c# 一个删除垃圾文件处理的类

1. usingSystem;
2. usingSystem.Runtime.InteropServices;
3. usingSystem.IO;
4. namespaceWinAssistant
5. {
6. //Classfordeletingtherubbish.
7. classDelRubbish
8. {
9. #region清空临时InternetCache
10. //ForPInvoke:ContainsinformationaboutanentryintheInternetcache
11. [StructLayout(LayoutKind.Explicit,Size=80)]
12. publicstructINTERNET_CACHE_ENTRY_INFOA
13. {
14. [FieldOffset(0)]
15. publicuintdwStructSize;
16. [FieldOffset(4)]
17. publicIntPtrlpszSourceUrlName;
18. [FieldOffset(8)]
19. publicIntPtrlpszLocalFileName;
20. [FieldOffset(12)]
21. publicuintCacheEntryType;
22. [FieldOffset(16)]
23. publicuintdwUseCount;
24. [FieldOffset(20)]
25. publicuintdwHitRate;
26. [FieldOffset(24)]
27. publicuintdwSizeLow;
28. [FieldOffset(28)]
29. publicuintdwSizeHigh;
30. [FieldOffset(32)]
31. publicFILETIMELastModifiedTime;
32. [FieldOffset(40)]
33. publicFILETIMEExpireTime;
34. [FieldOffset(48)]
35. publicFILETIMELastAccessTime;
36. [FieldOffset(56)]
37. publicFILETIMELastSyncTime;
38. [FieldOffset(64)]
39. publicIntPtrlpHeaderInfo;
40. [FieldOffset(68)]
41. publicuintdwHeaderInfoSize;
42. [FieldOffset(72)]
43. publicIntPtrlpszFileExtension;
44. [FieldOffset(76)]
45. publicuintdwReserved;
46. [FieldOffset(76)]
47. publicuintdwExemptDelta;
48. }
49. #regionDllimport
50. //ForPInvoke:InitiatestheenumerationofthecachegroupsintheInternetcache
51. [DllImport(@"wininet",
52. SetLastError=true,
53. CharSet=CharSet.Auto,
54. EntryPoint="FindFirstUrlCacheGroup",
55. CallingConvention=CallingConvention.StdCall)]
56. privatestaticexternIntPtrFindFirstUrlCacheGroup(
57. intdwFlags,
58. intdwFilter,
59. IntPtrlpSearchCondition,
60. intdwSearchCondition,
61. reflonglpGroupId,
62. IntPtrlpReserved);
64. //ForPInvoke:Retrievesthenextcachegroupinacachegroupenumeration
65. [DllImport(@"wininet",
66. SetLastError=true,
67. CharSet=CharSet.Auto,
68. EntryPoint="FindNextUrlCacheGroup",
69. CallingConvention=CallingConvention.StdCall)]
70. privatestaticexternboolFindNextUrlCacheGroup(
71. IntPtrhFind,
72. reflonglpGroupId,
73. IntPtrlpReserved);
75. //ForPInvoke:ReleasesthespecifiedGROUPIDandanyassociatedstateinthecacheindexfile
76. [DllImport(@"wininet",
77. SetLastError=true,
78. CharSet=CharSet.Auto,
79. EntryPoint="DeleteUrlCacheGroup",
80. CallingConvention=CallingConvention.StdCall)]
81. privatestaticexternboolDeleteUrlCacheGroup(
82. longGroupId,
83. intdwFlags,
84. IntPtrlpReserved);
86. //ForPInvoke:BeginstheenumerationoftheInternetcache
87. [DllImport(@"wininet",
88. SetLastError=true,
89. CharSet=CharSet.Auto,
90. EntryPoint="FindFirstUrlCacheEntryA",
91. CallingConvention=CallingConvention.StdCall)]
92. privatestaticexternIntPtrFindFirstUrlCacheEntry(
93. [MarshalAs(UnmanagedType.LPTStr)]stringlpszUrlSearchPattern,
94. IntPtrlpFirstCacheEntryInfo,
95. refintlpdwFirstCacheEntryInfoBufferSize);
