Validate Textbox For Letter Character Only?
Feb 25, 2009In vb2008 is possible validating textbox for letter character only?
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How To Validate Character Within Textbox
Jul 6, 2009I am trying to validate the character within a textbox. The textbox has a MaxLenght of 1
Private Sub textbox1_TextChanged() Handles textbox1.TextChanged
If allowed_characters.Contains(textbox1.Text) = True Then
textbox2.Focus()
End If
If allowed_characters.Contains(textbox1.Text) = False Then
textbox_userid_input01.Clear()
End If
End Sub
When I enter something in textbox1 at the debug it will do the if contain = false
but the if contain = true doesn't work. I tried a lot, but it still doesn't recognize true.
How To Validate Last Letter = Alphabet
Jun 22, 2010ow do i check for validation for my username field if last letter must be an alphabet?
the username is in the format of 7digit + alphabet i had successfully check for the first 7 digit using isnumeric substring 0,7 but i have no idea how to check my 8th letter to be alphabet a-z etc
Unicode Letter Or Character Frequency In Php Or .net?
Feb 11, 2011AM doing a letter frequency analyzer program just like this website[URL]... but i don't know the right algorithm. Of course simple looping should work if it where just english letters, but the trick is it should work with unicode letters like arabic ,chinese etc.
how do i do this? if i can get sample code in vb.net or php, or an algol,
Validate Format Of An 8-character String Value
Aug 2, 2010I would like to check the format of a string value (contained in a variable) before using it in further code.
- It must be 8 characters in length (no more, no less)
- It must be in the following format: 2 digits + 1 letter + 5 digits
I imagine the VB.NET code would be something along the lines of:If CStr(strMediaNum) (...not in the form [2 digits + 1 letter + 5 digits]...) Or (...datalength not equal to eight characters...) Then Exit Sub EndIf
Character Loop - Letter "l" Gets Read Out, Instead Of The Letter "ll"
Oct 19, 2010Basically, there are letters in welsh which act as one character e.g. "ch", "ng" and "ll". As you can see by the code, i am trying to do this with "ll" right now.
Dim s As String = Label5.Text 'easy enough to see what i did there.
Dim i As Integer = s.Length 'easy enough to see what i did there.
For i2 = 0 To i - 1 'declare the loop
[CODE]...
The problem is that the letter "l" gets read out, instead of the letter "ll". So theres my problem, what i need to do may seem simple to some, but i can't see how something like this would work.
VB - Express Calculator - When A Letter, Or Character, Is Entered - Label1 Display "invalid
Apr 23, 2009I've written up the following code (please note i only started to learn VB yesterday)
CODE:
And what I want it to do is when a letter, or character, is entered, i want to have Label1 display "invalid" but i cant seem to figure out how...
VS 2008 Function IsValid - Validate Some Criteria - Text Length Character Content
May 4, 2011I need to create a function named isValid to validate some criteria, text length character content. have validated length but i need to validate at least one Uppercase letter and one number is used(minimum) i was thinking of using a loop to check each character individually. thats probablly where i go wrong i, i often convolute the simple and keep heading of track.
View 3 RepliesHow To Check The Text In A Textbox, Character By Character
May 9, 2010My form has a texbox where user enters an ID. IDmust be4 chracters in length andof the form: begins with either "E" or "e" and the next 3 chracters cannot be "all characters".
Example:
E102 - corect
e3ff - correct
[code].....
Textbox - Every Time The Letter A Is Entered Into A Textbox - Want It To Enter In As A 1 Instead
Aug 27, 2010OK, every time the letter a is entered into a textbox, I want it to enter in as a 1 instead. Help?
View 3 RepliesDetect The Form Of A Letter "Character"?
Apr 12, 2011Almost each letter of my mother tongue (Arabic) has two or more forms to be written with, due to its position (At the beginning, middle or end of a word) and what are the two letters before and after it, however, I've been trying to figure why when I type something in a textbox and use the AscW method to get the character code, it returns a code for the same character but not of the same form, which means:
If I type a word starting with the letter above, the letter would be in the initial form (its Unicode is &HFED3 = 65235) , but when I use the AscW to get the code of the first character it returns the code (&H641 = 1601) of the same letter in actually none of the previous forms but apparently in the isolated form (&HFED1 = 65233).I've also tried to convert the default encoding to the Unicode's but had no accepted result and no solution through reading the two Unicode bytes (which had to be [211, 254]).
P.S. I tried something else:
TextBox1.Text = ChrW(&HFED3)
Msgbox(AscW(TextBox1.Text(0)))
to check if the problem is the AscW method, but it worked just fine, I have another idea running through my mind but I'm still not sure about it .So, is there any way to detect the actual form of a Unicode character?
How To Validate For Textbox
Apr 12, 2012Ok.. i'm trying to validate a textbox, and i think i got the code pinned down, however,after it is validated.. how do i loop so it lets you input the data in again after you have entered incorrect data
Do
NameNew = txtName.Text
If txtName.Text > 100 Then MsgBox("too high")
[code].....
How To Validate Textbox
May 1, 2009how i validate the textbox textbox only get integer value and after that this integer value assign to a integer variable.
