i have to create for loop that create each time a new GroupBox with new name and location this is not a homework.it is a personal Application to manage my information [code]i have to change the name of the first Dim in the loop each time , but i couldn't.
View 2 Repliesi have never learn to loop an groupbox or anything so i don't know what wrong but the compiler said "NullReferenceException was unhandle" and here is my code.
iNumberOfPassengers = CInt(txtAdult.Text)
gboPassengerDetails.Hide()
Dim gboNextPassenger(iNumberOfPassengers) As GroupBox
[Code].....
I have several textboxes in a winform, some of them are inside a groupbox. I tried to loop over all textboxes in my form:
For Each c As Control In Me.Controls
If c.GetType Is GetType(TextBox) Then
' Do something
[code].....
I would like to use code to create a checkbox with default properties and place it at a certain position in a groupbox. For example, i would like to do this by pressing a button and that i can give in the name and tag by use of an imputbox. Also, i have noticed that if something like this is done, these changes aren't permanent and don't apply to the designer nor the code in VB. Is there a way to let the newly created checkboxes appear in the designer? And what about permanently deleting checkboxes by pressing a button. With "Dispose()" it isn't deleted from the designer...
View 2 RepliesI've been struggling with something I imagined would be simple. My aim is to create a TextBox or Label with in a GroupBox using VB.net, yes I could use the Toolbox/Common Controls to do this easily, but it's a pain when planning on making more than just one or two of them
Here's my current coding to create the actual text box.
[Code]...
All that works perfectly, but how would I allow it to show up within a GroupBox?
I am currently creating a program for my own use but I need some information about groupboxes. I have 3 groupboxes with each some checkboxes in them. My question is: How do i get the number of objects (checkboxes) in a groupbox. I tried looking for the index like in a listbox but it isn't part of the controls.
View 3 RepliesI'm trying to deny more than 1 decimal and 2 numbers after the decimal.What I have so far:
Private Sub grpSales_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles grpSales.KeyPress, txtJan.KeyPress, txtFeb.KeyPress, txtMar.KeyPress, txtApr.KeyPress
'allows numbers 0-9 (decimal) (space) (back space)
[code]....
i have a sort of problem when i try to add some linklabels in my groupbox. I used this
Me.Controls.Add(Groupbox3)
Groupbox3.Controls.Add(FlowLayoutPanel)
I can only add 4 linklabels no matter how big is the groupbox, i tried autoscroll but nothing. How can i do to store minimum 20 linklabels in a groupbox? Here is the whole code i used:
Imports System.Net
Imports DevComponents.DotNetBar.Controls
Imports System.Windows.Forms[code]....
Is there any way, maybe with a specific reference to put a control that records what plays wmp activex and to save somewhere on your computer?
Here using VB .Net 2008. I seem to be having trouble getting group boxes to appear when I click a radio button.
For example:
CODE:
This indeed brings up the first radio button however I have other groupboxes underneath which with the same code will not appear when the radio button is checked.
Eg:
CODE:
The second groupbox does not appear and is directly behind the first groupbox. The Top code doesn't seem to be working either.
I'm creating 50 picbox in code. they are named Area1_1 to Area 1_50.
They all have different XY position and different size, setup in % of the form width.
Like this:
Code:
Dim Area1_1 As New PictureBox
' Dim 48 other box...
Dim Area1_50 As New PictureBox
[Code]....
But it don't work. Probably because the controls is not added to the form yet...
I need to create a variable number of Group Boxes, at runtime, inside an existing Layout panel. The name of the Group Box also needs to contain the integer, from the loop, as part of its name. i.e x = 1 to 3 > GroupBox1, GroupBox2, GroupBox3
View 5 RepliesI have some variables that are distinct by numbers, like in1, in2...If I have for loop, how would I access those variables, using the counter, and attaching it to the variable?I believe in JAVA, you could just use in+ct... where ct is the counter to access the variable.also how could you make a new variable in the for loop?Initially I had variables declare outside of the for loop. The problem was how to access those variables using the for loop.
var_nm1 = in1.Text
var_nm2 = in2.Text
var_nm3 = in3.Text
Dim nmList(2) As Integer
[code]....
This is object oriented programming, and I made the textboxes in1, in2, and in3 using the GUI editor. that was so easy.
i have a web browser control, that refreshes pages on a loop after calling a few subs, i need to create a delay in the loop so that the page has a chance to refresh and redisplay before it loops again. i tried the code below, but it seemed to freeze the entire form, elements including, so the web browser didnt refresh before the loop, so how could i create a non form-freezing delay for a loop?
For count = 1 To 20
WebBrowser1.Navigate("URL")
simcheckcheck()
[code].....