97. //ForPInvoke:RetrievesthenextentryintheInternetcache
98. [DllImport(@"wininet",
99. SetLastError=true,
100. CharSet=CharSet.Auto,
101. EntryPoint="FindNextUrlCacheEntryA",
102. CallingConvention=CallingConvention.StdCall)]
103. privatestaticexternboolFindNextUrlCacheEntry(
104. IntPtrhFind,
105. IntPtrlpNextCacheEntryInfo,
106. refintlpdwNextCacheEntryInfoBufferSize);
108. //ForPInvoke:Removesthefilethatisassociatedwiththesourcenamefromthecache,ifthefileexists
109. [DllImport(@"wininet",
110. SetLastError=true,
111. CharSet=CharSet.Auto,
112. EntryPoint="DeleteUrlCacheEntryA",
113. CallingConvention=CallingConvention.StdCall)]
114. privatestaticexternboolDeleteUrlCacheEntry(
115. IntPtrlpszUrlName);
116. #endregionDllimport
118. #regionmethods
119. publicstaticvoidDeleteNetCache()
120. {
121. #regionvariables
122. //Indicatesthatallofthecachegroupsintheuser'ssystemshouldbeenumerated
123. constintCACHEGROUP_SEARCH_ALL=0x0;
124. //Indicatesthatallthecacheentriesthatareassociatedwiththecachegroup
125. //shouldbedeleted,unlesstheentrybelongstoanothercachegroup.
126. constintCACHEGROUP_FLAG_FLUSHURL_ONDELETE=0x2;
127. //Filenotfound.
128. constintERROR_FILE_NOT_FOUND=0x2;
129. //Nomoreitemshavebeenfound.
130. constintERROR_NO_MORE_ITEMS=259;
131. //PointertoaGROUPIDvariable
132. longgroupId=0;
134. //Localvariables
135. intcacheEntryInfoBufferSizeInitial=0;
136. intcacheEntryInfoBufferSize=0;
137. IntPtrcacheEntryInfoBuffer=IntPtr.Zero;
138. INTERNET_CACHE_ENTRY_INFOAinternetCacheEntry;
139. IntPtrenumHandle=IntPtr.Zero;
140. boolreturnValue=false;
141. #endregionvariables
142. //Deletethegroupsfirst.
143. //Groupsmaynotalwaysexistonthesystem.
144. //Formoreinformation,visitthefollowingMicrosoftWebsite:
145. //http://msdn.microsoft.com/library/?url=/workshop/networking/wininet/overview/cache.asp
146. //Bydefault,aURLdoesnotbelongtoanygroup.Therefore,thatcachemaybecome
147. //emptyevenwhentheCacheGroupAPIsarenotusedbecausetheexistingURLdoesnotbelongtoanygroup.
148. enumHandle=FindFirstUrlCacheGroup(0,CACHEGROUP_SEARCH_ALL,IntPtr.Zero,0,refgroupId,IntPtr.Zero);
149. //IftherearenoitemsintheCache,youarefinished.
150. if(enumHandle!=IntPtr.Zero&&ERROR_NO_MORE_ITEMS==Marshal.GetLastWin32Error())
151. return;
153. //LoopthroughCacheGroup,andthendeleteentries.
154. while(true)
155. {
156. //DeleteaparticularCacheGroup.
157. returnValue=DeleteUrlCacheGroup(groupId,CACHEGROUP_FLAG_FLUSHURL_ONDELETE,IntPtr.Zero);
158. if(!returnValue&&ERROR_FILE_NOT_FOUND==Marshal.GetLastWin32Error())
159. {
160. returnValue=FindNextUrlCacheGroup(enumHandle,refgroupId,IntPtr.Zero);
161. }
163. if(!returnValue&&(ERROR_NO_MORE_ITEMS==Marshal.GetLastWin32Error()||ERROR_FILE_NOT_FOUND==Marshal.GetLastWin32Error()))
164. break;
165. }
170. //StarttodeleteURLsthatdonotbelongtoanygroup.
