objectstatemanager

Object with same key already exists in objectstatemanager

由 混江龙づ霸主 提交于 2019-12-25 18:15:18
问题 Lots of questions about this error, and yet I cant figure out my problem (maybe i need some more of the theory around this). I'm gettin the "Object with same key already exists in objectstatemanager" error and what im trying to do is so simple, I just have a Edit View for client, which has a list of Phones. As sson as the user hits the Save button, I just wrap everything with Json and send it to the controller with Ajax. On the Controller, im supposed to check which phones on the list sent i

Unable to attach a detached entity: “An object with the same key already exists in the ObjectStateManager”

由 心已入冬 提交于 2019-12-23 06:48:36
问题 I am trying to attach an entity to the ObjectContext. When I do so, the following InvalidOperationException is thrown: An object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key. I checked in the object state manager and the item does not exist: //Data context is actually the object context. ObjectStateEntry contact; while ( //Should only work once since it should be true if the item was attached !DataContext

How to find out which entity is inside the ObjectStateManager more then once

由 五迷三道 提交于 2019-12-11 10:37:34
问题 Hi i get the following error: AcceptChanges cannot continue because the object's key values conflict with another object in the ObjectStateManager. Make sure that the key values are unique before calling AcceptChanges. Now i'm trying to fix it but i need to pinpoint what entity is giving me trouble so i know where to look. i know what the error is and i know how to solve it, but i don't know how to find out which entity is double. 回答1: You can check the ObjectStateManager to get all the

unexpected GetType() result for entity entry

由 …衆ロ難τιáo~ 提交于 2019-11-27 19:40:13
While I iterating through ObjectStateEntries I expected [t] variable name will be MY_ENTITY foreach (ObjectStateEntry entry in context.ObjectStateManager.GetObjectStateEntries(EntityState.Deleted)) { Type t = entry.Entity.GetType(); ... } but real I have System.Data.Entity.DynamicProxies.MY_ENTITY_vgfg7s7wyd7c7vgvgv..... How can I determine can I cast current entry to MY_ENTITY type? You can get the original entity type of a proxy type by ObjectContext.GetObjectType(entity.GetType()) This is a static method of ObjectContext , so you can readily use in in a DbContext environment. If for some

ObjectContext.Refresh()?

由 ぐ巨炮叔叔 提交于 2019-11-27 04:16:23
How to update ALL the dirty entities from the data store, and reset their changed values to the original store value? The method ObjectContext.Refresh requires as a parameter the entities to be refreshed. The following usually works: Context.Refresh(RefreshMode.StoreWins, _ Context.ObjectStateManager.GetObjectStateEntries()) It sometimes causes problems with EntityRelations. look at my comment for further details. You can use this code: public void RefreshAll() { // Get all objects in statemanager with entityKey // (context.Refresh will throw an exception otherwise) var refreshableObjects =

ObjectContext.Refresh()?

由 人走茶凉 提交于 2019-11-26 11:07:29
问题 How to update ALL the dirty entities from the data store, and reset their changed values to the original store value? The method ObjectContext.Refresh requires as a parameter the entities to be refreshed. 回答1: The following usually works: Context.Refresh(RefreshMode.StoreWins, _ Context.ObjectStateManager.GetObjectStateEntries()) It sometimes causes problems with EntityRelations. look at my comment for further details. 回答2: You can use this code: public void RefreshAll() { // Get all objects
订阅 objectstatemanager