Elmah和DbEntityValidationException

Question

我已經用Elmah和EF4.1 Code First設置了一個項目。

該項目投擲System.Data.Entity.Validation.DbEntityValidationException，但Elmah沒有提供足夠的細節來確定哪些驗證失敗。所有這一切都記錄是：

System.Data.Entity.Validation.DbEntityValidationException: Validation failed for one or more entities. See 'EntityValidationErrors' property for more details. 

有沒有一種方法，使ELMAH擴大並記錄EntityValidationErrors財產？

Answer 1

List<IUserFeedback> errors = new List<IUserFeedback>(); 

try 
{ 
    _dbContext.SaveChanges(); 
    Updated(this, HasUnsavedChanges); 
} 
catch (DbEntityValidationException ex) 
{ 
    foreach (var x in ex.EntityValidationErrors) 
    { 
     foreach (var y in x.ValidationErrors) 
     { 
      if (!String.IsNullOrWhiteSpace(y.PropertyName)) 
       errors.Add(new UserFeedback() { 
        FeedbackFlags = TypeOfUserFeedbackFlags.Error, 
        Message = String.Format("Unable to save {0} due to an issue with its \"{1}\" value. The error returned was \"{2}\"",x.Entry.Entity, y.PropertyName, y.ErrorMessage) 
       }); 
      else 
       errors.Add(new UserFeedback() { 
        FeedbackFlags = TypeOfUserFeedbackFlags.Error, 
        Message = String.Format("Unable to save {0} due to the error \"{1}\"", x.Entry, y.ErrorMessage) 
       }); 
     } 
    } 
} 

return errors;