C Foreach statement does not contain public definition for GetEnumerator

Question

I m having a problem with a Windows Form application I m building in C   The error is stating  foreach statement cannot operate on variables of type  CarBootSale CarBootSaleList  because  CarBootSale CarBootSaleList  does not contain a public definition for  GetEnumerator     I can t seem to understand what is causing this   This is the code that is throwing up the error           List lt CarBootSaleList gt  Sortcarboot   new List lt CarBootSaleList gt              foreach  CarBootSale c in carBootSaleList                        if  c Charity     N A                                 Sortcarboot Add carBootSaleList                   textReportGenerator GenerateAllReport Sortcarboot  AppData CHARITY                             and this is the CarBootSaleList class where it s saying there isn t a GetEnumerator definition   public class CarBootSaleList        private List lt CarBootSale gt  carbootsales       public CarBootSaleList                 carbootsales   new List lt CarBootSale gt                public bool AddCarBootSale CarBootSale carbootsale                bool success   true          foreach  CarBootSale cbs in carbootsales                        if  cbs ID    carbootsale ID                                success   false                                  if  success                        carbootsales Add carbootsale                     return success             public void DeleteCarBootSale CarBootSale carbootsale                carbootsales Remove carbootsale              public int GetListSize                 return carbootsales Count               public List lt CarBootSale gt  ReturnList                 return carbootsales             public string Display                 string msg                foreach  CarBootSale cbs in carbootsales                        msg    String Format   0    1    cbs ID  cbs Location  cbs Date               msg    Environment NewLine                    return msg

User · Answer

You should implement the IEnumerable interface (CarBootSaleList should impl it in your case).

http://msdn.microsoft.com/en-us/library/system.collections.ienumerable.getenumerator.aspx

But it is usually easier to subclass System.Collections.ObjectModel.Collection and friends

http://msdn.microsoft.com/en-us/library/system.collections.objectmodel.aspx

Your code also seems a bit strange, like you are nesting lists?

User · Answer

Your CarBootSaleList class is not a list   It is a class that contain a list   You have three options   Make your CarBootSaleList object implement IEnumerable   or  make your CarBootSaleList  inherit from List lt CarBootSale gt   or   if you are lazy this could almost do the same thing without extra coding  List lt List lt CarBootSale gt  gt

User · Answer

You don t show us the declaration of carBootSaleList  However from the exception message I can see that it is of type CarBootSaleList  This type doesn t implement the IEnumerable interface and therefore cannot be used in a foreach   Your CarBootSaleList class should implement IEnumerable lt CarBootSale gt    public class CarBootSaleList   IEnumerable lt CarBootSale gt        private List lt CarBootSale gt  carbootsales                public IEnumerator lt CarBootSale gt  GetEnumerator                 return carbootsales GetEnumerator               IEnumerator IEnumerable GetEnumerator                 return carbootsales GetEnumerator

User · Answer

In foreach loop instead of carBootSaleList use carBootSaleList data  You probably do not need answer anymore  but it could help someone

[c#] C# Foreach statement does not contain public definition for GetEnumerator

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