.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?


VS 2008 : Programmatically Creating Controls?

Sep 24, 2009

I have a panel that is a set size and has its Autoscroll property set to True.I am parsing text files and then adding them to the panel. I'm extracting specific lines and then adding them to labels and text boxes that are in the panel.When my app runs, it can parse anywhere from 0-10 files at a time.If there are no files to parse, I don't want any controls in the panel. I'll be creating the controls based on how many text files I have. For each text file, I'll have 3 controls.

I'll count the text files before I parse them, and insert the controls into the panel.The problem is that I don't know how to place the controls based on the location of the panel/form. I know the panel will always have a permanent spot, but I won't know if the location parameters of the panel have changed because I won't know how many controls there will be before the app parses the files.

However, I will know the size of the controls that I'm inserting.So, with all of that, is there a way to insert the controls inside of the panel, and then based on that information, insert the others?

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Add Controls To A Webpage Programmatically?

Nov 10, 2010

On a web page, I want my VB program to programatically add text, a text box for input, and two or three command buttons, maybe a checkbox.

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Programmatically Add Controls To Form?

Jul 7, 2010

I'm using the attached code to add another line ow of controls beneath an existing set (when a label is clicked). There could be quite a few rows added so I'm having to repeat the code many times using the counter (i) to keep track...

Is there a better method for doing this?

Private Sub Label10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LblExpandSearch.Click
If i = 0 Then


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Creating A .Net Project Programmatically?

Oct 3, 2010

i'm currently working on building a program that will take a MS Access database system produced by my company and create a VB.Net project with all the forms in it (obviously the code should be manually done, but to save time the forms and controls can be produced automatically).I have tried Googling and seem not to be able to find anything about this (which probably means I wasn't searching with the right keywords), I was wondering whether anyone knows any good resources on how to create the VB.Net project programmatically as I already know how to do all the access stuff.

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Creating Dsn (ODBC) Programmatically?

Nov 2, 2009

i have the following code that can create a DSN to SQL server programatically from vb.net

Imports Microsoft.Win32
Imports System.Text
Public Class Form1

Private Declare Function SQLConfigDatasource Lib "ODBCCP32.DLL" (ByVal hwndParent As Integer, ByVal fRequest As Integer, ByVal lpszDriver As String, ByVal lpszAttributes As String) As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click


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Programmatically Creating A XLM File

May 25, 2009

I have a project working on at work, it involves creating an invoice for each client and attaching that invoice to an email and sending it out. I chose to use XML for the data manipulations. I could have easily gone with a access file or a sqlCe db, but that would cause my data to be in a proprietary format; this is what i am running from. Furthermore, I have no experience with XML data and i thought here would be a good place to start.

I am reading the data for the invoices from a text file that will always be in a specific format each time it is produce. Information from this text file is stored in a generic list of a Class name Invoice.

The area where i am having the problem is where after collecting the data i now need to save it in an XML format. here is what i have so for

'Filename: cInvoice
'Written by: Curtis Jackson
'Written on: May 20, 2009


you see where i have function "writeNewInvoiceData" this is where i am stucked. I just don't know how to create this XML file.

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Programmatically Creating The DataGridViewRow?

Jun 10, 2011

I have an unbound DataGridView control where I have defined the columns at design time.Currently to add a new row I use a like this:

gridname.row.add(value1, value2, value3, value4)

This offends my sense of good programming because if I add a column to the grid or change the order of the columns then I need to alter the line above. What I want to do is to create a new datagridviewrow complete with columns and then populate the values like so:

dr.cells("FirstName").value = value1
dr.cells("LastName").value = value2
dr.cells("Address").value = value3

Just like I do when editing an existing row in the grid.I thought I could do the following:

Dim dr as New DataGridViewRow
dr = MyGrid.RowTemplate

I thought this would give me a new row complete with cells but no values. Appartently this is the wrong property. Is there a property that will give me a blank row, but with the cell names/types that have already been defined in the grid defined in the row?Yes, I know I can take an existing row and just clear the values but when this program load, there are not always existing rows.don't tell me I am going to have to add the columns myself. dr.cell.add(cell definition)

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.net - Updating Programmatically Added Controls?

May 24, 2012

I have a custom control which I add a number of to a flowlayoutpanel:

Dim drive As New WindowsControlLibrary1.UserControl1()
drive.FileSystemlable = reader.GetString(2)
drive.AbalableSpaceLable = Convert.ToInt32(reader.GetString(4) / 1024)
drive.TotalSpaceLable = Convert.ToInt32(reader.GetString(5) / 1024)
drive.SetVolumeLable = reader.GetString(3)


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Adding Controls To A Panel Programmatically?

Jul 10, 2010

I'm trying to add a group of four radio buttons to a form. There are other radio buttons so I'm grouping them by placing them on a Panel. However using the below I just get the panel added to the form without the radio buttons... Am I doing something wrong here?

Dim arrRButton(3) As RadioButton
arrRButton(0) = New RadioButton
arrRButton(1) = New RadioButton


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Programmatically Add / Remove Controls To Form?

