Make The Textboxes Only Accept Letters A, B, C, Or D As Answers From The User?
Nov 15, 2011
I'm having trouble with the Try...Catch code. I'm trying to make the textboxes only accept letters A, B, C, or D as answers from the user. I'm also having trouble matching the two arrays. I wanted it to be like if textbox1 is A then it is correct but in a loop. Please take a look at my code.
This is the programming challenge instruction for reference: The local Registry of Motor Vehicles office has asked you to create an application that grades the written portion of the driver's license exam. The exam has 20 multiple choice questions. Here are the correct answers to the questions:
[Code]...
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Oct 14, 2009
I have an assignment that requires me to edit some code, I already did most of it but I need to make txtState control to only accept letters and the backspace key. I was never taught how to do this and I only know how to do it with numbers. Here is my code with everything done, including the format I was taught to do keypress in with numbers and backspace. Can someone show me how to replace those numbers pr whatever to work with letters?
[Code]...
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Jan 11, 2010
On Form Level, I use following codes to make textboxes to accept only numbers,How to add these codes in main module, instead of of writing these codes on every form.
If TypeName(Me.ActiveControl) = "TextBox" Then
With Me.ActiveControl
If Not IsNumeric(.Text) And .Text <> vbNullString Then
[code]...
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Sep 19, 2011
Using a DataGridViewComboBoxColumn, the goal is to make the ComboBoxes accept user's new items and also the possibility of choosing items that are already present.I'm aware of using EditingControlShowing event of the DataGridView to change the DropDownStyle of the DataGridViewComboBoxEditingControl at run time to allow this, but I'm wondering if this can be done at a lower level.
What I'm doing now is extending DataGridViewComboBoxColumn, DataGridViewComboBoxCell and DataGridViewComboBoxEditingControl, hoping to change the EditingControl's DropDownStyle in the moment I instantiate it. So far, no luck.The debugger shows the right assignment is being executed, but nonetheless, the DropDownStyle is popping at the EditingControlShowing (using the event for debugging purposes) as DropBoxList, not DropBox, which is the intent.
Here follow the classes:
Public Class DataGridViewComboBoxColumnALT
Inherits System.Windows.Forms.DataGridViewComboBoxColumn
Public Sub New()
[code]....
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Dec 7, 2009
My listbox will accept any letter I add, but I can't get it to accept any numbers. I tried a case select for 1-100 and I couldn't get that to work either,
Private Sub btnCount_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCount.Click
'Determine word count and average letters / word in the sentence
[Code].....
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Mar 9, 2012
how to make the values in a text box accepts only letters in the text box for data that are for letters only and numbers for data requiring numbers only
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Sep 9, 2009
Quick question here about how to get it to accept capital and lowercase letters. I am running code that has certain Customer Types such as "T". It returns different information for that customer. There are only 3 types "T", "R", and "C". The rest return the default information. When I enter "t" into the textbox it returns the default information, not the information for "T". How do I go about getting it to accept "T" or "t"?
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Sep 12, 2011
How can I use user generated answers and incorporate them into my script? I want to make an extremely simple AI program which asks for your name and then says "Hello 'Insert name entered by user' " in a Message Box.
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Aug 15, 2009
Public Class Final2
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
there's a logic error in this code. it accepts negative value but output positive one. just wonder if Math.Abs functions here.
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Mar 26, 2011
How do I validate textboxes so that they accept only numerical input (1 2 3 etc and not abc @$ etc)? Is there some kind of property of the textbox that I have to change?
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Mar 4, 2011
trying to make a Multiple Choice quiz, with 20 questions
-4 RadioButtons
-2 Label (Reading the Questions) and 1, keeping a score count
Do I wanna make some arrays like Questions(20) and Answers(20)
Dim ScoreCount as Integer
So I want it to be a little screen, and once you click a Radiobutton to choose answer, it will change the label to Question(2) so forth.. but I am unsure how to do this. I am fairly new to vb, im doing this to learn.How do I make it so everytime you click a radiobutton wether it's right or wrong, the next question and possible answers all change??
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Sep 10, 2010
I've been looking through the book I own and I've been looking online but I just don't understand what code would I write to have it check the text box or input box for the right letters in a word?
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Sep 7, 2009
I want to know how to accept data from user? I want to accept about 10 datas from user. Before this I use Input box, but it is not a best way for user to key in 10 times data that required. What should I do and what the appropriate way to accept 10 data from user in 1 screen?
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Nov 15, 2011
I am looking for a tool that will accept an address from the user and return a 9 digit zipcode as well as validate the address or suggest an address, like on fexed or ups website. Its got to work with vb.net and asp.net Is there a tool like this available? any recommendation?
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Sep 24, 2010
I am trying to figure out how to make a program which can accept switches like cmd.exe /k or /c basically i want it to accept commands by myapp.exe /c mycommand.i tried searching and googling but no luck. Also is there a way to run a function like that? And if anyone is wondering why then basically i am copying a script to my domain computer and executing it. This i already have done but problem is its just getting too much copyin multiple scripts and executing i would put everything in on and run em by switches.
