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another array problem

Discussion in 'C' started by meyup, May 29, 2010.

  1. meyup

    meyup New Member

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    I create with:
    Code:
    CArray <Suchparameter*, Suchparameter*> SPA;
    CArray as a member variable, which is creating problems from without.
    But when I later pointed so

    Code:
    SPA [1] -> getUrl (1);
    want accessed, the program crashes with exception of the untreated ab.Wenn search parameters I do not grab the array operates in the function.
     
  2. pankaj.sea

    pankaj.sea New Member

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    Hi,

    Try going in with the debugger and see exactly where he abschmiert. I suspect that you have not used one occupied index or no useful pointers have registered.
     
  3. meyup

    meyup New Member

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    He smears from when a member variable of the query parameters to access will.Ich habs also in creating the classes because debuged, is easily resorted to it.
    So I fill the array:
    Code:
    SPA.Add ( new search parameters (val.intVal));
     
  4. pankaj.sea

    pankaj.sea New Member

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    Another approach to error Search:

    Substitute times
    Code:
    SPA [1] -> getUrl (1);
    by
    Code:
    * = Search parameters pSuchTemp SPA [1]; 
    pSuchTemp-> getUrl (1);
    and look in the debugger's address pSuchTemp and content more closely. If you something strange happens, then you have at least one track.
    Otherwise, I would need a little more code (but can not tell you how I look at what an accidental).
     
  5. meyup

    meyup New Member

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    The program is supposed to, from a database into the array shoveling data, but for some reason is SPA [0] correctly filled not have the program so it changed the array until an item goes through this, I would now runs es.Trotzdem like to know why the program macht.Hier the array is the entire code of the fills.

    Code:
    CDaoData base archive; 
    COleVariant val; 
    archiv.Open (" c: \ \ my documents \ \ db3.mdb "); 
    CDaoRecordset r (& archive); 
    r.Open dbOpenDynaset (, " Select ID from query parameters , "dbReadOnly), 
      if ( ! r.IsEOF ()) 
    ( 
    SPA.SetSize (r.GetRecordCount ()); 
    r.MoveFirst (); 
       while (! r.IsEOF ()) 
    ( 
    r.GetFieldValue (" ID ", val); 
    SPA.Add ( new search parameters (val.intVal)); 
    r.MoveNext (); 
    ) 
    ) 
    r.Close (); 
    archiv.Close ();
    
     
  6. pankaj.sea

    pankaj.sea New Member

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    I can not guarantee that my explanation is correct, but for me there is the as follows:
    Code:
    SPA.SetSize (r.GetRecordCount ());
    Since you r still no MoveLast () or similar to you, you will not show the real number of lines, special ia a first The lay so an array of size 1 to (your element 0, then that does not work).
    Below you will:
    Code:
    SPA.Add ( new search parameters (val.intVal));
    This statement you Haeger exsitierende to the array to a new entry and fill it with "new search parameters ..." .
    In sum, explains the behavior of your program.

    Remedy:
    Either:
    Make the SetSize r.MoveLast before () and replace this
    Code:
    SPA.Add ( new search parameters (val.intVal))
    by
    Code:
    SPA [iIndex] = new Parameters (val.intVal)
    ,
    your being you have to make up from 0 duchlaufen loop in iIndex.
    Or
    you your savings SetSize (). Then your first causes "Add" the produce of the 0-th element, etc.
     
  7. meyup

    meyup New Member

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    Thanks now running.
    :D :) :D
     

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