How Much Entity Framework Is Good For Database That Contains Tables With Large Records

Jul 28, 2010

I am working with VS 2010, Entity framework, SQl-Server 2005, ASP.Net web forms. Currently, I am working on the Data access layer library which soon will be a web service, using Entity Framework collaboration with different design patterns like repository pattern and some best practices that posts in different blogs. I am also test each repository using the Unit testing project. Thumbs up! Working fine.

The thing I am worried about is, how much is good for retrieving data from a table that can contain 80-100k records ?

View 1 Replies


Similar Messages:

C# - After Calling A Stored Procedure By Entity Framework, Tables Update In Database, But Entities Remain Same

Mar 15, 2011

I created two stored procedures in SQL Server Management Studio.

First procedure add field in ProjcetsToUsers table (for many-to-many associations)

[code]....

I can delete the user from the project and then add another, and the new one is added but removed the remains.

As for data base both this function work correctly.

View 1 Replies

ADO.NET :: Selecting Coulmns From 2 Tables Using Entity Framework?

Aug 19, 2010

I have two tabels as mentioned below. I am using entity framework and vs2010.I am not able to write linq query to get data from both the tables. there is one to many relationship(for one category ther can be multiple articles).

View 1 Replies

C# - Dynamically Loading SQL Tables In Entity Framework?

Feb 18, 2011

I need to dynamically access some SQL tables hopefully using the Entity Framework. Here's some pseudo code:

var Account = DB.Accounts.SingleOrDefault(x => x.ID == 12345);

which will return me an Account object and this contains some fields called "PREFIX", "CAMPAIGN ID" and further information about the accounts are stored in separate SQL tables with the naming convention of PREFIX_CAMPAIGNID_MAIN.

The tables all have the same fields so I was thinking of creating a new Entity that isn't mapped anywhere and then dynamically loading it, like so:

var STA01_MAIN = new MyAccount(); // my "un-mapped" entity
DB.LoadTable('STA01_MAIN').LoadInto(STA01_MAIN);

I can now get anything about the STA01_MAIN account: STA01_MAIN.AccountId. So my question is: how do I access these tables using the Entity Framework?

View 1 Replies

ADO.NET :: Entity Framework - How To Join Tables Without LINQ And With Only String

Sep 30, 2010

I have a question about Entity Framework. answer if you know answer on this. I have such query :

[Code]....

Particularly I want to join few tables in one query, but I can NOT use LINQ and can NOT use ObjectQuery with objects mapped to DB fields inside my query. Because each entity creates dynamically. So this is what i

can NOT use : [URL]

The question is can I use something like this instead of using objects?

[Code]....

The purpose is to use Join method of ObjectQuery with syntax as in Where method :[URL]

View 2 Replies

Using Entity Framework To Connect To Multiple Similar Tables In MVC?

Jun 10, 2010

A relative newcomer to .net MVC2 and the entity framework, I am working on a project which requires a single web application, (C# .net 4), to connect to multiple different databases depending on the route of access, (ie subdomain).

No problem with this in principle and all the logic is written to transform the subdomain into an entity connection and pass this through to the Entity Model.

The problem comes with the fact that the different database whilst being largely similar in structure contain 3 or 4 unique tables bespoke to that instance.

To my mind there are two ways to solve this issue, neither of which i am sure will be possible.

1/ Use a separate entity model for each database. -Attempts down this route have through up conflicts where table/sp names are the same across differnt db's, or implicit conversion errors when I try and put the different models in different namespaces. or

2/ Overwrite the classes which refer to the changeable database objects based on the value of a base controller property.

My question is if either of theser routes can ever work in principle or if i should just give up on the EF and connect to the dtabases directlky using ADO. Perhaps there is another way to solve this problem i haven't thought of?

View 1 Replies

DataSource Controls :: Viewing Fields From Two Tables Using Entity Framework

Mar 17, 2010

I have created a .edmx for the northwind database. When I run the following statement, the correct number of detail records are retrieved and I can access the detail fields, but how do I access the order header record to view OrderDate, ShipAddress, etc...?

