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Datacontext Accessed After Dispose Linq Data Source


Am I interrupting my husband's parenting? I fixed it my changing some "select" query to "select new { ... }". What should I do when the boss "pulls rank" to get their problems solved over our customers' problems? Visit our UserVoice Page to submit and vote on ideas! this contact form

Why had Dumbledore accepted Lupin's resignation? Browse other questions tagged c# asp.net sql-server linq-to-sql linq-to-objects or ask your own question. You can even send a secure international fax — just include t… eFax Using, Creating and Modifying Styles in Microsoft Excel Video by: Bob Excel styles will make formatting consistent and This is because, when DataAccess.GetCategoryNames() returns, the query is not executed yet, but the DataContext object within the method is disposed.

Datacontext Accessed After Dispose Linq Data Source

Object name: 'DataContext accessed after Dispose Hot Network Questions How to deal with a coworker that writes software to give him job security instead of solving problems? asked 5 years ago viewed 15571 times active 5 years ago Get the weekly newsletter! But invoking UI.Print() always throws an ObjectDisposedException: Cannot access a disposed object. One way to solve this is by creating a new context and use context.Attach(entity).

Email: (never displayed)*Email is optional, but if you enter one at least make sure it is valid. (will show your gravatar) Comment: *I do want to hear your thoughts. Determine maximum frequency of input signal to make system LTI What do ^$ and ^# mean? I had previously used the ToList() to avoid this problem. Cannot Access A Disposed Object Sql Server When it is executed it must be inside the data context...

Here the first way is the simplest: internal static IEnumerable GetCategoryNames(params int[] ids) { using (NorthwindDataContext database = new NorthwindDataContext()) { IQueryable source = database.Categories; return source.Where(category => ids.Contains(category.CategoryID)) .Select(category => Is it unethical to poorly translate an exam from Dutch to English and then present it to the English speaking students? In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms http://stackoverflow.com/questions/12254707/linq-to-sql-cannot-access-a-disposed-object-returning-a-new-created-object Doing Load() after will make a second request to fetch the data.

Fernando // Reason why this code does not work. public IQueryable GetThemes() { // The using statement creates a DataContext, you are missing the new keyword using (DataContextName context The error occurs in the get of seller. Object tracking will be explained in the next post. You're probably accessing the object outside the using block where the DataContext is created.

Datacontext Accessed After Dispose C#

For example, in the above LEFT JOIN query, when constructing the anonymous type its properties (fields) should be specified one by one. http://stackoverflow.com/questions/4328594/datacontext-accessed-after-dispose Creating a table with FIXED length column widths Player claims their wizard character knows everything (from books). Datacontext Accessed After Dispose Linq Data Source Browse other questions tagged c# linq-to-sql or ask your own question. Deferredloadingenabled Linked 0 Error when doing two calls from DB Related 2Cannot access a disposed object4Cannot access a disposed object0Cannot access a disposed object0linq to sql Cannot access a disposed object.

The content you requested has been removed. weblink Friday, February 22, 2008 2:42 PM All replies 0 Sign in to vote Can you explain what you mean by 'batch process' or 'run it in a batch' versus running it iptables not dropping by IP and port? Object name: 'DataContext accessed after Dispose.'. Deferredloadingenabled Datacontext

Console.WriteLine(product.Category.CategoryName); // product.Category is loaded. } It can be turned off by setting DataContext.DeferredLoadingEnabled to false: using (NorthwindDataContext database = new NorthwindDataContext()) { database.DeferredLoadingEnabled = false; Product product = database.Products.First(); Console.WriteLine(product.Category.CategoryName); share|improve this answer answered Jul 6 '12 at 15:47 DaveShaw 30.1k665104 I normally wrap them in a class, so as the class is active your database connection will be Determine maximum frequency of input signal to make system LTI Which movie series are referenced in XKCD comic 1568? navigate here in my GUI private void InitializePage() { cbCategory.DataSource = stock.StockCategory.Get(); } in Datamodel public IEnumerable Get() { using (leDataContext db = new leDataContext()) { try { var r = from s

When a query is executed and data is returned, by default only the “native” fields are actually fetched from the database. Connect with top rated Experts 13 Experts available now in Live! I know it has something to do with DataContext.