171. enumHandle=FindFirstUrlCacheEntry(null,IntPtr.Zero,refcacheEntryInfoBufferSizeInitial);
172. if(enumHandle!=IntPtr.Zero&&ERROR_NO_MORE_ITEMS==Marshal.GetLastWin32Error())
173. return;
175. cacheEntryInfoBufferSize=cacheEntryInfoBufferSizeInitial;
176. cacheEntryInfoBuffer=Marshal.AllocHGlobal(cacheEntryInfoBufferSize);
177. enumHandle=FindFirstUrlCacheEntry(null,cacheEntryInfoBuffer,refcacheEntryInfoBufferSizeInitial);
179. while(true)
180. {
181. internetCacheEntry=(INTERNET_CACHE_ENTRY_INFOA)Marshal.PtrToStructure(cacheEntryInfoBuffer,typeof(INTERNET_CACHE_ENTRY_INFOA));
183. cacheEntryInfoBufferSizeInitial=cacheEntryInfoBufferSize;
184. returnValue=DeleteUrlCacheEntry(internetCacheEntry.lpszSourceUrlName);
185. if(!returnValue)
186. {
187. returnValue=FindNextUrlCacheEntry(enumHandle,cacheEntryInfoBuffer,refcacheEntryInfoBufferSizeInitial);
188. }
189. if(!returnValue&&ERROR_NO_MORE_ITEMS==Marshal.GetLastWin32Error())
190. {
191. break;
192. }
193. if(!returnValue&&cacheEntryInfoBufferSizeInitial>cacheEntryInfoBufferSize)
194. {
195. cacheEntryInfoBufferSize=cacheEntryInfoBufferSizeInitial;
196. cacheEntryInfoBuffer=Marshal.ReAllocHGlobal(cacheEntryInfoBuffer,(IntPtr)cacheEntryInfoBufferSize);
197. returnValue=FindNextUrlCacheEntry(enumHandle,cacheEntryInfoBuffer,refcacheEntryInfoBufferSizeInitial);
198. }
199. }
200. Marshal.FreeHGlobal(cacheEntryInfoBuffer);
201. }
202. #endregionmethods
203. #endregion清空临时Cache
205. #region清空回收站
206. [Flags()]
207. publicenumSHERB
208. {
209. SHERB_NOCONFIRMATION=0x00000001,
210. SHERB_NOPROGRESSUI=0x00000002,
211. SHERB_NOSOUND=0x00000004
212. }
214. [DllImport("shell32.dll",CharSet=CharSet.Auto)]
215. privatestaticexternuintSHEmptyRecycleBin(
216. IntPtrhwnd,
217. stringpszRootPath,
218. SHERBdwFlags);
220. publicstaticvoidDeleteRecycle()
221. {
222. SHEmptyRecycleBin(IntPtr.Zero,null,SHERB.SHERB_NOCONFIRMATION);
223. }
224. #endregion清空回收站
226. #region清空recent、temp文件夹
227. publicstaticvoidDeleteFile()
228. {
229. stringtemp=Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData).ToString().Replace("ApplicationData",null)+"Temp";
230. stringrecent=Environment.GetFolderPath(Environment.SpecialFolder.Recent).ToString();
231. CleanUp(temp);
232. CleanUp(recent);
234. }
235. privatestaticvoidCleanUp(stringdir)
236. {
237. foreach(stringdinDirectory.GetFileSystemEntries(dir))
238. {
239. try
240. {
241. if(File.Exists(d))
242. {
243. File.Delete(d);
244. }
245. else
246. {
247. //CleanUp(d);
248. Directory.Delete(d,true);
249. }
250. }
251. catch{}
252. }
253. }
254. #endregion清空recent、temp文件夹
256. }
257. }