vb.net软件破解码 vb.net软件下载
VB编写破解密码软件
写两个函数，一个检测是否有重复用户，第二个插入检测属用户是否存在private function checkUser(byval uname as string) as booleandim sql as string = ＂select * from [user] where username=＂ & unamedim cmd as sqlcommand = new sqlcommand(sql,conn)dim read as sqldatareader = cmd.excutereaderdim result as boolean = read.hasrowscmd=nothingreturn resultend function新增用户private sub adduser(byval uname as string,byval password as string)if checkUser(uname)messagebox.show（＂用户已存在＂）exit subend iftrydim sql as string = ＂insert into [user](username,password) values(@uname,@upass)＂dim cmd as sqlcommand = new sqlcommand(sql,conn)cmd.parameters.add(＂@uname＂,sqldbtype.varchar).value=unamecmd.parameters.add(＂@upass＂,sqldbtype.varchar).value=passwordcmd.ExecuteNonQuerycmd=nothingmessagebox.show（＂用户添加成功！＂）catch ex As Exceptionmessagebox.show（＂用户添加失败！＂ + ex.message）end tryend sub
【vb软件下载】VB.NET软件下载请问有VB.NET中文版的软件下载地址...
以修改“C:\ac.txt＂为at为例。
Pulic Class Fom1 Pivate Su Button1_Click(ByVal sende As System.Oject, ByVal e As System.EventAgs) Handles Button1.Click Dim Myfile As Sting Myfile = IO.Path.ChangeExtension(＂C:\ac.txt＂, ＂.at＂) Micosoft.VisualBasic.FileSystem.Rename(＂C:\ac.txt＂, Myfile) End Su End Class
【vb6.0】求VB6.0序列号
Public Function GBKDecode(ByVal sInput As String) As StringsInput = sInput.Replace(＂%＂, ＂＂)sInput = sInput.Replace(＂:＂, ＂＂)Dim ret_GBKDecode As String = ＂＂Dim sLen As Integer = sInput.LengthDim n As Integer = sLen \ 2Dim sBytes(0 To n - 1) As Byte"转化为字节码For i As Integer = 1 To nsBytes(i - 1) = CByte(＂&H＂ & sInput.Substring(2 * i - 2, 2))Next"将字节码转化为字符串ret_GBKDecode = System.Text.Encoding.UTF8.GetString(sBytes)Return ret_GBKDecodeEnd Function"上面是函数，调用方法MsgBox(GBKDecode(＂:%E9%80%81%E8%BE%BE%E6%97%A5%E6%9C%9F%20%E9%80%81%E8%BE%BE%E6%97%B6%E9%97%B4＂))
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