here is my problem, I'm using a textbox to enter only letters, no number, so i'm using a loop with a decision structure to tell me that the input data is wrong and prompt to input the data again but when I enter the correct data in the input box, vb2010 display this error "Conversion from string to type 'Double' is not valid.", this problem is making me crazy.
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How to disable to enter some letters (a,b,c,d...) in textbox? I want to can write just numbers and colon ( in textbox.
View 11 RepliesHow do i make it so that you can only type in numbers and letters in a textbox? I want to disable the use of ("*(&$.....etc.) those types of symbols.
View 3 RepliesI want to validate my textbox so that a user can only add letters of the alphabet and not anything else. so far the code that I have allow alphabetic entries but does not allow to delete and backspace[code]...
View 9 Repliesi want to validate my textbox so that a user can only add letters of the alphabet and not anything else. so far the code that I have allow alphabetic entries but does not allow to delete and backspace
e.Handled = Not Char.IsLetter(e.KeyChar)
When my program is looking at the keys it capitalizes all the keys and keys like enter, space, alt, and other keys are not registered so they dont come out correctly. I am writing information to a "RichTextBox1" and I need to know how to register all keys to this.
1. I need to know how to decapitalize all the letters.
2. How to make shifted letters work.
3. Make keys like enter, shift, and tab show up as text.
basically just trying to use if statements for my code so people cannot enter the wrong information like letters into the account number box
If (txtAcountNumberInput.Text = "") Or (txtTelephoneNumberInput.Text = "") Or (ComboBoxPhonePlan.Text = "") Or (txtCallDuration.Text = "") Or (txtCallDate.Text = "") Or (ComboBoxCountryBeingCalled.Text = "") Or (txtTimeAsCustomer.Text = "") Or (ComboBoxEveningCall.Text = "") Then
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so you see up the top i have if all any fields ="" then error that's fine it's a problem i need to so if statements so "account number" and hone number" cant be letters etc and if they are a error box will come up how i have done it does do that but ti still continues down the code hence cashing when getting to declaring things how to fix this?
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 RepliesI 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 RepliesHow to make validations for textbox allow numbers only or textbox allow letters only?
View 14 RepliesIs there a way to grab the first 2 letters in a textbox?
as in if the user puts in hc7972
i need the full hc7972 bit and instead of having another textbox i can just use this to get the value instead
like the first 2 letter represent the team name
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click[code]...
i wondered if its possibile to have a textbox(multiline) full of letters eg
qwqewrtrfuiuouoiihgfgxfhcgjhvkjgjkvcvvnhj
adfsgfsgtrdsgrdgdrgadstgahfthfjfjfhsdhfhjkkxzc
cvxbxmbcnmhfgjdsfjtjnvvczdnerjEtrurtyururvfjsdf
and nor the number of spaces from a desired letter to the last.In the case above there is E(which i made capital letter).How can i code to know that from that E till the end there are 17 spaces?
How can I allow only letters A-Z (both lowercase and capital) and numbers 0-9 to be entered into a TextBox control? Also spaces are not allowed either.Goldfish64
View 2 Repliesis there a way to only allow uppercase letters in a textbox?
I want to run checks against something else and it's needs to be in upper case.
Is it possible to count the number of letters in a textbox OR label [code]...
View 7 Replieshow to change letters in TextBox example:
TextBox1.text="abcde fg" and a-->x b-->y c-->z f-->t after that must be TextBox1.text="xyzde tg"
i think that i need something like this
TextBox1.Text.Replace("a", "x")
TextBox1.Text.Replace("b", "y")
I'm just trying to add a simple function to the textbox for security that if i only allow 0 - 9 Numbers and i try to put a letter it wont let me
View 5 RepliesHow can i reverse letters in textbox...
textbox2.text = textbox1.text.reverse
This code doesnt work!!
write up the code for a program that could find all combination of the letters in a textbox and input the outcomes into a listbox, and I don't want any of them to repeat.
View 6 RepliesI have a textbox and I need to restrict entry to only the letters A-Z , a-z and the space key. I know I need to use something like
If (Microsoft.VisualBasic.Asc(e.KeyChar) < 65) _
Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 90) etc
with an e.handled at the end
how can i delete the first 6 letters from a line in any TextBox?
View 39 RepliesI'm on VS 2008 I have one form contains many textboxes,when I write in one textbox (UserName) the letters and numbers should distribute to the other texts where each textbox has only one letter or number from the original text to get them ready to be encrypted.
What code I can use in text change event that takes the whole text and throw it in the other textboxes so each textbox has only one value ?
I want to set the mask for the textbox for only letters and numbers with no spaces like thisthe "*" represents letters and numbers)
View 17 Repliesis there any way to take letters out of a textbox then re-display them scrambled, such as the word Tissue then at the push of a button make the word displayed sisute or some other order?
View 11 Replieshow to typing uppercase letters into a textbox in VB .net 2005
View 5 Replieshow can I detect if press Enter in the Textbox Change event and not in Textbox Keypress?
View 3 RepliesI have a textbox which controls the interval of a Timer control. How do I filter out letters? Is it possible to restrict entry to numbers only (like if you enter a letter or a space, nothing happens)? Is there a property of the textbox that can accomplish this?
View 4 Repliesi want to create such a textbox in which only the numbers and one period should be allowed to type.
View 6 RepliesI'm doing a programming course at college, and I'm making a simple program that finds the mean of three numbers. Making the basic program was easy, but I can't work out how to validate the text boxes so that they only accept numbers. I've Googled, but I haven't been able to find anything. I have a look on the forums here but couldn't find anything either.
View 3 RepliesHow can we limit the textbox to input ONLY three numbers and three letters?
View 2 Replies