資源簡(jiǎn)介
超時(shí)鎖屏功能，前提：
系統(tǒng)為WinForm實(shí)現(xiàn)，中有一個(gè)主窗體；
1、當(dāng)用戶鍵鼠無操作超過10分鐘，則鎖定該系統(tǒng)(當(dāng)前項(xiàng)目)；
2、鎖屏后彈出用戶登錄界面，登陸界面兩個(gè)輸入框，用戶名、密碼（均為simed）；
3、鎖屏后用戶無法對(duì)系統(tǒng)其他頁面做任何操作，僅能在登錄界面錄入用戶名、密碼，實(shí)現(xiàn)登錄；
4、登陸成功后，關(guān)閉登錄界面，系統(tǒng)恢復(fù)可錄入狀態(tài)；
5、主界面為Winform，一個(gè)Richtextbox，能夠演示鎖屏后無法操作，登錄后可繼續(xù)操作即可；
6、登錄失敗則提示“用戶名或密碼錯(cuò)誤”，繼續(xù)停留在登陸界面，錄入的用戶名保留，密碼框清空，密碼框獲得焦點(diǎn)；
目前設(shè)置30秒就超時(shí)。
代碼片段和文件信息
using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Runtime.InteropServices;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;
namespace?LockScreenCS
{
????public?partial?class?FmLogin?:?Form
????{
????????public?FmLogin（）
????????{
????????????InitializeComponent（）;
????????}
????????public?FmLogin（bool?bl）?//超時(shí)登錄走這個(gè)
????????{
????????????InitializeComponent（）;
????????????isTimer?=?bl;
????????}
????????/***************獲取鼠標(biāo)鍵盤未操作時(shí)間***************************/
????????[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;
????????}
????????/***************獲取鼠標(biāo)鍵盤未操作時(shí)間***************************/
????????public?static?bool?isTimer?=?false;//判斷是否是超時(shí)了
????????private?void?Login_Load（object?sender?EventArgs?e）
????????{
????????????this.timer1.Interval?=?10000;//定時(shí)器
????????????this.timer1.Enabled?=?true;//啟動(dòng)
????????}
????????private?void?btnLogin_Click（object?sender?EventArgs?e）
????????{
????????????if?（string.IsNullOrEmpty（txtUser.Text.Trim（））||string.IsNullOrEmpty（txtPwd.Text.Trim（）））
????????????{
????????????????MessageBox.Show（“用戶名或密碼不能為空！“）;
????????????????txtUser.Focus（）;
????????????}
????????????else
????????????{
????????????????if?（txtUser.Text.Trim（）?==?“simed“?&&?txtPwd.Text.Trim（）?==?“simed“）
????????????????{
????????????????????this.Hide（）;
????????????????????if?（isTimer?==?false）//正常登錄
????????????????????{
????????????????????????FmMain?fm?=?new?FmMain（）;?//跳轉(zhuǎn)
????????????????????????fm.Show（）;
????????????????????}
????????????????}
????????????????else
????????????????{
????????????????????MessageBox.Show（“用戶名或密碼錯(cuò)誤！“）;
????????????????????txtPwd.Text?=?““;
????????????????????txtPwd.Focus（）;//獲得焦點(diǎn)
????????????????}
????????????}
????????}
????????private?void?btnCancel_Click（object?sender?EventArgs?e）
????????{
????????????txtUser.Text?=?““;
????????????txtPwd.Text?=?““;
????????}
????????///?
????????///?keyDown判斷是否是enter鍵，進(jìn)行登錄事件
????????///?
????????///?
????????///?
????????private?void?txtPwd_KeyDown（object?sender?KeyEventArgs?e）
????????{
????????????if?（e.KeyCode?==?Keys.Return）//enter鍵?==（char）13也可
????????????{
????? ?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????187??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\App.config
?????文件??????13824??2013-07-17?16:56??LockScreenCSPro22\LockScreenCS\bin\Debug\LockScreenCS.exe
?????文件????????187??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\bin\Debug\LockScreenCS.exe.config
?????文件??????38400??2013-07-17?16:56??LockScreenCSPro22\LockScreenCS\bin\Debug\LockScreenCS.pdb
?????文件??????22984??2013-07-18?09:14??LockScreenCSPro22\LockScreenCS\bin\Debug\LockScreenCS.vshost.exe
?????文件????????187??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\bin\Debug\LockScreenCS.vshost.exe.config
?????文件????????490??2012-06-06?02:06??LockScreenCSPro22\LockScreenCS\bin\Debug\LockScreenCS.vshost.exe.manifest
?????文件???????5371??2013-07-17?16:55??LockScreenCSPro22\LockScreenCS\FmLogin.cs
?????文件???????5439??2013-07-17?15:48??LockScreenCSPro22\LockScreenCS\FmLogin.Designer.cs
?????文件???????6011??2013-07-17?10:57??LockScreenCSPro22\LockScreenCS\FmLogin.resx
?????文件????????530??2013-07-17?10:57??LockScreenCSPro22\LockScreenCS\FmMain.cs
?????文件???????2235??2013-07-17?10:57??LockScreenCSPro22\LockScreenCS\FmMain.Designer.cs
?????文件???????5817??2013-07-17?10:57??LockScreenCSPro22\LockScreenCS\FmMain.resx
?????文件???????4446??2013-07-17?15:48??LockScreenCSPro22\LockScreenCS\LockScreenCS.csproj
?????文件???????1308??2013-07-16?13:49??LockScreenCSPro22\LockScreenCS\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件???????6931??2013-07-17?15:48??LockScreenCSPro22\LockScreenCS\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????文件????????703??2013-07-18?09:14??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.csproj.FileListAbsolute.txt
?????文件???????1098??2013-07-17?16:47??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.csproj.GenerateResource.Cache
?????文件??????13824??2013-07-17?16:56??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.exe
?????文件????????180??2013-07-17?16:47??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.FmLogin.resources
?????文件????????180??2013-07-17?16:47??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.FmMain.resources
?????文件??????38400??2013-07-17?16:56??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.pdb
?????文件????????180??2013-07-17?16:47??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.Properties.Resources.resources
?????文件????????180??2013-07-17?16:47??LockScreenCSPro22\LockScreenCS\obj\Debug\LockScreenCS.TestTimer.resources
?????文件??????????0??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
?????文件??????????0??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
?????文件??????????0??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
?????文件????????623??2013-07-17?15:48??LockScreenCSPro22\LockScreenCS\Program.cs
?????文件???????1362??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\Properties\AssemblyInfo.cs
?????文件???????2876??2013-07-16?12:50??LockScreenCSPro22\LockScreenCS\Properties\Resources.Designer.cs
............此處省略170個(gè)文件信息
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