如何在64位系统上用sendmessage发送消息获得listview控件的item信息？

mariowjf 2007-04-16 01:30:25

我用一下方法来获得另一个进程中的listview控件的item文本，
Dim hProc, lpText, lpExText, lpItem, lpExItem As IntPtr
Dim nProcId As Integer = Process.GetProcessesByName(APP_NAME)(0).Id
hProc = OpenProcess(PROCESS_VM_OPERATION Or PROCESS_VM_READ Or PROCESS_VM_WRITE, False, nProcId)
' write string in external process's memory
Dim strText As String = " "
lpText = Marshal.StringToHGlobalAnsi(strText)
Dim nSizeText As Integer = strText.Length * Marshal.SizeOf("a"c)
lpExText = VirtualAllocEx(hProc, 0, nSizeText, MEM_COMMIT, PAGE_READWRITE)
Dim nResult As Integer '= WriteProcessMemory(hProc, lpExText, lpText, nSizeText, 0&)
' write LVITEM structure in external process's memory
Dim item As LVITEM
item.mask = LVIF_TEXT
item.iItem = nIndex
item.pszText = lpExText
item.cchTextMax = nSizeText
Dim nSizeItem As Integer = Marshal.SizeOf(item)
lpItem = Marshal.AllocHGlobal(nSizeItem)
Marshal.StructureToPtr(item, lpItem, True)
lpExItem = VirtualAllocEx(hProc, 0, nSizeItem, MEM_COMMIT, PAGE_READWRITE)
nResult = WriteProcessMemory(hProc, lpExItem, lpItem, nSizeItem, 0&)
' get list view item text
Dim nLength As Integer = SendMessage(hctrl, LVM_GETITEMTEXTA, nIndex, lpExItem)
' read the list view item text from external process's momery
nResult = ReadProcessMemory(hProc, lpExText, lpText, nSizeText, 0&)
strText = Marshal.PtrToStringAnsi(lpText)
' clean momery
nResult = VirtualFreeEx(hProc, lpExText, 0, MEM_RELEASE)
lpExText = IntPtr.Zero
nResult = VirtualFreeEx(hProc, lpExItem, 0, MEM_RELEASE)
lpExItem = IntPtr.Zero
Marshal.FreeHGlobal(lpText)
lpText = IntPtr.Zero
Marshal.FreeHGlobal(lpItem)
lpItem = IntPtr.Zero
CloseHandle(hProc)
hProc = IntPtr.Zero
Return strText

以上代码在32位系统上可以正常运行，但换到64位系统上就不行，sendmessage函数总是返回0，我试过用sendmessage发送LVM_GETITEMRECT消息在64位系统上是可以成功的，所以我觉得也许是字符串格式造成的问题，但我把LVM_GETITEMTEXTA改为LVM_GETITEMTEXTW还是不行，恳请哪位大虾指点迷津，最好说具体些，给分100，谢谢啊～～

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mariowjf 2008-08-21

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具体是应该怎么处理？应该注意什么方面？谢谢

北京的雾霾天 2007-04-17

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在６４位机上，你可能要正确的处理消息Message中的两个参数高低位的问题，如果处理的不正确就不会得到正确的结果，这就像从１６位到３２位一样.

Red_angelX 2007-04-17

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不晓得。。。64bit下很多工具失效

多年前上传过这个软件的第一个32位版的，到现在64位操作系统占了主流发现之前的32位版本很多如Windows的服务列表读取不了(最初写这个软件就是为了读取Windows服务列表)，所以写了这个64位版本的。没有什么别的改进只是能读取64的SysListView32控件。这个软件只能运行在64位Windows下，能读取32位和64位的表格

Description: The attached code demonstrates a technique you can use to create multiline balloon tooltips for ListView items.The code is based on the following simple idea. In the MouseMove event you need to check the index of the item under the mouse pointer, and if this item is changed, you simply redefine the text of the tooltip attached to the ListView control. Notice that you should destroy the tooltip if there is no any item under the mouse pointer.To determine the index of the list-view item under the mouse pointer, we send the LVM_HITTEST message to the ListView control. The SendMessage function you should use to send this message returns the index of the item at the specified position, if any, or -1 otherwise. Before you send the message, populate the pt field of an instance of the LVHITTESTINFO structure with the coordinates of the mouse pointer (you pass the reference to this structure as the value of the lParam parameter in SendMessage). You can use for this purpose the X and Y parameters of the MouseMove event of the control, but draw attention at the fact that these parameters can be measured in twips and you need to convert them in pixels.This simple idea can be used to create such tooltips for ListBox items, any grid control items and so on. For instance, we use this technique in extra samples for iGrid ActiveX Control we produce (this is an editable replacement for ListView and FlexGrid

public class MainActivity extends Activity { ListView list; LazyAdapter adapter; private static String HOST = "http://121.199.65.88/tpcms/"; String url = "http://121.199.65.88//tpcms/index.php?s=home/Index/goods/type/1/sort/price_asc/page/2"; LazyAdapter eshopListAdapter = null; ArrayList arraylist = new ArrayList(); Handler h = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); //获得数据 ArrayList list1=productInfo((String)msg.obj); showInfoImage(list1); } }; @Override public void onCreate(Bundle savedInstanceState) { System.out.println("sdjklajsdklfj"); super.onCreate(savedInstanceState); setContentView(R.layout.main); list=(ListView)findViewById(R.id.list); new Thread() { @Override public void run() { super.run(); String str = new GetDataFromJson(MainActivity.this).getData(url); Message m = new Message(); m.obj = str; h.sendMessage(m); } }.start(); } /** * 显示商品图片 */ private void showInfoImage(final ArrayList arr) { eshopListAdapter = new LazyAdapter(this, arr) { @Override public View layoutView(ArrayList list, int position, View view) { View vi = view; if (view == null) //将布局做成一个view vi = LayoutInflater.from(MainActivity.this).inflate(R.layout.item3, null); //实例化控件 final ImageView iv = (ImageView) vi.findViewById(R.id.iv); final TextView text = (TextView) vi.findViewById(R.id.textview); final ProgressBar shopLoadBox = (ProgressBar) vi.findViewById(R.id.goods_load_box); vi.setTag(list.get(position));// 設計所有商店信息 imageLoader.DisplayImage(HOST+ arr.get(position).getImage(), iv); text.setText(arr.get(position).getTitle()); return vi; } }; list.setAdapter(eshopListAdapter); } /** * 封装商品信息 */ public ArrayList productInfo(String json) { try { JSONObject jsonObj = new JSONObject(json); int reponse = jsonObj.getInt("reponse"); String message = jsonObj.getString("messages"); String count = jsonObj.getString("count"); JSONArray arr = jsonObj.getJSONArray("goodslist"); for(int i=0;i

关键代码 HANDLE hProcess; LVITEM *pointer; HWND hwnd,hListview; int headerhwnd; //listview控件的列头句柄 int rows,cols; //listview控件中的行列数 DWORD ProcessID = NULL; DWORD ThreadID = NULL; hwnd = (HWND)::

原理：进程之间是相互隔离的，数据是不能共享的（有些特例）　　　LVM_GETTITEMTEXT：将一个数据缓冲区提供给listview32控件，你不能把你的进程的数据缓冲提供给另外的程序，所以要用openprocess 打开“任务管理器”进程, 然后　　在“任务管理器进程”中申请足够长度的内存(VirualAllocEx)，将这个内存地址提供给listview32,使用 sendmess

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