Using TREEVIEW, how do I know which item I selected?

Question

2.00/5 (1 vote)

See more:

TreeView list:

root
|--aa
|--bb

How can i do when i click aa item show message "aa was clicked",when i click bb item show message "bb was cilcked"?

Only using WINDOWS API No MFC?

please help me,this is really important to me!!

What I have tried:

case WM_NOTIFY:
if(((LPNMHDR)lParam)->code == NM_LCLICK) // Right Click
{
Selected=(HTREEITEM)SendDlgItemMessage (hWndList,
IDC_TREE1,TVM_GETITEM,TVGN_TARET,0);
if(Selected==NULL)
{
MessageBox();
break;
}

SendDlgItemMessage(hWndList,IDC_TREE1,
TVM_SELECTITEM,TVGN_CARET,(LPARAM)Selected);
}
break;

this is what i did,but i can't get the infomation of the item i clicked.
can you give me some advise,codes will be better!thank you!

Posted 25-Apr-16 22:04pm

Member 12484930

Updated 25-Apr-16 22:36pm

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Comments

Sergey Alexandrovich Kryukov 26-Apr-16 4:26am

Are you sure that hWndList is really the dialog, a parent of right tree view?
TVGN_TARET would not compile...
—SA

Member 12484930 26-Apr-16 4:34am

sorry it's TVGN_CARET,type wrong~
and can you tell me how to get the item i selected?
i want to show a message when i clicked the "aa" item.
can you give me a little code?
i am the beginner on TREEVIEW section please.

Sergey Alexandrovich Kryukov 26-Apr-16 4:38am

I explained 100% in my answer, it should be more than enough. All you need is to pay more attention while reading MSDN and strictly follow the function profile and the documentation.

Next time, never ever enter code on the Web page, always paste it from real code at least validated by compiling.

—SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2016-04-25T22:36:00

You are doing it wrong. You don't pass a pointer to LVITEM structure which is needed to receive the information on the item. Instead, you cast the function result, which merely returns TRUE or FALSE, indicating success or failure, but never a pointer as you incorrectly assumed.

Please see:
LVM_GETITEM message (Windows)[^],
https://msdn.microsoft.com/en-us/library/windows/desktop/bb774760(v=vs.85).aspx[^].

Besides, I'm not sure you correctly use SendDlgItemMessage; you can choose between this function or SendMessage. This is explained here: https://support.microsoft.com/en-us/kb/12273[^].

Alternatively, you can use the macro ListView_GetItem:
ListView_GetItem macro (Windows)[^].

—SA