Entity Framework 6 - Knowledge Base (KB)

Using HTML, create an empty textbox. An EF entity's TextBoxFor on a not-null attribute

I am using Entity Framework (v4) entities. I have an entity called Car with a Year property of type integer. The Year property does not allow NULL. I have the following in my Create view:...<%= Html.TextBoxFor(model => model.Year) %> ...I am required to r...

Using Entity Framework and DataAnnotations

I have used the Entity Framework with VS2010 to create a simple person class with properties, firstName, lastName, and email. If I want to attach DataAnnotations like as is done in this ...blog post... I have a small problem because my person class is dy...

EntityType Exception mapping and metadata information could not be found.

I am trying out ASP.NET MVC Framework 2 with the Microsoft Entity Framework and when I try and save new records I get this error: ...Mapping and metadata information could not be found for EntityType 'WebUI.Controllers.PersonViewModel'...My Entity Framewo...

Where should SetInitializer be placed in Entity Framework CTP4?

I am attempting to add Entity Framework, code first, to an MVC application that's been running with test data, using the CTP4 preview....I am currently getting this error:...The model backing the 'SchedulerContext' context has changed since the database w...

How to utilize the Html ShortDate string format. TextBoxFor

Using Entity Framework with MVC2, I have a series of date textboxes, that I want to display data from the model in a short date format, but I have to use Html.TextBoxFor in order for the update code to work (Having tried using HTML.Textbox the data never...

When using UpdateModel with LINQ to Entities in ASP.NET MVC 2, "The model of type 'XYZ' could not be updated" (.NET 3.5)

I have a model set up using LINQ to Entities and have code working that adds to the database as expected. However, I can't get UpdateModel to work when I am using .NET 3.5....[HttpPost] public ActionResult Edit(Site.Models.XYZ xyz) { try { ...

In an MVC application, where should the Entity Framework Data Model be placed?

Lets consider default ASP.NET MVC application folder structure, so it's looks like this:...-App_data -Content -Controllers HomeController.cs -Models AccountModels.cs -Scripts -Views ...My question is: Where is the best place to put Entity Framewor...

Implementation of searching in jqgrid in ASP.NET MVC 2.0

Hi I am trying to use the single column search in jqgrid using MVC 2 IN .NET (VS 2008) this is the code I have so far but I need an example to match it with or a tip of what I am missing ...jQuery("#list").jqGrid({ url: '/Home/DynamicGridData/', ...

How much Include in EntityFramework can I use on an ObjectSet to maintain performance?

I am using the following LINQ query for my profile page:...var userData = from u in db.Users .Include("UserSkills.Skill") .Include("UserIdeas.IdeaThings") .Include("UserInterests.Inte...

In Entity Framework, get the top N rows in the table.

I'm kind of stuck with a problem that I'm having. Among others, I have this tables in my DB:...Product (int productId, ...otherProductInfo) Customer (int customerId, ...otherCustomerInfo) SoldToData ( int productId, int customerId) ...I want to get top te...

Using a dropdown list to populate a textbox with data (onChange)

I am building a website using ASP.NET MVC and entity framework. I have a DB table with Country info:...CountryID int; ShortName nvarchar; CountryCode nvarchar; ...In my View I have:...<div class="editor-field"><%: Html.DropDownListFor(model => model.addre...

Insert new record into database using Entity Framework

I have a table in my database like this:...[id] [uniqueidentifier] NOT NULL, [user_id] [uniqueidentifier] NOT NULL, [download_type] [nvarchar](50) NOT NULL, [download_id] [nvarchar](50) NOT NULL, [download_date] [datetime] NOT NULL, [user_ip_address] [nva...

N-Tier Architecture with Service Layer, Business Layer, and Entity Framework

Just wanted some feedback/help with the way I'm architecturing my application. My current solution structure looks something like this:...UI (Actual MVC application)...Core (only Controllers & ViewModels)...Services...BLL ...Data (Entity framework DbConte...