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Jun 7, 2010
How should i make a textbox to accept only string? And if there is error to appear the Error Provider. I have fixed it for the integer, but it doesnt work in string.
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Oct 17, 2011
Command line programs like ffmpeg.exe accept a parameter like so: c:> ffmpeg.exe -i img%03d.png img.gif This will grab all these images in the directory and use them inside the program:
[Code]....
Is there a clever way to implement this in my VB.net command line project, or do I have to parse the argument for the %0?
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Oct 5, 2009
I am trying to make a textbox accept on the numbers 1-4 & the backspace key. The numbers part is working fine, but it will not delete the number once it's inputted into the box using backspace. Here's my existing code:
Private Sub txtCode_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtCode.KeyPress 'allows the textbox to only accept 1-4 & backspace If (e.KeyChar < "1" OrElse e.KeyChar > "4" _ AndAlso e.KeyChar = vbBack) Then e.Handled = True End
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Nov 10, 2008
hows to make a textbox accept only numbers? and ".". i tried looking in the Help, couldnt find something relating to it. i guess it's something to do with the keys pressed on the keyboard so if i could determine and reject certain keys (anything thats not a number) it could work.
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Oct 15, 2011
I Want to make a class accept string variable like this
Dim mystring as custstring
mystring = "test var"
like how we declare string classes I tried to use property as such
Public class cust
dim inputstr as string = ""
Public Property cust() As String
Get
[code]....
But it doesn't seem to work?
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Jun 29, 2010
I'm attempting to learn VB in college. My first project is to create a program in Small Basic and then write it in Visual Basic. I'm looking for the equivalent of TextWindow.ReadNumber() from Small Basic in Visual Basic. I want to force the user to input a number not letters. I'm writing this program for the Console. Is this possible? During my testing I entered a word instead of numbers and the program crashed.
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Nov 27, 2011
Basically I just want it so that someone can type in their password but it comes up as Asterisks (*) instead of their password.I'm using VB 2010 and making a Console Application.
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Feb 3, 2010
I have written a custom Bindable RichText Box, so I can bind to the Document property. However, as soon as I set my document content, the only keyboard input it accepts is the backspace key (???). No other keyboard input is acknowledged (including the arrow keys).
[Code]...
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Aug 8, 2009
Im developing an app at the moment where standard letters need to be generated to be sent out to customers. With the customers details then filled in as you would expect... name, title, address, etc. This is an app ontop of a SQL db. The way i envisioned this working was to send the customer details to another form that had a crystal report in, and send the info via a SQL query, just as you might get a grid view to open with a query.
Thing is im struggling with it, getting the query to work especially. Ive built the report and put the relevant field place holders in there, but i cant get it to open with just the one customers info in there, it gets every customer and builds a report several thousand pages long! This is because of the "command" thats on the report that i stuck in there on a temp basis while i designed the thing.
However i want the the report to open via a button on another form, and then fill the report with the customers details (using the customer ID number on the form the button was clicked) Since im struggling with this so much, im actually wondering if im going the best way about this? Are there better ways of generating a standard letter that the end user can then view, check it, and hit print?
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Apr 23, 2012
I've got a little function that just changes empty and null strings to "null":
Public Function CatchString(ByVal stringValue As String) As String
If stringValue = "" Or stringValue Is Nothing Or stringValue Is DBNull.Value Then
Return "null"[code].....
I added the bit about DBNull because sometimes it gets null values from a database. This doesn't work, though, because it won't take DBNull as a parameter.I tried changing the stringValue parameter from a string to an object, but then the If statement gives this error:
Quote: Object reference not set to an instance of an object.How do I make the function accept DBNull as a parameter?
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Mar 12, 2010
I need help with making a textbox only accept numeric values only, as in setting a timer interval.
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Apr 28, 2011
How to make a text-box accept only numeric characters (0-9) ? and give an error Message if it contains any alphabets or symbols.
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Feb 3, 2012
How do I make a textbox control to accept dates only and convert to a valid date format? I don't want to use the calander control. e.g. if I enter 2/17 or 2-17 or 02/17 or 2/17/2012; it will convert to 2/17/2012
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Aug 24, 2010
I'm entering data into a text box, and I want to make sure the data I enter contains only letters. Is there any way in Visual Basic that I can go about doing this?
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Sep 14, 2009
I'm writing a small application to detect the insertion of USB memory sticks and prompt the user to accept the device or reject it. Rejecting it would prevent its being loaded by Windows. I have the code that detects insertion & removal working fine but have no idea how to cancel the insertion.I was thinking that I could intercept the DEVICEARRIVAL message and kill it off before its actioned by Windows but I am lost with this.code to show the way.Heres the main part of the code I have so far-
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
'This kills off any 'autoplay' capability in the stick
If QueryCancelAutoPlay = 0 Then[code]......
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