asp.net mvc equivalent of rails callback before_save

Hi i'm looking for a asp.net mvc开发者_如何学C callback for elaborate data before save a model.

In rails there is before_save.

Thanks

If you are using Entity Framework (which your tag indicates), then this StackOverflow post should be able to help you out. Basically you can intercept the SavingChanges event, and do whatever you want. Put this in a partial class that adds the following methods to your object context:

partial void OnContextCreated()
{
    SavingChanges += DoWhatYouMust;
}

private void DoWhatYouMust(object sender, System.EventArgs e)
{
}