从其他窗口获取 ListView 项目文本

发布于 2024-12-06 18:58:02 字数 1077 浏览 4 评论 0原文

我想制作一个小应用程序来更改 Windows 7 中的默认播放设备。唯一的解决方案是与声音小程序交互。我成功获取了包含设备名称的 SysListView32 窗口的句柄，但无法从 ListView 获取文本。

这是使用的代码：

IntPtr sListView = (window handle received from another function)
LVITEM lvi = new LVITEM();
lvi.mask = LVIF_TEXT;
lvi.cchTextMax = 1024;
lvi.iItem = 0; // i tried with a loop trought all the items
lvi.iSubItem = 0;
lvi.pszText = Marshal.AllocHGlobal(1024);

IntPtr ptrLvi = Marshal.AllocHGlobal(Marshal.SizeOf(lvi));
Marshal.StructureToPtr(lvi, ptrLvi, false);

SendMessage(sListView, (int)WinMesages.LVM_GETITEMW, IntPtr.Zero, ptrLvi);

string strLvi = Marshal.PtrToStringAuto(lvi.pszText);

结果（strLvi）是一些中文字母。脚本中有什么问题？

更新：LVITEM结构是这样的：

private struct LVITEM
{
    public uint mask;
    public int iItem;
    public int iSubItem;
    public uint state;
    public uint stateMask;
    public IntPtr pszText;
    public int cchTextMax;
    public int iImage;
    public IntPtr lParam;
}

sLIstView句柄是正确的...在spy++中检查过。我需要执行什么测试来检查问题出在哪里？如果有帮助的话我可以给你所有的脚本。

原文

I want to make a little application that changes the default playback device in windows 7. The only solution was to interact with the Sound Applet. I succeeded to get the handle to the SysListView32 window that has the devices name but i cant get the text from the ListView.

This is the code used:

IntPtr sListView = (window handle received from another function)
LVITEM lvi = new LVITEM();
lvi.mask = LVIF_TEXT;
lvi.cchTextMax = 1024;
lvi.iItem = 0; // i tried with a loop trought all the items
lvi.iSubItem = 0;
lvi.pszText = Marshal.AllocHGlobal(1024);

IntPtr ptrLvi = Marshal.AllocHGlobal(Marshal.SizeOf(lvi));
Marshal.StructureToPtr(lvi, ptrLvi, false);

SendMessage(sListView, (int)WinMesages.LVM_GETITEMW, IntPtr.Zero, ptrLvi);

string strLvi = Marshal.PtrToStringAuto(lvi.pszText);

The result (strLvi) are some chinese letters. What is wrong in the script?

UPDATE: LVITEM struct is this:

private struct LVITEM
{
    public uint mask;
    public int iItem;
    public int iSubItem;
    public uint state;
    public uint stateMask;
    public IntPtr pszText;
    public int cchTextMax;
    public int iImage;
    public IntPtr lParam;
}

The sLIstView handle is correct... a checked in spy++.
What test do i need to perform to check where is the problem? I could give you all the script if that would help.

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