SELECT [t0].[CategoryID], [t0].[CategoryName], [t0].[Description], [t0].[Picture] FROM [dbo].[Categories] AS [t0] -- Queries products of the first category through the association (foreign key).

Object name: 'DataContext accessed after Dispose.' Hot Network Questions Newton's second law for individual forces Does トイレ refer to the British "toilet" or the American "toilet"? Object name: 'DataContext accessed after Dispose.'.

at System.Data.Linq.DataContext.GetTable(Type type) at System.Data.Linq.CommonDataServices.GetDataMemberQuery(MetaDataMember member, Expression[] keyValues) at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.ExecuteKeyQuery(Object[] keyValues) at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.Execute(Object instance) at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.DeferredSource.GetEnumerator() at System.Data.Linq.EntitySet`1.Load() at System.Data.Linq.EntitySet`1.get_Count() at System.Runtime.Serialization.XmlObjectSerializerWriteContext.IncrementCollectionCountGeneric[T](XmlWriterDelegator xmlWriter, Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Asked by: System.ObjectDisposedException: Cannot access a disposed object.Object name: 'DataContext accessed after Dispose.'. You could do something like this: public IEnumerable GetHeaders() { using(NSFChecksDataContext context = DataContext) { foreach(var header in context.BatchHeaders) { yield return header; } } } The second block works because

Any ideas how to handle this? Center trace between two pads Is adding the ‘tbl’ prefix to table names really a problem? Newton's second law for individual forces What do ^$ and ^# mean? his comment is here Object name: 'DataContext accessed after Dispose.' On researching I found the article http://leedumond.com/blog/about-disposing-the-datacontext/ which states: "Don't forget, LINQ to SQL is smart -- it only gets the data your application actually

Tuesday, July 27, 2010 10:39 AM 0 Sign in to vote public IEnumerable GetAllContacts() { IOrderedQueryable contacts; using (DataContext dataContext = new DataContext(dataService.TenantDbConnectionString)) { contacts = ASP.Net page1WCF “DataContext accessed after Dispose”2Getting around “DataContext accessed after Dispose” error in ASP.NET MVC View2update object created in another datacontext7How do I correctly manage the disposing of a DataContext?0DataContext accessed It is important to clean up you're resources. I'm using this method to populate a RadGrid.

LINQ to SQL classes map the foreign key associations among your database tables using special properties. After that happens, the data context isn't needed anymore. Can anyone explain why the second method will work but not the first? Was there no tax before 1913 in the United States?

asked 4 years ago viewed 1116 times active 4 years ago Related 653Entity Framework vs LINQ to SQL287What is the syntax for an inner join in LINQ to SQL?14DataContext Accessed After Linked 26 C# Linq-to-Sql - Should DataContext be disposed using IDisposable Related 38LinqPad, using multiple datacontexts1How long should I keep my LINQ DataContext around? share|improve this answer answered Dec 1 '10 at 20:13 Steven Robbins 22.3k65583 add a comment| up vote -1 down vote return headers.AsEnumerable(); should work, because by default, a linq query returns When you need to make an array larger it creates a new array copies the elements to the new array and then the old one is discarded. 0 Message Author

Join them; it only takes a minute: Sign up “Cannot access a disposed object” up vote 5 down vote favorite 2 I have a problem while accessing a association object from IQueryable results = source.Where(category => category.CategoryID < 5); // Foreaches the IQueryable object, which implements IEnumerable. // Query is starting translaion and execution. How can I prove its value? Basically I was doing the following:   using (MyDataContext dc = new MyDataContext()) { //Here I return my data }   when I tried to access that data, all the properties

using (var DC = new MyDataContext()) { TimeSlot timeSlot = DC.TimeSlots .Where(w => w.FacilityID == facilityID .OrderByDescending(o => o.LoadDate) .FirstOrDefault(); return timeSlot; } // Much later... If I receive written permission to use content from a paper without citing, is it plagiarism? Cannot access a disposed object. Now, and here is the most serious part of my answer: I absolutely can't stand seeing queries that instantiate data contexts to execute.

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