c# - 如何确定 C# 中当前聚焦进程的名称

Question

例如，如果用户当前正在运行 VS2008，那么我需要值 VS2008。

Answer 1

我假设您想获取拥有当前焦点窗口的进程的名称。使用一些 P/Invoke:

// The GetForegroundWindow function returns a handle to the foreground window
// (the window  with which the user is currently working).
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern IntPtr GetForegroundWindow();

// The GetWindowThreadProcessId function retrieves the identifier of the thread
// that created the specified window and, optionally, the identifier of the
// process that created the window.
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern Int32 GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

// Returns the name of the process owning the foreground window.
private string GetForegroundProcessName()
{
    IntPtr hwnd = GetForegroundWindow();

    // The foreground window can be NULL in certain circumstances, 
    // such as when a window is losing activation.
    if (hwnd == null)
        return "Unknown";

    uint pid;
    GetWindowThreadProcessId(hwnd, out pid);

    foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcesses())
    {
        if (p.Id == pid)
            return p.ProcessName;
    }

    return "Unknown";
}