Validation failed for one or more entities while saving changes to SQL Server Database using Entity Framework

Question

I want to save my Edit to Database and I am using Entity FrameWork Code-First in ASP NET MVC 3   C  but I am getting errors  In my Event class  I have DateTime and TimeSpan datatypes but in my database  I ve got Date and time respectively  Could this be the reason  How can I cast to the appropriate datatype in the code before saving changes to database   public class Event       public int EventId   get  set        public int CategoryId   get  set        public int PlaceId   get  set        public string Title   get  set        public decimal Price   get  set        public DateTime EventDate   get  set        public TimeSpan StartTime   get  set        public TimeSpan EndTime   get  set        public string Description   get  set        public string EventPlaceUrl   get  set        public Category Category   get  set        public Place Place   get  set        Method in the controller      Problem at storeDB SaveChanges        POST   EventManager Edit 386          HttpPost  public ActionResult Edit int id  FormCollection collection        var theEvent   storeDB Events Find id        if  TryUpdateModel theEvent                 storeDB SaveChanges            return RedirectToAction  Index              else               ViewBag Categories   storeDB Categories OrderBy g   gt  g Name  ToList            ViewBag Places   storeDB Places OrderBy a   gt  a Name  ToList            return View theEvent             with   public class EventCalendarEntities   DbContext       public DbSet lt Event gt  Events   get  set        public DbSet lt Category gt  Categories   get  set        public DbSet lt Place gt  Places   get  set         SQL Server 2008 R2 Database   T-SQL    EventDate  Datatype   date    StartTime  Datatype   time    EndTime  Datatype   time      Http Form    EventDate  Datatype   DateTime  e g  4 8 2011 12 00 00 AM   StartTime  Datatype   Timespan time not sure  e g  08 30 00   EndTime  Datatype   Timespan time not sure  e g  09 00 00     Server Error in     Application   Validation failed for one or more entities  See  EntityValidationErrors  property for more details   Description  An unhandled exception occurred during the execution of the current web request  Please review the stack trace for more information about the error and where it originated in the code    Exception Details  System Data Entity Validation DbEntityValidationException  Validation failed for one or more entities  See  EntityValidationErrors  property for more details   Source Error    Line 75              if  TryUpdateModel theEvent   Line 76                Line 77                  storeDB SaveChanges    Line 78                  return RedirectToAction  Index    Line 79                  Source File  C  sep MvcEventCalendar MvcEventCalendar Controllers EventManagerController cs       Line  77   Stack Trace     DbEntityValidationException  Validation failed for one or more entities  See  EntityValidationErrors  property for more details

User · Answer

I think adding try catch for every SaveChanges   operation is not a good practice  it s better to centralize this    Add this class to the main DbContext class    public override int SaveChanges         try               return base SaveChanges              catch  DbEntityValidationException ex                string errorMessages   string Join       ex EntityValidationErrors SelectMany x   gt  x ValidationErrors  Select x   gt  x ErrorMessage            throw new DbEntityValidationException errorMessages             This will overwrite your context s SaveChanges   method and you ll get a comma separated list containing all the entity validation errors   this also can improved  to log errors in production env  instead of just throwing an error   hope this is helpful

User · Answer

I was getting this error today and couldn t work it out for a while  but I realised it was after adding some RequireAttributes to my models and that some development seed data was not populating all of the required fields  So just a note that if you re getting this error whilst updating the database through some sort of init strategy like DropCreateDatabaseIfModelChanges then you have to make sure that your seed data fulfils and satisfies any model data validation attributes   I know this is slightly different to the problem in the question  but it s a popular question so I thought I d add a bit more to the answer for others having the same issue as myself  Hope this helps others

User · Answer

You can extract all the information from the DbEntityValidationException with the following code  you need to add the namespaces  System Data Entity Validation and System Diagnostics to your using list    catch  DbEntityValidationException dbEx        foreach  var validationErrors in dbEx EntityValidationErrors                foreach  var validationError in validationErrors ValidationErrors                        Trace TraceInformation  Property   0  Error   1                                         validationError PropertyName                                       validationError ErrorMessage

