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C# Cannot Attach An Entity That Already Exists

This is true whenever you pull an already existing object from a table. After this statement objActualNew = varTempInden; your new variable objActualNew is referencing to existing entity object. Rick you have a great blog Michael May 10, 2008 # re: LINQ to SQL and attaching Entities I found it easier just to create one DataContext for the request like using(dbcontext db1 = new dbcontext) //create your new db context objet { db1.RollCalls.InsertOnSubmit(rollCallObj); db1.SubmitChanges(); } If this post answered your question or solved your problem, please Mark it as

Waqas March 31, 2008 # re: LINQ to SQL and attaching Entities Hi, im facing a same problem! Am I not telling LINQ to compare the two objects and assume the differences to be changes? Rick Strahl August 15, 2007 # re: LINQ to SQL and attaching Entities @Matt - see follow up post:http://www.west-wind.com/weblog/posts/135659.aspxmore detail there. Join them; it only takes a minute: Sign up Cannot attach an entity that already exists up vote 3 down vote favorite 1 I get this error whenever i try to http://stackoverflow.com/questions/2605657/cannot-attach-an-entity-that-already-exists

I resolved this issue by initializing the datacontext object in each iteration. Solution 1 Accept Solution Reject Solution 1.In order to add new records in the database you have to create new objects in your foreach loop. 2.A 2nd problem is the fact that you Conditional Linq Queries Attaching entities to data contexts Can you use LINQ tools such as SQLMetal with an access database? Is there a name for the (anti- ) pattern of passing parameters that will only be used several levels deep in the call chain?

I just don't understand what could possibly be so hard about re-attaching an object. In this article we will try to know more about SOAP (Simple Object Acces… .NET Programming Key concepts of Delegate using C# Article by: ROMA It was really hard time for Reply thelmaeskolo None 0 Points 4 Posts Re: Error saying Adding an entity that already exists in c# Aug 02, 2012 08:15 AM|thelmaeskolo|LINK It's rollcallID which auto-increments and it is an i have been stuck on this for days now and I can't think of any other way to fix this.

I get dibs on "CLANQ"...I'm sure that what we've been trying to do will be covered in RTM... So, is this the way it's supposed to work or a bug? Solved SubmitOnInsert cannot add an entity that already exist LINQ Posted on 2008-12-11 .NET Programming C# 1 Verified Solution 5 Comments 2,169 Views Last Modified: 2013-11-11 I get the following error: http://stackoverflow.com/questions/8887158/cannot-attach-an-entity-that-already-exists Huh?

Should I start using LINQ To SQL? Browse other questions tagged c# asp.net linq linq-to-sql or ask your own question. Suggested Solutions Title # Comments Views Activity Need some help with Microsoft Visual Studio C++ 2003 5 24 31d ASP.NET C# load a .js file and process some data in code Drag your table to the designer in VS, or hand craft it if you aren't lazy3.

LINQ to SQL uses minimal updates with optimistic concurrency checks; i.e. Linux questions C# questions ASP.NET questions fabric questions SQL questions discussionsforums All Message Boards... No successI found a solution, I create one DataContext per record to update in database....It's not perfect but it works as expected. Reply Vivek J Pand...

Under load test numbers of data reader requests where nearly 3 times higher compared to equivalen LINQ code.To be fair that's not LINQ's problem - that's databinding against objects which has I have the feeling that LINQ is very poor when you work with disconnected record.What a pity ? Is it possible to write division equation in more rows? The manager knows all the fields involved and at the very least should be able to create an update statement that checks everything or in the case of comparing two entitities

Hopefully I'm just being dense and there are some workarounds for some of these issues, but reading a number of other posts on this 'detached' issue at least it doesn't appear Wait... Draw some mountain peaks How do I sort files into a sub-folder based on filename part? Borders table Latex Assigning a unique representation to equivalent circular queues How do I sort files into a sub-folder based on filename part?

How small could an animal be before it is consciously aware of the effects of quantum mechanics? Christophe Keller February 26, 2010 # re: LINQ to SQL and attaching Entities In that case you need to reattach the child entities or collections too. When you bind objects any databinding has to use Reflection for retrieving every single value displayed in the databound control.

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more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Why does Friedberg say that the role of the determinant is less central than in former times? Center trace between two pads Looking for a nice example for normal subgroups Why put a warning sticker over the warning on this product? Do you have any more info on that data?Re: anonymous types, it's not so much that it can't be worked around, but we'll be finding ourselves not being able to get

Check the following code.TimeManagerDataAccessDataContext objTimeManagerDataAccessDataContext = new TimeManagerDataAccessDataContext();public void AddNewSupportingDocument(IEnumerable objSupportingDocument ,int intStatusId) { if (objSupportingDocument != null) { DeleteDocuments(intStatusId); foreach (var SupportDocument in objSupportingDocument) { objTimeManagerDataAccessDataContext = new TimeManagerDataAccessDataContext(); objTimeManagerDataAccessDataContext.GetTable Visit our UserVoice Page to submit and vote on ideas! I can use this code and it won't bomb outright: context.tt_customers.Attach(customer); But it also doesn't do anything on the server. Equally so is any claim that this is proper functionality and somehow due to LINQ's candidacy for some particular usage not applicable to given examples.

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using (UserDivDptGrpCscDataContext usrDptCtx = new UserDivDptGrpCscDataContext(GlobalMethods.SqlConnectionString)) { //Add Departments for a User to Wednesday, July 04, 2012 6:58 AM Reply | Quote 0 Sign in to vote Cloning an entity object is not that simple because of relationship and navigation mapping in entity context. asked 6 years ago viewed 4270 times active 4 years ago Related 0Attaching entities to data contexts14linq2sql: Cannot add an entity with a key that is already in use0Cannot add an

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