I developed and entity framework (.edmx) application in 4.0 in that i got all the data of my querying table and its foreign key referenced tables data also. but when i change my project to 3.5 i am unable to get the data of foreign key referenced tables data. Please help me out... ...
Hi, One strange thing i've got to see in Entity Framework 4.0 V2 Auto Generated Classes(tt) is that the classes are not marked as Serializable. Although they are having DataContract attribute for WCF. Now the problem is, when I store the POCO object into viewstate it throws me an exception saying that the class is not serializable. If...
I am creating an Entity Framework 4 application, and I need an unmapped property in one of my entities--my code will manage that property. What's the best way to create the property? I assume I would create the property in a partial class for the entity, using code like this: private byte[] _Foo; public byte[] Foo { get { ...
Hello, In What scenario that I have to use DTO's pattern in the entity framework the and not the Self Tracking Entities pattern? Can I start with Self Tracking Entities because it's easier to develop and then add DTO's in the next Phase ??? As always, your advice is greatly appreciated... ...
Hi everybody, In VS 2010, changing true in a MVC2 project's .csproj file causes an error if you are using Entity Framework. Could not load type 'System.Data.Entity.Design.AspNet.EntityDesignerBuildProvider'. C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config 129 I want to build views while I'm debugging, and I also want m...
Hi I have an ASP.NET MVC Page that i have to display the fields in customized Text. For that I have built a CustomModel RequestViewModel with the following fields. Description, Event, UsageDate Corresponding to these my custom Model has the below code. So that, the DisplayName is displayed on the ASP.NET MVC View page. Now being ...
I was wondering what the general recommendation is for Entity Framework in terms of data validation. I am relatively new to EF, but it appears there are two main approaches to data validation. The first is to create a partial class for the model, and then perform data validations and update a collection of rule violations. This is outli...
Hi! I have an ASP.NET 4.0 website that has an Entity Data Model hooked up to WCF Data Service. When the Service and Model are in the same assembly everything works. Unfortunately, when I move the Model to another "shared" assembly (and change the namespace) the service compiles but throws a 500 error when launched in a browser. The r...
Hi, i have a problem with this code: public partial class KnihovnyForm : Form { DatabazeEntities db; public KnihovnyForm() { InitializeComponent(); db = new DatabazeEntities(); knihovnyListBox.DataSource = db.Knihovny; knihovnyListBox.DisplayMember = "Nazev"; } protected override v...
Entity Framework does not display the last changes from the database, but after sometime it shows the updated contents. I don't any special cache on the server or on the page. Thank in advance. Jack Here is the code i use to get the list, that has problem: var m = from relation in ett.Article_Relations from article in ett.Articl...
Is there an equivalence in Entity Framework to NHibernate SchemaExport? Given I have a working Entity-Model, I would like to programmatically initialize a database. I would like to use this functionality in the setup of my integration tests. Creating the matching DDL for an Entity-Model would also suffice. ...
I have 2 tables, Forums and Posts. I want to retrieve all Forums fields with a new extra field: count all post that belong to this forum. I have this for now: var v =(from forum in Forums join post in Posts on forum.ForumID equals post.Forum.ForumID select new { forum, //Need to retrieve all fields/columns from fo...
Thanks for taking a look at my post. I've been working with linq to sql and have generally been happy, until i just noticed that database table names are hardcoded into the classes/dbml files-- which can't work in our environment. We need to be able to have database names completely changeable via web.config-- in one place. That's a def...
I want to pass a number of values into a parameter of the EntityDataSource, e.g.: Where="it.ORDER_ID IN {@OrderIdList}" (this is a property on the EntityDataSource) <WhereParameters> <asp:ControlParameter Name="OrderIdList" Type="Int16" ControlID="OrderFilterControl" PropertyName="OrderIdList" /> </WhereParamet...
Is it possible to add a property to an entity where the property is not supposed to map to the database? ...
This is my query: from forum in Forums join post in Posts on forum equals post.Forum into postGroup from p in postGroup where p.ParentPostID==0 select new { forum.Title, forum.ForumID, LastPostTitle = p.Title, LastPostAddedDate = p.AddedDate }).OrderBy(o=>o.F...
I want to get IQueryable<> result when executing stored procedure. Here is peace of code that works fine: IQueryable<SomeEntitiy> someEntities; var globbalyFilteredSomeEntities = from se in m_Entities.SomeEntitiy where se.GlobalFilter == 1234 select se; I can use this to apply global filter, and later use result...
Hello All: How can we aggregate function (MIN, MAX, COUNT etc) in Entity framework 3.5 in .net. Thanks Ashwani ...
Hello , You wrote: "I would use an ApplicationController which instantiates the LoginViewModel and shows the LoginView. When the user proceeds with the login screen the ApplicationController closes the LoginView and shows the MainView with its MainViewModel. How this can be done is shown in the sample applications of the WPF Applicati...
the use case that I'm concerned with in this post involves iterating over a large number of entities (100K+) returned from a query. Given the following code snippet: var query = from c in context.Customers select c; foreach(var customer in query) printCustomerStatement(customer); In this example it's clear that the the customer i...