c#事件处理

  1 /*
  2 using System;
  3 using System.Text;
  4 using System.Runtime.InteropServices;
  5 using System.Reflection;
  6 using System.Windows.Forms;
  7 
  8 namespace MouseKeyboardLibrary
  9 { 
 10 /// <summary>
 11 /// Abstract base class for Mouse and Keyboard hooks
 12 /// </summary>
 13     public abstract class GlobalHook
 14     {
 15         #region Windows API Code
 16 
 17         [StructLayout(LayoutKind.Sequential)]
 18         protected class POINT
 19         {
 20             public int x;
 21             public int y;
 22         }
 23 
 24         [StructLayout(LayoutKind.Sequential)]
 25         protected class MouseHookStruct
 26         {
 27             public POINT pt;
 28             public int hwnd;
 29             public int wHitTestCode;
 30             public int dwExtraInfo;
 31         }
 32 
 33         [StructLayout(LayoutKind.Sequential)]
 34         protected class MouseLLHookStruct
 35         {
 36             public POINT pt;
 37             public int mouseData;
 38             public int flags;
 39             public int time;
 40             public int dwExtraInfo;
 41         }
 42 
 43         [StructLayout(LayoutKind.Sequential)]
 44         protected class KeyboardHookStruct
 45         {
 46             public int vkCode;
 47             public int scanCode;
 48             public int flags;
 49             public int time;
 50             public int dwExtraInfo;
 51         }
 52 
 53         [DllImport("user32.dll", CharSet = CharSet.Auto,
 54             CallingConvention = CallingConvention.StdCall,
 55             SetLastError = true)]
 56         protected static extern int setWindowsHookEx(
 57             int idHook, 
 58             HookProc lpfn,
 59             IntPtr hMod,
 60             int dwThreadId);
 61 
 62         [DllImport("user32", CharSet = CharSet.Auto,
 63             CallingConvention = CallingConvention.StdCall,
 64             SetLastError = true)]
 65         protected static extern int UnhookWindowsHookEx(int idHook);
 66 
 67         [DllImport("user32", CharSet = CharSet.Auto,
 68             CallingConvention = CallingConvention.StdCall)]
 69         protected static extern int CallNextHookEx(
 70             int idHook,
 71             int nCode,
 72             int wParam,
 73             IntPtr lParam);
 74 
 75         [DllImport("user32")]
 76         protected static extern int ToAscii(
 77             int uVirtKey,
 78             int uScanCode,
 79             byte[] lpbKeyState,
 80             byte[] lpwTransKey,
 81             int fuState);
 82 
 83         [DllImport("user32")]
 84         protected static extern int GetKeyboardState(byte[] pbKeyState);
 85 
 86         [DllImport("user32",CharSet=CharSet.Auto,CallingConvention =CallingConvention.StdCall)]
 87         protected static extern short GetKeyState(int vKey);
 88 
 89         protected delegate int HookProc(int nCode, int wParam, IntPtr lParam);
 90 
 91         protected const int WH_MOUSE_LL = 14;
 92         protected const int WH_KEYBOARD_LL = 13;
 93 
 94         protected const int WH_MOUSE = 7;
 95         protected const int WH_KEYBOARD = 2;
 96         protected const int WH_MOUSEMOVE = 0x200;
 97         protected const int WH_LBUTTONDOWN = 0x201;
 98         protected const int WH_RBUTTONDOWN = 0x204;
 99         protected const int WH_MBUTTONDOWN = 0x207;
100         protected const int WH_LBUTTONUP = 0x202;
101         protected const int WH_RBUTTONUP = 0x205;
102         protected const int WH_MBUTTONUP = 0x208;
103         protected const int WH_LBUTTONCLICK = 0x203;
104         protected const int WH_RBUTTONCLICK = 0x206;
105         protected const int WH_MBUTTONCLICK = 0x209;
106         protected const int WH_MOUSEWHEEL = 0x020a;
107         protected const int WH_KEYDOWN = 0x100;
108         protected const int WH_KEYUP = 0x101;
109         protected const int WH_SYSKEYDOWN = 0x104;
110         protected const int WH_SYSKEYUP = 0x105;
111 
112         protected const byte VK_SHIFTT = 0x10;
113         protected const byte VK_CAPITAL = 0x14;
114         protected const byte VK_NUMLOCK = 0x90;
115 
116         protected const byte VK_LSHIFT = 0xa0;
117         protected const byte VK_RSHIFT = 0xa1;
118         protected const byte VK_LCONTROL = 0xa2;
119         protected const byte VK_RCONTROL = 0xa3;
120         protected const byte VK_LALT = 0xa4;
121         protected const byte VK_RALT = 0xa5;
122 
123         protected const byte LLKHF_ALTDOWN = 0x20;
124 
125         #endregion
126 
127         #region Private Variables
128         protected int _hookType;
129         protected int _handleToHook;
130         protected bool _isStarted;
131         protected HookProc _hookCallback;
132         #endregion
133 
134 
135 
136 
137     }
138 }
139 */
140 
141 
142 
143 
144 
145 //写log文件
146 /*
147 using System;
148 using System.Collections.Generic;
149 using System.Linq;
150 using System.Text;
151 using System.Threading.Tasks;
152 //using System.Diagnostics;
153 using System.IO;
154 
155 
156 namespace ConsoleApplication1
157 {
158     class Program
159     {
160         //
161         static void Main(string[] args)
162         {
163 
164             //可以作为修改的内容
165             int i;
166             int j;
167 
168             //作除法的设置
169             try
170             {
171                 i = 0;
172                 j = 2 / i;
173             }
174             catch (Exception ex)
175             {
176                 WriteLog(ex);//set ex
