从64位的SysListView32获取文本

这是我的代码:

public static string ReadListViewItem(IntPtr lstview, int item) { const int dwBufferSize = 1024; int dwProcessID; LV_ITEM lvItem; string retval; bool bSuccess; IntPtr hProcess = IntPtr.Zero; IntPtr lpRemoteBuffer = IntPtr.Zero; IntPtr lpLocalBuffer = IntPtr.Zero; IntPtr threadId = IntPtr.Zero; try { lvItem = new LV_ITEM(); lpLocalBuffer = Marshal.AllocHGlobal(dwBufferSize); // Get the process id owning the window threadId = GetWindowThreadProcessId(lstview, out dwProcessID); if ((threadId == IntPtr.Zero) || (dwProcessID == 0)) throw new ArgumentException("hWnd"); // Open the process with all access hProcess = OpenProcess(PROCESS_ALL_ACCESS, false, dwProcessID); if (hProcess == IntPtr.Zero) throw new ApplicationException("Failed to access process"); // Allocate a buffer in the remote process lpRemoteBuffer = VirtualAllocEx(hProcess, IntPtr.Zero, dwBufferSize, MEM_COMMIT, PAGE_READWRITE); if (lpRemoteBuffer == IntPtr.Zero) throw new SystemException("Failed to allocate memory in remote process"); // Fill in the LVITEM struct, this is in your own process // Set the pszText member to somewhere in the remote buffer, // For the example I used the address imediately following the LVITEM stuct lvItem.mask = LVIF_TEXT; lvItem.iItem = item; lvItem.iSubItem = 2; lvItem.pszText = (IntPtr)(lpRemoteBuffer.ToInt32() + Marshal.SizeOf(typeof(LV_ITEM))); lvItem.cchTextMax = 50; // Copy the local LVITEM to the remote buffer bSuccess = WriteProcessMemory(hProcess, lpRemoteBuffer, ref lvItem, Marshal.SizeOf(typeof(LV_ITEM)), IntPtr.Zero); if (!bSuccess) throw new SystemException("Failed to write to process memory"); // Send the message to the remote window with the address of the remote buffer SendMessage(lstview, LVM_GETITEMText, 0, lpRemoteBuffer); // Read the struct back from the remote process into local buffer bSuccess = ReadProcessMemory(hProcess, lpRemoteBuffer, lpLocalBuffer, dwBufferSize,IntPtr.Zero); if (!bSuccess) throw new SystemException("Failed to read from process memory"); // At this point the lpLocalBuffer contains the returned LV_ITEM structure // the next line extracts the text from the buffer into a managed string retval = Marshal.PtrToStringAnsi((IntPtr)(lpLocalBuffer + Marshal.SizeOf(typeof(LV_ITEM)))); } finally { if (lpLocalBuffer != IntPtr.Zero) Marshal.FreeHGlobal(lpLocalBuffer); if (lpRemoteBuffer != IntPtr.Zero) VirtualFreeEx(hProcess, lpRemoteBuffer, 0, MEM_RELEASE); if (hProcess != IntPtr.Zero) CloseHandle(hProcess); } return retval; } 

无论我做什么retval返回空,虽然lpLocalBuffer没有。

这是ListItem的def:

  [StructLayout(LayoutKind.Sequential)] private struct LV_ITEM { public int mask; public int iItem; public int iSubItem; public int state; public int stateMask; public IntPtr pszText; public int cchTextMax; public int iImage; internal int lParam; internal int iIndent; } 

我尝试编译86x,64bit,任何cpu,似乎没有任何工作!

知道为什么会这样吗?

