In VB6 there is a feature called Control Arrays, where you name controls the same name and provide them an index value. This allows you to set a value by looping through the controls and setting each value. In VB .NET I can't create a control array?
View 6 RepliesHow can I do the same as the following in VB.NET
List<T[]> result = new List<T[]>();
// single combination
if (k == 0)
{
result.Add(new T[0]); // T is function type argument of generic function How can I write the last line above in VB.NET?
I tried:
result.Add(New T(0)) 'doesn't work!
So I have to create a jukebox with 3 different arrays, and 3 push buttons. Basically it looks like this:[URL]..
[Code]...
In VB.NET, I create my arrays like
Dim myArray = New ArrayList
But isn't there a way to create an array with elements without having to make a variable?
In Ruby, the long way was
array = Array.new
I am very new to vb .net. I want to create a set of arrays of textboxes during runtime of a program. For example when I click on a CommandButton it will ask me how many textboxes do I require as input. Then it will create that no. of textboxes instantly. This thing I have done in Visual Basic 6.0 but I can't do it here in .Net
View 3 RepliesI've got an issue with control arrays from VB6 and converting that code to VB.net. It was suggested to me that the forum has a lot of info on what became of control arrays and each one I've found so far seems to indicate that VB.net has devolved in thatrespect.The solutions I've seen all involve writing segments of code to replace the simple functionality of a group name for a control and a simple index property. Perhaps I've not found the right thread, but it seems that VB.net is woefully lacking in control arrays. In VB6, all I had to do was C&P a control and click, 'Yes,' to create a control array when prompted by VB. The Index was automatically created and incremented for each successivecopy of the control. It was simplicity itself to merely reference the Index for a control group.
View 15 Repliesas always I'm here asking you a probably stupid question, but I'm upgrading an old vb 6 project, so I'd like to have all the new code more object oriented and as compact as possible.I have a groupbox containing some textboxes. Each of them is filled with the "selecteditem.tostring" property of a listbox everytime I press a button (call it "OK BUTTON"), and everything works fine.
Code below:
For Each ctrl As Control In GroupBox1.Controls
If TypeOf ctrl Is TextBox Then
[code].....
I'm trying to create a dynamic jagged array. That is, one that i can increase the size of at runtime. Maybe its easier if I show you. I have a folder containing a varied number of files. What I want to do is set up a jagged array, with the file contents as the second array. So kind of like this:
Code:
FileList(0)
Filelist (0) (0) = Line1
Filelist (0) (1) = Line2
Filelist (0) (2) = Line3
[CODE]...
However, it throws a System.NullReferenceExeption when I try that. In addition, I don't understand jagged arrays all that well....Here is my code (that doesn't work). The jagged array must be accessible by other methods.
Code:
Imports System.IO
Public Class Form1
Public Skills()()
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my only objective is to create a scatter plot with only x and y axes. the data source should be from a 1 dimensional array. say i have these arrays:
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I have two arrays
a={a,b,c,d}
b={1,2,3,4}
now I want to create a 3rd array which should at least contains one numeric number and rest of alphabets, this code will generate unique usernames so it should not repeat the pattern of selection which is present in main array[code]...
I have the read the article "Creating Control Arrays in Visual Basic .NET" (link: [URL]) and I its very good and useful code for 1D array of objects. What if someone wants to make a 2D array of control objects. For example creating a "table" of 8x8 buttons that will be able to change properties by using the arrays x-y coordinates. Something like button(x,y). backcolor.black or similar.
View 3 RepliesHow I can make control arrays like vb6? I need for example,
button(1).backcolor=...
button(2). backcolor=... etc.
And I wanna work with it's indexes.
Allowing adding/removing new controls at both design and run time, with event handling?
View 6 RepliesI have a control array of custom picture boxes on my form, say PibBox1, PicBox2 etc. Now, I want to access the individual click events of this control arrays. For eg: If we have three PicBox1, PicBox2, PicBox3 on the form, I want to move into the click event of each of these and assign a value to a variable PicSeletced =1, PicSeletced =2, PicSeletced =3 accordingly as the PicBox1, PicBox2, PicBox3 are clicked. But I don't know how to move into the individual click events of the control array.
View 13 RepliesI have created control arrays in run time with following [code]...
But I don't know how I can have access to events now (especially textchanged)
For example I want when I write number in txtfrom (i+1) write it automatically in txtTo(i)
Is there any way to create a multidinensional array that contains arrays of different lengths (similar to nesting arrays of different lengths in python).
Because if I were to declare a variable Dim accounts(2,2) As Integer all 1D arrays at each dimension have the same length. Is there any way to create an array so that this is not the case?
e.g The above code would create an array like this:
[[0,0],[0,0]]
but would it be possible to create this:
[[0,0],[0,0,0]]
I am new to VB, trying to create a tic-tac-toe game but none of the tic-tac-toe tutorials use 2 dimensional arrays. Since tic-tac toe is 3x3 I created 9 buttons and want either an X or an O to appear depending on where the user clicks. I want one set of instructions to handle the multiple buttons. I was told to use Case statements.
This is what I have so far. Not sure how much is right but hopefully it gives you an idea of what I am looking for.
[Code]...
I was wondering how you create a form with three lists. Each list representing a different array.
I guess the question is how do you take an array and make it into a list so it shows up on a list box?
reading words from a text file and displaying them at random.The format of the text file is....
verb
noun
answer1
[code]......
