Check If String Contains Alphabet Characters?

Feb 14, 2012

Using visual basic, I have a string. Want to check that the string contains a single, capital alphabetic character followed by a period. Tried to use Contains as in the following:

someString.Contains("[A-Z].") but this didn't return me what I wanted.

Also need to check for a single number followed by a period.

How can I do this in Visual Basic

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Accept Only Alphabet And Numbers. No Special Characters?

Jun 2, 2011

how to validate a text box to accept only alphabets and numbers. no special characters. in vb.net i have tried the following code but it doesn't allow numbers but it allows alphabets only

Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
If (Microsoft.VisualBasic.Asc(e.KeyChar) < 65) _
Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 90) _
And (Microsoft.VisualBasic.Asc(e.KeyChar) < 97) _

[code]....

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Password Verifier - Six Characters With One Number / Alphabet

Mar 30, 2009

I did this for one of my homework assignments in C#. However I need to do this in Visual Basic. For VB it just needs to be 6 characters and have one numeric digit and at least one alphabetic character.

Private Sub btnVerify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnVerify.Click
public string getPassword()
End Sub
Private Function IsValid() As Boolean
[Code] .....

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VS 2005 Validation - Text Box To Filled By An Alphabet First Then The Remaining Characters Can Be Anything

Jun 7, 2012

I want my text box to filled by an alphabet first then the remaing characters can be anything. Also i have drop down which is having arithmatic functions.(< ,> , = ,+ etc) If the user selects < or > then the value entered in the text box should be numeric. and if the user selects "=" then the textbox value should be string.

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Check For Certain Characters In A String?

May 17, 2011

I am just a beginner in VB programming. What if I want to check if a certain subtext is present in a string? For example, what do I code if I want to check if the word "hello" is present in a particular string or not?

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User Enters A Password - Must Be At Least 3 Characters Long - At Least 1 Number And 1 Alphabet Character

Mar 28, 2012

My homework assignment is to create a project where a user enters a password that must be at least 3 characters long with at least 1 number and 1 alphabet character. After that the password has to be encrypted so that vowels become X, numbers Z, and it reverses. For example, a password of CS2301 would be ZZZZSC. There's supposed to be Loops to extract 1 number/letter at a time and search for them in the string to validate, and I don't know what to do. The form itself has a Text Box to enter a password and a label to display the new one, and a Go button.

This is what my code looks like so far.

Option Strict On
Option Explicit On

Public Class Form1

[CODE]...

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Check If A String Contains Characters Other Than Numeric?

Jul 7, 2009

is there a way to check if a string contains characters other than numeric? ive used isnumeric quite a bit and its pretty usefull, but cant find a way to check for text in a string. Having searched around theres a few ways of doing it slowly that ive found using an array of letters and a loop / instring, but thats much more hassle than checking for numbers, so strikes me there must be a way.

[Code]...

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Check For Character Number And Special Characters In A String?

Jan 21, 2011

I want to user to enter only numbers and characters in textbox i.e no special charaters.I don't want to use key press event of textbox.As i need same validation in gridview.

So i want to validate whole string.

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Check If The User Enter Alphabet In Textbox?

Sep 25, 2010

how to check if the user enter alphabet in textbox the only allow in that textbox is number

i think i will use ascii there like in vb 6.. but i dont know how to done in VB 2008..?

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C#-idiomatic Way To Convert A String Of Characters Into A String Of Hexadecimal Characters?

May 3, 2012

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?

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Remove All Special Characters(except - And /) From A String Including All Cr,lf,crlf, Other Illegal Characters?

Sep 13, 2010

i have been trying to remove special characters. i am not able to remove many crlf in middile of the string.

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Inputting A String Of Keyboard Characters And Outputting The Characters In Reverse?

Aug 3, 2009

I 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.

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Error When Getting A Substring Of X Characters Out Of A Parent String Of Less Than X Characters?

Feb 23, 2011

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')

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VS 2008 Check Text Box For Characters?

Jul 27, 2009

I want to check if text box has "?" character or specific numbers (ex "14"). How can I do that? It may have all kind of other letters too.

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Check For 3 Characters In Text Box, Pad Left With Zeros If Not Enough

Jul 14, 2009

Basically I need to make an if statement that checks the number of characters entered in a text box and pads left with 0's if there is not 3 characters entered.

Also, if letters are entered, I'd like it to produce an error message, or just not accept letters at all.

Is there someone who has done something similar in the past that might be able to help me format this textbox?

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Count Characters In A Masked Textbox For Check?

Jul 28, 2011

I am using a masked TextBox, and I would like to check the input (total characters must be 14),

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String Search - Parse The String Of Characters One At A Time

May 5, 2012

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?

