VS 2008 How To Make Textbox Validation
Jan 7, 2011is there any way of making a textbox only accept intergers and treat them as such when doing calculations.
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VS 2008 - Textbox Validation For Numeric And Length (7 Characters)
Oct 20, 2009I validate TextBox for numeric and length no more then 7 characters. I'm checking for Not IsNumber and Len. But I want to give a user to save record when TextBox is blank.
View 12 RepliesTextbox Validation - 'REQUIRED" Property Or Control That Allow You To Make A Textbox A "required" Field?
Jul 18, 2011Does vb 2010 have a 'REQUIRED" property or control that allow you to make a textbox a "required" field? I googled and saw something about required property in controls in toolbox but somehow I could not find it anywhere in my vb 2010 toolbox. Would it be easier to write it? Does anyone have sample code?
View 6 Replies[2008] Error Validation - Series Of Nested If/then/else Statements To Make Sure A User Enters Information
Feb 15, 2009I'm using a series of nested if/then/else statements to make sure a user enters information into each text box or chooses a radio button. What would i use to say if no text is entered in textbox1, then ... also what would i use to make a sure the user choose one or the other radio button? for example i also have a combo box, i used "If SubjectComboBox.SelectedIndex <> -1" for the if statement.
View 2 RepliesTextBox Validation - 16 Numeric Digits Entered Into The Masked Textbox
Nov 18, 2009I am trying to mkae sure that there has been 16 numeric digits entered into the masked textbox. If not show errror message and if so to call the fucnction ValidateLuhn. When calling Validate Luhn i want the program to tell me if the number entered is valid or invalid using the code in the function:
Private Function ValidateLuhn(ByVal value As String) As Boolean
Dim CheckSum As Integer = 0
Dim DoubleFlag As Boolean = (value.Length Mod 2 = 0)
[CODE]...
VS 2008 Make A Textbox Change Some Letters Within Textbox When Click A Button
Jun 29, 2009I want to make a function in VB 2008 with which u can make a textbox change some letters within the textbox when u click a button. So example: Textbox1 has got in it: url...Then when I click button 1, it has to change ....
View 8 RepliesTextbox Validation In .net?
Dec 8, 2011I had used this code to validate email id in textbox,but it is not working properly?
Dim Expression As New System.Text.RegularExpressions.Regex("^[a-zA-Z][w.-]*[a-zA-Z0-9]@[a-zA-Z0-9][w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z]$")
If Expression.IsMatch(Textbox1.Text) Then
MsgBox("The email address is valid.")
Else
[code]....
Textbox Validation In VB?
Apr 3, 2011I have a textbox which has some text on it and when the user will click on it,The problem is, as there is already a text on the textbox when the user will click will diappear to type his respective text, the program is saving the text written also. How to prevent that? All I want is to prevent the program saving a blank textbox and the text written on it?
View 4 RepliesForms :: TextBox Validation?
Mar 16, 2010My question is the last code tag section above where the parameters are set for the input.If on the form there is a textbox that is required (on the db side to not allow nulls) how would you perform the validation before you tried to execute the update sql?Ex: say 'SerialNumberTextbox.Text' was empty or if you needed to have character constraints on what was typed like varchar(15) and they have 16 or more characters
View 7 RepliesMultiple Validation In .net Textbox?
Feb 1, 2012The problem i am having is after checking if the field is blank i want program to stop at that, right now it is going ahead and checking the username password also even though the field is blank and printing wrong username password. i am really new at this so please excuse the lack of knowledge
[Code]...
Textbox Email Validation?
Apr 12, 2012I copied someone elses code and then changed it to suit my program.. however even when a valid email is entered is still says invalid email entry
Private Sub EmailTextBox_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles EmailTextBox.Validating
Dim temp As String
[code].....
Validation For Blank Textbox : How To Do It
Jul 3, 2009read code below as soon as user lefts field blank he should get the mesage thats what i am creating but ofcorse this code creates a bug and i get that message once for first textbox then for second and this process continues till i stop the project app gets stucked between thease two textboxes?
Private
Sub fname_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles fname.LostFocus
If fname.Text = "" Then
[code]....
Validation On A TextBox In Silverlight End-to-end?
Sep 29, 2009I'm trying to add Validation to a Silverlight 3.0 TextBox but cannot seem to find and example which is complete, and not missing functionality that makes it work, I have this property[code]...
View 2 RepliesMake Data Validation?
Aug 11, 2010I have dragged across the details of a table from the data sources onto a form. So VS2008 automatically generate the BindingNavigator, DataAdapter,Dataset, ...etc. On the form I hv also placed an errorProvider and listbox, which is bound to the bindingsource. So as user clicks on the items of the listbox, the values of the textboxes changes accordingly. My question is how do I validate the values in the textboxes.
View 4 RepliesBasic Validation Of Data In A Textbox?
Feb 17, 2012I have to use basic methods to validate the data that's entered is acceptable. The chapter we are on only gets into checking if a value is =, >, < etc etc, but I want to check if a letter was entered where a number was expected, so I ended up
with this:
'Store user values
If Not IsNumeric(inputLoanAmount.Text) OrElse CDbl(inputLoanAmount.Text) < 0 _
OrElse Not Integer.TryParse(inputLoanTerm.Text, loanTerm) _[code]....