User · Answer

This implementation wrap entity exception to exception with detail text  It handles DbEntityValidationException  DbUpdateException  datetime2 range errors  MS SQL   and include key of invalid entity in message  useful when savind many entities at one SaveChanges call    First  override SaveChanges in DbContext class   public class AppDbContext   DbContext       public override int SaveChanges                 try                       return base SaveChanges                      catch  DbEntityValidationException dbEntityValidationException                        throw ExceptionHelper CreateFromEntityValidation dbEntityValidationException                     catch  DbUpdateException dbUpdateException                        throw ExceptionHelper CreateFromDbUpdateException dbUpdateException                           public override async Task lt int gt  SaveChangesAsync CancellationToken cancellationToken                try                       return await base SaveChangesAsync cancellationToken                     catch  DbEntityValidationException dbEntityValidationException                        throw ExceptionHelper CreateFromEntityValidation dbEntityValidationException                     catch  DbUpdateException dbUpdateException                        throw ExceptionHelper CreateFromDbUpdateException dbUpdateException                     ExceptionHelper class   public class ExceptionHelper       public static Exception CreateFromEntityValidation DbEntityValidationException ex                return new Exception GetDbEntityValidationMessage ex   ex              public static string GetDbEntityValidationMessage DbEntityValidationException ex                   Retrieve the error messages as a list of strings          var errorMessages   ex EntityValidationErrors              SelectMany x   gt  x ValidationErrors               Select x   gt  x ErrorMessage               Join the list to a single string          var fullErrorMessage   string Join       errorMessages               Combine the original exception message with the new one          var exceptionMessage   string Concat ex Message    The validation errors are     fullErrorMessage           return exceptionMessage             public static IEnumerable lt Exception gt  GetInners Exception ex                for  Exception e   ex  e    null  e   e InnerException              yield return e             public static Exception CreateFromDbUpdateException DbUpdateException dbUpdateException                var inner   GetInners dbUpdateException  Last            string message               int i   1          foreach  var entry in dbUpdateException Entries                        var entry1   entry              var obj   entry1 CurrentValues ToObject                var type   obj GetType                var propertyNames   entry1 CurrentValues PropertyNames Where x   gt  inner Message Contains x   ToList                   check MS SQL datetime2 error             if  inner Message Contains  datetime2                                  var propertyNames2   from x in type GetProperties                                           where x PropertyType    typeof DateTime                                                 x PropertyType    typeof DateTime                                           select x Name                  propertyNames AddRange propertyNames2                              message     Entry     i           type Name          string Join       propertyNames Select x   gt                  string Format    0       1     x  entry1 CurrentValues x                        return new Exception message  dbUpdateException

User · Answer

Make sure that if you have nvarchar 50 in DB row you don t trying to insert more than 50characters in it  Stupid mistake but took me 3 hours to figure it out

User · Answer

This might be due to the maximum number of characters allowed for a specific column  like in sql one field might have following Data Type nvarchar 5  but the number of characters entered from the user is more than the specified  hence the error arises

User · Answer

it may caused by Property which is not populated by model   instead it is populated by Controller   which may cause this error   solution to this is assign the property before applying ModelState validation   and this second Assumption is   you may have already have Data in your Database    and trying to update it it but now fetching it

User · Answer

Thnaks for your answers  it help me alot  as i code in Vb Net  this Bolt code for Vb Net  Try    Return MyBase SaveChanges   Catch dbEx As Validation DbEntityValidationException    For Each  error  In From validationErrors In dbEx EntityValidationErrors                        From validationError In validationErrors ValidationErrors                        Select New With    PropertyName   validationError PropertyName                                            ErrorMessage   validationError ErrorMessage                                            ClassFullName   validationErrors Entry Entity                                                                      GetType   FullName           Diagnostics Trace TraceInformation  Class   0   Property   1   Error   2                                                error  ClassFullName                                              error  PropertyName                                              error  ErrorMessage     Next    Throw End Try

