Adding Arbitrary Number Of Controls In Loop At Runtime

Jul 12, 2009

How do you add an arbitrary number of controls to a form at run time? With indexed controls I could define the 'seed' control at design time and reference 'clones' of the 'seed' control at run time via the index. Now I must declare each additional instance of the control at run time then set each individual property that differs from the default for that control for each instance. Then I must add the newly declared control to the appropriate container controls collection. I'd like to do this in a loop but how can I get away from using a fixed control name in the declaration:

Dim controlname As New Control

I can't use a string that I can manipulate the contents of for controlname because it sees it as a double declaration. I can't use an array such as Control(index) for controlname. Dim Control(maxindex) As New Control doesn't work. Dim Control(maxindex) As Control works but any assignment based on this such as Control(indexvalue).Name = "ControlName" fails. It didn't address the issue of handling the declaration of new controls in a loop with some kind of variable name for the control.

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Adding Controls At Runtime

Jun 1, 2009

is there a tutorial (i looked, couldn't find) on adding controls at runtime?

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Adding Controls On Runtime?

Jan 1, 2010

I've created a code that will add a control on runtime.

Sub Button_AddNewGradeEquivalent_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button_AddNewGradeEquivalent.Click

Dim newGradeRepresentation As New TextBox
Dim newGradeCondition As New ComboBox
Dim newGradePercentage As New TextBox
TextBoxItems += 1

[Code]...

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IDE :: Adding Controls At Runtime / Where Goes App?

May 18, 2009

In the helpfiles of Visual Studio 2008 I read control arrays are no longer supported. There is an example for the new situation but then you need to hard code the names of all the controls beforehand.I do not know how many controls I need, could be one or 5000 (think simple image browser). Is it still possible to create something like that or should I change to a different programming language like Phyton? At the moment I work around it by using a browser control and then manipulate the <img> tags but I'm puzzeld as to why this functionality was removed and if there's a solution to the problem.Another thing I don't understand is where the app goes when it's installed with 'Click once'. It dissappears completely, doesn't show up in 'Program Files', can not be found by the search function but it *is* somewhere because you can start it form the Start menu. However, I use data which is in a subfolder of the program folder, which I nor my program can find any more after the app is installed. The program runs but it can't find any place to put/get its data so in the end it doesn't work.

I work around it by *not* installing the program but have people just run it after unpacking the downloaded folder. This works great but I wonder how long this will be the case until Microsoft disables this possibility? I have no idea why they would, but I also have no idea why they did remove the functionality I mentioned above. I already changed to PHP and MySQL because I had to throw away my carefully built W2K+MSAccess image database a few years ago and after installing Vista Visual Studio 2005 was a goner. OK, I upgraded but then no control arrays any more and now they hide the apps when you install them? Why on earth would they do that?

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Adding Controls At Runtime Or Through The Designer?

Dec 6, 2011

I am very interested to see the answer as I would like to know the significant differences (if any) of generally using one more than the other. In a few days, I will be starting my Java programming class to familiarize myself with the language.I do know that Java uses objects.My question/discussion is not necessarily related to .NET (although in a way, it is); my question is more about what is a better practice and why.Is it more proper to declare buttons and such through runtime rather than designer? Is it just more work typing everything? Or does build and run much faster?

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Adding Controls To Panel In Runtime?

Jun 21, 2012

Code:
Private Sub btnMonSet_Click(sender As System.Object, e As System.EventArgs) Handles btnMonSet.Click
My.Settings.tweetMon = tbMon.Text
If tbddOccurrence.Text = "Just Once" Then
If cbToday1.Checked = True Then
lblPanel.LblScheduledTweet1.whenDate = Date.Today
[Code] .....

The goal of this code is to add a control to a panel in runtime. This MUST be done in runtime for the purpose I intend. The problem is that, when I add a second control, the first one disappears.

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VS 2010 Adding Controls At Runtime

Apr 29, 2011

I need a little help with variable scope ( I think that is the right term) As I understand it, the follow could be used to add a button to my form at runtime ...

[Code]...

I want a method that creates a new button with the object name that I pass to the method.

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Adding Controls At Runtime To Child Form?

Jan 27, 2010

Updating a VB6 prog in VS2005 on Windows 7. The prog has an MDI + child forms and there are a number of content types, with varying numbers of controls being set up and positioned from setup files.On forms which are not child forms I can easily add controls at run time like this:

Dim lab As New Label
With lab
.Left = 0 : .Top = 0
.Width = 800 : .Height = 800

[code]....

This doesn't work on a child form, no label is visible. Can't see any obvious problem in quickwatch.

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Adding Controls To Child Form At Runtime?

