Creating Controls From Code In FOR NEXT Loop?

Nov 24, 2009

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...

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VS 2008 Creating Controls With Code?

May 15, 2011

The editor basically uses a bunch of labels and pictureboxes (for now) and then an image is created from the panel which contains all of the controls.It sounds quite confusing, but basically i'm trying to create something like visual studio itself, which will allow "controls" to be added onto a panel, and then everything can be exported as an image when the user chooses to.I've worked out all the code to move controls and exporting the image, just having trouble trying to work out how to add an event for newly created controls as you can only handle a control, and not a variable.

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Setting A 'default' Value To Controls (textbox) (loop Controls)?

Nov 11, 2009

I have aspx form with several textboxes.They are populated with values from a table via retrieval of a dataview.If the row count for the dataview is 0, then I'd like to reset the values in all textboxes. How can I loop through all the textboxes and set a default value?I've tried the following, but no sucess.

For Each ctrl As Control In Page.Form.Controls
If TypeOf ctrl Is WebControls.TextBox Then
CType(ctrl, WebControls.TextBox).Text = ""
End If
Next

My first For Loop was using Page.Controls but it returned only 1 count.The textboxes are inside a tabpanel (ajax), so do I have to locate the tabpage and then find all it's controls (for each tabpage)?

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VS 2008 Loop Through Controls Doesn't Get All Controls?

Jan 21, 2011

I am rather irritated at this. I have no clue why looping through controls on a form and in groupboxes leaves out 75% of the controls.

Here's the code I have:

Dim settings As String = ""
Dim gbControl As Control
Dim gbbox As Control

[Code]....

I want to have setting save all settings to an ini file, and not have to reprogram the saving routine when I add a group box or control. At random times, any number of controls can be disabled, checkboxes can be checked and unchecked, radiobuttons can be checked and unchecked. Regardless of the state of the control, I want the control to show up in the loop. But they don't. Only controls that are enabled and only checkboxes that are checked, every other control state is ignored. That's crap, and is definitely not what is needed by any programmer of any type. We're capable of determining if a control is enabled, hidden, checked, visible, and otherwise.

How do I get the controls to be included in the loop regardless of their state?

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Add Controls To A Form In Code And Set The Properties Of The Controls?

May 24, 2009

How can I add controls to a form in code and set the properties of the controls using the With statement?Also I would like to know how to add a container control and then add a control to that container.

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Add Shapes/Controls In A Loop VB.NET

Jun 8, 2011

I've to show some PowerPacks.RectangleShape in a PowerPacks.ShapeContainer. A loop in my code add shapes to the container

(objshapecontainer.shapes.add(objshape), but at the end of the loop, only the last shape is displayed, in fact objshapecontainer.shapes.count doesn't exceed 1

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Loop Controls To AddHandler?

Feb 20, 2012

I have the following code to dynamically add handler to my controls

Private Sub HandleMyControls(ByVal Proc As EventHandler)
For Each c As Control In Controls
Select Case IsContainerControl(c)

[Code].....

There are some subs and functions that help me in what to change and where to loop. My problem is that right now, I can set only .enter event of the control I tried to set parameter as Event but i got an error on that. So, what I want to do is something like this:

Private Sub HandleMyControls(Event as ???????, ByVal Proc As EventHandler)
If MatchControl(c) Then
AddHandler c.Event, Proc
End If

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Loop Each On Page Controls

Jun 11, 2009

I'm new to ASP.NET and i would like to ask, How do i loop on each Labal control in the page.

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Loop Each On Page Controls?

Sep 8, 2010

How do i loop on each Labal control in the page i tried :

For each lb in Label.Conrols
next

but for no avail

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Loop Through A Collection Of Controls?

Feb 24, 2010

Im trying to loop through a collection of controls see code:

Private Sub addZeros()
For Each ctrl As Control In Me.Controls
If TypeOf ctrl Is GroupBox Then

[Code]....

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Using For Each Loop To Work With Controls

Jan 2, 2012

I can use the below code snippet to clear the text from each textbox on a form.
For Each ctl As Control In Me.Controls
If TypeOf ctl Is TextBox Then
ctl.Text = ""
End If
Next

But if I want to use it to ensure that all radiobuttons in a group of radio buttons are unchecked then it doesn't work i.e.
For Each ctl As Control In Me.Controls
If TypeOf ctl Is RadioButton Then
ctl.checked = false
End If
Next
I'm assuming it is because the checked property is not common to all controls.

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VS 2008 How To Loop Through Controls

Aug 23, 2011

I can't use the normal method, my controls (picture boxes) names contain numbers such as 00, 01, 02 etc which corrispond to my multidimenional array.

I'm attempting change the picturebox's values in a for loop via the counter in the loop, for example:

For i = 1 To 4
PictureBox(i).enabled = False 'Picturebox1 will be the first one(counter starts at 1)
Next

I basically need to access each one as I would with an array, I can't type the full names out, can only refer to them via their names + counter number because I don't know what control name I would be dealing with at that time in the loop.

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Asp.net - Loop Through Dynamically Created Controls

Mar 1, 2012

What I am trying to do is dynamically create a bunch of dropdown lists and then I want to loop through them and update the database with those values, but the problem I am facing is that I create the dropdown lists, but then when I go back to loop through them they are no longer in the panel. I don't know why but when I am debugging I have a count of 50 controls in pnlTeacherSelect right up until I press the button that calls prcChoose.

[Code]...

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Loop Through All Forms And Controls In Project?

Sep 5, 2008

I want to create a table with 2 fields (FormName, ControlName) that consists of all form names and all control names (within that form).[code]...

How do I loop through all forms and controls in my project?

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VS 2010 - Loop Controls Through Counter?

