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Hey guys, I need help. Here is the problem: I put a ListView and a ImageList on a form, need to add add dropped file icon to listview, and encounter some problems...(Thanks in advance)...

Here is what i did:

Approach 1:
1. Add one icon to the ImageList
2. Set ListView.Icons to ImageList
3. Set ListView.OLEDropMode to 1
4. In ListView.OleDragDrop Event, add ...
___a) check if GetFormat(15) is true
___b) use SHGetFileInfo() to get drop file name
___c) Get Icon handle
___d) API Call: ImageList_ReplaceIcon(hImageList, -1, hIcon), and return value is valid (2)
___e) call ListView.ListItems.Add() to add new Item, failed, index of out of bound
___f) check ImageList.ListImages.Count, it is one, which means no new icon is added


Approach Two:
1. Add one icon to the ImageList
2. SendMessage(hListView, 0x1003, 0, hImageList), failed, return is not valid (0), which mean cannot associate the Imagelist with ListView.


Any suggestion?
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Replies, comments and Discussions:

  • 工作学习 / IT技术讨论 / Hey guys, I need help. Here is the problem: I put a ListView and a ImageList on a form, need to add add dropped file icon to listview, and encounter some problems...(Thanks in advance)...
    Here is what i did:

    Approach 1:
    1. Add one icon to the ImageList
    2. Set ListView.Icons to ImageList
    3. Set ListView.OLEDropMode to 1
    4. In ListView.OleDragDrop Event, add ...
    ___a) check if GetFormat(15) is true
    ___b) use SHGetFileInfo() to get drop file name
    ___c) Get Icon handle
    ___d) API Call: ImageList_ReplaceIcon(hImageList, -1, hIcon), and return value is valid (2)
    ___e) call ListView.ListItems.Add() to add new Item, failed, index of out of bound
    ___f) check ImageList.ListImages.Count, it is one, which means no new icon is added


    Approach Two:
    1. Add one icon to the ImageList
    2. SendMessage(hListView, 0x1003, 0, hImageList), failed, return is not valid (0), which mean cannot associate the Imagelist with ListView.


    Any suggestion?
    • up
    • /.
    • 救不了你。几年前我做过半年Delphi程序员,和这些冬冬打过交道,现在已经忘光了。
      • 谢谢。
    • try this control. You can do what ever you want. Very powerful. I did some very complex treeview/listview application base on that. It is very fast.
      • Thank you too, I might consider it if there is no workaround of the #$%^ ListView
    • 自己解决了。。
      1. Plain API call 得到的Image Count 与调用COM 接口得到的并不一样。
      2. MSDN 上说ImageList_ReplaceIcon() 中的第二个参数index 设置成-1表示把Image add to Imagelist, 这个没有错。但是新加入的Image通过COM接口访问不到。
      3. 解决办法:预先将Icon加入到ImageList。在OLEDragDrop 方法中用新hIcon的替换现有的icon,