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String Chopping - Print Just The First 3 Characters Of The String?

Jun 30, 2009

I have a string like 0010000.abc. Is it possible to print just the first 3 characters of the string i.e 001?ajaind

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Replace Characters In A String With Another String

Sep 23, 2011

I.E. replace "http:adf.ly/random"to "adf DOT ly /random"..Removes http: and changes . to DOT and adds spaces.

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String Inside 2 Characters Of String

Jan 19, 2010

I am trying to manipulate a string to get to a part of the string inside 2 specified characters. Getting anything inside the > and the space. string starting with: jk;fhdididlsls/"f>Dog (467838) fgdad

I am trying to get "Dog" out of this.

dim x as string
dim y as string
x="jk;fhdididlsls/"f>Dog (467838) fgdad"
y = x.Split(">" , " ")
MsgBox(y.Join(""))

It will somehow always error out: value of 1-dimension array of string cannot be converted to string

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Add 1 To First 3 Characters Of A String?

Nov 14, 2011

I have a barcode that once scanned returns a string 8 characters long.

Further along the program I have this line of [code]...

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Get First X Characters Of A String?

Mar 14, 2009

I want to be able to get the first x characters of a string

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.net - Rearrange Characters In A String?

Jun 27, 2011

I have a string like this:

1a2b3c4d5e6f7g8h

And I need to rearrange it as follow:

a1b2c3d4e5f6g7h8

Do you understand what I mean? For each two characters, the numerical character swapping place with the following letter, i.e. from 1a change it to a1.how to rearrange the numerical characters and letters in the string? My string always has the said pattern, i.e. one integer then followed by a letter then followed by a integer then followed by a letter and so on.

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Add Space After Every 4 Characters To String?

Nov 19, 2011

How can I add space after every 4 characters to string that returned from a function? I know the returned value it is 8 or 12 or ...etc.

for example function myString will return the value of ABCDEF12XY1Z

How can i display in textbox1 as ABCD EF12 XY1Z

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Adding Characters To A String

Apr 2, 2010

I have a string value (which is a hex value) that is displayed as so...F8 30 00 3D FC 13 F8 30 00 01 31 73 34 FE 34 DE F8 30 00 3D FC 13 F8 30 00 01 31 73 34 FE 34 DE F8 30 00 3D FC 13 F8 30 00 01 31 73 34 FE 34 DEThis continues on in this exact pattern. What I am trying to do is to get a " " inserted after the first 24 characters, and then after the next 24, delete a character and place an Enter or Return value. Then I would like another " " after the next 24, and then after 24 more, delete a character and place an Enter or Return value so on until the end of the string. The format would then look like this.[code]I know this is probably done with some type of array and loop, but I'm not even sure where to get started.

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Asp.net - Fix Special Characters In String?

Aug 3, 2010

I've got a program that in a nutshell reads values from a SQL database and writes them to a tab-delimited text file.The issue is that some of the values in the database have special characters (TM, dash, ellipsis, etc.) When written to the text file, the formatting is lost and they come across as junk "â„¢ or â€" etc"

When the value is viewed in the immediate window, before it is written to the txt file, everything looks fine. My guess is that this is an issue of encoding. But, I'm not real sure how to proceed, where to look, or what to look for.Is this ASCII or UTF-8? If it's one of those how do I correct it before it's written to the text file.Here's how I build the text file (where feedStr is a StringBuilder)

objReader = New StreamWriter(filePath)
objReader.Write(feedStr)
objReader.Close()

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Changing Characters In A String?

Mar 4, 2009

character manipulation in a String.

How do you change characters in a particular string and set them to a particular value.

For eg. I want to change the third character of the string "hello" to Y = > i get "heYlo".

I tried using the Chars function but it says that the function is read only.

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Copy Certain Characters From A String?

Sep 22, 2010

I am in a rather silly situation...suppose I have a text box in which I enter a line of text/characters/numbers...how would I be able to display the last two or first two (or may be middle two?) characters into another text box.

Example: I write "Hello World!" in the first text box and the program should display the first two characters from that text box, i.e. "he".

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Counting Characters In A String?

Feb 4, 2011

Ok, so I have a string called item. It's value is "Coffe`". When I try to get the number of caractors by using:

textcount = item.length

However it returns with the value "5". even though there is 6 caracters.

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Find Some Characters In A String?

Sep 16, 2008

I need to return everything between the 2 dashes:

"xxx-12345-xxx"

Here's my conditions:

Sometimes the middle part may contain more than 5 characters, so it could look like this: "xxx-12345AB-xxx" Sometimes there's no second dash, so a string could look like this: "xxx-12345"

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