我正在尝试创建一个可以通过输入挂钩记录用户不活动的应用程序,但是我现在卡住了,因为编译器抛出错误说
an object reference is required for the non-static field, method, or property 'NotifyIcon.InputHook.MouseHookProcedure'
这是我的不活动自定义事件处理程序代码
public void inactivity_Active(object sender, EventArgs e)
{
if (InputHook.hHook == 0)
{
InputHook.MouseHookProcedure = new InputHook.HookProc(InputHook.MouseHookProc);
InputHook.hHook = InputHook.SetWindowsHookEx(InputHook.WH_MOUSE,
InputHook.MouseHookProcedure,
(IntPtr)0,
AppDomain.GetCurrentThreadId());
}
对于我的InputHook类,这会设置Input Hook
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace NotifyIcon
{
public class InputHook
{
public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);
public static int hHook = 0;
public const int WH_MOUSE = 7;
public HookProc MouseHookProcedure;
[StructLayout(LayoutKind.Sequential)]
public class POINT
{
public int x;
public int y;
}
[StructLayout(LayoutKind.Sequential)]
public class MouseHookStruct
{
public POINT pt;
public int hwnd;
public int wHitTestCode;
public int dwExtraInfo;
}
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn,
IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode,
IntPtr wParam, IntPtr lParam);
public static int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
//Marshall the data from the callback.
MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
if (nCode < 0)
{
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
else
{
//Create a string variable that shows the current mouse coordinates.
String strCaption = "x = " +
MyMouseHookStruct.pt.x.ToString("d") +
" y = " +
MyMouseHookStruct.pt.y.ToString("d");
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
}
}
}
非常感谢这个问题的任何和所有帮助=]
答案 0 :(得分:0)
您需要将其设为静态,因为它不是实例属性
public static HookProc MouseHookProcedure;
答案 1 :(得分:0)
让它静止:
public static HookProc MouseHookProcedure;