检查是否有待保存的待更改 [英] Check if there are any pending changes to be saved

问题描述

200 200 200 200 200 200 CE X- 2004545 X- 2004545 X- 20045 X- 20045 X- 20045 X- 20045 X- 20045 X- 20045 X- 20045 200 X- X-4545454545 X- 20045 X-4545 X- 20045 X- 20045 X- 20045 X- 20045 X- 20045 X- 20045 CEEC X- 200 200 200 200 200 200 200 -40 200 200 -40 -40 200 200 -40 200 200 200 200 -40 200 200 200 200 200：20045 200 200 200： b）> 0;

编辑：

改进的代码：

  bool changesMade = context。 
 ObjectStateManager。新新新新旗新新新新旗新新旗新新旗新新旗旗新1992新新旗新新旗旗新1992新新新新旗新新旗200新新新新旗新新名： 
  

Is there a way to find out whether there are unsaved changes in my entity context, in the Entity Framework?

解决方案

This might work (if by changes you mean added, removed and modified entities):

bool changesMade = (context.ObjectStateManager.GetObjectStateEntries(EntityState.Added).Count() +
                    context.ObjectStateManager.GetObjectStateEntries(EntityState.Deleted).Count() +
                    context.ObjectStateManager.GetObjectStateEntries(EntityState.Modified).Count()
                    ) > 0;

Edit:

Improved code:

bool changesMade = context.
                   ObjectStateManager.
                   GetObjectStateEntries(EntityState.Added | 
                                         EntityState.Deleted | 
                                         EntityState.Modified
                                        ).Any();

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