Web Forms :: Entity Framework Multiple Rows Update

Feb 24, 2013

I am using Entity Framework 4.0. I want To write a query for multiple row update.

Then how to write Query for multiple row update in Entity Framework.

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Similar Messages:

How To Insert Multiple Rows Using Entity Framework In Studio 2008

Oct 7, 2010

i'm trying to use Entity Framework to insert into SQL SERVER 2005, using Visual studio 2008.the following codes are a Button onclick event,I want to insert into DB multiple rows at a time


however this does not work, it seems we can only insert into DB only one row at a time

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DataSource Controls :: How To Save Multiple Rows Using ADO.NET Entity Framework

Mar 23, 2010

public void saveOptionalCourses( ArrayList coursesAdded, int studentID)
StudentOptionalCoursesXRef XRefObject = new StudentOptionalCoursesXRef();
using (var EntityObject = new SchoolProjectEntities2())
foreach ( string list in coursesAdded)
XRefObject.StudentDetails = EntityObject.StudentDetails.Where(c => c.StudentID == studentID).First();
XRefObject.OptionalCourses = EntityObject.OptionalCourses.Where(c => c.OptionalCourseName == list).FirstOrDefault();

with this above method and could save only last row that am returning remaining rows are iterated but are not saving on to database

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Entity Framework -Update Entity When Another Entity Is Updated

Jun 30, 2010

I have an EDM, it includes the entities extension and history. My goal is to use history to keep track of all the changes made to extension entity. For example, if extension with ID 223 has its property 'Name_Display' changed - I want the history entity to record this.

I'm using ASP.NET with VB.NET. Where in my code do I put the hook to say, "update the history entity" and what should that hook look like?

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ADO.NET :: Entity Framework - Entity Stored Procedure Mapping - Can't Update

Feb 10, 2011

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.

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How To Simply Update Entity In Entity Framework

Sep 21, 2010

I'm writing a custom .NET MembershipProvider (not the built in one) and trying to update using Entity Framework. But of course i have no access to (Try)UpdateModel. How can i update it?

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In MVC And Entity Framework, How To Avoid Duplicate Rows

Mar 7, 2011

I'm new to ASP.NET MVC and I'm trying to implement an address manager.I'm using Linq2Entity Framework. I've got a table with contacts and one with phone numbers. These two tables are linked by a contact_has_phone_number table. The Entity Framework enables me to get all phone numbers that are assigned to one contact. This is done by calling contact.PhoneNumbers which returns a collection of phone numbers.

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Can Insert Muiple Rows Into Table Using Entity Framework

Oct 6, 2010

i'm trying to use Entity Framework to insert into SQL SERVER 2005, using Visual studio 2008.the following codes are a Button onclick event,I want to insert into DB multiple rows at a time


however this does not work, it seems we can only insert into DB only one row at a time

View 2 Replies

C# - How To Update Entity Framework

Mar 20, 2011

I have been updating my Entity Framework by simply right clicking and clicking on "update model from database". I usually go under the "Add" tab and then click the tables and click finish. I also use "refresh" sometimes as well. What are the differences between these? and also when I do refresh or add sometimes the entity comes out wrong or keeps some of the old information in cache, how can I just get the entity to match my database and clean out any of the old cached things.

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Can Check Rows Returned In A QueryString Parameter Based Entity Framework Query

May 29, 2010

I need to check if any rows are returned in a QueryString here's what I have so far.not sure what code to put to see if the row count is greater than 1

private void BindDataToGrid()
//MessageBoardEntities3 is ThemeableAttribute connection string name
int TID = Convert.ToInt32(Request.QueryString["ThreadID"].ToString()); // if Post ID is int
var context = new MessageBoardEntities3();
gvPosts.DataSource = from p in context.Posts
where p.ThreadID == TID
select new { p.Post1, p.PostID };
lblNoPosts.Text = "No posts found for this thread.";

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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


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.

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Entity Framework Update Methods

Sep 28, 2010

I have a few entities I'd like to update at the same time. However I'd like to write individual update methods in each classes partial class file, for each entity and call them all at the same time. For example:

public sub UpdateEntity1()
end sub

public sub UpdateEntity2()
end sub

public sub UpdateEntity3()
end sub

public sub UpdateAll()
end sub

My question is how do I manage the object context? do I create one object context in the class I'm calling UpdateAll(), then pass it as a parameter to each individual update method? Or do I create a new context for each Update? I'd like to use the same context because the object are related, and this would decrease the db calls to update all the records.

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Forms Data Controls :: How To Add Gridview Rows Data To Database Using Entity Framework

Aug 3, 2010

I've a gridview with 6 coloums. First col is dropdown list and rest are text boxes.aspx page looks like this


I've a created a class and bounded to grid view in my Business LayerThe dropdown list was bounded to another table by using gvExpense_RowDataBound eventNo.of rows in gridview depends on no. of rows in expensetype table

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Forms Data Controls :: How To Update A DataTable And Update Multiple Rows Due Sorting

Jan 17, 2010

i want to build a datagrid bound to a datatable with several columns. One column has only a dropdownlist with the number of the rows in the datatable.

