How To Enter Number In Textbox Class
Mar 31, 2011
With this code, I am trying to enter a number in TxtBox Class A, B, and C. When I place a number in either text box, it will multiply the following text boxes by either 15, 21, and 9, add the total and place it in the the total text box. When I run the code I get this error message "Conversion from string "" to type 'Decimal' is not valid."
Dim decClassA As Decimal
Dim decClassB As Decimal
Dim decClassC As Decimal
Dim decClassAR As Decimal
Dim decClassBR As Decimal
[Code] .....
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Nov 30, 2010
It seems like I'm only able to enter a certain number of chars into a textbox.Like if I have a list from 1 to 10000.When I paste it in a textbox it ends like this:
5639
5640
5641
[code]....
Why cant I add everything to the textbox?
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Nov 22, 2010
I am doing a program for travel reservation and need to know how to let the customer enter their passport number into a textbox. Its is 8 characters long and the first 7 characters are numbers and the 8th is a letter.
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Oct 15, 2011
how can i limit a user to enter 10 digit no like telephone no in textbox without using regular expressions?
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Oct 9, 2011
how can i limit a user to enter just 10 digit number (minimum 8 but not more than that 10 in any case) in a textbox(like telephone no)?
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Jun 21, 2010
i want to know how to assign specific number of digits enter in a textbox..
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Mar 21, 2011
I have two masked text boxes that holds Phone Numbers and Zip Codes.Since they are Masked text boxes and are set not to allow characters or letters, the user must enter numbers.However, how do I add a message telling the user to enter number and zip code since there is no prompt?I don't need to validate the numbers just to add an error message if it's left empty.
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Jan 28, 2012
Assuming that I have a Windows Forms textbox and want to reduce the maximum amount of characters that can be allowed in via user entry, how would I do that?
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Oct 26, 2010
I have a customer form and want the customer to enter a passport number into the textbox and want to limit them to enter only 7 numbers and a letter.
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Jun 22, 2010
This is a Library code I got from Microsoft for format a textbox into a numeric format...but it's doesn't works because error message "numberFormatInfo is not defined".
Public Class NumericTextBox
Inherits TextBox
Private SpaceOK As Boolean = False
' Restricts the entry of characters to digits (including hex),
' the negative sign, the e decimal point, and editing keystrokes (backspace).
[Code] .....
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Aug 29, 2010
how to enter a data that i enter in textbox to a datagridview... for example i enter in the textbox is round and when i click add it will go to database... im using ms access database
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Oct 4, 2009
I am supposed to create a program in my VB.net class to do the following:
1. Prompt the user to enter the beginning number and the ending number.
2. Find the sum of the even numbers between these two values, inclusive.
[Code]...
We are currently using for next statements in the class. I know how to prompt for and utilize the numbers that are input etc. My problem is the EVEN numbers part. I obviously have to determine if the number is even and then use a step value of 2 from there. But not sure how to determine if number is even or odd (guessing to use mod, but totally lost).
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Mar 2, 2011
I am wounder if anyone might have a web site or no where I can find the information so I understand how to prompt the user to enter the beginning number and the ending number. And then to find the sum of the even number. Now does anyone know what a name convention is ? I have tried to look it up on the forums but cant find nothing on it.
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Dec 13, 2011
how can I detect if press Enter in the Textbox Change event and not in Textbox Keypress?
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Aug 27, 2010
OK, every time the letter a is entered into a textbox, I want it to enter in as a 1 instead. Help?
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Oct 11, 2009
Heres my code for my button:
Private Sub btnTotavrg_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTotavrg.Click
'Calculate the average and total of the entered marks
Dim num1 As Integer
Dim num2 As Integer
[code]....
How do I make it that when a user dosent enter a number between 1 and 100 in the textboxes; an OK messagebox comes up telling them to?
