i am calling stored procedure through entity model like result=ctx.spname(parmas), i am expecting 0 or 1 as a result after the execution of sp, but its returning unknown values like 178 for number records.
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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'm wondering about if there is a difference (in performance) when I use:
User usr = (from u in Adapter.User
where u.Login == login
select u).FirstOrDefault();
or
User usr = Adapter.getUserByLogin(login); //stored procedure
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 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.
There are some tutorials explaining how to create a Model based on Linq to Sql or The Ms Entity Framework. Can I use my custom code for a model? If we have the controller with the code :
[Code]....
This returns a List<Movie> to the view that knows what to do with it. Is it possible that I create a method called MovieSet that returns a List<Movie> using a sql qry or a stored procedure call without the creation of an Object for this purpose ? Or do I need a Movie object? Lets say that I just to do my query, loading data into a dataTable and load that data to a list of movie objects. Because the code created by the Entity Framerwork is too big for a quick reading.
I want to use entity framework model for visual studio 2010. I am using oracle database. i was wondering if it is possible to use entity framework for oracle. If it is not possible then I will just use simple ADO.net and call stord proc and packages. I already downloaded oracle data provider for entity frameowrk from codeplex web site. I could not see oracle database option when connecting to oracle databse in LINQ to sql. can someone give me any example that connects to a sample oracle database and use LINQ to oracle
View 1 RepliesI am making a web project now. And i meet some problems working with Entity Framework. My program needs to have dynamic model. I try to explain. So i have classes and database is created from them. At the beginning of work program checks in folder Modules for assemblies and looks for classses that needs to be created as tables in database(this classes have to become a part of ef model). And i need at runtime create database.If some new classes was added so add this tables to database, but not recreate it(as it is made by default). If i delete classes the tables are not deleted.
View 2 RepliesGenerally what is m.v.c model in software application development and entity framework in asp.net and are these diffrent form 3 layer d architecture(UI layer, Business access layer, Data access layer)
View 2 RepliesCan I generate entity framework model by clicking button in browser in client-side and save it back to web server PC?
View 2 RepliesI want to use entity framework model for visual studio 2010. I am using oracle database. i was wondering
if it is possible to use entity framework for oracle. If it is not possible then I will just use simple ADO.net and call stord proc and packages.I already downloaded oracle data provider for entity frameowrk from codeplex web site.can someone give me any example that connects to a sample oracle database and use LINQ to oracle
I am using C# with Entity Framework Model. I want to fill a textbox (tbPrepProbComment.Text ) with a string (S0PrepProbSolveComment) from a table (EightDProject). I'm getting the key for the EightDProject from a textbox (SelectTrackingNumber). I'm not sure my query is working because when I look at the query result ( project ) I see the error" 'mykey' could not be resolved in the current scope or context. Make sure that all referenced variables are in scope, that required schemas are loaded, and that namespaces are referenced correctly." If the query was working I dont know how to pull the field from the distinct row it should return and put it in the textbox. I've tried the line tbPrepProbComment.Text = project.S0PrepProbSolveComment; Here is my code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.Objects;
namespace EightD1
{
public partial class Page1 : System.Web.UI.Page
{
public int mykey;
public string comment;
public object obj;
// the entity framework model
EightDdbEntities EightDP = new EightDdbEntities();
protected void Page_Load(object sender, EventArgs e)
{
SelectTrackingNumber.Focus();
}
//When the project id has been selected get projectdata and bind to page data holders
protected void SelectTrackingNumber_TextChanged(object sender, EventArgs e)
{
BindData();
}
private void BindData()
{
try
{
mykey = Convert.ToInt32(SelectTrackingNumber.Text.ToString());
}
catch
{
mykey = 0;
}
ObjectQuery<EightDProject> project = EightDP.CreateQuery<EightDProject>(
"SELECT DISTINCT p FROM EightDProjects AS p WHERE p.EightDID = mykey ");
//tbPrepProbComment.Text = project.S0PrepProbSolveComment;
}
}
}
I have a aspx page that only has a button and a button click event.
My code behind looks like this
[Code]....
This code works fine if I have no insert stored procedure mapped to Table UBOtest in the EntityDataModel.However, when I map the stored procedure to the EntityDataModel and add UBOtestinsert I get an error that reads "An error occured while updating the entries. See the inner exception for details.">/P>
Then the innerException message is "Invalid object name 'UBOtest'
Here is the stored procedure [Code]....
I will enclose to screen snapshots...the first my mapping screen. the second is when I right click stored procedures in the Model Browser and right click stored procedure UBOtestinsert. -- it does not show any columns....should it?
[Code]....
