public MainWindow()
{ InitializeComponent();
Title = getUUID();
string s= httpGet("http://220.181.57.216/");
//MessageBox.Show(s);
MessageBox.Show( CheckSum("2019-9-10"));
string sEncode=encode("0;2018-12-30");
string sDecode=decode(sEncode );
Title = sEncode +"-------"+ sDecode ; } int tabIndex = 0; string getUUID()
{
string code = null;
SelectQuery query = new SelectQuery("select * from Win32_ComputerSystemProduct");
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(query))
{ // MessageBox.Show(searcher.Get().Count.ToString());
foreach (var item in searcher.Get() )
{
using (item) code = item["UUID"].ToString(); }
}
return code; } public static string encode(string str)
{
string htext = ""; for (int i = 0; i < str.Length; i++)
{
htext = htext + (char)(str[i] + 22 );
}
return htext;
} public static string decode(string str)
{
string dtext = ""; for (int i = 0; i < str.Length; i++)
{
dtext = dtext + (char)(str[i] - 22 );
}
return dtext;
} private static string CheckSum(string message)
{
char[] chars = message.ToCharArray();
int checksum = 0;
for (int i = 0; i < chars.Length; i++)
{
checksum += (int)chars[i];
}
// checksum = (~checksum & 0xFFFF) + 0x0001;
//return Convert.ToString(checksum, 16).ToUpper();
return Convert.ToString(checksum, 10).ToUpper().PadLeft(5,'0');
}