Communications :: Incrementing An IP Address?
Jul 11, 2011
I am trying to make a simple port scanner to scan a rang of IP's so like 192.168.4.245 to 192.168.5.100. I am using Visual Basic.Net 2010 and am having trouble converting the IP from a String to a Long so that I can increment it and convert it back to a String. For some reason VB.Net 2010 doesn't include the winsock controller and therefore I am having problems finding a method that works similar to inet_addr() which makes conversion much easier. I found an example on one of the forms here
Code:
Private Sub Command1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Command1.Click
[code]....
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Aug 5, 2009
Is there any easy way to determine the IP address for the computer that an app is running on. I looked through the System.Net namespace and didn't see anything of the sort.
Basically, I want to display the IP address to the user, instead of walking them through how to do an "ipconfig". They then can put that IP address into another app, so the one app can talk to the other via UDP.
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Jul 14, 2008
I'm running into a problem with this code:
[Code]...
The problem is that I'm running on Windows Vista and the above code seems to want to return the IP V6 information and not the V4 information. How can I force it to return the V4 information?
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Apr 12, 2010
I am trying to write a quick utility that will find out if a Windows XP computer is set to Static or DHCP and write a log file c:computername_static.log or c:computername_dhcp.log.
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Feb 6, 2009
I have a small embedded web server and to setup its network parameters I use a serial port, however this is giving me a lot of trouble due to USB to serial adapters (in some computers work in other doesn't).
However the other day I saw that Buffalo has a little program to find their NAS boxes (or network drives) when you don't know their IP address or got the wrong one so I assume they do it by looking for mac addresses.Is there any way of doing this with VB 2005 or higher? Basically I don't know the IP of the embedded server so I need to find it on a network, how do I find it?
a) I could do a general IP scan assuming it is on the same subnet than the host computer
b) if it has a different subnet... a general IP scan is not going to work, is it?
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Apr 8, 2010
[Code]...
Anyone know why, Every time I try calling something with this PhysicalAddress it says Null Exception, and the debug always displays nothing inside the Var's, Is this a bug or something? Im using Framework 2.0 >:O
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Apr 12, 2010
Is there a way to ping an IP address from VB.NET and store the response times?
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Mar 17, 2009
I whould like to find the IP address of a game server that sends UDP packets to my PC. Of this server I know the fixed Port number, but not the IP address
I can read the netstat -anp udp data and store them in a text file... but this command don't displais the IP Address and the Port number of the external servers, only lots of asterisks
the question is: how to retrieve this IP address?
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Jan 26, 2009
I am using VB2008 Express and am curious how to send a command via RS232 communications. The string that I need to send is 02h PON 03h. The start and end bits are 02h and 03h.
How can I convert 02h and 03h to its ascii form. In hyperterminal, I use the sequence {(hold)ALT 0 0 2} on the number pad to send the start bit.
I am using this code currently without the start and end bits
Code:
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Jun 7, 2011
Possible Duplicate: Way to get unique filename if specified filename already exists (.NET)Have a look at the following code:
Dim counter As Integer = 0
While System.IO.File.Exists("C:DesktopSample.xls")
counter = counter + 1
[code].....
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Jul 18, 2010
I'm trying to increase the value of a registry entry by 1
HKLMSoftwareMyApp
Key = Test
Value +1
[Code]....
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Jan 27, 2011
i'm doing this for auto incrementing i called the last value in a row from a database for say, its p-0004 what i wanna do is take p-0004 and add 1 into it to make it p-0005 sorry for my stupidity, i tried using the trim method i used in vb 6 but there was an error like "read only property" something
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Aug 16, 2011
i'm doing this for auto incrementingi called the last value in a row from a databasefor say, its p-0004what i wanna do is take p-0004 and add 1 into it to make it p-0005sorry for my stupidity, i know this is a noobie question but hey, i'm a noob
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Aug 5, 2011
What is the += used in this code doing? Is that incrementing the loop?
Public Class Form1
02
Public Structure Family
[CODE]..........................
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Feb 1, 2010
When you access a subroutine by one or more other subroutines each time the variables are zeroed like 'n' below. How can I keep n saved so main can increment n each time.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]....
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Jun 20, 2009
I've been looking into this problem for a few days now and i can't find exactly the code that i want.I want to run a procedure using an incrementing matrix. If the Matrix that was used is correct then the correct matrix is shown.
the process is get first iteration process if incorrect repeat with next iteration correct end the issue is with the iterations and breaking out of them the matrix length, depth and iteration step can vary.
this is best shown in an example
length = 5
high = 3
low = 0
step 1
the iterations should look like
[Code]...
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Feb 17, 2009
I have created a table with the following fields
loan_id (PK)
loan_date
loan_return_date
loan_user (FK)
i have set the loan_id column to increment in steps of 1, but when i add a column in visual studio 2008 express it auto increments in minus steps -1 -2 -3. it increments in positive numbers?
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Nov 15, 2011
I have some nested objects arranged like this:
Process
Persons
Workflows
Tasks
So you have one Process. Then multiple Persons can be added to and multiple WorkFlows can be added Process as well. Multiple Tasks can be added to each WorkFlow but I need a way to tie which Person is doing each task. I basically need a way that for each Person added to the Process it, in it's constructor, assigns a Person.ID property that can then be assigned into each Task's PersonID property...
