为什么我对TreeNode的操作会导致内存错误？

darkfreedom 2008-08-07 09:19:02





void Updatefriend() //change

{

    MainForm->isupdatefriend = true;

    multimap<AnsiString,USER>::iterator iter;   //指向Friendset

    USER *pTemp = NULL;

    TTreeNode *node,*pnode,*nextnode;

    for(pnode = MainForm->PNode->getFirstChild();pnode!=NULL;pnode=nextnode)

    {

        nextnode = MainForm->PNode->GetNextChild(pnode);

        iter = MainForm->onlineuserset.find(((PUSER)(pnode->Data))->strLockid);

        if(iter==MainForm->onlineuserset.end())

        {

            pTemp = new USER;

            memcpy(pTemp,pnode->Data,sizeof(USER));

            //ShowMessage("上线"+pTemp->strName);

            node = MainForm->TvFriend->Items->AddChildObject(MainForm->LNode,pTemp->strName,pTemp);

            node->ImageIndex = pnode->ImageIndex;

            MainForm->TvFriend->Items->Delete(pnode);

            pTemp = NULL;

        }

        else

        {

            pnode->Text =iter->second.strName;

            pnode->ImageIndex = iter->second.iIndexofi;

            memcpy(pnode->Data,&(iter->second),sizeof(USER));

        }

    }

    for(pnode = MainForm->LNode->getFirstChild();pnode!=NULL;pnode=nextnode)

    {

        nextnode = MainForm->LNode->GetNextChild(pnode);

        iter = MainForm->onlineuserset.find(((PUSER)(pnode->Data))->strLockid);

        if(iter!=MainForm->onlineuserset.end())

        {

            pTemp = new USER;

            memcpy(pTemp,pnode->Data,sizeof(USER));

            //ShowMessage("下线"+pTemp->strName);

            node = MainForm->TvFriend->Items->AddChildObject(MainForm->PNode,pTemp->strName,pTemp);

            node->ImageIndex=iter->second.iIndexofi;

            MainForm->TvFriend->Items->Delete(pnode);

            pTemp = NULL;

        }

    }

    MainForm->isupdatefriend=false;





}