entity-framework-4.1 - Elmah 和 DbEntityValidationException

Question

我已经使用 Elmah 和 EF4.1 Code First 设置了一个项目。

项目抛出System.Data.Entity.Validation.DbEntityValidationException ，但 Elmah 没有提供足够的细节来确定哪些验证失败。所有记录的是:

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

有没有办法让 Elmah 扩展并记录 EntityValidationErrors属性(property)？

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;