User · Answer

I dont like exceptions I registered the OnSaveChanges and have this  var validationErrors   model GetValidationErrors     var h   validationErrors SelectMany x   gt  x ValidationErrors                                            Select f   gt   Entity                                                             x Entry Entity                                                                   f PropertyName                                                           - gt     f ErrorMessage

User · Answer

I have faced same issue a couple of days ago while updating the database  In my case  there was few new non nullable columns added for maintenance which was not supplied in the code which is causing the exception  I figure out those fields and supplied values for them and its resolved

User · Answer

No code change required   While you are in debug mode within the catch       block open up the  QuickWatch  window  Ctrl Alt Q  and paste in there       System Data Entity Validation DbEntityValidationException ex  EntityValidationErrors   or     System Data Entity Validation DbEntityValidationException  exception  EntityValidationErrors   If you are not in a try catch or don t have access to the exception object   This will allow you to drill down into the ValidationErrors tree  It s the easiest way I ve found to get instant insight into these errors

User · Answer

This code helped find my problem when I had issue with my Entity VAlidation Erros  It told me the exact problem with my Entity Definition  Try following code where you need to cover storeDB SaveChanges    in following try catch block      try            if  TryUpdateModel theEvent                           storeDB SaveChanges                 return RedirectToAction  Index                 catch  System Data Entity Validation DbEntityValidationException dbEx        Exception raise   dbEx      foreach  var validationErrors in dbEx EntityValidationErrors                foreach  var validationError in validationErrors ValidationErrors                        string message   string Format   0   1                     validationErrors Entry Entity ToString                    validationError ErrorMessage                  raise a new exception nesting                the current instance as InnerException             raise   new InvalidOperationException message  raise                       throw raise

User · Answer

As an improvement to both Praveen and Tony  I use an override   public partial class MyDatabaseEntities   DbContext       public override int SaveChanges                 try                       return base SaveChanges                      catch  DbEntityValidationException dbEx                        foreach  var validationErrors in dbEx EntityValidationErrors                                foreach  var validationError in validationErrors ValidationErrors                                        Trace TraceInformation  Class   0   Property   1   Error   2                            validationErrors Entry Entity GetType   FullName                          validationError PropertyName                          validationError ErrorMessage                                                throw      You can also choose to handle the exception here

User · Answer

Here s an extension to Tony s extension     -   For Entity Framework 4 x  if you want to get the name and value of the key field so that you know which entity instance  DB record  has the problem  you can add the following   This provides access to the more powerful ObjectContext class members from your DbContext object      Get the key field name  amp  value     This assumes your DbContext object is   context   and that it is a single part key  var e     IObjectContextAdapter  context  ObjectContext ObjectStateManager GetObjectStateEntry validationErrors Entry Entity   string key   e EntityKey EntityKeyValues 0  Key  string val   e EntityKey EntityKeyValues 0  Value

User · Answer

This error also happens when you try to save an entity that has validation errors  A good way to cause this is to forget to check ModelState IsValid before saving to your DB

User · Answer

In the case you have classes with same property names  here is a small extension to Praveen s answer    catch  DbEntityValidationException dbEx         foreach  var validationErrors in dbEx EntityValidationErrors               foreach  var validationError in validationErrors ValidationErrors                     Trace TraceInformation                   Class   0   Property   1   Error   2                    validationErrors Entry Entity GetType   FullName                  validationError PropertyName                  validationError ErrorMessage

User · Answer

In my case I have a Table Column name Path which datatype i set was varchar 200  After updating it to nvarchar max   I have deleted the table from edmx and then again added the table and it wokred properly for me

[c#] Validation failed for one or more entities while saving changes to SQL Server Database using Entity Framework

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