Jan 27, 2010

Updating a VB6 prog in VS2005 on Windows 7. The prog has an MDI + child forms and there are a number of content types, with varying numbers of controls being set up and positioned from setup files.On forms which are not child forms I can easily add controls at run time like this:

Dim lab As New Label
With lab
.Left = 0 : .Top = 0

[code]....

This doesn't work on a child form, no label is visible. Can't see any obvious problem in quickwatch. Is there some known reason for this or do I just have a wierd bug?

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Dynamically Adding Controls To Tabpage At Runtime?

Jun 6, 2011

I'm having a lot of trouble trying to add a new control to a dynamically created TabPage at run time, I have viewed many threads with similar help requests and cant seem to make the codes work!

Here's what I've got:

Dim albumscount As Xml.XmlNodeList
albumscount = config_doc.SelectNodes("component/config/menu/album")
i = albumscount.Count - 1
Dim albumtitle As Xml.XmlNode

[code].....

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Forms :: Adding And Removing Controls At Runtime

Jan 4, 2012

I am working with my project and I have difficulties in my program. This is the set-up: I put a textbox1 and a button1 in the form, textbox1 is for the property of the label text to be add
when I click the button1 I have another textbox, label and a button,I want the added button to remove the textbox, label and if possible the button itself, is there a way to delete a control by the added button?

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VS 2008 Adding Controls ContextMenuStrip At Runtime?

Jan 15, 2012

im trying to work with adding controls in runtime. Anyways ive added a ContextMenuStrip control in runtime and added a item called "Display". The ContextMenuStrip is also added to textbox's that are also added in runtime and when i right click a textbox i see the "Display" but i want it to do "msgbox(textbox.text)" when i click "Display".

[Code]...

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WinForms - Dynamically Adding Controls At Runtime

Oct 21, 2009

I have a WinForms application that I need to dynamically add controls to at runtime. I searched for this and I was initially led to the TableLayoutPanel (TLP).

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Adding Arbitrary Labels And TextBoxes At Run Time?

Sep 28, 2011

The three labels "Floor" "Typ." "HeadsI can insert once fine but multiple times only the third instance is written to the form.I have 2 textboxes to test that the Label.Name is changed but I can't make the Label.text stand for each label. I am certain this will occur too with the textboxes.I also need to keep track of these boxes for further use with the program.

Public Class Form1
Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged

[code]....

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Declare With An Arbitrary Number Of Parameters?

Jan 19, 2009

Is it possible to have a class, sub or function declared with an arbitrary number of parameters? And those parameters be a type, like generics? For example

vb.net
Public Class Test (Of T1, (Of T2))'The (Of T2) means that after the first parameter can be an arbitrary number of parameters

[Code]....

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Adding Dropdown List At Runtime And Access Control And Events At Runtime?

Dec 20, 2010

I have created multiple dropdown list at runtime and populated with data. I also have added an eventhandler to determine the selected value of the drop down list.

The code is as follows :
Dim tbl As New Table()
tbl.EnableViewState = "true"

[code].....

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Getting Loop Through Adding Each Result Without A MessageBox Stop In Each Loop?

May 3, 2010

I have written a function that gets the alexa ranking of a given url, now this function works perfectly but I want to loop through a ListView of urls and grab the alexa rank of each item (url) with my function.The code works great if I put a MessageBox in the loop to test that the function is returning a value but when I remove the MessageBox the loop does not work.I need it to loop through adding each result without a MessageBox stop in each loop.

vb
For Each Item In ListView1.Items
Dim result As Integer
result = GetAlexaRank(Item.Text)

[code].....

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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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Manage A Large Number Of Similar Controls In A User Interface (such As Button Or TextBox Controls)

Aug 23, 2011

There is newer code in a follow up post. I suggest using the code in the later post rather than the code in this one. You can still read this post though. When designing a user interface, one should be conscious of how many individual controls are required to implement the functionality. In some cases an initial design may begin with many buttons or textboxes (for example) but then further review of
the actual required functionality allows for a reduction in the number of unique controls.

But other times, there isn't a better way (which will still make sense to the user of the application) then to have a series of many repeated controls. So in the cases where one can be certain that the best UI implementation for an application will require the use of multiple copies of a given control, then it often becomes necessary to maintain some method of managing all of those controls at various points
throughout the application. Doing so typically requires that one build up some collection of controls which can then be accessed by index in order to work with any given control; but this can lead to a lot of clutter in the code file which handles these control's events. For instance there will be some kind of collection declaration, some recursive routine to find all of the controls of interest, and then any number of event handler methods with long lists of Handles clauses, or additional code loops to wire up the event handling for each control.

