TextBox Validation - 16 Numeric Digits Entered Into The Masked Textbox
Nov 18, 2009
I 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)
OK, 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.
I have a function i'm using to validate some textboxes. However, the zip code masked textbox validation is not working. Zip code cannot be missing any of the first five digits (the last four digits are always optional). Here is the code that is not working. [code] Also, I have a menu item which when clicked will pop up a font dialog box. When i select a font, it is supposed to changed the font of every control on the form. However, it is not working. [code]
The user can only input today's date and tomorrow's date. How can I get it? Example valid dates are: Today's date: March 01, 2011 and tomorrow's date: March 02, 2011 if the dates are not valid then error.
Dim DD As String : Dim MM As String : Dim YYYY As String Dim DDMMYYY As String DD = Now.Day : MM = Now.Month : YYYY = Now.Year If DD.Length = 1 Then DD = 0 & DD If MM.Length = 1 Then MM = 0 & MM DDMMYYY = MM & "/" & DD & "/" & YYYY MskTxtBoxDate.Text = DDMMYYY
I am trying to setup an SSN Masked TextBox, the mask i selected for the field is 999-99-9999 When the field has no info the mask pattern shows in it, i would like to hide it and display it only upon info entry, meaning the user will enter the first 3 digits and then '-' will appear, will enter 2 more digits and then the second '-' will appear.
I simply want to have a user enter a number, e.g., 3.5, into a textbox and then click a button to process it. If nothing or a char or string is entered, I want to inform them to enter the number and clear the box. From a suggestion somewhere it was said to simply use validating. I thought e.handled was correct by that doesn't show up as an option. It works if the input is a number. If not, the messagebox shows and closes on OK but I can't do anything else. Any click (even to 'X' the window) anywhere brings up the messagebox. This is basically what I've tried:
Private Sub txtKidsAnswer_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtOddsAnswer.Validating If IsNumeric(txtKidsAnswer.Text)
I have the following validation which works fine for numeric textbox i.e., txtprojstart, however I want to update it for datetime textbox instead of numeric... See code below
I 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.
i wanna know about the main characters on Masked text box and meaning of them like CCCC, L, ?, 000, 999 and the second question is how i can use masked box to make user type a valid EMAIL.
I have many textboxes that I need to have display percentages. I have used a masked textbox extender and the percentages display fine. using 99.99% as a mask and number as the mask type.Now my problem is that i want it to be converted to a decimal when i save it to the database e.g 50% saves as 0.5 and then when it comes back from the database it must display as 50% again. This is needed for numerous calculations. IS there a way to do this?
I know the title spounds stupid. I will try to explain what I meen. I am trying to make a product key mask. for example: I was able to do this with the MaskTextBox but I want to seperate each line to there own text box For example: [Textbox1] - [Textbox2] - [Textbox3] - [Textbox4] - [Textbox5] I already limited the Textboxs to 5 characters. The problem I am having is, after I enter 5 characters in the first textbox, I cant get the cursor to auto tab to the next textbox. I have already tried fixing it with this code
The client can enter only four digits in the textbox wich represent the PIN (the text box is not allowed to enter more or less than four digits) . After the client entered four digits the textbox will be read only
My problem :When I put one digite then the text box becomes read-only, i want to enterd only 4 digite ..
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress If e.KeyChar Like "[0_9]" Or Asc(e.KeyChar) Like 8 Then
I found this code for making my textbox only accept numbers.
Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress Dim allowedChars As String = "0123456789"
[Code]....
But... the user can't delete the numbers using the backspace button. How do I do then?
Given a texbox, how can I completely ignore non-digit characters? So if I press "A" or "Z", those characters would never appear in the textbox. I'd like to run a bit of code if the user tries to input digits and if he tries to input non-digits too..
Given a texbox, how can I completely ignore non-digit characters? So if I press "A" or "Z", those characters would never appear in the textbox. I'd like to run a bit of code if the user tries to input digits and if he tries to input non-digits too
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Dim allowedChars As String = "0123456789$," If allowedChars.IndexOf(e.KeyChar) = -1 Then ' Invalid Character e.Handled = True
[code]....
this code accept only digits and its working like a charm but if i typed a wrong number its not allowing me to use the delete or the backspace on the keyboard?
How can I set the startposition of a maskedtextbox. When i click on a maskedtextbox i always want to start at the first position.In visual basic 6 i used the gotfocus with maskedtxtbox.selstart=0 But in visual studio 2008 this doesn't work.
i'm looking for a VB code to format integer into 5 digits and then after that auto increments like (00001 , 00002, 00003) And they are used in a text box field.
Scenario Example : When the user clicks on Add New Record. The empty id text box field will automatically insert a number 00001 on the textbox and if there user wants to add another record the number goes 00002 and so on.
Im trying to get my code to check that my textbox has 16 digits in it so that it can then validate the number entered. Here is the doe i have so far: [code]
i have several masked textbox connected to mysql database through a website i made, and what i'm trying to do is have these masked textbox automatically change the format what the user inputs to "hh:mm tt" so if the user inputs 6 or 600 or 6p it will automatically change it to the format to 6:00 PM.I know that i will have to use the Validated event and I've tried the Format(maskedtextbox1,"hh:mm tt") but can't seem to work. I would rather not use datetimepicker because i dont want the user have the option of using the dropdown.
How to make the a particular cell as Masked text Box of Data Grid's Cell? Need to restrict the user to enter only, like dd/mm/yyyy also with constrains with dd<31; mm<12; yyyy>1900 like Integer(Decimal) --> 25(0.001)
