i am trying to test if the characters in a string is a valid MAC Address
but my code
dim getMAC as string = "22:13:35:67:49:ab"
If Regex.IsMatch(getMAC, "/^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$") = True Then
messagebox.show("is valid")
[Code].....
Reverentjim kindly gave me this code the other day that worked well. There are two more things i am trying to do but cant get my head around it.
1) I want to be able to extract the text after the second and before the period e.g. profile
2) if exists, I want to change the text to lower after the period
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 RepliesI am getting following error when I am trying to use Convert.FromBase64String "The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters."
Dim payloadBytes = Convert.FromBase64String(payloadBase64)
Basically when my facebook registration form [URL]mphone field has a dash in it and encoded string is posted to other page and I am trying to decode it there which creates this error. Basically I am trying to extract data from Facebook Signed Request.
I don't understand the error, Argument not specified for parameter 'test' of 'Public Shared Function TestThis(test As String)'.
Partial Public Class Form1
Shared Sub ReceiveCallback(ByVal ar As IAsyncResult)
Form1.Invoke(TestThis, New Object(){"test"}) 'error
[code].....
I have a string of characters, but I would like to have a string of hexdecimal characters where the hexadecimal characters are converted by turning the original characters into integers and then those integers into hexadecimal characters. How do I do that?
View 3 RepliesI have a .Net 2 solution with some asp classic pages.I get a specified cast is not valid error when I access the page on my local. Below is the vb function where I get the Error:
Public Function Retrieve(ByVal vntSeqId As String, ByRef vntPart As String, ByRef vntPartKey As String, ByRef vntEntDate As String _
, ByRef vntStatus As String, ByRef vntOrigGblId As String, ByRef vntOrigNetId As String,
[code].....
MVC3, VB.NET, using EF. I am working on coding up a simple function to handle checking for a valid MySQL connection. If the connection fails the test it will use the secondary server connection. This is required because our hosting provider does not provide failover or redundant MySQL servers. The problem is I tried to use a simple try catch method in the HomeController. This fails early because the Entity Framework is looking the connection that was set up when I set it up... Is there anyway to control that connection dynamically?
View 1 RepliesI have this code that keeps giving me two problems.
first:The requested address is not valid in its context
second , it receives broadcast it sends, i dont want this. I want only the listeneing server app to receive the broadcast....the sending code
Dim sendMessage As New structMessage
sendMessage.Command = Command.IP
Dim byteData As Byte() = sendMessage.ToByte()[code]....
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 RepliesWhen i run my website in Visual Studio 2008 the address bar of explorer generates the following address
[URL]
The bold and underlined portion i-e (S(2vq3th45ep5kle5542jo4i45)) is generated from today and automatically. What is this showing? Is it a virus in my computer and will it destroy my application? It is making me tense as i am ne to ASP.NET and not in position to re-develop what i have mde up till now.
I get this error.. and I know the ip address is not valid duh! but it's a server it should be based on port only.
Error =
Errors at runProxy @ The requested address is not valid in its context
0.0.0.0:7900
[code]....
P.S.> my client I connect to 127.0.0.1 : 7900..I want it to re-route the connection to the txtIP.text : 7900 (txtListeningPort.Text)
i have been trying to remove special characters. i am not able to remove many crlf in middile of the string.
View 3 RepliesI need to create a console program that allows you to enter a string, of which is then outputted in reverse.
Sample:
Input: Diewas
Output: saweiD
Apparently I need to find out about strings and will also need to use a loop.
On my windows form i have textbox where the user will be entering XML data. What i want to be able to achieve is to search for a field called DESCRIPTION= and check that the text included contains certain characters?How can i get the tool to first find the DESCRIPTION= and test the characters contained with the " (quote marks)?
For example:
DESCRIPTION="hello & welcome"
I want my tool to look for certain characters like < > and & and when it finds one to have a error msg pop up and inform the user that the character will then be escaped for it's HTML entity, i.e & becomes &?
i am making internet search engine in vb 2010, i have textbox1 and button1,... i had to do webBrowser1.navigate("") but the problem is that i cant add "+" to it... cause we know that + is like &...... how can i override it???
also i want to launch it in default browser not webbrowser1 how can i do it??
The regex statement below is being used to valid user input for an IP Address.
