Entity context
WebLong and short, don't do this. If you're just trying to factor out this code, you have better options. For example, you can actually just add methods directly to your context. public class ApplicationDbContext : DbContext { ... public bool HasDota2Account (string id) { return Dota2Accounts.Any (m => m.ApplicationUserId == id); } } Then, in your ... WebSep 11, 2009 · Adding the following line will spit out the generated SQL (along with additional execution-related details) in the Visual Studio output panel: using (MyDatabaseEntities context = new MyDatabaseEntities ()) { context.Database.Log = s => System.Diagnostics.Debug.WriteLine (s); // query the database using EF here. }
Entity context
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WebWhen you do context.Entry(entity).State = EntityState.Modified;, you are not only attaching the entity to the DbContext, you are also marking the whole entity as dirty.This means that when you do context.SaveChanges(), EF will generate an update statement that will update all the fields of the entity.. This is not always desired. On the other hand, … WebAug 26, 2024 · First off, I'm assuming you have read the article "Multithreading and the Entity Framework" on MSDN.. Solution #1 is almost certainly the safest from a threading perspective, since you are guaranteeing that only one thread is interacting with the context at any give time.
WebJan 25, 2014 · If we want to dispose the context within each each method, I think you can do that by realizing the data, i.e. by reading it all into a concrete object such List or EnumerableQuery, before you dispose the context ... something like this (untested code ahead): public IEnumerable GetAll () { using (Context context = new Context ... The recommended way to work with context is to define a class that derives from DbContext and exposes DbSet properties that represent collections of the specified entities in the context. If you are working with the EF Designer, the context will be generated for you. If you are working with Code … See more The lifetime of the context begins when the instance is created and ends when the instance is either disposed or garbage-collected. Use using … See more By default, the context manages connections to the database. The context opens and closes connections as needed. For example, the … See more
WebFinds an entity with the given primary key values. If an entity with the given primary key values is being tracked by the context, then it is returned immediately without making a request to the database. Otherwise, a query is made to the database for an entity with the given primary key values and this entity, if found, is attached to the ...
WebYou should pass that in as a parameter and store a reference to it: public Repository (MyDbContext myCtx) { context = myCtx; this.dbSet = context.Set (); } The second thing you have to do is change your repository to change the GetAll () method to return IQueryable instead of ICollection. sim racing pedals canadaWebIf the EF connection string is stored in your web config file, you can assign it to a SQL Data Source with this code: var connString = ConfigurationManager.ConnectionStrings ["MyDataEntities"].ConnectionString; EntityConnection ec = new EntityConnection (connString); var storeConnect = ec.StoreConnection; SqlDataSource1.ConnectionString ... sim racing reunionWebSep 17, 2014 · To update an existing entity, all you need to do is set the tracking state to Modified. According to the EF6 docs: If you have an entity that you know already exists in the database but to which changes may have been made then you can tell the context to attach the entity and set its state to Modified. For example: razor swing scooterWebFeb 7, 2014 · 1 Answer. In this problem, it was a simple omission from the base context. public EntityContext () : base ("name=MonsterContext") { } public EntityContext (string tableName) { this.TableName = tableName; } This call is necessary if you want to call a specific connection string from the app.config. sim racing playseatWebOct 16, 2012 · Your DbContext derived class is actually managing at least three things for you here:. the metadata that describes your database and your entity model, the underlying database connection, and; a client side "cache" of entities loaded using the context, for change tracking, relationship fixup, etc. (Note that although I term this a "cache" for want … razor switchedWebMar 5, 2014 · Instead of destroying the context and recreating one, I found this allowed me to get fresh data with the proxies working: _db.Entry (entity).State = EntityState.Detached; The logic behind it was - my update attached the entity so it would track changes to it. This adds it to the local store. razors wellesbourneWebFeb 1, 2024 · The entity context object. Entity-specific functionality can be accessed via a context object of type IDurableEntityContext. This context object is available as a parameter to the entity function, and via the async-local property Entity.Current. razors with no razor burn