In Entity framework, how to call a method on Entity before saving?

I have an almost identical situation and I manage it by handling the SavingChanges event on the context First I create an interface that defines the timestamping operations: public interface IHasTimeStamp { void DoTimeStamp(); } Then I implement this interface in my entities: Public class User : IHasTimeStamp ( public void DoTimeStamp() { if(dataContext. Entry(this). State == System.Data.EntityState.

Added) { //add creation date_time this. CreationDate=DateTime. Now; } if(dataContext.

Entry(this). State == System.Data.EntityState. Modified) { //update Updation time this.

UpdatedOnDate=DateTime. Now; } } } The final step is to register the SavingChanges handler and implement it public partial class MyEntities { partial void OnContextCreated() { // Register the handler for the SavingChanges event. This.

SavingChanges += new EventHandler(context_SavingChanges); } // SavingChanges event handler. Private static void context_SavingChanges(object sender, EventArgs e) { // Validate the state of each entity in the context // before SaveChanges can succeed. Foreach (ObjectStateEntry entry in ((ObjectContext)sender).

ObjectStateManager. GetObjectStateEntries(EntityState. Added | EntityState.

Modified)) { if (!entry. IsRelationship && (entry. Entity is IHasTimeStamp)) { (entry.

Entity as IHasTimeStamp).DoTimeStamp(); } } } }.

I have an almost identical situation and I manage it by handling the SavingChanges event on the context. First I create an interface that defines the timestamping operations: public interface IHasTimeStamp { void DoTimeStamp(); } Then I implement this interface in my entities: Public class User : IHasTimeStamp ( public void DoTimeStamp() { if(dataContext. Entry(this).

State == System.Data.EntityState. Added) { //add creation date_time this. CreationDate=DateTime.

Now; } if(dataContext. Entry(this). State == System.Data.EntityState.

Modified) { //update Updation time this. UpdatedOnDate=DateTime. Now; } } } The final step is to register the SavingChanges handler and implement it.

Public partial class MyEntities { partial void OnContextCreated() { // Register the handler for the SavingChanges event. This. SavingChanges += new EventHandler(context_SavingChanges); } // SavingChanges event handler.

Private static void context_SavingChanges(object sender, EventArgs e) { // Validate the state of each entity in the context // before SaveChanges can succeed. Foreach (ObjectStateEntry entry in ((ObjectContext)sender). ObjectStateManager.

GetObjectStateEntries(EntityState. Added | EntityState. Modified)) { if (!entry.

IsRelationship && (entry. Entity is IHasTimeStamp)) { (entry. Entity as IHasTimeStamp).DoTimeStamp(); } } } }.

Good job! Upvote. Could have been my answer and the way to go.

– Joep Greuter Jul 13 at 19:48.

I have an almost identical situation and I manage it by handling the SavingChanges event on the context.

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