View 12 RepliesHow To Validate Textbox In Wpf
Mar 24, 2010I want to write 123.32 i have implement validation but it does not include "."
how to include it
If (e.Key > Key.D0 And e.Key < Key.D9) Or _
(e.Key > Key.NumPad0 And e.Key < Key.NumPad9) _
Or e.Key = Key.Back Or e.Key = Key.Tab _
Or e.Key = Key.Decimal
[Code]...
How To Validate Textbox Value
Jan 15, 2012how to validate the text box value? I have one class with function for validating the duplicate value of sql table.
[Code]...
Validate A Textbox In .net?
Apr 10, 2010How could i validate a textbox in vb.net, so that it gives error message if i enter anything apart from alphabets?
View 3 RepliesCounting The Occurence Of Each Letter In A Textbox?
Dec 12, 2011FOR EXAMPLE I HAVE 2 TEXTBOXIN TEXTBOX1 I INPUT THE WORD "HELLO WORLD"THEN WHEN I CLICK BUTTON 1 THEN IT DISPLAY IN TEXTBOX2 LIKE THIS:1H 1E 3L 2O 1W 1R 1D 1R IT REVERSE AS H1 E1 L3 O2 W1 R1 T1AS LONG AS IT DISPLAY...
View 14 RepliesOne Letter Per Textbox And String Length?
Feb 26, 2010I have a program with 136 textboxes.
I want to be able to take a string that is entered into a textbox, and then put character 1 of the string in Textbox1, char 2 in TB2, char 3 in TB3, etc.
Also, how do I check the length of a string, like strlen in PHP?
Cannot Validate Textbox When Empty
Mar 5, 2009I have a form with a textbox, and i would like validation to occur so that a blank field is not allowed
e.Cancel = String.IsNullOrEmpty(TextBox.Text)
Does not always work, because it still allows me overwrite an existing field with blank spaces, and then update.
How To Validate Different Textbox Input
Apr 1, 2011i have this code:
If TextBox1.Text = "" Then
Label2.Text = " feild empty "
Elseif TextBox1.Text <> "1234" or "7463" or "3625" or "7642" Then
[Code].....
it works when its only only content "1234" but i need to place more than one possible valid input.
Not Validate A Char In Textbox?
Aug 31, 2011How to not accpet string in textbox only numbers will be validate..for the textbox contact no. and ge..
View 9 RepliesValidate A Textbox Content?
Jun 12, 2011Since my last thread hasn't been answered and I simply cannot wait until it gets answered, how can I validade what is being written on a textbox?
I need to know when the user types a "-" (minus) char. And when he do so, an message appears (preferably an ballon or a tooltip) and says that is illegal to type this char in particular.
Validate A Textbox To Only Contain Numbers?
Sep 8, 2009If the user enters non-numeric and numeric values in a textbox, how do I keep only the numeric part?
View 3 RepliesValidate Input In A Textbox?
May 4, 2012how one would go about validating input into a textbox for example:
Lets say the first letter the user enters has to be 'A' and the third letter the user enters has to be any number ranging from 0-9 and the length of their input cannot exceed lets say 10.
This is what I have so far:
If txtOperatorID.TextLength > 10 Then
bErrorOccured = True
sErrorMessage = sErrorMessage & "-No more than 10 chars" & vbCrLf
[Code]....
The coding for the length works(is there a better way to do this)? The coding for the first letter to be A works but then I have no idea how to set validation for any proceeding characters entered. Am i right in thinking I have to find their position somehow in the string if so how?
Validate Textbox To Get Only Alphabets A-z , A-Z?
Mar 11, 2010VB .Net : how to validate textbox to get only alphabets a-z , A-Z..
View 7 RepliesValidate That Textbox Is A Number?
Mar 30, 2010I need to validate that my textbox is a number. I found this example online, but it says that Type RegExp is not defined. How do I fix it?? Here is what I have:
Private Sub txtAnswer_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtAnswer.TextChanged
Dim myReg As RegExp
[Code].....
Validate The Value Entered Within A Textbox?
Jun 18, 2009Is it possible to validate the value entered within a textbox by comparing it with a text file that is full off accepted values?
in my textbox will be a location like London, i want to be able to validate that it is correct by looking in my text file to see if it is there?
my textfile would be written like this:
|london|manchester|birmingham|leeds|bristol| ... etc so it need to split the values by looknig with the pipe characters ( | )?
Way To Validate Textbox Values?
Jun 24, 2010I am trying to validate textbox values during runtime in vb.net I have following code which is validating txtno from database table tblmachines. But i have problem with chartype and stringtype. Is there any other solution to fix that problem?
Private Sub txtno_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtno.KeyPress
If e.KeyChar = Microsoft.VisualBasic.ChrW(Keys.Return) Then
[code].....
Convert Only First Letter Of Entered Name To Uppercase In Textbox
Feb 14, 2009How to take a name entered in a text box and convert only the first letter of each name to upper and then convert the rest to lower.
Ex: "john doe" --> "John Doe"
"jAkE sMiTh" --> "Jake Smith"
VS 2008 Upper-casing The First Letter In Textbox?
Feb 24, 2012uppercasing the first letter in a textbox?
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