework. I get the following Exception:
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I have an entity with a 4 fields representing the primary key. I copy it via serialization (works fine). I set the old entity to not valid (Datefield set to a date in the past, this field is part of the PK) and set the copied entity to DateTime.Now.Date. When I call context.AddObject I get the Exception above. I tried copying the entity via reflection but the entity has 3-4 references. And when copied, I get another Exception before even Adding the entity to the context. I also tried setting newObj.EntityKey = null and reset all the fields neccessary for the PK. I just want a whole copy of an entity with a different primary key (and some other fields changed too) and Create it in the database.
I add a web service reference to my project. I use this service in many pages. It is working correctly, no problems in VS but I copy App_WebReferences folder's files and Web.Config file to ISS path. But it is not working.Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0246: The type or namespace name 'InterkomLaboratuar' could not be found (are you missing a using directive or an assembly reference?)
I know that this sounds like a simple referencing problem from the title this is becoming a nightmare!I have a code class that uses the "iAnywhere.Data.AsaClient.dll". This Dll is referenced in the project and in the code class I have added this dll in the Using section.Everything seems fine at build with no errors at all but when I go to run the application it comes up with the following Compilation Error: Compiler Error Message: CS0246: The type or namespace name 'iAnywhere' could not be found (are you missing a using directive or an assembly reference?)The line that the Error points to this line in the class:using iAnywhere.Data.AsaClient;I have set the dll to copy local and it makes no difference, the Dll is installed on my PC so is in the GAC, I use this Dll with many other C# projects and have no problems.I have scoured Google looking for an answer and haven't found anything that points me to an answer to my problem.
View 1 RepliesI'm writing a custom .NET MembershipProvider (not the built in one) and trying to update using Entity Framework. But of course i have no access to (Try)UpdateModel. How can i update it?
View 3 RepliesI have an Events table and an InstallmentPlans table. The relationship is 0..1 : an Event can have 0 or 1 Installment plans. If I want to remove the existing InstallmentPlan for an event, how do I do this? Setting it to null doesn't seem to work:
_event.InstallmentPlan = null;
Here's a simple code snippet where I create a new Entity object and call SaveChanges() to create a new record in the mapped database table.
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What I'm trying to figure out is whether there is a way to derive this new key for my entity, e, from the ObjectContext, m? The reason for this is that the way my actual code is structured, my entity object is already out of scope at the point where I call the SaveChanges() method.
I am trying to do something like this:
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But ofcourse it is not working as I want to. The Ordering works on Question.Order, but I would also the
Questions.SubQuestions List to be ordered according to SubQuestions.Order
CatagoriesController.cs
sing System;using System.Linq;using System.Web.Mvc;using ProductSystem.Models;using ProductSystem.ViewModels; namespace ProductSystem.Controllers{ public class CatagoriesController : Controller {
public ActionResult Create() { var viewModel = new CatagoriesCreateViewModel { Product_Catagories = new Product_Catagories()
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"The Type or namespace name 'Manufacturers' Could not be found......
I am following the tut here[URL]
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The type or namespace name 'XmlConfigurator' could not be found (are you missing a using directive or an assembly reference?)
View 2 RepliesI am developing a VS 2008 web application in C#. I am trying to include a namespace that is stored in one of my folders. So instead of:
using ADONET_namespace
it is stored in "Admins" folder. How do I modify this aspx.cs file to include Admins/ADONET_namespace?
Currently I get following error from aspx.cs file:
The type or namespace name 'ADONET_namespace' could not be found (are you missing a using directive or an assembly reference?)
I am getting a strange error over one site vs another. I have created a chart web site that works, but now I'm moving that code into an existing website. I'm getting this error (see title) and cannot figure out why. The references are the same and I have the using directives the same (as far as I can tell). I'm stumped.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.DataVisualization.Charting;
using System.Data.SqlClient;
using System.Drawing;
using System.Data;
...
Charting.Title vbTitle = new Charting.Title( ddlSchool.SelectedItem.Text.ToString() + " Logins per Hour" );
...
I have downloaded Json.net dll from http://json.codeplex.com/releases/view/43775. I extracted asp.net 2.0 dll and copied into my application bin folder under applicationin folder in inetpubwwwroot.Then I added json refrence in inline aspx code page as<%@ Import Namespace="Newtonsoft.Json" %>Now whenever I try to run my aspx page, it gives me following errorThe type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?) at System.Web.Compilation.AssemblyBuilder.Compile()
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