I want to disallow the ability of a user to type in a domain name (can'tDoThis.com)
How would I change the following statement to NOT allow a user to type in alpha characters.
Dim ipPattern As String = "((2[0-4]d|25[0-5]|[01]?dd?).){3}(2[0-4]d|25[0-5]|[01]?dd?)"
Currently, 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.
Not sure if too many people know this, but the following line will cause an error:
GroupName.Substring(0, 3) = "jt_"
....if the length of GroupName is less than 3 characters. I always thought it would simply return whatever characters in GroupName, but no, it errors. I must be thinking of the old VB6 days.So, I now have to change the code to:
If (GroupName.Length > 2) Then
If (GroupName.Substring(0, 3) = "jt_") Then
Note that the two comparisons need to be on separate lines. If they are on the same line, such as:
If (GroupName.Length > 2) and (GroupName.Substring(0, 3) = "jt_") Then then the code will still fail as the length command is executed at the same time as the substring command- which will cause the error when the GroupName length is less than 3.Just thought that those of us not aware of this should be!
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('9844f9bfb55449e6a786fa62aaadfa20')
dp.SyntaxHighlighter.HighlightAll('f6d554fd98464bdba9159b319e51b381')
dp.SyntaxHighlighter.HighlightAll('93bf4ca63ad8447abdf084d8a9991e15')
"The requested address is not valid in its context."
[Code]...
We know that VB string start and end with double quotes " "
So we have to use "" if we want " in VB string.
I wonder if there is a regular expression pattern which will match VB string?.
I have written a program that uses an array of the english alphabet and Morse code. I also built a form with a input box for the alphabetic information and an output box with the Morse Code. What i am trying to do is basically type a word like "Hi" in the input box and produce the Morse Code equivalent in the Morse Code output box. [Code] This works but only one letter at a time. Do i need to Parse the string of characters one at a time, and then run it through a loop like i have created?
View 6 RepliesI am building an application to update a database.I have a Map table where row 0 holds the target table field name Row 1 holds an update value or Source table Column name Row 2 holds a Where condition eg
Map: CustNo CustName Val1 Val2
Update: 25
Where: =[CustNo] > [Fld14]
In this example I am going to update the Target Table Field 'Val1' to 25 where the Target Table Rows have Field 'Val1' data > 14 AND Target Table Field 'CustNo' = the Source Table Field 'CustNo' AND the Target Table Field 'Val1' > the Source Table Field 'Fld14' Where I am stuck is I at the moment is wondering how I should convert the strings into test conditions as I iterate the Target Table eg Say my test string is stTest and it holds " = 25" For each dr as datarow in dtTarget
some code
... stFld = "Val1"
if dr(stFld) { convert stTest into literal '=' and then 25}
... do something the only way I can think is to build up a series of test cases like:
Select stOp
Case stOp = "="
Case stOp = "<>"
etc.
I'm looking for some code in .net to allow me to test an xml file to determine if it is well-formed. I am not validating the file against a schema at this point in my code, just testing that it conforms to xml specification for being well formed.
View 1 RepliesFunction to test first char of string
View 9 RepliesIn a Select Case statement is there a way to test if an expression contains a part of a string? Something like this:
Select Case myString
Case "*abc*" 'any string that contains "abc" falls here
Case "*def*" 'etc
End Select
where i put the *'s i get the error "The parameter 'address' cannot be an empty string. Parameter name: address".
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
Dim mail As New MailMessage()
Dim SmtpServer As New SmtpClient
[code].....
I have a string like 0010000.abc. Is it possible to print just the first 3 characters of the string i.e 001?ajaind
View 1 RepliesI have two tables, dt & dtResults.dt contains 3 columns named: vchInstrumentAnalyteID, bintAnalyteCodeID, & vchAnalyteCode dtResults contains several columns including the columns in dt
I want to get vchInstrumentAnalyteID from the first row in dt and test if it exists in the vchInstrumentAnalyteID column in dtResults. If it exists, I want to use that value from dt to filter rows in dtResults and fill all the filtered rows with data from that row in dt. Then loop to the next row in dt.
I have this code, which is close to what I need, but I can't get it working.
' put analyte data in results table
For Each drA As DataRow In dt.Rows
If
[Code]....
I want to test whether the connection string is valid or not?What should I do ?
View 18 Replies