Disable To Enter Some Letters In Textbox?
Dec 26, 2009How 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 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 Replieshere 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 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 RepliesHow can I disable letters from being typed into listbox?I know I can use maskedlistbox and easily select what can be put into it, but then if I use that can I set a limit to 2 units only?
View 2 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 do I disable the beep on the enter key? I am using KeyDown to use the enter key (instead of the tab key) to advance. But whenever I hit the enter key it beeps.
View 4 RepliesI have a problem in my form I am trying to stop my form from being submitted or closed
I have 2 buttons accept btn and cancel btn whenever the user pres enter or ESC the form is closing I tried everything from key press to key down and nothing works,
I am having a form and datagridview.now the problem is that when form load and iam write something like saniplast so data of datagriview select similar saniplast when i pressed enter so the datagridview_keypress
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When i press the enter key,i can login.But i face a problem which is there will repeat call the login function when i press enter key a fews times and there got error! how can i make the enter key is disable after i success login?
Private Sub button1_keydown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TabControl1.KeyDown
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How to make validations for textbox allow numbers only or textbox allow letters only?
View 14 RepliesI have two functios to catch enter key:
Protected Overrides Function ProcessCmdKey(ByRef msg As System.Windows.Forms.Message, _
ByVal keyData As System.Windows.Forms.Keys) As Boolean
Dim handled As Boolean
If keyData.Equals(Keys.Enter) Then
handled = TypeOf Me.ActiveControl Is ComboBox
Me.SelectNextControl(Me.ActiveControl, True, True, True, True)
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Can you show the coding needed to disable the enter key on a textedit box or at the form level?This form is using multi-line textedit boxes and I would like to prevent the user from pressing the enter key from jumping to the next line in the textedit boxes.
View 1 RepliesIs there a way to prevent the Enter key from being interpreted as a button click.
I am trapping key strokes at the form level but if a button has the focus and the ENTER key is pressed I cannot trap the enter because the button consumes it as a button click event. I am also unable to trap the enter key in any of the button's key events.
I am interfacing with magtripe swipe and barcode readers that send their information as keystrokes with a CRLF at the end. I have a work around by chaning the focus to a textbox anytime keystrokes are detected but I am hoping for better control.
Is there a way to disable the buttons ability to do this?
I find that each time there is a new line when enter key is press in VB intellisense is annoying. Although space is ok, but each time it has a new space and I have to press return to remove it, which is also inconvienient for multiple selections.
View 1 RepliesIn vb.net datagridview the default Enter/Return key behavior is to move to the next row is there a quick and easy way to avoid that.
View 3 RepliesWhen editing C# code in Visual Studio 2010, the ENTER key makes IntelliSense complete the current suggestion, without adding a new line. In VB.NET, the default IntelliSense behavior for the ENTER key is to add a new line after completing the current suggestion.
How can I configure IntelliSense to change the VB.NET behavior to the C# one?I already know that I could press TAB or SPACE, but out of habit I always end up hitting ENTER (and changing line).
Is 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 Replies