這個問題來自論壇提問
Q:當我登錄進入主界面時,在規定的時間內沒有做任何操作,系統就注銷(就像電腦的屏保)。
A: 其實很簡單,參考一個api函數就可以了:GetLastInputInfo,以下是參考代碼
演示程序在你10秒內沒有任何鼠標鍵盤活動既最小化,最小化後晃動鼠標即可復原
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsApplication28
...{
public partial class Form1 : Form
...{
[StructLayout(LayoutKind.Sequential)]
public struct LASTINPUTINFO
...{
[MarshalAs(UnmanagedType.U4)]
public int cbSize;
[MarshalAs(UnmanagedType.U4)]
public uint dwTime;
}
[DllImport("user32.dll")]
public static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
public long getIdleTick()
...{
LASTINPUTINFO vLastInputInfo = new LASTINPUTINFO();
vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);
if (!GetLastInputInfo(ref vLastInputInfo)) return 0;
return Environment.TickCount - (long)vLastInputInfo.dwTime;
}
public Form1()
...{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
...{
this.timer1.Interval = 2000;
this.timer1.Enabled = true;
}
private void timer1_Tick(object sender, EventArgs e)
...{
long i = getIdleTick();
this.Text = string.Format("jinjazz說:您已經{0}ms沒有動了",i);
if (i > 10 * 1000)
...{
this.WindowState = FormWindowState.Minimized;
}
else
...{
this.WindowState = FormWindowState.Normal;
}
}
}
}