Jan 8, 2009

How in the heck do you programmically add/Remove new controls to the form?

I'm wanting to create a form with several fields thing is, I don't know how many fields a client will need, So i want to be able to add new fields to the form with a button click and reset the form back to normal when they submit that information.

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Creating A DataGrid View Programmatically?

Jul 8, 2009

In visual basic how do you create a DataGridView Programmatically,for example i want to display 5 columns from my items table in sql server to a datagridview i just created ..

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Creating Pictureboxes Programmatically (part 2)?

Sep 7, 2011

I have the following code that attempts to create a picturebox at a set of coordinates, then move to another set of coordinates and create another one.  I have two questions, first, how do you programmatically create each picturebox with a different name than the last one.  I've attempted to address this in my code but not sure if it's right.  Second, I'm getting an error when running the code: "controls created on one thread cannot be parented to a control on another thread" - how do i get around this?


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Creating Tables In Word Programmatically?

Sep 21, 2009

I am generating tables and writing them to word on the fly. I do not know how many tables there will be each time i write the data to word and the problem I am having is the second table is written inside the first cell of my first table. If there was a third table it is put inside the first cell of my second table.Is there a way to move the cursor out of the table? I have tried creating a new range with each table also but the same thing happens.I have also tried things like tbl.Range.InsertParagraphAfter()The closest I came was using the Relocate method, but this only worked for two tables.

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Asp.net - Getting Information (on Click) That Was Used To Programmatically Generate Asp Controls?

Jul 15, 2009

How may one get information that was used to programatically generate asp controls?For example, I pulled a DataTable of user objects from the database and have organized them on a page, listing groupings such as a list of employees directly under the employer for each employer. On the page, I list each user's Username as a LinkButton. When I click one of these employees, I want to redirect the page (which is easy) and set a session variable to the selected user's UserId (which seems not so easy). How can I pull this UserId value back? These elements are not hard-coded with nice names (as they are generated in a for each loop).

Code from comment below:

Dim lnkbtnPm As New LinkButton ' is my link button. '
lnkbtnPm.Text = pmDr.Item("Username") ' where pmDr is my datarow. '
lnkbtnPm.CommandArgument = pmDr.Item("UserId")


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Forms :: Programmatically Setting Controls Visibility?

Nov 9, 2009

I have a panel with 5 labels and 5 listviews in it. By default they are hidden. At runtime I want only the ones shown that are needed. For example, if there are enough players for three tables then three tables should show up. I know how to make the controls visible, but not sure how to control how many are actually displayed. I also think I may have to do seperate loops and seperate the control types?

Private Sub Set_Tables()
Dim tables As Long
tables = Math.Ceiling(NumPlayers / NumPerTable)


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Programmatically Created Controls Show Up Intermittently?

Feb 22, 2009

Now everybody knows that creating GUIs that have lots of repeated elements that are evenly spaced by hand is for chumps; all the cool kids use loops and add them at runtime. Given that being one of the cool kids is one of my top priorities I decided to give this a go - as my current project involves creating a grid of check boxes and then chunking them together under one event handler. In my experience - an nice effective way of dealing with grid like structures (2D arrays if you will) is to use nested loops such as:

For intY = 0 To 9
For intX = 0 To 9
Dim chk As New CheckBox


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IDE :: Copy Forms With Controls To Programmatically Created Projects?

May 7, 2012

I have programmatically created a new project from a windows application. I now want to programmatically add a form to this project that already has some data bound controls on it.

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WinForms - Creating Virtual Directory Programmatically As Unprivileged User

Feb 2, 2010

I'm trying to write an application that will allow a non-administrator user to create virtual directories in IIS6. I've tried numerous different ways of impersonating a administrative account but nothing seems to work to create the virtual directory.

Here's some of what I've tried:
dim sDirPath as string = "IIS://remotehost/W3svc/1/root"
Dim de As DirectoryEntry = New DirectoryEntry()
de.Path = sDirPath
de.AuthenticationType = AuthenticationTypes.Secure
de.Username = tbxUsername.Text
[Code] .....

what is the correct way to impersonate another user in winforms application that will allow me to create the virtual directory without the user that's running the application being an administrator on the web server? I know this can be done, IIS manager allows you to use "connect as" checkbox to do it.

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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:


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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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:


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

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


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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Access Controls After Creating Them At Runtime?

Jul 1, 2007

I am having some problems adding controls at runtime, or I guess I should say accessing the controls after adding them.The application starts off with a tab control named "tabIncidents" and one tab for an incident information.  The user can click on a button to add a client.  When the button is pressed a second tab is added to "tabIncidents" named "Clients."  On the newly created "Clients" tab another tabcontrol is added named "tabClients" and we create a tab named "Client".  Multiple "Client" tabs can be created on this tabcontrol. Each "Client" tab gets a usercontrol added named "clientInformation" which has name and address textboxes. 

So basically it is ...