177             }
178             finally
179             {
180                 j = 2 / 1;
181                 Console.Write(j);
182                 Console.ReadLine();
183             }
184         }
185 
186         ///<summary>
187         ///打印异常
188         ///</summary>
189         ///<param name="ex">异常</param>
190         ///<param name="LogAddress">日志文件地址</param>
191         public static void WriteLog(Exception ex, string LogAddress = "")
192         {
193             //if日志文件为空，默认在Debug目录下建立
194             //建立日志文件的标题
195             if (LogAddress == "")
196             {
197                 LogAddress = Environment.CurrentDirectory + '\\' +
198                     DateTime.Now.Year + '-' +
199                     DateTime.Now.Month + '-' +
200                     DateTime.Now.Day + "_Log.log";
201             }
202 
203             //将异常信息输出到文件
204             StreamWriter fs = new StreamWriter(LogAddress, true);
205             fs.WriteLine("当前信息:" + DateTime.Now.ToString());
206             fs.WriteLine("异常信息:" + ex.Message);
207             fs.WriteLine("异常信息:" + ex.Source);
208             fs.WriteLine("调用堆栈:\n" + ex.StackTrace.Trim());
209             fs.WriteLine("触发方法:" + ex.TargetSite);
210             fs.WriteLine();
211             fs.Close();//释放WriteLine内存
212         }
213     }
214 }
215 */
216 
217 //2018-10-10
218 //using events
219 //创建一个委托
220 //将创建委托与事件关联
221 //编写c#事件处理程序
222 //生成委托实例
223 //委托实例添加到产生事件对象的事件列表中，为订阅事件
224 //
225 /*
226 using System;
227 using System.Collections.Generic;
228 using System.Linq;
229 using System.Text;
230 
231 namespace Example_EventTest
232 {
233     class Judgment
234     { 
235         //define 委托
236         public delegate void delegateRun();
237         //define event
238         public event delegateRun eventRun;
239         //引发事件的方法
240         public void Begin()
241         {
242             eventRun();//被引发的事件
243         }
244 
245     }
246     class RunSports
247     { 
248         //define deal with events ways
249         public void Run()
250         {
251             Console.WriteLine("start and later end");
252         }
253     }
254     class Program
255     {
256         static void Main(string[] args)
257         {
258             RunSports runsport = new RunSports();//实例化事件发布者
259             Judgment judgment = new Judgment();//实例化事件订阅者
260             //订阅事件
261             judgment.eventRun +=new Judgment.delegateRun(runsport.Run);
262             //引发事件
263             judgment.Begin();
264             Console.ReadKey();
265 
266         }
267     }
268 }
269 */
270 
271 
272 using System;
273 using System.IO;
274 
275 namespace BoilerEventApp1
276 { 
277     //boiler类
278     class Boiler
279     {
280         private int temp;
281         private int pressure;
282         public Boiler(int t, int p)
283         {
284             temp = t;
285             pressure = p;
286         }
287         //temp,pressure
288         public int getTemp()
289         {
290             return temp;
291         }
292         public int getPressure()
293         {
294             return pressure;
295         }
296     }
297 
298     //事件发布器
299     class DelegateBoilerEvent
300     {
301         public delegate void BoilerLogHandler(string status);
302         //委托定义事件
303         public event BoilerLogHandler BoilerEventLog;
304         public void LogProgress()
305         { 
306             string remarks="o.k";
307             Boiler b = new Boiler(100, 12);
308             int t = b.getTemp();
309             int p = b.getPressure();
310             if (t > 150 || t < 80 || p < 12 || p > 15)
311             {
312                 remarks = "start one access";
313             }
314             //output message
315             OnBoilerEventLog("Logging Info:\n");
316             OnBoilerEventLog("Temparature"+t+"\nPressure:"+p);
317             OnBoilerEventLog("Message:"+remarks);
318         }
319         protected void OnBoilerEventLog(string message)
320         {
321             if (BoilerEventLog != null)
322             {
323                 BoilerEventLog(message);
324             }
325         }
326     }
327 
328     //保留该类写入日志文件
329     class BoilerInfoLogger
330     {
331         FileStream fs;
332         StreamWriter sw;
333         public BoilerInfoLogger(string filename)
334         {
335             fs = new FileStream(filename, FileMode.Append, FileAccess.Write);
336             sw = new StreamWriter(fs);
337         }
338         public void Logger(string info)
339         {
340             sw.WriteLine(info);
341         }
342         public void Close()
343         {
344             sw.Close();
345             fs.Close();
346         }
347     }
348 
349     //事件订阅器
350     public class RecordBoilerInfo
351     {
352         static void Logger(string info)
353         {
354             Console.WriteLine(info);
355         }
356         //Main code
357         static void Main(string[] args)
358         {
359             //location
360             BoilerInfoLogger filelog = new BoilerInfoLogger("e:\\boiler.txt");
361             DelegateBoilerEvent boilerEvent = new DelegateBoilerEvent();
362             boilerEvent.BoilerEventLog+=new DelegateBoilerEvent.BoilerLogHandler(Logger);
363             boilerEvent.BoilerEventLog+=new DelegateBoilerEvent.BoilerLogHandler(filelog.Logger);
364             boilerEvent.LogProgress();
365             Console.ReadLine();
366             filelog.Close();
367         }
368     }
369 }