I can't to understand clearly how to create strong and quickly application using EF. For example, I have class ForumPost (table ForumPost) for select one of record I write method like:
public ForumPost ForumPost(int ForumPostID)
{
return
(from i in _dataContext.ForumPostSet
where i.ForumPostID == ForumPostID select i).First();
}
all works. But on page (I use ASP.NET MVC) I should display info from another linked tables, ForumName (each post have ForumID) etc. So, I modify this method to:
public ForumPost ForumPost(int ForumPostID)
{
return
(from i in _dataContext.ForumPostSet
.Include("ChildPosts").Include("ParentPost").Include("Users").Include("Forums").Include("Tags").Include("ForumPostPolls")
where i.ForumPostID == ForumPostID select i).First();
}
ok, all works. Then I want to make some actions in model with ForumPost, i.e.
public void RootPost(int PostID, ref Models.ForumPost Root)
{
ForumPost post = ForumPost(PostID);
if (post.RootPost != null)
{
Root = ForumPost(post.RootPost.ForumPostID);
}
else
Root = post;
}
it works too. But problem is in speed. I not need in RootPost all those includes. So, I should to create one more method like:
private ForumPost ForumPostIncludes1(int ForumPostID)
{
return
(from i in _dataContext.ForumPostSet
.Include("ChildPosts")
where i.ForumPostID == ForumPostID
select i).First();
}
then ForumPostIncludes2, ForumPostIncludes3 etc... second way - redesign RootPost with LINQ expr, not with call another method. But in this way difficulties to change DB. third way? How to do it correctly?
How can i insert,update and delete records using entity framework data model.
View 1 RepliesHow can i make and call function using this stored procedure?
alter PROCEDURE [dbo].[select_value]
-- Add the parameters for the stored procedure here
@Keyword varchar(1000) output,
@ResultHead varchar(1000) output,
@Year int
[Code] ....
I'm working on a new project where I have the luxury of working from a Model to Database approach using Entity Framework 4.
The project I'm working on is taking an agile approach where different phases will be rolled out over time.
Will the Model First approach work in my case? I noticed when you "Generate Database from Model" it recreates the entire schema from scratch which will obviously wipe all the data that is in the db. I was hoping for a more "Update Database from Model" approach where the db would just be altered to reflect the changes rather than recreated
I am new to MVC framwork and have a big project on my hand.The MVC given a inbuilt membership provider .But I want to a custom database account management of users like admin user,subadmin user and site users.provide me functionlity(total step by step ) about login module with work with stored procedure and how i validate valid user login in the site and redirect from home page with displaying username etc.
View 3 Repliesi joined together more than one entity: Customer, Personel etc. i used inner join structures. if i look adonet entity framework ,5 entities are generated. i need to run this SP in C# side:
[Code]....
LOOK BELOW PİC : you can understand it :
MY C# codes: [Code]....
How can i get all joined data from sql with using randevu.GetRandevular(customerID
I have a stored procedure that generates a float value. I've added the stored procedure to my edmx file and created a function import, but the function isn't showing up in the object browser or via intellisense.
I'm using Visual Studio 2010 and I've verified that the stored procedure works in SSMS. Here is the current stored proc I'm using:
[Code]....
How do I use a stored procedure to change one or more (but not all) fields of a entity in EF4? I have a stored procedure "ChangePassword" taking a username and and a password as parameters and a User entity containing properties for Username and Password as well as other properties. I want to be able to use this stored procedure from a function to update the password from a function in one of my repositories. How to do this?
View 4 RepliesI have a stored procedure that search a view using full text.
I'm trying to map the results to an existing Entity (Sales), where I mapped the column MivType to SaleType (as it makes more sense, and I want to keep db names away from my web site). The stored procedure is mapped to a Function Import, and I've defined its ReturnType to Sales.
This work well as long as the entity has the same property names as fields names.
Here's my problem: when I change the property's name, I get the following error after running the imported function:
The data reader is incompatible with the specified 'Model.Sale'. A member of the type, 'SaleType', does not have a corresponding column in the data reader with the same name.
I can fix this if I change the property 'SaleType' to 'MivType' on the entity, but why should I do that? Isn't that what the mapping is for?
This means I have to use the exact same names on the stored procedure and the entity, so in effect, the mapping is ignored (I have names like YzrName, MivYaad, etc, and I don't like it).
Is there a simple way around this? I don't want to use the db names on my application, and prefer not to change the stored procedure...
I have one stored procedure, now i want to call it in my entity framework page. How can i do it.
ALTER PROCEDURE [dbo].[select_bool]
-- Add the parameters for the stored procedure here
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
SELECT 1,NEWID() as mynew
END
I have a stored procedure that receives 2 parameters and returns 3 columns.
Here is how I added the SP:
1. Added SP to entity model (.edmx) via update model from DB.
2. Did a Function Import -- selected my SP, clicked "Get Column Information" and then created a new complex type (myStoredProcedureName_Result) which I assigned.
3. My LINQ is the following:
[Code]....
am new to entity frame work and having a hell of time building a stored procedure that insertsa value into a table using a Scalar stored procedure and returning the new ID which is a Unique Identifier. I am trying
[code]....
