I have designed a form with textboxes for numerical entry. I need to validate each textbox so the number entered is an integer, and is between 0-1000. I am struggling to find how to validate the data entry.
I want to be able to reveal and then populate a certain number of labels. The inefficient way would be to SELECT CASE on the number of labels required and then populate these in turn. I am looking for something like this:
For i = 1 to RequiredNumOfLabels Label & i.visible = true Label & i.text = DataTable.Rows(i).Item(2)[code]......
is the problem as after the line is executed, lbl still equals nothing.The reasoning behind it is that I was trying to create an invoice generator in vb.net and I was hoping that this would be a simple way to do it - count the amount of items in the order, populate the labels with the names of the items, reveal that many labels.
With VB, but I've got the few basics down, file naming, adding objects, naming objetcs, etc. But the reason I'm on here is because I cannot complete even the first step. Our form is 640 X 480, and we need to have two labels, both have vertical scrolls. I know how to add and resize the labels to meet my needs, but I do not know how to create scrolling labels. Or are they text boxes? On our bubble chart (Do you know what that means?) it says lblInformation. We are going to have clickable radio buttons which will update the lblInformation with info about each of the radio buttons.
Have a very nooby question here, textbox2 contains a number and if the number entered in textbox1 is higher than textbox2 i wish to display a message box but the following doesn't seem to be working properly?
Sometimes it lets the user enter a higher number, maybe I am doing this wrong?
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
I want to create an array and Textbox & Button Array consisting of one thousand number and Letter( one thousand )
From 0 - 9 and From A - Z
When i press on Button, I want to see one thousand random number Every time the numbers must changed! Except the location 400 and 410 for example i want to see in the location 400 " 7 " for example and in the location 410 "Y" for example
I am trying to mkae sure that there has been 16 numeric digits entered into the masked textbox. If not show errror message and if so to call the fucnction ValidateLuhn. When calling Validate Luhn i want the program to tell me if the number entered is valid or invalid using the code in the function:
Private Function ValidateLuhn(ByVal value As String) As Boolean
Dim CheckSum As Integer = 0 Dim DoubleFlag As Boolean = (value.Length Mod 2 = 0)
Imports System.Math Public Class Form1 Dim var_ghost As Object Dim var_number As Double Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load [Code] .....
My question is; when you enter a variable to inputbox like "100.5" it shall return a numeric value at line1 and "100,5" too. But when I need to check for entered value is a real number or not (Look line2) CDbl("100.5") returns 1005 CDbl("100,5") returns 100,5.
Here's my Module Module1 Dim Board(3, 3) As Char Dim PlayerOneName As String Dim PlayerTwoName As String Dim PlayerOneScore As Single [Code] ..... How can I make it come up with no error when no coordinate has been entered, basically instead of a number being enter, the return key is just pressed.
how to validate 4 textboxes so that only numbers 1 to 4 can be entered but no number can be repeated.i already have code but it only validates some of the boxes and allows numbers to be repeated in other
Public Class frmGrid Private Grid() As Short Private Const intDimension As Short = 3
I have made an countdown app that is working in a normal way (added picture of it). Now when I select a number in the numeric box and click start, it starts to count down from that many minutes, but what I want is the number I put in the box *3. So if I put in 3 (points) the counter will count down 9 minutes. If it is possible I want a counter at the bottom every 3 minutes the value of the 000 at the bottom of the image multiply by 1 (+1 for every 3 mins timer1 runs).
I am trying to program the hamming code in vb... theoretically i understand and know how to do everything, first problem I've encountered is dynamic arrays in vb.net ... is it possible to determine the length of an array from the number of items entered in it, since I have no means of figuring out an exact number or length prior to several mathematical function which outcome will be the data .. directly saved to the array !!
Simple code! where am I going wrong. I get end of statement expected in line 4 after valid.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If valid('0') Is True Then msgbox("HI") End If
I have a UI that uses datagridviews / bindingsource / datatables of typed dataset for data entry. The dataset itself is serialized to a varbinary(max) in SQL. (i.e. no tableadapter, backend schema).I would like to limit the number of rows the user can enter into some of the grids (the data is used to fill PDF forms and I don't want them entering more rows than the forms can accomodate.).I have subclassed the datagridview, added a rowlimit property and tried to manipulate the AllUsertoAddRows property
Imports System.Windows.Forms Public Class dgv Inherits System.Windows.Forms.DataGridView[code]......
The behavior I see is that the messagebox comes up after leaving the max row even when the user is trying to leave the grid. I can lose the messagebox and deal with notification some other way but I thought someone else may have come up with something a little more sophisticated to handle simply causing attempting to add to many records to navigate out of the grid to the next UI control.
I have to write a program that does a count down on the number of seconds you entered in the GUI I have most of the code and it basically has to countdown the seconds i type in the txtStart. Attached is the program design..This is what i have so far with the code. It converts seconds to hours and minutes and seconds, but it doesn't do the countdown.[code]
the task is to have an image move up and down when a number is entered in the text box and the start button pressed. now ive managed to get the image to move up but not to sure how id get it to go back down.the code ive used so far is
Private Sub btnJump_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnJump.Click While picFrog.Top > 0 picFrog.Top = picFrog.Top - Val(txtSpeed.Text)
[code]....
but it comes up with a error. can someone point me in the right direction of what kind of code i should be using?
I am trying to mkae sure that there has been 16 numeric digits entered into the masked textbox. If not show errror message and if so to call the fucnction ValidateLuhn. When calling Validate Luhn i want the program to tell me if the number entered is valid or invalid using the code in the function:
I have 2 labels. One needs to show me the lowest number of the 10 in my rich text box and the other needs to show me the largest.
Public Class Form1 Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Me.Close() End Sub [Code] .....
Vb is not my language of choice , but I have to do this for school and I'm not having a very easy time with VB's documentation.I'm just creating a very simple console application that accepts user input: degrees in Celsius, and converts it into Fahrenheit. I want to make sure that if the user just hits enter without entering the degrees in Celsius, then an if else statement will catch and write to enter Celsius again.Here's what I've tried:
When I read a value from text box I want to make sure user has entered a number(int/float/double etc.) not a string. Is there any function to check it? otherwise how do i validate it.
The user has to enter the text in the textbox , to write a text user need to press the keys and release the keys. Write a code to count the number of keypresses and keyreleases and display the value in the labels.