Solved

COM Array (CComSafeArray::MultiDimGetAt)

Posted on 2006-06-29
7
709 Views
Last Modified: 2008-01-09
I have a COM array of doubles of type CComSafeArray, say with 10 rows and 30 columns. I simply need to retrieve its elements one by one and print them out on the screen. How do I do this with MultiDimGetAt? I have read the Microsoft documentation available on the MSDN website but it's not very clear to me, and I don't know much about COM.
Thanks.
0
Comment
Question by:Rothbard
  • 5
  • 2
7 Comments
 
LVL 11

Expert Comment

by:Jase-Coder
ID: 17008437

for(int i=0; i < 10; i++)
{
    Array->GetAt(i, &Data);
    cout << Data;
}
0
 

Author Comment

by:Rothbard
ID: 17008472
What is Data in your code? Also, since our Array has two dimensions wouldn't you need MultiDimGetAt rather than GetAt?
0
 
LVL 11

Accepted Solution

by:
Jase-Coder earned 500 total points
ID: 17008479
sorry ignore the above: do

LONG Index[2];

for(int i=0; i< 10; i++)
   for(int j=0; j < 3; j++)
{
      Index[0] = i;
      Index[1] = j;
     
      Array->MultiDimGetAt(Index, Data);
      cout << Data << endl;
}
     

0
Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 
LVL 11

Expert Comment

by:Jase-Coder
ID: 17008485
Data is declared the same as the elements in your array.
0
 
LVL 11

Expert Comment

by:Jase-Coder
ID: 17008489
In your case declare Data as double
0
 
LVL 11

Expert Comment

by:Jase-Coder
ID: 17008495
change for(int j=0; j < 3; j++) to for(int j=0; j < 30; j++)
0
 

Author Comment

by:Rothbard
ID: 17008514
Thanks!
0

Featured Post

ScreenConnect 6.0 Free Trial

Explore all the enhancements in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI, app configurations and chat acknowledgement to improve customer engagement!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In days of old, returning something by value from a function in C++ was necessarily avoided because it would, invariably, involve one or even two copies of the object being created and potentially costly calls to a copy-constructor and destructor. A…
Often, when implementing a feature, you won't know how certain events should be handled at the point where they occur and you'd rather defer to the user of your function or class. For example, a XML parser will extract a tag from the source code, wh…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question