Bloquear Backspace En Un Textbox En O Dar Formato De Fecha A Un Textbox?
Aug 9, 2009
estoy haciendo una aplicacion en visual web developer 2008 express edition , quisiera saber como puedo bloquear el backspace solo en un textbox , es q en este textbox estoy manejando fechas , las cuales las agrego mediante el control calendar extender de ajax ... lo que quisiera es q el usuario solo puede seleccionar la fecha mediante este control y no la pueda borrar con el backspace (seria lo mas facil ) .......ya intente con la propiedad readonly del textbox pero al cargarse la pagina me borra la fecha introducida por el control calendar extender de ajax ........o de que forma podria validar q sea una fecha correcta formato dia / mes / año (de 4 dijitos) o mes / dia / año (de 4 dijitos)
I have built an addin for outlook that has a usercontrol shimmed into the interface. Everything works wonderfully EXCEPT for one textbox on one subpanel of the control. I have tried everything I can think of, but have not been able to resolve the issue:
The textbox *(A regular System.Windows.Forms.Textbox) functions as you would expect in any application with one exception. It will NOT accept the backspace key. So much so that the KeyDown, KeyPress, KeyUp events will not even fire when I press the backspace key. There does not seem to be any parameter suppressing it, and the control has focus. What is even stranger is that it works completely fine if you hold down the shift key while pressing the backspace key.
i am trying to make a program and i only want the user to be able to enter numbers and use the backspace this is my code so far.
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress Dim allowedChars As String = "0123456789"
[Code]....
i have tryed adding "ascii char (08)" to the program but its not worked
Private Sub txtInput_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtInput.KeyPress Dim len As Integer
[Code].....
i want to delete "b" from first textbox and i should delete "King" from second textbox the length of each word is same "Acer" "King" it is always 4 in length
but i am getting following error
"Index and count must refer to a location within the string. Parameter name: count"
i also tried by replacing "len-4" by another variable dim c as integer=len-4
I have made a textbox, which restricts character use to numbers and periods only. Nice, but now I cant enter backspace to amend any data typed in my textbox.
Private Sub TextBox10_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox10.KeyPress Dim allowedChars As String = "1234567890." If allowedChars.IndexOf(e.KeyChar) = -1 Then
Private Sub txtLogin2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtLogin2.KeyPress '// Ceci empêche l'utilisateur d'écrire des caractères ASCII ou même des espaces.. e.Handled = Not Char.IsLetterOrDigit(e.KeyChar) End Sub
It works fine and dandy except for one issue... the only way to delete text in the textbox using this is to highlight and hit DEL... But what if I wanted to simply back space... Any suggestions?
[code]The RichTextBox's text would act as if the user pressed backspace while typing in the TextBox.How is it possible to remove a character from the textbox when the backspace event happens?
I have 3 text boxes that update with each other. One the user inputs the text, two the text is used for translation and instantly deleted, and three displays the translated text. If I need to backspace the code updates the translation adding double of each letter I delete. I need a way to skip all of the application code every time the backspace key is held. My current code here (full dictionary cut to save space).
Public Class Form1 Public Sub RichTextBox3_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles RichTextBox1.KeyDown If e.KeyCode = Keys.Back Then [Code] .....
I'm trying to create a BMI Calculator with VB 2010. I have 2 TextBoxes for weight and length. I want to make sure that the user can only enter numeric (0123456789) values and also backspace and delete.
I want to control a textbox to only allow numbers, backspace and a certain length. Ive tried with the IsNumeric function but I cant seem to get it to work.
I have managed to format a text box to be formatted to two decimal places, and to only accept numbers.Only problem is i need to allow the backspace so that if someone types something wrong, they can backspace and type the correct number
Private Sub txtCAmount_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtCAmount.KeyPress 'Allow only numberical input plus decimal. Dim allowedChars As String = "0123456789."
I have a simple question regarding the KeyPress event. I'm trying to make it to where my TextBox on my form can only accept numbers 0-9, backspace and '.' /without quotes. I've successfully got it to accept numbers 0-9, accept backspace, I'm just wondering - what line do I add so that it can accept periods as well?
Here's my
Private Sub TextBox_KeyPress(ByVal sender As Object, ByVal e _ As System.Windows.Forms.KeyPressEventArgs) Handles _ TextBox.KeyPress
Is it possible to have a Textbox on a form that when the user inputs data, ( during Runtime )that data remains in the Textbox for good and the Textbox then becomes read only ? Is it also possible to make it so that the CD with the programme on, is in the PC when the programme is being used. Perhaps writing the Textbox data back onto the CD ?
Tenho um Listbox com 70 linhas. Fa no Listbox um Drag do ltimo item para mov-lo para o primeiro item, entretanto quando o mouse atinge o alto do Listbox a lista n vai para cima automaticamente. Algu sabe como fazer isto? Obrigado!Lindolfo
I am building an app. that needs some input from the user, the user will have to move a (selected textbox) by clicking a button. The TextBox will have to move 20 points down or up from corent location by clicking a button.
I 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 ....
