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?
I am a new VB programmer and am using TextBox in VB2008. Here are the problems I experienced in TextBox -
1, After I typed number in TextBox and found I need to type another number. So I used backspace key to remove it. But at this time program quit and displayed this problem: InvalidCastException was unhandled. How to solve this issue?
2, Can anybody tell me how to set number of characters are allowed to be typed in TextBox?
3, Can anybody tell me how to implement the feature that only numbers are allowed to be typed? In case letters are typed, how to tell user to re-type?
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] .....
How can i replace the enter key with an other set of chars
example - text.replace(" ", "this is a space")
that previous statement will replace all spaces with the string "this is a space"
how do i do this for an enter?
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.
View 1 Replieshow can i limit a user to enter 10 digit no like telephone no in textbox without using regular expressions?
View 12 Replieshow 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)?
View 4 Repliesi want to know how to assign specific number of digits enter in a textbox..
View 1 RepliesI 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.
View 9 RepliesAssuming 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?
View 2 RepliesI 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.
View 1 RepliesIn VB.net I've got the following line that removes all non-alphanumeric chars from a string:
return Regex.Replace(build, "[W]", "")
I now need to extend this to remove non-alphanumeric chars that aren't [] or _. I've changed the line to:
return Regex.Replace(build, "[W[]_]", "")
However I'm pretty sure that this says
replace non-word or [ or ] or _
how do I negate the tests for the [] and _ chars so that it says
replace non-word and not [ and not ] and not _
Some examples:
"[Foo Bar_123456]" => "[FooBar_123456]"
"[Foo Bar_123-456*]" => "[FooBar_123456]"
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
View 1 RepliesWell I made another thread but I know how to make textbox allowed chars but is possible with web browsers? Like if f1 - f12 is pressed then nothing happen like nothing have been touch.
View 1 RepliesI 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).
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.
View 9 RepliesHow to convert or make a cast of a List object typized as a container of chars like
Dim mylist As List(Of Char) = New List(Of Char)(New Char() {"1"c, "2"c})
in a simple array of chars as
Dim mychars() As Char
without make a loop for...
I have a Textbox in which the user types in a name for a folder to be created. However, Windows does not allow the followin chars:
[Code]...
how can I detect if press Enter in the Textbox Change event and not in Textbox Keypress?
View 3 RepliesOK, every time the letter a is entered into a textbox, I want it to enter in as a 1 instead. Help?
View 3 RepliesHeres 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.
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.
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]
View 4 RepliesI 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?
View 2 RepliesI 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.
View 16 RepliesSo 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.
View 2 RepliesSo 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?
View 1 RepliesIf 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.
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?
View 2 RepliesI want to open a txt file and write into it numbers from 1 to 100 and put between every number enter.
View 4 Replies