Here a samplescreenshot:


I know how to bind the columns to a grid and its no problem to create such a dropdown list with the content for me, too. But i dont know how to sort the complete datatabl after changing one value of one dropdown listbox.

So, how can i resort the values of a datatable column based on a given value and the datarow id?

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Forms Data Controls :: Update Multiple Rows Of Gridview On Click Of Update Button?

Jul 10, 2010

I want to update multiple rows of gridview (only price field. for that i have added textbox) on click of update button which is outside of gridview.I have done following way

<asp:LinkButton ID="lnkUpdate" CssClass="BlueButton" runat="server" OnClick="lnkUpdate_Click">Update</asp:LinkButton>


Up to this its working fine but when no textbox updated then no need to go in for loop so i am looking for confiramtion before updating rows please help me how to do that becausei am less aware with javascript. another problem is textbox value disappear when page index changed how i can retain that values.

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C# - Only Update Actually Updated Fields In Entity Framework?

Sep 13, 2010

Quite a common use case, it seems, is when re-populating an object from a form is to go

myobj.Name = "textbox value";
myobj.Content = "textbox content";

But, name may not have changed, it may only be a change to the content textbox.

The problem is that entity framework treats Name as changed just because I've set it's value, regardless of whether I've set exactly the same value or not.

Ideally, I would like EF to only mark things as changed if they genuinely have changed.

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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?

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ADO.NET :: LINQ To Entity Multiple Rows WCF?

Dec 15, 2010

I am selecting some products from database and would like to show them in client's grid using WCF. Problem is I don't know how to pass selected collection to the client since my method can't return that data type.

My method:

public class Service1 : IService1
public ProductData GetData(int value)
using( NorthwindEntities NWEntities = new NorthwindEntities()){


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ADO.NET :: Solving Optimistic Concurrency Update With Entity Framework?

Jan 16, 2011

How should I solve simulation update, when one user updates already updated entery by another user?

First user request 'Category' entityobject, second user does the same. Second user updates this object and first user updates. I have field timestamp field in database that wa set to Concurrency Mode - Fixed.

This is how I update:


Exception never jumps...How should I handle this?

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ADO.NET :: Partial Update With Stored Procedure In Entity Framework 4?

Dec 3, 2010

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?

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ADO.NET :: Entity Framework - How To Update A Running Production Environment

Feb 21, 2011

I have read some articles about the new enitity framework and I think it looks very cool from a development perspective.

considering a production environment loaded with data. How does one apply changes to the model? You cannot regenerate the model and in most large organizations, database changes are executed by DBS's and not developers. In such situaitons, it is the role of the developer to develop delta-scripts that the dba can execute.

My experiense with Hibernate (Java) and the like is that you have to pay double when using such frameworks.

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ADO.NET :: Update A Record For Multi-user App Using Entity Framework .net 3.5?

Mar 23, 2011

I have a webservice which of course has to be .net 3.5 (a side note is does anyone know why you can't create a webservice using .net 4.0?).

Anyhow it is using entity framework, which I have recently discovered was a really bad mistake to try to use this in .net 3.5.

I have a table "Licenses" with the following columns: LicenseKey, ProductCode, OrderID, Seq, UserName.

In my asp.net 4.0 application I can simply do the following to perform an update:


But it appears there is no ExecuteStoreCommand in .net 3.5 with entity framework. Can anyone explain to me how to accomplish the same thing? The thing I need to point out is that because this is a multi-user access service. I need to verify that SQL will only update the given record where OrderID and Seq is what I tell it ONLY if the UserName is already null. So if two users process the same statement at the same time only one would work and the other would not because the sql should fail (or return 0, rather than a 1) for the second one.

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Entity Framework - Use Of Self-Tracking Entities In Across Multiple Posts

Dec 14, 2010

I have a model that consists of Order, OrderLine, Product.

I want to create an Order and add OrderLines (each OrderLine related to a Product). I create the Order and add new OrderLines to it. Between posts I store the Order entity in Session (or ViewState). Just so you know I have added suppport for binary serialisation which works fine.

The relationship is therefore Order > OrderLine(s) > Product(s).

You might have already guessed what the problem is - that when I SaveChanges() I get the usual 'AcceptChanges cannot continue because the object's key values conflict with another object in the ObjectStateManager.' error.

I have referred to a number of articles online but none seem to handle this case (where I have the relationship across more than two entities) e.g. [URL].

This must be a very common requirement surely? Is there anyone out there doing the same kind of thing with Entity Framework (and without using DTOs etc)?

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Using Multiple ObjectContexts In Entity Framework 4 With The Repository/uow Pattern

Jan 17, 2011

i am using EF4 and StructureMap in an asp.net web application. I am using the repository/unit of work patterns as detailed in this post. In the code, there is a line that delegates the setup of an ObjectContext in global.asax.

EntityUnitOfWorkFactory.SetObjectContext(() => new MyObjectContext());

On the web page code-behind, you can create a generic repository interface like so ...

IRepository<MyPocoObject> ds = ObjectFactory.GetInstance<IRepository<MyPocoObject>>();

My question is what is a good approach to refactoring this code so that I can use more than one ObjectContext and differentiate between them in the code-behind? Basically i have two databases/entity models in my application and need to query them both on the same page.

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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?

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