I have a TextBox in a Windows Forms application in VB 2008 (.NET 3.5) where a user can key an estimate amount. I am allowing them to key dollars and cents, and I want to round to the nearest dollar. The original code had the rounding down when the data was written back to a table, and that worked fine - I have this code in a "Save" routine that fires when the user moves to a different screen or record:
Dim est As Decimal : Decimal.TryParse(txtEstimateAmount.Text.Trim, est) Dim estimatedAmount As Integer = Math.Round(est)
I decided that it might be nice to actually do the rounding as soon as they leave the field instead, so they're not surprised when they reload the screen and find that 1822.60 is now 1823. So I took the exact same code and added it to the TextBox.Leave event handler. And the weirdest thing happened: instead of the variable est being populated with 1822.60 after the parse, it gets set to -1! What the...?
Debugging the handler shows that the value goes into the parser correctly, and if I do the parsing manually via the Immediate window, it parses correctly, but when I let the code do it, it invariably gets set to -1. What's even weirder is that any number gets parsed as -1, not just decimals, and any non-number gets parsed as 0 (which is correct).
Has anybody else ever run into this before? I tried moving the code to the TextBox.LostFocus event instead, but with the same results. I have no idea what in the heck is going on, and obviously there are workarounds galore for this, but it just makes no sense whatsoever.
EDIT: Here's the full event handler (current behavior for which is to put -1 in the TextBox):
Private Sub txtEstimateAmount_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtEstimateAmount.Leave ' Take any dollars-and-cents amount and round to the nearest dollar Dim est As Decimal
I have 4 checkboxes and 1 textbox in webform if i type in textbox 1,2 then checkbox1 & 2 will be checked !
directly after if i type 3,4 in textbox then the all 4 checkboxes will be checked But i want the checkbox will be checked accorcding to the data displayed in text box ..if textbox1.text =1,2 then only checkbox1 and checkbox2 will be checked and others are remain unchecked ...
and if i checked checkbox3 and checkbox4 then only 3 and 4 will be checked and others are unchecked...
how to do that in page load event I want to do this with 50000 checkboxes ..and more.... which displayed in my webform
[Code]...
But if i type 1,2 in textbox then checkbox 1 and 2 would be checked and agin i type 3,4 then checkbox1,2,3 and 4 all the checkbox will be checked ...but i want ...what everi type in text box only that checkboxes will be checked and others will remain unchecked.....
when clicking a button, the current date is inserted into a textbox and the focus is transfered to the textbox.
the problem is that Textbox15.focus() select the text inside the textbox. i wish to give that control the focus but place the cursor at the end of the text, with no selection.
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click TextBox15.Text = TextBox15.Text & DateTime.Now & " " TextBox15.Focus() End Sub
I have a database I am creating with about 50 users over a network. There are about 6 groups of users and these users are spread across 10 branches. I want to block/allow users from particular forms and views. For example I want branch users forms to be filtered by their branch number but depending on the group they are in they can only see some forms. i.e. 50 users, 10 branches, each branch has about 5 ppl of where 1 is in group A and 4 are in group B. I want all users that belong to branch 1 to see the information they enter, but Group B enter data but cannot approved or delete, and group A can enter, approve and delete. So then. On my login form I have the user type his/her username but the i want LEAVE function to update 2 textbox where I have named GroupName and BranchNo. Basically to run a query and look for the username and return in one textbox that user's groupname and the other textbox the user's branch no. This information will be used to filter forms and block the user from certain controls. This is the code I have so far but still can't figure how to display the results.
Private Sub UsernameTextBox_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles UsernameTextBox.Leave 'Make Connection to database
[Code].....
It keeps highlighting the BranchNumber and UserGroup and giving error "Value of type 'String' cannot be converted to System.Data.OledbCommand
I have a form where a number of textboxes are programmatically created within a flowLayoutPanel and named by adding together 2 strings.
With the click of another button i hope to have all the values entered into these text boxes stored in a text file. However, i cant seem to find a way to add strings together to allow me to retrieve the values entered within the text boxes created.
Below is the code i have so far: BTW FLP is my flow layout panel and c is my calculated nmber of textboxes that are created.
Private Sub createTB(ByVal c As Integer) Dim x1 As Integer = 1 Dim y As Integer = 2
I have a checkListBox with items. I want a textbox to contain the items were checked. How can I go about removing it from a textbox if they user unchecks the item?
Private Sub frdList_ItemCheck(ByVal sender As Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles frdList.ItemCheck Dim item As String = frdList.SelectedItem[code].....
I am trying to put text of my dynamic textbox in some other textbox when user changes the selectedindex of a list.But dont know why it is giving me error's.
Private Sub UserText_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles UserText.TextChanged If Me.ListBox1.SelectedIndex >= 0 Then If TBnew.createdTB(Me.ListBox1.SelectedIndex) = 1 Then
I recently learned how to send the contents of a vb textbox to a flash textbox which is in an swf embedded on my vb form using a vb button to trigger...
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load AxShockwaveFlash1.LoadMovie(0, "C:sample.swf") End Sub
[code]....
This workds great, however what i REALLY want to do is the other way around.... I want to click a flash button thats in the embedded swf and have it put text into my VB textbox... The text I want to dislay is:"well done!" SO Far:I have built a simple swf with a dynamic textbox and a button. textbox is named "sampleField" and its var is: "sampleFieldVar"...button instance named "Button1" is an instance of "button".
using as2 I have put the following code onto the button: (read this somwhere online) on(press){
I want a text in my textbox in gray that dissapears when the user clicks in the textbox.I am not sure if that is a good enough explanaition so here is an example:You often have search boxes on websites or application.In the searchbox there often is a text like "search", "keyword", "type here".As soon as you click with your mouse inside the textbox it dissapears.I could make this in code but I was wondering if there already is a textbox property for this?
