Numeric Checker - Code To Validate Two Text Box Entries
Feb 1, 2010
I have the following bit of code to validate two text box entries, and it catches both text boxes individually just fine but my question is: Where would I put the code if the text box entries are both valid?
Dim intExponent, intBase As Integer
Dim ErrNum As Int16 = 1
If Not Integer.TryParse(txtExponentInput.Text, intExponent) _
[CODE]...
I tried a "Case 1" but apparently that doesn't work for some reason...
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Apr 29, 2010
i am use vb 2003 windows app with access 2003 database i want this code to check for numeric input only in the last text box CompanyProdPriceTxBx.Text
this is my
Private Sub SaveCompanyProdbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveCompanyProdbtn.Click
Dim rep As Integer
If CompanyProdNameTxBx.Text = "" Then
rep = MsgBox("Please Input Product Name", MsgBoxStyle.Critical)
[code]....
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May 11, 2009
Dense student here with little sleep here during finals week...I have a text field being read on a button click event (along with lots of other information being read). This field needs to have a number entered.
I either:
1) Force a default value (i.e. - "2")
2) Verify there's something in the field AND that something is numeric...
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Feb 20, 2009
I have two Numeric "spinner" boxes on my form called, nrcStartNumber and nrcEndNumber. The valid range for these boxes is 1-9999 (set for the controls at design). My question is what is the proper way to validate the two controls against each other such that the nrcEndNumber is always greater than nrcStartNumber? A similar question would be the same thing with two datetimepickers (formatted to time) such that the end time is always after the start time?
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Aug 31, 2010
it should take either decimal values or integers and max length is 16if it takes decimal value as input then it should contain only 14 digits in decimal place and 2 digits in fraction part eg(1234567.12-valid) but (12345678.123 - invalid) and also(123456.12345- invalid)
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Jun 7, 2012
The code below allows me to enter an integer in to the text boxes, but if I enter a decimal in any it throws an error. How do I validate decimal values in addition to integers?
Private Function numeric() As Boolean
'validate text boxes as numeric
Dim blnnumeric As Boolean = False
[Code]....
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Oct 21, 2010
this is my code in VB.NET 2008 and it works as the result, i can input starts from 1.00 until 99.99
but i need more than this i want the textbox automatic validate the input as i typed in the textbox
example: i typed "1000" then the textbox will write "1,000"
example: i typed "10000.99" then the textbox will write "10,000.99"
nb: it has to disabled from typing ","
[Code]...
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Jan 14, 2012
I'm trying to validate input boxes for numeric value and range value. If I validate for either numeric value OR range value there is no error (for example, comment out one of the validation statements), but if both statements are present and I enter "a" I get an error "Conversion from string "a" to type 'Double' is not valid." Can anyone tell me what I'm doing wrong?
[Code]...
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May 9, 2009
is there any function to validate if a string has only numerical characters? I can cross character for character and verify if it is a number. But I look for something simpler or if already a function like that exists.
I cannot use IsNumeric or IsDigit because it returns numbers to True with point or comma.
I need only numeric characters (no comma nor points
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Apr 10, 2009
Can someone tell me how to validate numeric, alphanumeric, currency, and 4-digit number in textboxes ?
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Apr 6, 2012
Is there a numeric text box, not an up-down box, a SIMPLE numeric box into which the user can place a number, 5 boxes actually, then on command have the five boxes added and the sum displayed?
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Aug 24, 2011
i found this small code through google, it works but i need it changing a littleVB CODE
Dim host As String
Dim port As Integer
host = TextBox1.Text
[code]....
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Jul 4, 2009
oes anyone know how to retrieve a list of backlinks to a website? I simply want to be able to get a list.
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Nov 29, 2009
I have a program where you have three entries, CD name, artist, price and it goes into a listbox and .txt file when closing. I have to have a message box if you enter the same CD name. I have a code to open the .txt file and compare strings but I need to change it to compare only the CD name and not all three entries. Is there a way to do my string compare against my listbox without opening the .txt file?? The program loads the listbox from the .txt file when opening. Private Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click' adds CD information to the list box
' declare variables
Dim strName As String
Dim strArtist As String
Dim strPrice As String
[code].....
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Jul 2, 2010
Been using C# and code snippets and fill 'em in and hit "Enter" and POOF there you go, all done.
So how the heck do I do this in VB? Example: "property" TAB TAB brings up the snippet. I fill it in just fine .. NOW WHAT? Hitting enter just give me a new line. ESC doesn't do anything. CTLR-K CTRLX doesn't either.
