private static void CleanDatabase(PrinterDatabaseEntities database)
{
foreach (var printer in database.Printers)
{
database.Printers.DeleteObject(printer);
}
database.SaveChanges();
}
private void BackgroundWorkerDoWork(object sender, DoWorkEventArgs e)
{
var bg = (BackgroundWorker) sender;
var database = new PrinterDatabaseEntities();
var arguments = e.Argument as object[];
var community = "";
var ipFrom = "";
var ipTo = "";
var scan = false;
if (arguments != null)
{
community = (string) arguments[0];
scan = (bool) arguments[1];
ipFrom = (string) arguments[2];
ipTo = (string) arguments[3];
}
var snmp = new SimpleSnmp("", community)
{
PeerPort = 161,
Timeout = 25,
MaxRepetitions = 20
};
if (scan)
{
#region
CleanDatabase(database);
var ipFromSplit = ipFrom.Split('.');
var ipToSplit = ipTo.Split('.');
var ipFromLastOctet = Convert.ToInt32(ipFromSplit[3]);
var ipToLastOctet = Convert.ToInt32(ipToSplit[3]);
var ipRestOctets = string.Format("{0}.{1}.{2}.", ipFromSplit[0], ipFromSplit[1], ipFromSplit[2]);
if (ipToLastOctet - ipFromLastOctet == 0)
bg.ReportProgress(0, 1);
else
bg.ReportProgress(0, ipToLastOctet - ipFromLastOctet + 1);
for (var i = ipFromLastOctet; i <= ipToLastOctet; i++)
{
var ipAddress = string.Format("{0}{1}", ipRestOctets, i);
snmp.PeerIP = IPAddress.Parse(string.Format("{0}{1}", ipRestOctets, i));
try
{
var printerFound = new Printer
{
ID = Guid.NewGuid(),
IpAddress = ipAddress,
LastStatus = GetPrinterStatus(snmp),
MacAddress = GetMac(ipAddress)
};
database.Printers.AddObject(printerFound);
}
// ReSharper disable EmptyGeneralCatchClause
catch{ }
// ReSharper restore EmptyGeneralCatchClause
bg.ReportProgress(0);
}
database.SaveChanges();
#endregion
}
else
{
#region
bg.ReportProgress(0, 1);
var tempPrintersList = new List<Printer>();
foreach (var printer in database.Printers)
{
snmp.PeerIP = IPAddress.Parse(printer.IpAddress);
tempPrintersList.Add(new Printer
{
ID = Guid.NewGuid(),
IpAddress = printer.IpAddress,
LastStatus = GetPrinterStatus(snmp),
MacAddress = GetMac(printer.IpAddress),
});
bg.ReportProgress(0);
}
//usuwanie z bazy
CleanDatabase(database);
//dodawanie do bazy
foreach (var printer in tempPrintersList)
{
database.Printers.AddObject(printer);
}
database.SaveChanges();
#endregion
}
}