C#+ .net4,windows 7 64位。

这是一种不同的方法 – 使用UI自动化 。 它为您执行跨进程,跨位工作,并且可以对列表视图,列表框或几乎任何其他标准Windows UI起作用。 这是一个示例应用程序,它将从鼠标指针下的列表视图中获取HWND,并将项目转储到其中。 它只转储每个项目的名称; 使用Listviews,我想你可以根据需要递归到每个项目的字段中。

 // Compile using: csc ReadListView.cs /r:UIAutomationClient.dll using System; using System.Windows.Automation; using System.Runtime.InteropServices; class ReadListView { public static void Main() { Console.WriteLine("Place pointer over listview and hit return..."); Console.ReadLine(); // Get cursor position, then the window handle at that point... POINT pt; GetCursorPos(out pt); IntPtr hwnd = WindowFromPoint(pt); // Get the AutomationElement that represents the window handle... AutomationElement el = AutomationElement.FromHandle(hwnd); // Walk the automation element tree using content view, so we only see // list items, not scrollbars and headers. (Use ControlViewWalker if you // want to traverse those also.) TreeWalker walker = TreeWalker.ContentViewWalker; int i = 0; for( AutomationElement child = walker.GetFirstChild(el) ; child != null; child = walker.GetNextSibling(child) ) { // Print out the type of the item and its name Console.WriteLine("item {0} is a \"{1}\" with name \"{2}\"", i++, child.Current.LocalizedControlType, child.Current.Name); } } [StructLayout(LayoutKind.Sequential)] private struct POINT { public int x; public int y; }; [DllImport("user32.dll")] private static extern IntPtr WindowFromPoint(POINT pt); [DllImport("user32.dll")] private static extern int GetCursorPos(out POINT pt); } 

我知道这是旧的,但我在试图解决我的问题时找到了它,希望这会帮助别人。

我使用了这个问题中的建议,即C ++,稍微修改了LV_ITEM结构,使其在VB.NET中使用64位(我没有在C#中测试,但我想这个解决方案非常相似。)

 Public Structure LV_ITEM64 Public mask As Integer Public iItem As Integer Public iSubItem As Integer Public state As Integer Public stateMask As Integer Public placeholder1 As Integer Public pszText As Integer Public placeholder2 As Integer Public cchTextMax As Integer Public iImage As Integer End Structure 

然后,在声明结构的实例时,我使用以下代码在64位和32位结构之间进行选择:

 Dim lvi As Object If IntPtr.Size = 4 Then lvi = New LV_ITEM Else lvi = New LV_ITEM64 End If 

您已经明确表示您正在尝试将32位进程中的列表视图控件中的项读取到另一个64位进程中。

我在各种论坛上看到过很多关于这个主题的问题,似乎没有一个人能够取得成功。

我认为你最好的选择是创建一个32位可执行文件,它可以读出其他程序的列表视图。

如果您的程序是32位且目标程序是64位,则至少有一个障碍需要克服。 或者相反。 LVITEM声明是错误的,IntPtr的位数错误。 这使得Marshal.SizeOf()返回错误的值。 我认为,对齐是可以的。 将字段更改为int或long可以解决问题,具体取决于目标程序的位数。 您可以通过查看Taskmgr.exe,进程选项卡找到它。 如果进程名称是32位进程,则使用“* 32”进行后固定。 或者通过将项目的Target平台设置设置为与目标进程(x86或AnyCPU)匹配来避免麻烦。

使用Debug + Windows + Memory + Memory1进行调试。 将“lpLocalBuffer”放在“地址”框中,观察您所看到的内容与您的代码所读取的内容。 您绝对应该能够从hex视图中判断出您是否正确使用了字符串。 请注意,如果在字符串字符之间看到零,则目标进程使用列表视图的Unicode版本。 然后需要Marshal.PtrToStringUnicode读取它。

对不起,我的回复太晚了,但我遇到了同样的问题。 这是我用于VB.NET的结构,它适用于32位和64位系统。

  _ Public Structure LV_ITEM Public Mask As UInteger Public Index As Integer Public SubIndex As Integer Public State As Integer Public StateMask As IntPtr Public Text As String Public TextLength As Integer Public ImageIndex As Integer Public LParam As IntPtr End Structure