Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

最新推荐文章于 2021-11-01 11:12:05 发布

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本文介绍如何在使用Entity Framework Core时捕获并处理DbEntityValidationException异常。通过详细示例展示了如何在不同环境下（如控制台应用和Web应用）进行有效的错误信息收集与展示。

            try
            {
                // Your code...
                // Could also be before try if you know the exception occurs in SaveChanges

                context.SaveChanges();

            }
            //在应用程序中，用下面的版本，调试，查看errMsg
            catch (DbEntityValidationException e)
            {
                string errMsg = string.Empty;

                foreach (var eve in e.EntityValidationErrors)
                {
                    errMsg += string.Format("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
                        eve.Entry.Entity.GetType().Name, eve.Entry.State);
                    foreach (var ve in eve.ValidationErrors)
                    {
                        errMsg += string.Format("- Property: \"{0}\", Error: \"{1}\"",
                            ve.PropertyName, ve.ErrorMessage);
                    }
                }

                throw;
            }
            //在控制台，则直接输出
            catch (DbEntityValidationException e)
            {
                foreach (var eve in e.EntityValidationErrors)
                {
                    Console.WriteLine("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
                        eve.Entry.Entity.GetType().Name, eve.Entry.State);
                    foreach (var ve in eve.ValidationErrors)
                    {
                        Console.WriteLine("- Property: \"{0}\", Error: \"{1}\"",
                            ve.PropertyName, ve.ErrorMessage);
                    }
                }
                throw;
            }