 TabIncidents.tabFirstTab (already exists)
 TabIncidents.Clients (new tab added at runtime if user clicks a button)
 TabIncidents.Clients.tabClients (new tabcontrol on the new tab)


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C# - Silverlight Controls For Creating A Console?

Oct 24, 2009

I'm developing a Silverlight application where I want to simulate a console. There are a lot of ways to represent this - StackPannels, grid of TextBoxes, etc - and I was wondering what the bets fit would be?

Display an 80x20 grid that scales based on parent size Be able to update an individual cell's character Be able to set a cell's forground and background color

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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:

Dim Area1_1 As New PictureBox
' Dim 48 other box...
Dim Area1_50 As New PictureBox


But it don't work. Probably because the controls is not added to the form yet...

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Creating Dynamic Button Controls?

Jan 9, 2009

I am writing an application that requires button controls to be created at run time because the amoutn of controls created depends on data retrieved from a database.

I believe I am creating the control properly but I am not capturing the click event.

Code example:

Dim myButton As Button
myButton = New Button
myButton.id = "id"


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Creating Form Controls At Runtime?

Jan 5, 2011

I want to create a Panel dynamically on the form when a button is clicked. Also labels with given TEXT are also to be created when create label button is clicked. then we should be able to print the form contents as it appears but without any buttons. We should be able to resize the panel to adjust the page size.

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Jan 21, 2012

I know how to create a control at runtime e.g.[code]Can anyone tell me how to create multiple instances using a for-next loop? e.g.[code]The part I can't work out is how to give each new button a new name... like button1, button2 etc

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Nov 18, 2011

I am trying to get ToolTips for disabled controls (IE:  checkbox) and I found the below code:

Imports System.ComponentModel
''' <summary>
''' Custom ToolTip Component that is based on a normal tooltip component but tracks tips


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Dynamicly Creating Controls At Runtime

Dec 23, 2009


I need the picture to have a tag value so i can use them later.

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Dec 2, 2009

I am new to VB 2008 having spent most of my time in 2003. What is the recommendation for the best place to get a primer on creating custom controls in VB.NET.  I prefer to use VB directly and not the WPF.

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Stop Creating Controls If It Already Exists

Jun 24, 2012

I am Creating a sales voucher.i have 2 labels Namely lblHilight0 and lblCount0 and also 6 textbox namely txtNameOfItem0, txtActualQuantity0, txt BilledQuantity0, txtRate0, txtAmount0 and txtRemarks0..All these Controls are in a Panel named PanelItems..The AutoScroll Property of PanelItems is set to True..when any key is pressed in txtremarks0 the new objects are created as follows [code]when i scroll down and up and then if i press a key on txtremarks(i) then it leaves spaces..

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Dec 5, 2011

I'm creating a control. But I don't understand how can I put it in my toolbox?

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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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VS 2010 Creating And Removing Controls?

Sep 2, 2010

I'm making quite the complex program, and while I try to figure out some more advanced methods that work better for what I'm trying to do, I'd like to learn how to do this (which is a bit of a roundabout method to what I've been trying). I'm wondering, how can I programatically create and remove objects? For example, I have webbrowser1. I want to remove it and create another webbrowser that I will also name webbrowser1. (therefore, the instance of the original must be removed)

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VS 2010 Creating Custom Controls?

Aug 23, 2010

I got this whole thing pretty well down (it's actually quite easy), but I've seen custom controls created where you can click that little arrow on the top-right corner and add things or change things about it.

How exactly is this done? I'd Google it (which is why you don't see me post here too often) but I really don't know how to describe it.

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Creating And Coding Of Events Of Dynamic Controls

Apr 5, 2009

I had been searching as to how I could create an array of controls dynamically, and after some searching found some helpful code as shown below [code]This way in the above code "structureComboBoxes" will have an array of comboBoxes (VB6.0 was way easy to get this crap done!! I guess its cleaner here)Now my next problem is How do i code for events of each of these combo boxes?

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VS 2005 - Creating Array Of Custom Controls?

Nov 6, 2009

I am creating an array of customer controls by doing the following:
Dim CtlLosArray(150) As Control

Then I'm setting up the first control in the array like this:
CtlLosArray(1) = New ShieldLOSInfobox
CtlLosArray(1).Location = New Point(0, 0)
CtlLosArray(1).Visible = True
CtlLosArray(1).Name = "Label1"

Now on this custom control I have a panel and a few text boxes and as you can see I may be adding about 150 of these custom controls. What I am wanting to do is to be able to access that control then the item on that control based on the array. Something like the following:
CtlLosArray(1).Controls.Item(Panel1).backcolor = Color.Yellow
But the above does not work. How I can access a specific item on the customer control within the array?

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Sep 14, 2010

Is it possible to create instances of controls on a form ? Of course I mean visually , not just by code. After all, these languages define themselves as "Visual" so they should provide that possibility. It is important for the instances to be visible during design time because otherwise we could only guess where those controls might "land". Nevertheless , I have the feeling this is not possible in VB .NET but still I thought I should ask first ...

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