[Switch] use C # to obtain temporary ie files

Source: Internet
Author: User
Tags filetime

Http://www.chenjiliang.com/Article/View.aspx? ArticleID = 1621 & typeid = 84
As you know, when we visit a website. The system will cache all the images and animations on the website to the Temporary Internet folder. 
You can access <drives >:\ Documents and Settings \ <user> \ Local Settings \ Temporary Internet Files. However, we may not have imagined that the files in the folder are actually different from those in other folders and files in our system. 

For example, when we write a function under vs.net to return the folders and all files in the specified folder, but when we pass the address of the Temporary Internet folder into, the system will return only one file, that is, desktop. INI (each folder has), and there is a hidden folder. This proves that the files in the Temporary Folder do not exist in the normal folder and file mode. 

In fact, Windows stores all temporary files in a hidden folder, which we cannot see, and then reads and displays all the content back and forth to the user through an index. dat index. 

How can we use it?ProgramTo read the content? I have studied this because I have helped my students complete his graduation project over the past few days. 
First, you must reference a user. dll in the system folder. Then, you can use some of its functions to traverse the entire folder and obtain information about each file. 

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[Dllimport ( "Wininet. dll" , Setlasterror = True , Charset = charset. Auto)] Public   Static   Extern Intptr findfirsturlcacheentry ([financialas (unmanagedtype. lptstr)] String Lpszurlsearchpattern, intptr lpfirstcacheentryinfo,Ref   Int Lpdwfirstcacheentryinfobuffersize); [dllimport ( "Wininet. dll" , Setlasterror = True , Charset = charset. Auto)] Public   Static   Extern   Bool Findnexturlcacheentry (intptr henumhandle, intptr lpnextcacheentryinfo, Ref   Int Lpdwnextcacheentryinfobuffersize); [dllimport ( "Wininet. dll" )] Public   Static   Extern   Bool Findcloseurlcache (intptr henumhandle );

Introduce the above three functions to traverse the Temporary Folder and then reference Copy  Save

 
[Dllimport ("Kernel32.dll", Setlasterror =True, Charset = charset. Auto)]Public Static Extern IntFiletimetosystemtime (intptr lpfiletime, intptr lpsystemtime );

It is used to convert the filetime format to the string type in C # For further operations. 

The main program is as follows: Copy  Save

# Introduce DLL to Region [Structlayout (layoutkind. Sequential, charset = charset. Auto)] Public   Struct Internet_cache_entry_info { Public   Int Dwstructsize; Public Intptr lpszsourceurlname; Public Intptr lpszlocalfilename; Public   Int Cacheentrytype; Public   Int Dwusecount; Public   Int Dwhitrate; Public  Int Dwsizelow; Public   Int Dwsizehigh; Public Filetime lastmodifiedtime; Public Filetime expiretime; Public Filetime lastaccesstime; Public Filetime lastsynctime; Public Intptr lpheaderinfo; Public   Int Dwheaderinfosize; Public Intptr lpszfileextension; Public   Int Dwexemptdelta;} [structlayout (layoutkind. Sequential, charset = charset. Auto)] Public   Struct Systemtime { Public   Short Wyear; Public   Short Wmonth; Public   Short Wdayofweek; Public   Short Wday; Public   Short Whour; Public   Short Wminute; Public  Short Wsecond; Public   Short Wmilliseconds;} [dllimport ( "Kernel32.dll" , Setlasterror = True , Charset = charset. Auto)] Public   Static   Extern   Int Filetimetosystemtime (intptr lpfiletime, intptr lpsystemtime); [dllimport ( "Wininet. dll" , Setlasterror = True , Charset = charset. Auto)] Public   Static   Extern Intptr findfirsturlcacheentry ([financialas (unmanagedtype. lptstr)] String Lpszurlsearchpattern, intptr lpfirstcacheentryinfo, Ref   Int Lpdwfirstcacheentryinfobuffersize); [dllimport ( "Wininet. dll" , Setlasterror = True , Charset = charset. Auto)] Public   Static   Extern   Bool Findnexturlcacheentry (intptr henumhandle, intptr lpnextcacheentryinfo, Ref   Int Lpdwnextcacheentryinfobuffersize); [dllimport ( "Wininet. dll" )] Public   Static   Extern   Bool Findcloseurlcache (intptr henumhandle ); Const   Int Error _ no_more_items = 259; # Endregion  # Region filetimetosystemtime  Private   String Filetimetodatatime (filetime time) {intptr filetime = marshal. allochglobal (marshal. sizeof ( Typeof (Filetime); intptr policime = marshal. allochglobal (marshal. sizeof ( Typeof (Systemtime); marshal. structuretoptr (time, filetime, True ); Filetimetosystemtime (filetime, effecime); systemtime ST = (systemtime) Marshal. ptrtostructure (effecime, Typeof (Systemtime )); String Time = ST. wyear. tostring () + "." + St. wmonth. tostring () + "." + St. wday. tostring () + "." + St. whour. tostring () + "." + St. wminute. tostring () + "." + St. wsecond. tostring (); Return Time ;} # Endregion  # Region loading data  Private   Void Fileok_click (Object Sender, system. eventargs e ){ Int Nneeded = 0, nbufsize; intptr Buf; internet_cache_entry_info cacheitem; intptr henum; Bool R; findfirsturlcacheentry ( Null , Intptr. Zero, Ref Nneeded ); If (Marshal. getlastwin32error () = error_no_more_items) Return ; Nbufsize = nneeded; Buf = marshal. allochglobal (nbufsize); henum = findfirsturlcacheentry ( Null , Buf, Ref Nneeded ); While ( True ) {Cacheitem = (internet_cache_entry_info) Marshal. ptrtostructure (BUF, Typeof (Internet_cache_entry_info )); String Modifiedtime = filetimetodatatime (cacheitem. lastmodifiedtime ); String Expiretime = filetimetodatatime (cacheitem. expiretime ); String AccessTime = filetimetodatatime (cacheitem. lastaccesstime ); String Synctime = filetimetodatatime (cacheitem. lastsynctime ); # Region obtains data and stores it in the database          Try { // You can retrieve cacheitem here.              // Example              String S = marshal. ptrtostringauto (cacheitem. lpszsourceurlname );}Catch { // Handling } # Endregion  String S = marshal. ptrtostringauto (cacheitem. lpszsourceurlname); nneeded = nbufsize; r = findnexturlcacheentry (henum, Buf, Ref Nneeded ); If (! R & amp; marshal. getlastwin32error () = error_no_more_items) Break ; If (! R & nneeded> nbufsize) {nbufsize = nneeded; Buf = marshal. reallochglobal (BUF, (intptr) nbufsize); findnexturlcacheentry (henum, Buf, Ref Nneeded) ;}} MessageBox. Show ( "System data has been loaded! " ); Marshal. freehglobal (BUF );} # Endregion 

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