Is there a way to check if an IP address is within a certain range without having to iterate through a huge range of IP addresses?
For example, check if 10.1.2.3 is between 10.0.1.1 and 10.9.255.255.
I could also do with this working for IPv6 for futureproof my code.
dynamically get the range of cells in Excel using VS 2005 vb.net. This works oRange = oSheet.Range(oSheet.Cells("A1"), ("U281")).Select, but "U281" will not always be the last cell in the range. So how would I dynamically get the last cell with data in it with the same format as U281.
View 2 Repliessearching through memory at a given address range, and match a string of bytes specified i.e.
FindArrayOfBytes(Byval str as String, Byval range_start As Integer, Byval range_end as Integer) As Integer
The function should return the address start of where the array of bytes was found.
With an excel file opened, i'm trying to:
Select a Range of Non-Contiguous Cells within a Column, then return the address of the last active cell.
Below, is what I have so far: Note the section maked:
' I can't get the next bit to work: '
To make it work, so far :(
1. Create a new Project using VS-2010.
2. By default, the form should be displayed as "Form1.vb".
3. Add a Label (No need to name or set anything).
4. Add two buttons (Again, No need to name or set anything).
5. Double click on the Form...
6. With the form code displayed, Select all, then paste the following.
'Option Strict Off
'Option Explicit On
Imports System.IO
[Code].....
In member register page, I added email address validation but it only check the email address format, such as .com, .net, .org.If user inputs fake account such as aaabbb01010@gmail.com, how to verify it and return an error?
View 2 RepliesOn my form i have a textbox that users can enter a value into, how to i check whether the value entered in the textbox is within the range bewteen two other numbers?
i.e
Top int is 10
Bottom int is 5
The user enters 7 into the textbox
I want to check that the value entered is within the top and bottom range, and in this case as the number 7 is between 5 and 10 the answer would be yes?
If the user had entered 3 for example, then the answer would be no.
The Top and Bottom Int's will be set at runtime by the value entered into another textbox so will differ each time the user uses the form.
I implmented a function to check time range in vb.net. But it is giving me wrong output. My starttime is everyday at 11.00 Pm and end Time is 5.00 AM. My function if i pass 1.10 AM does not return me true output as this falls under that time range.
Private Function CheckTimeRange() As Boolean
Dim retValue As Boolean = True
Try
[Code]....
I need to take six altitudes altitude1 and altitude2 and check to see if they are with in a value of 250 of each other. Then if there are any that are within 250 of each other, to make them turn red.
Second thing is:
I need to take 6 altitudes, and arrange them. I have them in panels and I have 6 empty panels as place holders for .location value however I need to know how to look at 6 values and say arrange these values accordingly highest number this place lowest number this place etc.
I have looked everywhere on the internet and maybe im just retarded when it comes to math in vb.net.
I've been looking around, but just can't seem to find any code that checks if a certain wireless network (with an SSID of "HomeWifi," for example) is in range of the computer.
View 1 RepliesI have two user inputs (as textboxes) for two numbers I'm looking to check for all the prime numbers with the range of those two numbers and display them within a multiline textbox, however my code returns nothing but zeros, and I have seen easier ways to do it without functions but I am curious as to how to go about calculating primes within the function.[code]...
View 7 RepliesI want to know how many cell a namedRange contains . or want to check either a named range contains a single cell or multiple cells.
View 2 Repliesi need to check whether a demical is 0 through 49.99 or 50 through 99.99 or 100 through 199.99 or greater than 200. i am trying to do this with select case, but i am not sure of the syntax.
View 7 RepliesI need to figure out whether a certain date falls within a range of dates. For example the date 11/07/97 (MM/DD/YYYY) falls within the following range of dates formatted as shown below:
01-Apr and 31-May
01-Jun and 31-Oct
01-Nov and 31-Mar
I would like to see program in Visual basic of how to validate existence of eMail address
View 2 RepliesI have an application which need to send data to particular system on specific port. But the application gets hang if the target system port is closed.
I Want to know if a particular Port is open on a specific IP address so that i can continue my next task. PBL (Visual Studio 2010 Ultimate)
I am developing client application I store client details with e-mail address. but I give permission to users to entry valid e-mail address of every client, In that case I will check valid e-mail address for that how to check the given valid e-mail address
View 2 Repliesis there any way to check if an email is active without sending it an email? (meaning that it does not get returned) if i have 20,000 emails in my email list, and i do decide to send all of them an email, how can automatically cross out the email address that got returned?
View 7 RepliesHow to write a if else statement to check if the number user enter follow within a range.
View 5 RepliesHow I do set the webbrowser object to check the link address I have clicked and if the link is within the host I approved?
View 2 RepliesCurrently, to avoid errors from being thrown up due to invalid email addresses, I do the following:
Dim mailAddress As MailAddress
Try
mailAddress = New MailAddress("testing@invalid@email.com")
Catch ex As Exception
'Invalid email
End Try
However, rather than depending on Try..Catch, is there a way of validating that the email address will be 100% valid for the MailAddress type?I know there a plenty of regex functions out there for validating emails, but I'm looking for the function which the MailAddress type uses to validate its addresses.
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.
View 1 RepliesSocketException 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]...
Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
View 3 RepliesI am using the following code in the Load method of a VB form to generate random numbers in the range 1 to 8. Without fail after enough loops the range is exceeded and 9 is the random number returned every time. The line using the Rnd function is from: Rnd Function (Visual Basic)
[Code]...
I made web browser which consist address bar that I use it to type addressess in it i.ewhen I type [URL] it opens [URL] but when I go to anther page in google it doesnot show it's link in address bar lix InterntExplorer or other international browsers so how to show any link or any sub page's link in my browser address bar ?
View 1 RepliesI'm trying to use the DHCP API (using the references on pinvoke.net) to retrieve a computer's MAC address when given the IP address but I can't get the code to work. I've run all the C# code on pinvoke.net through the C#-to-VB converter but I'm stuck now.
Here's what I have so far. The value of res is always 5 (should be 0). Thing is, I can't find any documentation on what the return codes mean
vb
Private Sub GetMACDim client As String = "1.1.1.1" Dim server As String = "0.0.0.0" Dim si As New NativeMethods.DHCP_SEARCH_INFO si.SearchType = NativeMethods.DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress si.ClientIpAddress = Convert.ToUInt32(StringIPAddressToUint32(client)) Dim res As UInteger Dim oInfo As IntPtr
[code]....
' Use Your work Group WinNT://&&&&(Work Group Name) Dim DomainEntry As New DirectoryEntry("WinNT://Wokgroup") DomainEntry.Children.SchemaFilte
[code].....
I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
I'm using vb in excel 2007 and need to work through a range or array, the size of which varies from time to time.
The examples of using range always demonstrate using literals eg "A1:A25"
How can I programatically determine the end of the range - ie up to where the cells value is blank
And then can I use a variable in the range statement - eg .[A1:Lastcell]
how to assign a static ip address and dns adress by VB2008?
I search in MSDN,use system.net.ipaddress??or something else?