EMail Textbox Validation Not Working
Mar 26, 2010I want to validate email in text box through key press event.my code is as follows
[Code]....
it is not working, provide solutions....
Forms :: Validation Improvments(for Textbox)?
Mar 20, 2009on my form i have 2 text boxes. One email the other password. Her eis my code
Private Sub btnLog_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLog.Click
If String.IsNullOrEmpty(txtMail.Text) Then
'txtMail is empty
MessageBox.Show("Email is empty", "Error", MessageBoxButtons.OK, _
MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
[Code]...
How can i make this more efficient. So that txtMail checks for text first then @ then more text then .com or something? i,m sure you know what i mean.and textpassword is more then 2 or three chars?
Masked Textbox Date Validation ?
Dec 15, 2011How to enter the date in the masked text box and how to validate it
View 2 RepliesMasked Textbox Validation Of Phonenumber?
Jan 13, 2009OK, so i was going to verify a MaskedTextBox on whether the number input was or was not 10 digits in length. If not 10 digits, obviously they didn't put in a full phone number.
The problem is, even though you have no digits the length is still 10 so you can't check if the user put in 10 digits or not and return an error? Anyone got any ideas on testing for a phone number?I've seen tons of examples on date verification, but none on phone number verification.
Putting Textbox Validation In Function
Aug 1, 2010Is there any possibility that I can put this large chunk of code to a function so that I can call and verify the input without having to repeat the code for every textbox.keyPress event.
Here it is:
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
With e
If IsNumeric(.KeyChar) Or .KeyChar = "[" Or .KeyChar = "]" Or .KeyChar = ";" Or .KeyChar = ":" _
[Code] .....
Sql - VB ADO.NET Textbox Input Validation Against MSSQL DB
Jun 22, 2011I have one textbox basically the user is going to enter in a 9 digit number or letters. From there I want to have a buttonclick event that validates this against 2 columns in a MSSQL Database. First to check if the number exists, next to check if it is active or inactive.
There are about 27000 rows of numbers so my main question is what is the best approach to handling something like this.
Should I create a view and validate in the click event. Should I create a stored procedure in sql that takes an input parameter and call it in the click event.
I was also reading about storing the information in a dataset however with that many records i am assuming that is going to be a slow process.
Textbox Validation For Two Decimal Places?
Mar 2, 2010I need to amend the code below to cater for only two Decimal places. Anyone know how i can do this?
[Code]....
TextBox Validation On Generic Fields?
Feb 22, 2010First off, let me apologize for my wording. I'm a student programmer and code primarily in JAVA so my my lingo may be a little skewed.I have created a method to create text boxes in my program that all have the same properties (ie certain text, size, font, fore color, backcolor,etc.) that looks like this:
[Code]...
Triggering Textbox Validation On ENTER Key?
Sep 29, 2009I have a number of textboxes on a form, and I want them all to accept the ENTER key. When the ENTER key is pressed, I want it to trigger the validating event. I know it will look something like this:
Private Sub Textbox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Textbox1.KeyPress, Textbox2.Keypress
[Code].....
What code can I use to cause the validating event to fire? I'd prefer the focus to stay in the textbox.
Validation For Textbox - True / False?
Sep 12, 2011Can I validate a texbox to have only True or false? You should enter True or false in the textbox.
View 3 RepliesMake Image Combo Validation?
Jun 10, 2010I want to VALIDATE Image Combo control just like the one that is in CommonDialog control. Now I have to choices:1. Put validation routine in Click Event, it works fine if I only use mouse, but if I use keys (Arrorw, PgDn-PgUp, Home-End, etc) Click Event is invoked.2. Put validation routine in Validate Event, perfect; but I will work until when focus is moved to other control.How CommonDialog Image Combo does work? I can open it with mouse click or with F4, then I can move across options with mouse or keys and, when I click a choice or press Enter is when validate routine is invoked.
View 1 RepliesMake Validation Control To Only Allow Certain Characters?
Feb 22, 2010I'm trying to make a validation control that only allows (a-z, A-Z, and 0-9). Which control to i use in vb.net or do i have to write specific code to validate it?
View 3 RepliesAsp.net - Custom Validator Validation Not Firing For Textbox?
Jun 14, 2009I have created a custom validator for maximum characters for a multiline textbox in ASP.Net.Below is the code that I am using.
[Code]...
Asp.net - Stop The Inserting When The Validation Is Wrong For Textbox?
Nov 29, 2011i tried something like this, it insert into the database even thought nric is wrong. So i want it to stop inserting the data into the database when the nric validation is wrong, however from what i do, the result is it still insert the name in....so where should change to allow it stop inserting until user change the value then can continue insert???
Protected Sub btnSubmit_Click(sender As Object, e As EventArgs) Handles btnSubmit.Click
register()
End Sub
[Code]....
Combobox, Textbox , NumericUpDown And MaskTextBox Validation In VB?
Mar 27, 2011Combobox, Textbox , NumericUpDown and MaskTextBox validation in VB?
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