What's the secret? How do I get the snippet to accept my entries and unsnippetize itself into inserted code?
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Jun 22, 2010
I want to set a certain column to true or false automatically based on what value another column has entered. I managed to get this working by myself using the 'SQL Pane' in VB and testing it by using execute sql but I don't know what to do now. I assumed that I could just save it and it would work from there but that's not the case, it dissapears from the SQL Pane if I close the project (even though it worked fine when I ran the project the first time), so where do I put it/what do I do with it in order to get this to work?
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Dec 8, 2010
i m new to programming sector... i m creating a code to populate columner entries of a purchase / sales register. [code]
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May 17, 2012
how to make a form quicker to fill out for my work, and it involves having a employee enter a patient's name in one text box, and then having that information duplicated in all other name text boxes.
function FillName(f) {
{
f.FillNameBox1.value = f.wholename.value;
f.FillNameBox2.value = f.wholename.value;
}
}
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May 25, 2009
I'm building a small program and I have a numbers only textbox where its content need to be higher than 1. So what I have is a messagebox pop when the text change and its lower or equal to 0. What I'd like to do is have the text changed to what it was before the number was changed to <= 0.Here's what I have for the control:
Private Sub txtDelay_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtDelay.TextChanged
If txtDelay.Text <= "0" Then
MessageBox.Show("Delay must be atleast 1 millisecond.", "Delay Error")
End If
End Sub
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May 30, 2010
copy entries from the text box to a window behind the program?
[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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Mar 3, 2011
I made an application that writes to a text file in csv format, and on another tab, there is a listbox where the user can click the "View Report" button and it will display the information from the text file in a list box. Right now, I am really pleased with it because I was able to use "split" to get all of the separated values on there own individual lines.Now I am wondering, is there a way that I can display one entry at a time in the list box, and then maybe implement "previous entry" and "next entry" buttons so that the user doesn't have to scroll down through the entries to view them, they can just hit next entry and it will go to the next line in the csv text file and display the information from there? I have tried doing it a few different ways, here is what I have so far for the "View Current Report" button:
Private Sub btnViewCurrent_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnViewCurrent.Click
lblReport.Text = "Current Report"
[code].....
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Jan 16, 2012
Replacing text with AutoText entries in Word 2007 using VB.NET
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Dec 15, 2010
I'm making a part of my program that takes three inputs from the user and adds them then divides that number by three (the average of the three numbers). [code]...
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Mar 20, 2011
i need to build a regular expression to validate an code. The code has 10 charaters
- the First charaters can only one the following B,F,E,S,M,P,Z
- From Second to Seventh are alfanumeric (0-9 and A-Z)
- the Eighth is the letter U
- the ninth is a number (0-9)
-the tenth is alfanumeric (0-9 and A-Z)
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Dec 31, 2010
I am trying to implement the following code to validate several textboxes The problem i cant figure out is once i get in an offending textbox and input the data i cant get out of it? I know i am probaly missing something simple but I can't seem to find it
HTML
Private Sub tb_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles subj_ba_txt.Validating, subj_bed_txt.Validating, subj_dom_txt.Validating, subj_gla_txt.Validating
Dim errorMsg As String = "Missing Data"
[code]....
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Dec 8, 2011
am trying trying to write some code for a ComboBox that does the following:
1. Allow the user to enter text into the combo box to type entries contained in the list source.
2. Enable autocomplete to assist the user in selecting entries in the list source, both from dropped down state and non dropped down state.
3. Restrict the user from typing an entry that doesn't exist in the list source.
My requirements are:
1. The ComboBox must run some code after a selection has been made or the user has finished typing an entry (not after the focus has been moved to another control)
2. The code must only run once after the user has made a selection from the combobox or has finished typing an entry
The problem: To achieve the above functionality, I had to run code on numerous event's. Sureley there is a better way, here are the events and the reason for the code:
SelectedIndexChanged:This is the code that is run when the user makes a selection. No Mystery here
KeyDown:
Must Run
If e.KeyCode = Keys.Return Then
ComboBox1_SelectedIndexChanged(Nothing, Nothing)
End If
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Apr 26, 2012
I'm trying to figure out a way to validate the user data entered:
[Code]...
This is in MVC3, VB.net. I'm looking for an easy way to validate a users input data into the editorfor field.
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Sep 1, 2009
Im trying to code a program, that will only accept numeric values in a text box, and if you try to enter non-numeric values you get a message box that says "Please Enter Numeric Values Only." Is this possible?
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Aug 30, 2010
i want to validate many textboxes with same condition....Do i need to write code for each text boxes.
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