Dim myProcess as New Process()
Dim myPerson as New Process.Person()
myProcess.AddPerson(myPerson)
[code]....
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Jun 21, 2010
I would like to know the coding behind incrementing a progress bar using a timer.
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Nov 18, 2010
i do have a table with 3 cols, 2 of those will visible for users to enter data, the last one is needed to get inserted as the next number of the previous number.
i use the following query for insert command ,
INSERT INTO [Headers]
(GrpId, GrpName, Number)
Select (Select Case when Max(GrpId) = Null then 1 else Max(GrpId)+ 1 end from [Headers]),
[Code]....
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Mar 10, 2009
I am doing a school project (in programming) on security, and i am focussing on MD5 hashing, this is a used way to store passwords, usernames etc. since i can't really be reversed..Now since i know that MD5 hashes are always 32 byte long there must be a limited number of different "hashes" even though 32 chars with 16 combinations each is a LOT of combos..Now, i will try to make a program where you put in a 32 byte hash and then, by using the principle above with limited hash amounts, try to find ANY string that matches the hash.I have already got code on how to create the MD5 hash but i need to know how to make the strings...it should hash:chr(1)chr(2)...chr(255)thenchr(1) & chr(1)[code]
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Apr 7, 2010
why my counter is not working properly. It starts by counting all of the files in a directory and everything is set to 0 initially at the start of the program. For some reason when I debug it in certain places the counter increments correctly but with no debugging and once it reaches my DoSql function the counter is not set to the correct number of files anymore.. Below is my code, filesRemaining should be initially set to the number of files then decrement everytime.. when I debug this method itself it works fine but say I put a debug point elsewhere or don't debug at all the counter is not right.
'Declare global variables
Dim fileNumber As Integer = 1
Dim arrayPosition As Integer = 0
Dim changeType As Integer = 0
[code]....
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Dec 1, 2009
[Code]...
I am trying to replace tasks.IndexOf(t) + 1 with something a little simpler. Is there any built in functionality for this? Hrmm xml literals do not seem to translate well on here....
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Sep 8, 2010
I have code that increments an array of numbers. However, due to performance issues, I need to optimize it.
Here is the code:
Public Sub increment(ByRef Index() As UInt16)
Dim N As Integer = Index.Length - 1
If (Index(0) = 65535) Then
Index(0) = 0
[Code] .....
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Jul 23, 2009
I'm trying to weave a .NET performance counter into an application. When I call the incrementBy(value) method on my avg performance counter it is changing the RawValue of my base counter by value as well. I checked the variable names and think everything is correct. Then when I call increment() on my base counter it adds 1 to the rawvalue of the avgcounter as well as incrementing the base counter... adding insult to injury!
In code I'm using two different counters to measure the time a merge sort I wrote takes. I have a instantaneous counter for the elapsed time of the sort and an average counter.
Dim timePiece As New Stopwatch()
timePiece.Start()
MergeSort()
timePiece.Stop()
[Code] .....
I think I may be using the counters wrong, but why does changing the rawvalue of the average seem to also change the rawvalue of the base? i dont think that's supposed to happen.
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Apr 25, 2012
I am coding an invoicing application. The user should be able to add a new line to the billing section of the invoice by selecting a product from a ComboBox, which subsequently fills out various other fields (price, description, etc) based on the selected product.
My problem is this: When the user adds a product, I would like the program to automatically generate a new line for the next product. It seems like the only way to accomplish this would be to create a new set of controls with an incremented name, i.e. Product1, Price1, Desc1 for the first product, Product2, Price2, Desc2 for the second product, etc. Is this possible, or am I going about it all wrong?
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Jul 6, 2011
Are there any IP Address filters or masks available in Windows Forms as per following screenshot? A backslash shouldn't be allowed or it should be filtered somehow.
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Aug 11, 2009
SocketException was Unhandled: Only one usage of each socket address (protocol/network address/port) is normally permitted I get this error every time i click collect a second time.
[Code]...
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Mar 30, 2009
I have a legacy data table in SQL Server 2005 that has a PK with no identity/autoincrement and no power to implement one. As a result, I am forced to create new records in ASP.NET manually via the ole "SELECT MAX(id) + 1 FROM table"-before-insert technique.Obviously this creates a race condition on the ID in the event of simultaneous inserts.
What's the best way to gracefully resolve the event of a race collision? I'm looking for VB.NET or C# code ideas along the lines of detecting a collision and then re-attempting the failed insert by getting yet another max(id) + 1. Can this be done?
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May 7, 2012
I have a piece of JQuery AJAX that calls a VB.NET code-behind (class) that returns string data. It grabs some latest stats on a particular server. Now the code works, but the first time I press the refresh button data is returned and the alert "Refreshed" is shown on screen.
But if I press it again, the alert box "Refreshed" is shown twice, I click again three times! and on and on, until the time-out kicks in.It seems to be coming from the AJAX call and no where else. I'm at a loss at what could be calling this, I've tried deleting the data returned after success but no joy.
function RefreshServer(btn,div,id,ip) {
$('#aRefresh'+id).html("<img src=images/refreshServer.gif border=0 align=absmiddle />");
$("#"+btn).click(function() {
$.ajax({
[code]....
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