I have an application that has a grid of rich text boxes on a panel. I would like to access and modify the text in the various rich text boxes during run time. I know this has been brought up a bazillon times over the years, but I would have done this as a series of control arrays in VB 6. Below is a simplified representation of how the textboxes would appear in a panel if control arrays were availble:
rtbA(1) rtbB(1) rtbC(1)
rtbA(2) rtbB(2) rtbC(2)
rtbA(3) rtbB(3) rtbC(3)
I find that I can access the properties of the rich text boxes via panel1.controls.item(x).text, for example, where x is the control index assigned by the panel when I dropped the controls on it.
Since I created the rich text boxes at design time and dropped them on the panel, it has arbitrarily assigned the index values, and they are not in the index order that I would desire.
How does one re-assign a control's index at design time for a controls collection on a panel? And if one has 24 text boxes on one panel, is there a way to break them into subgroups, such as rtbA(), rtbB(), rtbC() with their own index values?
I am trying to port a program I wrote with old VB 1 and I have many control arrays in the program, and it was so easy to do this in older versions of VB, now I am trying to find how to do this and all the answers I have found are a major productions, to replace something that was so easy to do? I would think that microsoft would make programming easer with each new incarnation. instead they are making it harder. doing away with the DATA and READ statement, now it is much harder to fill an array with a loop, now you have to enter each item in an array ONE by ONE. they did away with the ON statement, I had several ON statements, I had to make complex Select case constructs. to replace a simple one word statement?
To make an array of controls in OldVB all you had to do is Name a Second control the Same as the First, and a dialog pops up and ask if you want to make an array, you click Yes, and that's it, what could be easier than this?
Using MSDN documentation on creating Control Arrays in VB.net I proceeded to create a control array based on my UserControl. I modified the code programmatically to Loop through a For-Next loop to create 6 objects using the same UserControl. After creating these objects, I proceed to perform graphics on each control to draw a rectangle of which is in the center of the control by using a Timer_Tick event.
View 1 RepliesI am having trouble with .net again. I have a series of 10 text boxes. I want to be able to populate them from an array and read there values into another array. In vb6 I would create a text box array with 10 text boxes / indices. I could then populate them by txtbox(i).text = arrVal(i) and to reference them arrVal(i) = txtbox(i). I am stumped I can create 10 text boxes on a form if I have to, but I want them somehow tied to each other as they were in vb6.
View 1 RepliesI'm looking at controlling properties of an array of buttons in VB 2008 (express). I have been looking at the sample code from a whitepaper at MS, and it kind of makes my head spin compared to what was done in VB6! (and yes I'm an amateur
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I'm attempting to create a small app that allows a teacher to input 5 students with 5 test scores each. I need to create arrays of strings to hold the five students names, an array of five strings to hold each student�s letter grade, and five arrays of five single precision numbers to hold each students set of test scores.
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I have a form where I have to use control arrays to create a multiple input form i.e. rather than processing one transaction at a time up to 16 transactions must be processed. The following really havent given me much problems at this moment labels and textboxes. I use a for construct to create all the controls including a combobox. This is where my question comes in this form combobox has to be linked to a table in a database. But furthermore and this is where it gets complicated for me anyway each seperate combobox must move independly if i select row 5 in the table in combobox 4 combobox 5 which is havent touched should still be on row 1. How do I accomplish this. I'm using a webservice. I have tried passing a loaded dataset . The code that loaded the dataset is as follows
Dim DSInfo As New Project1.localhost4.AccInfo
DSInfo.Credentials = System.Net.CredentialCache.DefaultCredentials
InformationData.Merge(DSInfo.GetBusinessJournals)
[Code].....
this code doesnt however provide a link to the table equallly creating a dataset in the combobox method ,loading it and then setting it as datasource also provides no link. I know i'm missing something.
It seems as if the propertygrid control cannot display property arrays. Is this the case?
When I do this :
Imports System.ComponentModel
Public Class comPicturePirate
Private intAmountImages As Integer
Private strWebURL As String
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I have a VB.NET application and use some third party (closed source) ActiveX controls. One of the controls represents a "camera" (connected over several interfaces) and I try to write an example how to work with several cameras in one application. To do this I allocate multiple "camera" objects dynamically as an array which works as expected like this:
Const NUM_CAMERAS = 2
Private MyCameras(NUM_CAMERAS ) As xxx.MCamera
But the camera objects needs to be allocated with WithEvents because they raise events when a new image was taken. I found out that WithEvents variables cannot be typed as arrays and this is a pretty common problem so I also found some workarounds: [URL]. This is already pretty good and I adopted this to my concept. So I have a MyCameras array and a MyCamera all "without Events", first allocate a new MyCamera object, add a event handler and then put it into the array.
Unfortunately I get an error when calling
AddHandler Camera.ProcessModifiedImage, AddressOf MyHook
Normally "MyHook" is declared as
Private Sub MyHook (ByVal sender As Object, ByVal ModifiedBuffer As xxx.ProcessModifiedImageEvent) Handles Camera.ProcessModifiedImage
Like in the "Button examples" I just removed the "Handles Camera.ProcessModifiedImage" but I get an error that "MyHook" has not the same signature as the Delegate
Delegate Sub ICameraEvents_ProcessModifiedImageEventHandler(ImageIndex as Integer)
I am trying to do an application where several textboxes and buttons will be added to a groupbox.
for example..
code:
I might have anywhere between 1 and 20 rows of these textboxes and buttons. I can add buttons on from.. but how would i add the textboxes or buttons to the say Procedure for MyButton_Click... Handles MyButton_1.click, MyButton_2.click
how to do something similar to what was a control array in VB6 in .NET? I would like to be able to fill the contents of several text boxes using a FOR NEXT loop or something similar..... corresponding the contents of an array with the texts of an equal number of text boxes.
[Code]...