[Code]....

View 1 Replies

How To Load Foreign Key Referenced Tables Data Also In Entity Framework

May 3, 2010

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.

View 2 Replies

Forms Data Controls :: Entity Framework Using 2 Tables Databind() To A Gridview?

Jun 16, 2010

I am new to Entity Framework and working my way through it little by little. I think I have it figured out on how to get data into and out of 1 table at a time now the challenge is 2 tables into a gridview.
I have a user table that has a list of threads that a user can mark to track. Easy enough. Assign the userid number & threadid to a table with a push button while the user is logged in and viewing any of the posts that are on that thread. The new challange is to get only the posts that the user has marked to track. SQL easy. Entity not sure what to do.

If I make a view or stored procedure and add it to the database that would be an extra step. To join the 2 tables as in sql Select posts from posts where track.userid = @userid join track on post.userid=track.userid Seems Entity was made to avoid this type of thing. Than once the data is gathered I need to bind it to a gridview()

View 3 Replies

Adding Data Into Tables Includes Foreign Keys But Which New Row Created Entity Framework

Apr 6, 2010

Adding data into kartlar table (RehberID,KampanyaID,BrimID) is ok. But which Kart'ID created? I need to learn which Id created after adding data (RehberID,KampanyaID,BrimID) into Kartlar?

[code]...

How can I do that? I want to get data from Kartlar which data I added?

View 1 Replies

ADO.NET :: Insert Update And Delete Records Using Entity Framework Data Model?

Nov 22, 2010

How can i insert,update and delete records using entity framework data model.

View 1 Replies

Exporting Entity Framework 4 Data Model To Entity Framework 3.5?

Oct 25, 2010

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.

View 1 Replies

ADO.NET :: How To Update Database Using Entity Framework

Jan 25, 2011

I want to update database using entity framework by passing class object in one go with setting without setting object values again.

I have added data using following code

[code]....

here obj is class object which i have passed to the AddTotblTables() method

similary i want to update table in same manner by passing class object.

View 1 Replies

ADO.NET :: How To Change The Database While Using Ado.Net Entity Framework

Nov 3, 2010

how to change the database while using ADO.Net Entity Framework?

I have two identical databases. I want to change the db. Can i change it through web.Config?

Like LINQ to SQL ?

View 2 Replies

ADO.NET :: Get The Value From Database Row Wise Using Ado.net Entity Framework?

Nov 25, 2010

in my table test

Name Add
0 prinku sad
1 tommy asdsa
2 ghhgh sdsdd

now i want to select the name in the first row...am using Ado.net entity framework

empEntities db =
new
empEntities();

now how to select the name at 1

db.Tests.Name.ElementAt(1);?actuually this throws an error...

View 5 Replies

ADO.NET :: Entity Framework With Multiple Database Servers

Feb 7, 2011

We have an IVR product that reads a configuration database for callflow information. I am writing a tool for our implementation team that will allow them to add/delete/update the data in the configuration database. Once the tool is in production, the implementer will use only the production release of the tool to modify the configuration database in all four of the IVR regions (Dev, QA, Cert, and Prod). Each region has its own database with identical schemas. The tool has 'tabs' across the top for each region. If a user is currently working in the Dev region and clicks the QA tab, how do I switch my connection from the Dev db server to the QA db server?

View 3 Replies

SaveChanges() Does Not Commit Changes To The Database And Entity Framework

Nov 7, 2010

All I am trying to do is to make an update to an existing User and then save the changes to the database. I fooled around with different options and can see that I can make the change to the context during Page_Load, but it does not commit the changes to the Database.

View 5 Replies

MVC :: Display Image From Database Using Entity Framework?

Oct 1, 2010

I need to do a site similar to [URL] but don't know how to display or retrieve the images as in the above website.

View 3 Replies

ADO.NET :: Insert New Records In Tables From Dataset To Database?

Aug 27, 2010

I have 2 tables in SqlServer 2008.