Purpose Since most of this functionality could be considered a requirement regardless of the type of control being managed, or its required functionality, it may make sense to wrap all of the control management functionality into a single class. And since our first requirement is a collection of controls, then a base collection class could be the perfect starting point for our control manager. There are a number of existing thread around this topic, with some recent (at the time of this writing) ones being:[URL]..In this, and related, threads I have posted examples of a simple TextBoxManager and ButtonManager control. But again, with so much similar functionality required regardless of the control being managed, it would be technically possible to create a generic ControlManager(Of T As Control) class which can manage any type of control.

[Code]...

So in summary, one can facilitate managing a large number of user interface controls by building a "control manager" class which both encapsulates the list of control instances, and deals with adding and removing defined event handlers for every control it manages. The generic control manager class itself can be inherited and extended into a more specific class on a per-application basis in order to provide more application-specific functionality. Reed Kimble - "When you do things right, people won't be sure you've done anything at all"

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Adding Number In A Listbox Then Multiplying By A Number Using One Button?

Oct 14, 2011

adding all the numbers in a list box then multiplying it by a %.theres one listbox and two buttons, and two textboxes.i've completed everything but this and can't fibd it in my book. I just looking for pointers. this is what i have which i know isn't right

Dim sum, cost As Double
sum =
cost = sum * 0.06
lstbox.Items.Clear()
lstbox.Items.Add("Total Commission =" & cost & ".")

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VS 2010 Adding Whole Numbers Between A Number And A Number

Feb 3, 2011

VS 2010 Adding whole numbers between a number and a number

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VB - Form With Fairly Large Number Of Controls - After Curtain Number Of Buttons - Stops Responding To More Radio Buttons

Jan 17, 2011

My VB application is behaving strangley. I have form with fairly large number of controls. I am using case against radio buttons. after curtain number of buttons, it stops responding to more radio buttons.

Then I tried to split controls in to 2 form but now my form.showdialog() too now working properly. It takes new from names but show the old form when running.

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IDE :: Change Value Of Variable In Loop During Runtime?

Jan 26, 2009

I'm multiplying X*Y*Z in a loop of 200 interations Y is declared as a constant. A timer can cause the loop to pause for 10 seconds.

During this 10 sexond pause I would like to change the value of Y. It needs to be changed only for this run, not a permanent change which can be done in the declaration.

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Add Controls AND Code At Runtime

Jan 15, 2012

"add controls at runtime" how to add code to the controls. kinda useless with no code, ehh? all results only told me how to add the control, that's it. well, this result is different. i will teach you firstly how to add controls at runtime, then how to apply code to them at runtime

Firstly, add the controls:

[CODE]..............

Now run it. do you have a button on the form? if yes, excellent. if not, you made a mistake. try again now how to add code? you may have noticed that when you double click on any control, it says private sub button1_click(blah, blah, blah) Handles button1.click where it says handles button1.click is what determines when the code executes under what event for what control (in this case the click event for the button1). this won't work when adding code at runtime. did you notice in the above example i added a with event, and addHandler? this is what creates the handler (same as Handles button1.click)

Now we add the code for the runtime control

[CODE].........

Above, the addressOf button1_click tells the program to execute the sub button1_click when the button is clicked on (as determined by .click) but i know what you're thinking! your thinking "why would we even BOTHER doing this at runtime? isn't it easier to do it at design-time in the first place?" yes it is, providing your not writing a plugin. plugins are code based, not GUI (also reffered to as WYSIWYG). to update existing forms using plugins, you need to use this method.

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Add Controls At Runtime To Form?

Mar 29, 2012

I have created a form Dynamically at run time using this below code but how can i add controls to it.

Dim NewFm as Form
NewFm.ShowDialog()

how can i add treeview to this form and populate with data during runtime?

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Controls Change Look At Runtime?

Mar 10, 2010

I did something that when I now load my program(VB 2008), my controls; combo boxes, buttons, progress bar, etc. look like they are from VB 2005 or like VBA buttons, not the rounded edge buttons of 2008.

They look like vb 2008 controls while I am in design view, but then they change their style when I run the program..

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Controls In Datagridview At Runtime

Feb 12, 2009

I have a situation where i'm populating records in datagridview from a table where first column is the ParameterName, Second Column is ParameterValue and third column is ParameterType.When i click on second column in any row as per the records, it should show the control type in this cell as per the third column parameterType.[code]

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Create Controls In Runtime?

Jun 21, 2010

I want to create controls in runtime and attach them to an already connected database..

the controls must vary e.g.Array of Strings can be used.

how to place these controls on a panel in a orderly fashion.

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Generating Controls At Runtime

Apr 29, 2010

I was wondering if there was a way to dispose a control that i generated at runtime in a diffrent block of code, The reason why i can't dispose of the control in the same block of code is that the controls settings depend on what the user imputs. For example if i generate the control on a timer tick the code would look like this,

[Code]...

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