1. I want to have the messagebox come up after the button is clicked and not under a leave event.
2. And its also important to make sure that if any non-number is entered; it wont crash.
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Sep 26, 2009
How do I make it that the user must enter a number between 1 and 100? And If they dont they get an OK messagebox stating that they must do.I imagine it'll be something like this:
If TextBox1.Text = "" Then
MessageBox.Show("You must enter a value between 1 and 100", "Name Entry Error", _
MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
End If
But Im not sure whats suppose to go inbetween the speech marks.
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Nov 16, 2011
Basicly my instructor said that we have to make a program that will count how many times we enter a number into an inputbox, he also said we had to use a while loop. [code]
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Feb 7, 2009
I am trying to release my program now and I have a quick (hopefully quick) question concerning serial numbers. I want to be able to store the trial serial number so if the user uninstalls and reinstalls they won't get another evaluation period free of charge. My concern is that some crafty person will simply move the database files in and out of those installs and keep going indefinately. Although I have some protections built into the database itself in case the program runs out, I just want one extra layer of protection. Is there a way to store the serial number in the registry when entered and check for that entry whenever the program is installed using Windows Installer 3.1?
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Jan 27, 2012
I want to be able to enter (type in) data into a combobox as well as picking from the list. In earlier VB there was AfterUpdate event so that I could enter in the data I wanted. Now I have tried Keypress, Enter, and others and they all want just one character or number. If I try to enter a two-digit number it doesn't wait.
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Jan 1, 2011
So I would like an email program that within the code already has the from email adress, gmail. I would like it to let you enter the number of emails to send to the address that you enter, not the one in the code. Also I would like it to be able to enter the message.
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Apr 28, 2012
So I wanted to make a program for math where you enter a number into a box. Then you click enter. The program has numbers 1-12 next to a check box. If you click enter it divides your number by the numbers 1-12. Let's say you put 100 in that box. Then you clicked enter. The check box next to ten would be checked, 4, 2, and 5 would all be checked because those numbers evenly go into 100. How can I have the vb check to see if the sum is a whole number?
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Mar 12, 2012
If IsNumeric(Hundreds.Text) Then
HundredsTotal.Text = (CDec(Hundreds.Text) * 100).ToString("##,##0.00")
DollarAmtVar = CDec(HundredsTotal.Text)
[CODE]..
The above code is from a small program I have written. This test is done on about 30 textboxes I am using for the user to enter number.
The following is the sub routine that is called.
Sub ShowError()
MessageBox.Show(BoxName & " must be a number.")
End Sub
Here is what I want to do but it won't work.
BoxName.Select()
This is so I can put the focus on the different boxes that might contain an error.
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Jul 15, 2009
In my datagriedview i have 5 column called T,C,F,S and H.I want to specify in column C that the user must enter 3 digit. For column H the maximun value should be 2000 so user should not enter more than 2000.how i can specify this condition for my datagriedview column?
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Jun 26, 2010
I want to open a txt file and write into it numbers from 1 to 100 and put between every number enter.
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Jun 10, 2011
program that allows the user to enter a month and a number of years. (e.g March and 10 years) The program then displays all the months of the year from the entered month in a loop that runs as many times as the number of years.(e.g March April May.....December January February March....)
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Aug 26, 2009
i have a sql table which has 2 fields number & name
1 abc
2 xyz
Situation is that the app finds out max of number and increments it by 1 to get new number.The problem is when two users enter some record sometimes two records get saved on same number.
[Code]...
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Mar 7, 2012
I have a txtbox(for barcode).. if i input a item number in that txtbox and if that number will match in your database, the other information(shall we say, product type, item ID, etc..) will display in my other txtboxes..
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Oct 5, 2011
I need to create a small application that will force a user to enter an even number but i MUST use a loop. Here's what i've come up with:
Quote:
Dim bynombrepair As Byte
bynombrepair = InputBox("Entrez un nombre pair")
If bynombrepair Mod 2 = 0 Then
[Code]....
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Apr 16, 2012
i'm having a bit of a hard time on setting up the calculations.There are three seating categories at a stadium. For a baseball game, Class A seats cost $15, Class B seats cost $12, and Class C seats cost $9. Create an application that allows the user to enter the number of tickets sold for each class and the total revenue.
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