Why doesn't the following code work?
I get an error at the following line...
CardGroup[0].PropertyCardTy pe = (CardType)0;
The error is "Object reference not set to an instance of an object.", which
means the object in question have not been initiated.
But I have init the object above n this line...
public Card [] CardGroup = new Card[53];
Anybody knows how to resolve this??
Thanks :-)
namespace CardLibrary
{
public class CardFactory
{
//Create and init CardGroup
public Card [] CardGroup = new Card[53];
//Construktor
public CardFactory()
{
CardGroup[0].PropertyCardTy pe = (CardType)0;
Console.WriteLi ne("Konstruktor : public CardFactory()") ;
}
} //Slut public class CardFactory
} //Slut namespace CardLibrary 5 6824
You're trying to convert an integer to a CardType object, I would have thought it would give some sort of type mismatch error. Maybe
CardGroup[0] is null.
--
Michael Culley
"Tommy Lang" <mu*****@yahoo. se> wrote in message news:78******** *************** **@posting.goog le.com... Why doesn't the following code work? I get an error at the following line... CardGroup[0].PropertyCardTy pe = (CardType)0; The error is "Object reference not set to an instance of an object.", which means the object in question have not been initiated. But I have init the object above n this line... public Card [] CardGroup = new Card[53];
Anybody knows how to resolve this??
Thanks :-)
namespace CardLibrary { public class CardFactory { //Create and init CardGroup public Card [] CardGroup = new Card[53];
//Construktor public CardFactory() { CardGroup[0].PropertyCardTy pe = (CardType)0;
Console.WriteLi ne("Konstruktor : public CardFactory()") ; } } //Slut public class CardFactory } //Slut namespace CardLibrary
I'm inferring this but it looks like Card is a reference type i.e. a class
So public Card [] CardGroup = new Card[53];
will create an array that holds Card instances, but not create those
instances.
You have to loop through that array and create them:
for(int c=0;c<CardGroup .Length;c++)
CardGroup[c]=new Card();
Then CardGroup[0].PropertyCardTy pe = (CardType)0; should work.
Richard
--
C#, .NET and Complex Adaptive Systems: http://blogs.geekdojo.net/Richard
"Tommy Lang" <mu*****@yahoo. se> wrote in message
news:78******** *************** **@posting.goog le.com... Why doesn't the following code work? I get an error at the following line... CardGroup[0].PropertyCardTy pe = (CardType)0; The error is "Object reference not set to an instance of an object.",
which means the object in question have not been initiated. But I have init the object above n this line... public Card [] CardGroup = new Card[53];
Anybody knows how to resolve this??
Thanks :-)
namespace CardLibrary { public class CardFactory { //Create and init CardGroup public Card [] CardGroup = new Card[53];
//Construktor public CardFactory() { CardGroup[0].PropertyCardTy pe = (CardType)0;
Console.WriteLi ne("Konstruktor : public CardFactory()") ; } } //Slut public class CardFactory } //Slut namespace CardLibrary
> You're trying to convert an integer to a CardType object, I would have thought it would give some sort of type mismatch error.
My mistake, I presume CardType is an enum.
--
Michael Culley
"Michael Culley" <mc*****@NOSPAM optushome.com.a u> wrote in message news:Ot******** ******@tk2msftn gp13.phx.gbl... You're trying to convert an integer to a CardType object, I would have thought it would give some sort of type mismatch error.
Maybe CardGroup[0] is null.
-- Michael Culley
"Tommy Lang" <mu*****@yahoo. se> wrote in message news:78******** *************** **@posting.goog le.com... Why doesn't the following code work? I get an error at the following line... CardGroup[0].PropertyCardTy pe = (CardType)0; The error is "Object reference not set to an instance of an object.", which means the object in question have not been initiated. But I have init the object above n this line... public Card [] CardGroup = new Card[53];
Anybody knows how to resolve this??
Thanks :-)
namespace CardLibrary { public class CardFactory { //Create and init CardGroup public Card [] CardGroup = new Card[53];
//Construktor public CardFactory() { CardGroup[0].PropertyCardTy pe = (CardType)0;
Console.WriteLi ne("Konstruktor : public CardFactory()") ; } } //Slut public class CardFactory } //Slut namespace CardLibrary
This solved my problem. I had created an array that holds Card
instances, but not created the instances themself. Card is a class and
CardType is an Enum.
Thanks,
Tommy
"Richard A. Lowe" <ch*****@yumspa myumYahoo.com> wrote in message news:<eK******* *******@TK2MSFT NGP09.phx.gbl>. .. I'm inferring this but it looks like Card is a reference type i.e. a class
So public Card [] CardGroup = new Card[53]; will create an array that holds Card instances, but not create those instances.
You have to loop through that array and create them: for(int c=0;c<CardGroup .Length;c++) CardGroup[c]=new Card();
Then CardGroup[0].PropertyCardTy pe = (CardType)0; should work.
Richard
-- C#, .NET and Complex Adaptive Systems: http://blogs.geekdojo.net/Richard "Tommy Lang" <mu*****@yahoo. se> wrote in message news:78******** *************** **@posting.goog le.com... Why doesn't the following code work? I get an error at the following line... CardGroup[0].PropertyCardTy pe = (CardType)0; The error is "Object reference not set to an instance of an object.", which means the object in question have not been initiated. But I have init the object above n this line... public Card [] CardGroup = new Card[53];
Anybody knows how to resolve this??
Thanks :-)
namespace CardLibrary { public class CardFactory { //Create and init CardGroup public Card [] CardGroup = new Card[53];
//Construktor public CardFactory() { CardGroup[0].PropertyCardTy pe = (CardType)0;
Console.WriteLi ne("Konstruktor : public CardFactory()") ; } } //Slut public class CardFactory } //Slut namespace CardLibrary
You, sir, are a gentleman! Always a pleasure to help.
Richard
--
C#, .NET and Complex Adaptive Systems: http://blogs.geekdojo.net/Richard
"Tommy Lang" <mu*****@yahoo. se> wrote in message
news:78******** *************** ***@posting.goo gle.com... This solved my problem. I had created an array that holds Card instances, but not created the instances themself. Card is a class and CardType is an Enum.
Thanks, Tommy
"Richard A. Lowe" <ch*****@yumspa myumYahoo.com> wrote in message
news:<eK******* *******@TK2MSFT NGP09.phx.gbl>. .. I'm inferring this but it looks like Card is a reference type i.e. a
class So public Card [] CardGroup = new Card[53]; will create an array that holds Card instances, but not create those instances.
You have to loop through that array and create them: for(int c=0;c<CardGroup .Length;c++) CardGroup[c]=new Card();
Then CardGroup[0].PropertyCardTy pe = (CardType)0; should work.
Richard
-- C#, .NET and Complex Adaptive Systems: http://blogs.geekdojo.net/Richard "Tommy Lang" <mu*****@yahoo. se> wrote in message news:78******** *************** **@posting.goog le.com... Why doesn't the following code work? I get an error at the following line... CardGroup[0].PropertyCardTy pe = (CardType)0; The error is "Object reference not set to an instance of an object.", which means the object in question have not been initiated. But I have init the object above n this line... public Card [] CardGroup = new Card[53];
Anybody knows how to resolve this??
Thanks :-)
namespace CardLibrary { public class CardFactory { //Create and init CardGroup public Card [] CardGroup = new Card[53];
//Construktor public CardFactory() { CardGroup[0].PropertyCardTy pe = (CardType)0;
Console.WriteLi ne("Konstruktor : public CardFactory()") ; } } //Slut public class CardFactory } //Slut namespace CardLibrary This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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