I have ran into a situation where it would be a lot faster to create a thread by the users demand. Basically, what I have is some kind of downloading program which grabs URLs from the clipboard into a DataGridView. Now when multiple URL's have been added, it becomes really inefficient since only one URL is being processed at a time.Now what I wanted to do is, create a thread for each URL. The parameter for each thread are the URLs which are stored as strings inside the DataGridView rows.[code]
View 3 RepliesI wanted to draw a chart on a picture box. So I create a form, put a picture box on it, and then in the code of Form_load, I put a handler to the paint event of the picture box. This seems to create an infinite loop, judging from the behavior of the form.
View 19 RepliesI am trying to populate a dictionary with objects created from data in a recordset, but am having difficulty with VB's object referencing. I am very new to VB. Pseudo code of what I am trying to do:
dim dict as Dictionary
rs = getRecordSet
while rs.moveNext
set myObj = new MyClass
myObj.properties = rs.relevantFields
dict.add myObj.getUniqueKey, myObj
wend
However, all 'objects' in the dictionary are actually references to the most recently created (and thus last) object in the dictionary. I know why what I am doing above is not working, but I don't know the correct way to do it so that each element in the dictionary is it's own object.
VS 2008 Creating a Password Application with Do Loop
View 4 RepliesI'm doing this right now - .Add'ing parameters and then at the bottom I'm looping through them and setting the Source column by just removing the "@" character from the parameter name.
[Code]...
I am trying to loop number into something like this.
0
12
345
[code].....
I would be grateful with some help with reading a text file into a Richtext box. The code I have at present appends the first line of text as I want it but the rest of the lines of text do not alter. I need a loop to read to the end of file and display in Richtext box. the code i have at present is this:-
[Code]...
I have a dataset which includes some numbers, I want to calculate the sum of the difference in the numbers how do I do this? For example my dataset looks like this:
[Code]...
Does anybody know how to count the number of iterations in a for-each loop? I want to have a variable inside the loop, returning the corresponding counter every time the loop iterat
View 5 Replieslearning about loops (still a beginner) in VB.net. I have got the below code and basically it is meant to stop the loop once it reaches a number above 20. Now, the problem is that it does stop after number 20 but the last number that is displayed in the list is always above 20..... how I can stop it showing the last number as above 20?
[Code]...
Looking for a bit of help here. I know my If...Then...ElseIf statement is somehow off, but not sure how. Could someone point me in the right direction? I know I am almost there but need a nudge in the right direction.
[Code]...
I have a button that searches through a binary file to bring up customer information with the following code:
[Code]...
My problem is, I need to create a variable which holds the record number, so that the record can be edited, and put back into the file at its previous location, how would I implement this? Not sure about the code.
Is there a way to loop words for a number of times (like i want to loop a word for only 10 times....How would I go by doing that?)
Quote:
Originally Posted by EXample Like I want to have a textbox and If i put 10 in the textbox It would loop the word ten times or is I put 20 in the textbox it would loop 20 times ..and ..etc...and ...etc...
I am using some arrays that are pre-filled and I am having a random number generated between 0-10. That random number will then go in to all 5 arrays and pull the item from that location. I think try to take the sentence that is generated into another string. Once that is complete I then go through the final array to pull all the sentences and concatenate them together.
Currently I've only been able to get 1 sentence to print out of 5...a fresh pair of eyes would prob see where I am going wrong...I've been at this for awhile and wouldn't mind some advice to where I am going wrong.
Public Class MainForm
Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[CODE]...
I am doing a Coin Toss program for school and I'm getting my butt kicked by this thing. The following are the instructions exactly as my instructor gave them:Use the random number generator (see the code below) to simulate a coin toss. First ask the user for the number of repetitions. Next, set up a For loop to execute that many times. Each time you enter the loop, call the random number next method. Assume that a random value <= 5 is considered a "Heads"; a value >5 is a "Tails". That is, if the random value is <= 5, add one to an accumulator named intNumHeads. If the random value is >5 add one to an accumulator named intNumTails. When the loop finished, output the number of heads and the number of tails in a text field with appropriate labels.Dim intRandom As New Random()Dim intNumber As IntegerintNumber = intRandom.Next(0, 9) In my application I have the click event of the "Flip Coin" button coded as follows:
Public
Class frmToss
Private Sub btnFlip_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].....
I need a random number of 6 (1 ,6), and to loop it 3 times. I tried this but it gives me error for - if myRandom.next(1,6) Then:
Dim myRandom As Random()
For i As Integer = 1, 3
If myRandom.next(1, 6) Then
End If
Next
Also I need to know the code for putting a picture into a picture box.
A Visual Logic flowchart that requests a positive integer as input, and carries out the following steps:If the number is even, divide it by 2. Otherwise, multiply the number by 3, and add 1 to the result. Repeat this process with the resulting number, and continue repeating until the number 1 is reached.After the number 1 is reached, displayed how many iterations were required to reach the number 1. (Hint: a number is even if number Mod 2 = 0.)
View 5 Replies