C#遍历进程获取主窗口句柄
wyq1153
C#遍历进程获取主窗口句柄
当我们启动一个程序，用 Process process = Process.Start(path);//path是程序的绝对路径 启动时，获取的process.Handle其实是进程的句柄，并不是窗口的句柄，而有时process.MainWindowHandle却等于0
此时就需要用枚举来获取启动进程的主窗口句柄了，代码如下：
/// <summary>
/// 用于枚举子窗体是的委托
/// </summary>
/// <param name="WindowHandle">窗体句柄</param>
/// <param name="num">自定义</param>
/// <returns></returns>
public delegate bool EnumChildWindow(IntPtr WindowHandle, string num);
/// <summary>
/// 获取指定窗体的所有子窗体
/// </summary>
/// <param name="WinHandle">窗体句柄</param>
/// <param name="ec">回调委托</param>
/// <param name="name">自定义</param>
/// <returns></returns>
[DllImport("User32.dll")]
public static extern int EnumChildWindows(IntPtr WinHandle, EnumChildWindow ecw, string name);
/// <summary>
/// 获取指定窗体的标题
/// </summary>
/// <param name="WinHandle">窗体句柄</param>
/// <param name="Title">缓冲区取用于存储标题</param>
/// <param name="size">缓冲区大小</param>
/// <returns></returns>
[DllImport("User32.dll")]
public static extern int GetWindowText(IntPtr WinHandle, StringBuilder Title, int size);
/// <summary>
/// 获取窗体类型
/// </summary>
/// <param name="WinHandle">窗体句柄</param>
/// <param name="Type">类型</param>
/// <param name="size">缓冲区大小</param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern int GetClassName(IntPtr WinHandle, StringBuilder Type, int size);
/// <summary>
/// 根据句柄获得进程id值
/// </summary>
/// <param name="handle">句柄</param>
/// <param name="pid"></param>
/// <returns></returns>
[DllImport("user32")]
private static extern int GetWindowThreadProcessId(IntPtr handle, out int pid);
IntPtr mainHwnd = IntPtr.Zero;//登录窗口句柄
string typeName = string.Empty;//启动程序的窗口标题
/// <summary>
/// 枚举窗体
/// </summary>
/// <param name="handle"></param>
/// <param name="num"></param>
/// <returns></returns>
private bool EnumChild(IntPtr handle, string num)
{
StringBuilder title = new StringBuilder();
//StringBuilder type = new StringBuilder();
title.Length = 100;
//type.Length = 100;
GetWindowText(handle, title, 100);//取标题
//GetClassName(handle, type, 100);//取类型
if (title.ToString() == typeName)
{
mainHwnd = handle;
return false;
}
return true;
}
//代码调用
pubilc boolTest()
{
FileVersionInfo myFileVersion = FileVersionInfo.GetVersionInfo(path);
typeName = myFileVersion.ProductName;//获取程序产品名称
int waitTime = 0;
while (true)
{
EnumChildWindow ecw = new EnumChildWindow(EnumChild);
EnumChildWindows(mainWindowHandle, ecw, "");
GetWindowRect(mainHwnd.ToInt32(), ref rectMain);
int pid = 0;
GetWindowThreadProcessId(mainHwnd, out pid);
//rectMain.Height - rectMain.Y < 300说明是登录窗口
if (mainHwnd != IntPtr.Zero && process.Id == pid && rectMain.Height - rectMain.Y < 300)//276
break;
waitTime++;
//30秒没打开程序，登录失败
if (waitTime >= 30)
return false;
Thread.Sleep(1000);
}
return true;
}
=========================================================================
另外一个参考：
public class User32API
{
private static Hashtable processWnd = null;
public delegate bool WNDENUMPROC(IntPtr hwnd, uint lParam);
static User32API()
{
if (processWnd == null)
{
processWnd = new Hashtable();
}
}
[DllImport("user32.dll", EntryPoint = "EnumWindows", SetLastError = true)]
public static extern bool EnumWindows(WNDENUMPROC lpEnumFunc, uint lParam);
[DllImport("user32.dll", EntryPoint = "GetParent", SetLastError = true)]
public static extern IntPtr GetParent(IntPtr hWnd);
[DllImport("user32.dll", EntryPoint = "GetWindowThreadProcessId")]
public static extern uint GetWindowThreadProcessId(IntPtr hWnd, ref uint lpdwProcessId);
[DllImport("user32.dll", EntryPoint = "IsWindow")]
public static extern bool IsWindow(IntPtr hWnd);
[DllImport("kernel32.dll", EntryPoint = "SetLastError")]
public static extern void SetLastError(uint dwErrCode);
public static IntPtr GetCurrentWindowHandle()
{
IntPtr ptrWnd = IntPtr.Zero;
uint uiPid = (uint)Process.GetCurrentProcess().Id; // 当前进程 ID
object objWnd = processWnd[uiPid];
if (objWnd != null)
{
ptrWnd = (IntPtr)objWnd;
if (ptrWnd != IntPtr.Zero && IsWindow(ptrWnd)) // 从缓存中获取句柄
{
return ptrWnd;
}
else
{
ptrWnd = IntPtr.Zero;
}
}
bool bResult = EnumWindows(new WNDENUMPROC(EnumWindowsProc), uiPid);
// 枚举窗口返回 false 并且没有错误号时表明获取成功
if (!bResult && Marshal.GetLastWin32Error() == 0)
{
objWnd = processWnd[uiPid];
if (objWnd != null)
{
ptrWnd = (IntPtr)objWnd;
}
}
return ptrWnd;
}
private static bool EnumWindowsProc(IntPtr hwnd, uint lParam)
{
uint uiPid = 0;
if (GetParent(hwnd) == IntPtr.Zero)
{
GetWindowThreadProcessId(hwnd, ref uiPid);
if (uiPid == lParam) // 找到进程对应的主窗口句柄
{
processWnd[uiPid] = hwnd; // 把句柄缓存起来
SetLastError(0); // 设置无错误
return false; // 返回 false 以终止枚举窗口
}
}
return true;
}
}
调用User32API.GetCurrentWindowHandle()即可返回当前进程的主窗口句柄，如果获取失败则返回IntPtr.Zero。
转自/slyzly/articles/2331487.html
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