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POEntity Framework 4 SaveChanges not working and not throwing any error?
 

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  1. POEntity Framework 4 SaveChanges not working and not throwing any error?
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    <p>I am trying to use my generic repository with a "unit of work" pattern.</p> <p>Here is my work details</p> <pre><code>public class GenericRepository:IRepository { private readonly string _connectionStringName; private ObjectContext _objectContext; private readonly PluralizationService _pluralizer = PluralizationService.CreateService(CultureInfo.GetCultureInfo("en")); public GenericRepository() { this._objectContext = ContextManager.CurrentFor(); } public void Add&lt;TEntity&gt;(TEntity entity) where TEntity : class { ((DataEntities.MyTestDBEntities)_objectContext).Countries.AddObject(new Country() { CountryName="UGANDA"}); this._objectContext.AddObject(GetEntityName&lt;TEntity&gt;(), entity); } public void Update&lt;TEntity&gt;(TEntity entity) where TEntity : class { var fqen = GetEntityName&lt;TEntity&gt;(); object originalItem; EntityKey key = ObjectContext.CreateEntityKey(fqen, entity); if (ObjectContext.TryGetObjectByKey(key, out originalItem)) { ObjectContext.ApplyCurrentValues(key.EntitySetName, entity); } } private string GetEntityName&lt;TEntity&gt;() where TEntity : class { return string.Format("{0}.{1}", ObjectContext.DefaultContainerName, _pluralizer.Pluralize(typeof(TEntity).Name)); } public object Get&lt;TEntity&gt;() where TEntity : class { var entityName = GetEntityName&lt;TEntity&gt;(); return ObjectContext.CreateQuery&lt;TEntity&gt;(entityName); } public IEnumerable&lt;TEntity&gt; Find&lt;TEntity&gt;(Expression&lt;Func&lt;TEntity, bool&gt;&gt; criteria) where TEntity : class { return GetQuery&lt;TEntity&gt;().Where(criteria); } private IUnitOfWork unitOfWork; public ObjectContext ObjectContext { get { return ContextManager.CurrentFor(); } } public IUnitOfWork UnitOfWork { get { if (unitOfWork == null) { unitOfWork = new UnitOfWork(this.ObjectContext); } return unitOfWork; } } public IQueryable&lt;TEntity&gt; GetQuery&lt;TEntity&gt;() where TEntity : class { var entityName = GetEntityName&lt;TEntity&gt;(); return ObjectContext.CreateQuery&lt;TEntity&gt;(entityName); } } </code></pre> <p>then I will redirect save changes and other committing the transaction with <code>UnitOfWork.cs</code></p> <pre><code>public class UnitOfWork:IUnitOfWork { private DbTransaction _transaction; private ObjectContext _objectContext; public UnitOfWork(ObjectContext context) { _objectContext = context; } public bool IsInTransaction { get { return _transaction != null; } } public void BeginTransaction() { BeginTransaction(IsolationLevel.ReadCommitted); } public void BeginTransaction(IsolationLevel isolationLevel) { if (_transaction != null) { throw new ApplicationException("Cannot begin a new transaction while an existing transaction is still running. " + "Please commit or rollback the existing transaction before starting a new one."); } OpenConnection(); _transaction = _objectContext.Connection.BeginTransaction(isolationLevel); } public void RollBackTransaction() { if (_transaction == null) { throw new ApplicationException("Cannot roll back a transaction while there is no transaction running."); } try { _transaction.Rollback(); } catch { throw; } finally { ReleaseCurrentTransaction(); } } public void CommitTransaction() { if (_transaction == null) { throw new ApplicationException("Cannot roll back a transaction while there is no transaction running."); } try { _objectContext.SaveChanges(); _transaction.Commit(); } catch { _transaction.Rollback(); throw; } finally { ReleaseCurrentTransaction(); } } public void SaveChanges() { if (IsInTransaction) { throw new ApplicationException("A transaction is running. Call BeginTransaction instead."); } _objectContext.SaveChanges(SaveOptions.AcceptAllChangesAfterSave); } public void SaveChanges(SaveOptions saveOptions) { if (IsInTransaction) { throw new ApplicationException("A transaction is running. Call BeginTransaction instead."); } _objectContext.SaveChanges(saveOptions); } /// &lt;summary&gt; /// Releases the current transaction /// &lt;/summary&gt; private void ReleaseCurrentTransaction() { if (_transaction != null) { _transaction.Dispose(); _transaction = null; } } private void OpenConnection() { if (_objectContext.Connection.State != ConnectionState.Open) { _objectContext.Connection.Open(); } } /// &lt;summary&gt; /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources. /// &lt;/summary&gt; public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } /// &lt;summary&gt; /// Disposes the managed and unmanaged resources. /// &lt;/summary&gt; /// &lt;param name="disposing"&gt;&lt;/param&gt; private void Dispose(bool disposing) { if (!disposing) return; if (_disposed) return; ReleaseCurrentTransaction(); _disposed = true; } private bool _disposed; } </code></pre> <p>and I am getting my context through my <code>ContextManager</code> class:</p> <pre><code>public class ContextManager { /// &lt;summary&gt; /// The default connection string name used if only one database is being communicated with. /// &lt;/summary&gt; public static readonly string DefaultConnectionStringName = "DefaultDb"; /// &lt;summary&gt; /// An application-specific implementation of IObjectContextStorage must be setup either thru /// &lt;see cref="InitStorage" /&gt; or one of the &lt;see cref="Init" /&gt; overloads. /// &lt;/summary&gt; private static IObjectContextStorage Storage { get; set; } /// &lt;summary&gt; /// Maintains a dictionary of object context builders, one per database. The key is a /// connection string name used to look up the associated database, and used to decorate respective /// repositories. If only one database is being used, this dictionary contains a single /// factory with a key of &lt;see cref="DefaultConnectionStringName" /&gt;. /// &lt;/summary&gt; // private static Dictionary&lt;string, IObjectContextBuilder&lt;ObjectContext&gt;&gt; objectContextBuilders = new Dictionary&lt;string, IObjectContextBuilder&lt;ObjectContext&gt;&gt;(); private static object _syncLock = new object(); /// &lt;summary&gt; /// Used to get the current object context session if you're communicating with a single database. /// When communicating with multiple databases, invoke &lt;see cref="CurrentFor()" /&gt; instead. /// &lt;/summary&gt; public static ObjectContext Current { get { return CurrentFor(); } } /// &lt;summary&gt; /// Used to get the current ObjectContext associated with a key; i.e., the key /// associated with an object context for a specific database. /// /// If you're only communicating with one database, you should call &lt;see cref="Current" /&gt; instead, /// although you're certainly welcome to call this if you have the key available. /// &lt;/summary&gt; public static ObjectContext CurrentFor() { ObjectContext context = null; lock (_syncLock) { if (context == null) { context =new TestDAL.DataEntities.MyTestDBEntities(); //Storage.SetObjectContextForKey(key, context); } } return context; } /// &lt;summary&gt; /// This method is used by application-specific object context storage implementations /// and unit tests. Its job is to walk thru existing cached object context(s) and Close() each one. /// &lt;/summary&gt; public static void CloseAllObjectContexts() { if (CurrentFor().Connection.State == System.Data.ConnectionState.Open) { CurrentFor().Connection.Close(); } } } </code></pre> <p>it gives me retrieval of entities, but when I want to create an entity it doesn't shows nay error nor any update in the database.</p> <p>Any clue will be helpful.</p>
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