Jun 5, 2012

I'm trying to load a file where this file has, like, 10 lines. And I want to load each line (0 to 9) to each TextBox in my app (TextBox1 until TextBox10). So, there's a way to do this with a counter?

Like this mine code (that doesn't works):
If (System.IO.File.Exists("configs.ini")) Then
Dim configs As String() = System.IO.File.ReadAllText("configs.ini").Split(vbNewLine)
Const Max As Integer = 9
Dim TextBoxes(Max) As TextBox
For i = 0 To Max
TextBoxes(i + 1).Text = configs(i)
Next
End If

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VS 2010 : Use Controls While A Loop Is Running?

Oct 4, 2011

Basically what I have are two loops, one inside the other, that will run until the given condition is met. Exactly what I want. My problem is that I want to be able to use the controls, like buttons, while a loop is going on.

I originally did not think of this until I had built this part of my program, what I want to know is if there is a way to use controls while a loop is going on or if their is an alternative.

1)I know timers can be used to meet these goals, but they did not work out as I had hoped and using two timers (1 to represent each loop) I do not believe is efficient.

2)I have considered using recursion, but have found this may not be very efficient either and am not quite sure if this will do what I want.

These loops run as long as the number the user inputted. So it could theoretically run for 100,000+ times. I am not looking for speed, but it would be good if there were a faster method that allowed me to use controls while it loops.

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VS 2010 Loop Through Controls And Change Value?

Oct 22, 2010

I want to reset programatically the values of all the labes on my form for example label1.text=1, label2.text=2 etc etc (there are 90 in total)

I came up with:

Dim i As Integer = 0
For Each objcontrol As Control In Me.Controls
If objcontrol.Name = "Label" & i Then

[Code]....

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Loop For Creating Number Of GroupBox

Dec 9, 2011

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.

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VB 2005 - Creating Compents Using For Next Loop

Nov 15, 2009

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

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Asp.net - Loop Through Controls And Change LINQ Columns?

Jun 29, 2010

I have the following code:

Dim i As Integer
For i = 1 To 20
Dim captionTextBox As TextBox = DirectCast(Me.FindControl("news_Image" +

[Code].....

Where the comment is in the code above, I need to insert the value of the textbox (text) into Linq columns. For example: articleToUpdate.news_Image1Caption, news_Image2Caption, but I need to change the number after news_ to the value of i in the for loop.

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.net - Re-Creating Dynamic Controls?

Nov 5, 2011

I have a VB.Net WinForm Program. I dynamically create panels with controls.Each panel has:

2 Labels
1 DataGridView
1 Button

Everything works fine the first time I create the panels.

Everything gets created, and everything is functional.

If I have to re-create the form, I get rid of the existing panels (and their controls) with this code:

[Code]...

When I re-create the panels, I get the panels and all of their controls except Buttons.When I step through the debugger, I see the buttons being removed, and I see them being created, but they don't appear in the panel

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.net Programmatically Creating Controls?

Jan 7, 2012

It seems that when I'm online the following code I see is used interchangeably:

Dim x As Button
Dim y As New Button()

or even

Dim z As New System.Windows.Forms.Button()

Does it matter how I declare the variable?

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Creating An Array Of Controls?

May 19, 2009

I need to be able to refer to a set of controls on a Windows form using an array, but I'm having a few difficulties.

The Windows form (WForm.vb) contains two textboxes (TextBox1 and TextBox2).

In Module1.vb I have created an array reference to the textboxes thus:

Public wf As New WForm
Public ReadOnly TB() As Control = {wf.TextBox1, wf.TextBox2}

Then, in WForm.vb I have tried to refer to the textboxes via the array:

eg.

TB(0).Text = "Change text to this"

I know that the array is referring to the textboxes, because when I hover the cursor over the line 'TB(0).Text = "Change text to this" ' in debug mode, I get the following:

(0)|{Text = "Change text to this"}
(1)|{Text = ""}

but for some reason, the text in TextBox1 on the form isn't actually being changed!
(There is obviously no problem with change the textbox's text at this point in the code, because I've tried substituting the array reference 'TB(0)' with a direct reference to the textbox 'TextBox1', and the problem disappears.

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Creating Controls At Run-time?

Jan 11, 2010

Let's say I wanted to create 3 panels(Panel1, Panel2, Panel3) at runtime, and create a label(Panel1Label, Panel2Label, Panel3Label) inside each panel. This far I know how to do it.

The problem arises in that I don't know how to write a Sub for the event of clicking one of these run-time created Panels or Labels. When I try with

Code:
Private Sub Panel3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Panel3.Click
...it tells me "Handles clause requires a WithEvents variable defined in the containing type or one of it's base types"

Also, if someone could teach me how to use some kind of array to create these controls at run-time, I'd love it, considering I may need to create up to 50 of them at some point.

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Creating Multiples Of Controls?

Mar 26, 2010

I have a program that utilized a numericupdown control. When the numeric value = 1 then it displays 1 text box on button click When I add this code

[code]...

Trying to multiply the boxes it creates by 2, it doesn't work. How do I utilize multiplication to create multiples of my new textbox control? (the error I get, just in case it is needed is "Operator '*' is not defined for types 'System.windows.forms.textbox' and 'integer')

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Accessing And Creating Variables Inside A For Loop?

Oct 15, 2011

I 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.

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Creating A Delay In A Loop Without Thread.Sleep()?

Apr 22, 2012

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].....

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Creating And Starting Threads In A Loop With Parameters

Apr 29, 2010

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]

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Draw And Paint Without Creating Infinite Loop?

Dec 10, 2010

I 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.

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Populating Dictionary - Creating Objects Within Loop?

May 16, 2010

I 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.

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