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Can I jump to prior position on a CList ?

Posted on 2011-03-06
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Last Modified: 2012-05-11
Greetings,
I have a scenario where I have an outer look , where I iterate through information a result set of A CRecordset open operation and an inner loop, called multiple times per iteration of the outer loop, that also uses a sub-set of this information. In the current implementation I had a different CRecorset object in the function within the inner loop, performing database request for the sub-set of results it required.
 For a smart approach I want to perform only the outer query, stuff all the results in an object I can iterate on, and within the loop iterate through the same data set.
 However my worry is that after leaving the inner loop I want to have the iterator at the same position as when I entered it. Any suggestions? E.g. saving the POSITION object, returned in the GetNextPos and use the setAt funtion to put the iterator back into it's hold position?

Cheers,
r
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Question by:rjorge
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jkr earned 2000 total points
ID: 35046927
A POSITION is basically a 'CNode' with that being a
struct CNode
	{
		CNode* pNext;
		CNode* pPrev;
		TYPE data;
	};

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So, if you store the POSITION you want to use further at a scope where is remains valid (i.e. outside both loop's bodies) you should be able to use it with 'CList::GetPrev()' to move to a prior position. That of course assumes the CList object is not altered during that process.
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Author Closing Comment

by:rjorge
ID: 35047112
Quick and correct. Great info.
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