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Data Points: Designing an Entity Data Model

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net
 

With the Entity Framework, developers are given more flexibility by being able to design around a conceptual model rather than a relational data model. To get started, you need to know how to design an Entity Data Model. John Papa walks you through that process.

John Papa

MSDN Magazine February 2008




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Data Points: Demystifying Entity Framework Strategies: Model Creation Workflow

  

The Entity Framework now includes more ways than ever to create a conceptual model, starting first with just your code, a model created with the visual designer, or a legacy database. We help you choose which one's right for you.

Julie Lerman

MSDN Magazine May 2011


Binding WPF Controls to an Entity Data Model

  
In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Binding WPF Controls to an Entity Data Model

  
In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

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Entity Data Model and database view returning the same columns as there are in a table

  

When adding a stored procedure into the Entity Data Model I can select whether the procedure returns a scalar, a (new) complex type or one of the entity types I already defined. 

How do I do something similar for a view?


I mean assuming I have a view like this

CREATE VIEW FilteredFoos as SELECT Foo.* FROM Foo join ... WHERE ...

(that is a view that implements some involved filtering, but returns all columns from one table) how do I add it to the project so that I can use the entity set, but get the Foo objects, not some new FilteredFoo objects.


var foos = myDB.FilteredFoos.Include("Bar").ToList();

foreach (Foo foo in foos) { ...


Thanks, Jenda


Can I create an ADO.NET Entity Data Model for a MySQL database using Visual Web Express 2010?

  

Can I create  an  ADO.NET Entity Data Model for a MySQL database using Visual Web Express 2010?

If yes, are there any documentation or tutorials?

Thanks.


How do you create a ADO.NET Entity Data Model for a MySQL database using Visual Web Express 2010?

  
 

Can I create a ADO.Net Entity Data Model for a MySql(5.0.1) Database using a Visual Web Express 2010? If yes, can anyone please let me know how to do this.


entity data model

  

hi.

in every table's table adapter i had added 4 storedprocedures(CRUD), then i could call this procedures from objectdatasource select,update,insert and delete commands and assign parameters to session objects;

now i moved from dataset to entity framework model.

i want to now how assign a select command to entitydatasource or objectdatasource from imported functions in my entity data model?

 

tanks.


get data from entity model in rest service

  

Hi,

I created a rest service and a database in entity model (edmx)..

i want to retrieve data from database and show it in client using a rest service...

 

is it valid to store like

c1 =

 

Convert.ToInt32(context.ExecuteStoreQuery<string>(

How to update Domain Service from Entity Data Model?

  

Hi guys,

So I'm using Entity data model to reflect my database and I generate Domain service from my Entity data model.

I understand that if I have changes in my database, I can just choose "Update Model from Database", but there is no "Update Domain service from Model" option available.

How should maintain my domain service? I'm not going to delete away it and regenerate it whenever there are some changes, right?

I need to know what if

- I add in new table in my database, how should I update from database-->model-->domain service?

- I add in new fields in my table, how should I update from database-->model-->domain service?

Thanks.


Populate entity data model from database

  

I've been using entity data models for quite a few sections of my website and find it really good for saving things to the database.

After searching for a while, I can't seem to find a good way to populate a new instance with data from a database other than using a data reader. E.G:


MyClass.myID = reader("myID")


Am I missing something?


How use sum in Entity Data Model with linq?

  

hi

i have a database with 4 table aspnet_Users, Forum, Topic, Post thay are related:

aspnet_Users with Topic by UserId

Forum with Topic by ForumId

Topic with Post by TopicId

i created a linq to get data from Database like:

Dim db As New MelorinEntities()
        Dim Topics = From t In db.Topic _
                     Join u In db.aspnet_Users _
                     On t.UserId Equals u.UserId _
                     Where t.ForumId = _ForumId _
                     Select t.UserId, t.TopicId, t.Name, t.IsLock, t.NumberOfView, _
                     u.UserName


 

 now i need to get also how meny post are in a topic but i don't know how to write the querry

can you please help me?

thanks

 


Dynamic Data using Code First Entity Framework Model

  

I have used Dynamic Data before using LinqToEntity where my Entity model used the Data First model and the GUI.  Now I am trying to use the Code First model witht he Entity CTP 4.  I have my model created and created a new Dynamic Data site.  I read that I need to replace the default RegisterContext call:

DefaultModel.RegisterContext(typeof(PriceLoaderContext), new ContextConfiguration() { ScaffoldAllTables = true });

with

DefaultModel.RegisterContext(new DomainModelProvider(typeof(PriceLoaderContext)), new ContextConfiguration() { ScaffoldAllTables = true }); 

When I search further on DomainModelProvider, I find that it is part of the WCF RIA. Is this correct? Is this what I need for this to work? Has anyone else done this and got it to work?


Thanks,
Fred

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