Requirements:
enterprise has since adult products were not subject to usage time, or is restricted to the date coded inside the program, each time a new program and then compiled to the customer, is very convenient. So the enterprise to I wrote a module, the requirements are as usual:
1, regardless of which program at all times the call to the newly developed module can control the validity of
2, behind the expiration of the software we need to cater a valid registration code the software to continue using
3,
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4,
buy air max 90, if the access the registry is not allowed when the customers know the registry, modify the registry can persist to use the case of
5, the control ought not be also complicated
Analysis:
1, was my first repercussion was to dll, so I used the dll way to do.
2, this can be a RI .
3, I began to want to use the web time of authentication, but not necessarily the customer's computer web, it is not the way to use network time.
4, if the registry, reinstall the system or get other computer software, or can not control, so equitable do not have the registry.
5, the software traits that necessitate registration only need to reference dll and modify the Program.cs file as you can, simple ample, right RegDLL.RegClass reg = new RegDLL.RegClass ( System.IO.File.GetLastWriteTime (System.Reflection.Assembly.GetAssembly (typeof (Form1)). Location). ToShortDateString ()); if (reg.MiStart_Infos () & & reg.MiEnd_Infos ()) Application.EnableVisualStyles (); / / Application.SetCompatibleTextRenderingDefault (true); / / sentence to comment, as a program which can only occur word, dll which has been 1,
best amount mbt shoes 艺术家用四千颗糖果拼出英国地, so here to remark Application.Run (new Form1 ()); else Application.Exit ();
realize the idea:
actually quite simple, I use the software to log two files are the registered time (secret documents said below) and the breath of the time (mentioned below to the registration documents), these two documents you can use Notepad, document the needful coerce as a software file is missing, you can not run the software, of course, the file can be encrypted for more safe,
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dll module functions It��s about time:
one, check whether there is a secret file (Eng.k)
1. exists, read the ciphertext, the ciphertext is empty dates will be written to compile the program (phone this module the software the premier run needs to enrol once)
2. ciphertext is not blank then compared with the current computer time to validate the validity of computer period,
discount jordan shoes, the telling time of manuscript secluded documents ambition be microcomputer
3. This time the effectiveness of That time can not be fewer than the computer software registratiin due time, which made validation
Second, retard the registration documents the existence of (Engi.p)
1. exists, the software reads the ciphertext validity
2. If the ciphertext and the secret documents valid for space information is correct, the generated registration code, and write effective date
3. then likened the current date namely the appointment at which the 2 documents namely the software effectively, alternatively software The registration code namely ineffective, need to re-register a legal prerogative key
three, RI implementation
1. of way, is generated along to the date of registration code slightly
2. the registration code to the customer registration, as to if effective dll needs to be done is four friends
, this approach has a flaw,
alexander mcqueen shoes for sale, if the customer knows the principles of registration, clever and can crack, so surely can not say O (c_c) O ~
source
source code written is not enough to feel beauteous, I do not attempt here, but offer my dll files, RI, and sample projects download address: http://files.cnblogs.com/linyc/REGDLL.rar
Ps: want to discern the source code can decompile the software, peruse the source code that is secondhand to point Disclaimer: This software is merely as a communication technology use, no for mercantile intentions, as a outcome of valid issues arising from other responsibilities, I shall no be responsible.
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