Table1: T1id, SomeData

Table2: T2id, T1id, SomeData

I am using DataAdapter.FillSchema to create shema of tables in DataSet. I created DataRelation on columns
T1id in both tables.

Now when i try to Update Sql Database T1id in Table2 remains 0 and not the value of T1id in Table1.

I can successfully update Sql Database if i fill DataSet with records first (Using DataAdapter.Fill), but that's not what i want to do. I don't need "old" records in my dataset. I want to use dataset just to store all imputs from user until the proccess is done and then insert all those records "at the same time".

View 9 Replies

How To Do Caching Using Entity Framework And Can Minimize Database Hits

Dec 15, 2010

I am using ADO.NET Entity Framework 3.5 for web service.i want to know how can i caching through it and can minimize database hits?

View 1 Replies

DataSource Controls :: Use Database Instead Of MDF File With Entity Framework?

Jan 11, 2010

I transfered my data from MDF files to MS SQL Database, but I can't get it working with entity framework.

My Old connection string is:

metadata=res://*/Models.EntityModel.csdl|res://*/Models.EntityModel.ssdl|res://*/Models.EntityModel.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|TripsDB.mdf;Integrated Security=True;User
Instance=True;MultipleActiveResultSets=True"

I put all data from TripsDB.mdf to Trips table in local MS SQL 2008 Enterprise database. Also changed connection string to:

Server=WIESIEK;Database=Trips;Trusted_Connection=True;providerName=System.Data.SqlClient;User ID=Jan J. Roman

But my application throws System.ArgumentExceptio with message: The 'server' keyword is not supported.

on line:

private TripsDBEntities2 _entity = new TripsDBEntities2();where TripsDBEntities2 is Entity Framework instance.

View 2 Replies

Can Build ADO.NET Entity Framework Based On MYSQL Database

May 19, 2010

I am using MUSQL Database extensivly in my projects,

can we build ADO.NET entity framework based on MYSQL database?

View 2 Replies

Entity Framework - Connecting To Database In Server Control?

Aug 3, 2010

As a follow on from this question I'm building a custom server control to be placed on a Sharepoint 2010 master page. The idea behind this is that it will display a menu that is dynamically populated from the database. As this is a server control, I'm building it in a dll but I've run into a small snag. As it has to connect to the database, I need to store the connection string somewhere (and have it able to be configured based on target configuration (dev/test/prod). I was intending to the user the Entity Framework as my ORM but i'm confused as to where the connection string is to be stored. In a normal ASP.NET web app it goes in the web.config, but this is a server control in a external DLL.

Where do I store the connection string so that I can just build and deploy the assembly containing the server control.

EDIT:

Before I post a bounty, I have tried using an embedded resource XML file to hold the connection string and while this works, I'm curious as to if this is best practice/a better way?

View 2 Replies

C# - Using Entity Framework With Existing Business Layer And Database?

Feb 2, 2011

I have an ASP.NET application with existing business classes and a database schema. (which I would like to keep) Currently I am using ADO.NET for the DAL, but I would like to switch to some advanced technology there for easier data retrieval.

Is EF applicable to my situation? Can I use it without splitting up my business classes and auto code generation? Can LINQ to SQL solve my problem better?

All I want to do is map my existing classes to the existing tables and dont have to handle details of the data retrieval myself.

View 1 Replies

C# - Entity Framework Connection String From The Online Database?

Mar 3, 2011

I'm working on an application that is connected to the online MSSQL database and everything is working fine.The model I'm using is entity model.The problem is that I have to change the connection string from the online database to the local one,but I don't know how.Creating new model isn't an option.I tried changing the connection string in web.config,but errors are the only thing I get.

This is what I have in web.config:

<connectionStrings>
<add name="PravosudnaAkademijaEntities" connectionString="metadata=res://*
PrakModel.csdl|res://*/PrakModel.ssdl|res://*/PrakModel.msl;provider=System.Data.SqlClient;provider connection string='Data Source=HRVOJE-PC;Initial Catalog=pak_baza;Integrated Security=True" providerName="System.Data.EntityClient" />

View 3 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved