Re: Loose Connection

Hi

Thanks for your help

I declared in the header file

Connection con , has a private variable, and in the constructor just done 
con.real_connect (....)

And it worked fine.

Próspero

At 07:56 19-09-2002 +0200, Franz Alt wrote:
> [...]
> >..., but the problem is that my connection
> >only persists within the constructor of this class. After that it just
> >doesn't exists.
> [...]
> >I send complete code, because i'm a newbie in c++ and i don't know if
> >i've any mistake in that...
>
> I'm also quite starting in C++ und mysql, but I think you're right. Your
> error is, that you only create a temporary object in your constructor.
>
> You may either try to declare a member variable like
>
>   Connection con;   // automatically creates object in "stack"-memory
> ~>calls its constructor
> in your class-header
> use it like befor by .operator , just let out the line
> Connection con (use exceptions);
>
> ( I'm not quit shure about th "use exceptions" ... )
>
> or maybe better, but a little more tricky use a pointer. ok, i'm quite a
> newbe, but some "hacker's" may correct my code:
>
> // in header of the class:
> class xy
> {
>      Connection* con;  // say: there is a Variable reserved to save Pointer
> to a connection, nothing more!
> }
> // let's say in "cpp-file"
> // - Konstruktor
> xy::xy()
> {
>     ...
>     this->con = new Connection;   // this creates the object in
> "heap"-memory ~> NOW calls its constructor
>     con->connect( ......... );            // -> instead of .
> }
> // ~ destuctor
> ~xy::xy()
> {
>       delete con; // destoys Object in "heap" memory
> }
>
> I hope, these are some usefull hints for you!
>
> (Sorry about the quoting and thread, i answered from the mailing-list-archiv
> http://lists.mysql.com/ )
>
> --
> Franz Alt,
>
> programmer and webmaster
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