VS 2005 - Looping Through TextBox Validate Handler?
Jul 30, 2009
Private Sub TextBoxHandlers()
For Each c As Control In Me.Controls
If TypeOf c Is TextBox Then
AddHandler c.DataBindings(0).Parse, AddressOf Textbox_Validate
End If
[Code] .....
I think I'm close but how do you get what the text box is bound to? I'm trying to loop through all my textboxes and add a handler that on validation will insert a null if it equals string.empty. How to set the property manager by sending it the appropriate Binding context. I know that this code will not find textboxes in panels or ones that are on other controls, that's fine, for now. I'm also not sure how it will handle controls that are bound to different datasets.
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Apr 12, 2012
Ok.. 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].....
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May 1, 2009
how i validate the textbox textbox only get integer value and after that this integer value assign to a integer variable.
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Mar 24, 2010
I 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]...
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Jan 15, 2012
how to validate the text box value? I have one class with function for validating the duplicate value of sql table.
[Code]...
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Apr 10, 2010
How could i validate a textbox in vb.net, so that it gives error message if i enter anything apart from alphabets?
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Aug 4, 2009
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim dt As New DataTable
Dim da As New SqlDataAdapter[code].....
i get values in textbox3 ......like 1,2,1,1,4 etc in each loop...but m not getting addition of those numbers...where m i wrong?
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Nov 22, 2010
I am making a project, a database project using vb.net 2005 at front end ans sql server 2005 at back end. i have to validate my form, like for sTUDENT ID, only numbers are acceptable. that what is the way to validate it? the way which i have used is
[Code]...
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Feb 13, 2009
excuse this thread if email ids doesn't exists other than in english language)before posting i have searched for the solution , but most of the solutions uses regular expression to validate the format of the email id.
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Mar 5, 2009
I 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.
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Jul 6, 2009
I 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.
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Apr 1, 2011
i 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.
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Aug 31, 2011
How to not accpet string in textbox only numbers will be validate..for the textbox contact no. and ge..
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Jun 12, 2011
Since 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.
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Sep 8, 2009
If the user enters non-numeric and numeric values in a textbox, how do I keep only the numeric part?
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May 4, 2012
how 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?
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Mar 11, 2010
VB .Net : how to validate textbox to get only alphabets a-z , A-Z..
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Mar 30, 2010
I 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].....
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Jun 18, 2009
Is 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 ( | )?
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Jun 24, 2010
I 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].....
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Oct 15, 2011
I have a form with 24 textboxes incremented by a letter. example: txtDimVala1.text, txtDimValb1.text, txtDimValc1.text, etc. I created a code to check each textbox, but there must me a more efficient way to loop it. I have tried a few loops but I cant get them to work looping through the different textbox values.
[Code]...
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Dec 18, 2009
How to validate the Date format "MM-yyyy" irrespective of the culture datetimeformat
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Dec 21, 2009
I want to handle the event "Smallincrement in vb.net 2005 " I am studying through the book BlackBook of VB.nET 2003.
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Feb 22, 2010
I'm making a rock paper scissors program and once I set the current_scene variable to 1, the MainLoop() sub doesn't keep looping, but the sub doesn't exit either. (Form1.vb is the most important file.)
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Jan 21, 2009
I have a datatable and I want to delete individual rows on the basis of a certain condition. How to do it in minimum lines of code possible?
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Mar 1, 2011
I started editing an existing code (basicaly to learn vb) without any real previous experience. Well let's get to the point;I have a form that gathers data from db ordering by user ID (on click count).I have one DataGridView with a list of user,some have data in db, some have not. I came so far that if I CLICK on a user that have data, all data is dissplayed in 6 dinamyc textboxes.If user has no data inly first (emty) row with 6 dinamyc textboxes is created.
BUT THE POINT IS (my question to you) - I have a button that simultaneously adds a row of dinamyc textboxes bellow and multiplyies textbox04 (name is clickcount & 4) and textbox05 and displays the result in textbox06.I want to add a messagebox that shows if textbox04 & 05 are empty and in that case exits sub. Here is my code so far:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Reset warnings[code].......
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Mar 20, 2009
I am using visual basic dotnet 2008 .I am in need of validating the controls in my forms. but the validation code should not be created for each form , so how to validate the textbox from a centralized code,
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Feb 16, 2011
I have set it up to email me should someone submit this form and an error occur and right now should that occur for most integer or datetime fields if they fail to validate then it will show me which fields in the email failed and what was input into them.
Problem I'm having now is to validate the drop downs and the textboxs in a similar way to what I with integer and datetime fields so I can display those also in the email in case they error.
present integer and datetime validation
[Code].....
Summary:- Need vb code to validate if strings and dropdowns are valid and the use of try/catch block is another possible solution but I wasn't able to figure out how to implement validation for that either.
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May 15, 2010
I want to validate a textbox.text value to a currency. For example if a user enters $154.45 i want the value to be 154.45 or if the enter USD154.40 I want that to be invalid. how can I do this? basically check that the input is all numbers.
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Feb 8, 2012
i am trying to validate a string that has been inputted into a text box so that it checks all of the characters in the text box individually. I have got the code to check the first character...
If Char.IsLetter(textbox1.Text) = False Then
MsgBox("Error! Invalide charecters present")
Exit Sub
End If If
I was just wondering if there is some sort of loop that i can do so that it checks all of the characters in the text box.
If Char.IsLetter(txtCustomerName.Text) = False Then
MsgBox("Error! Invalide charecters present in customers name")
Exit Sub
End If
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