Picturebox Collections - Avoid Adding The Controls In Code
Nov 19, 2011
I have forms with multiple pictureboxes, labels, etc. They are all numbered, for example, pb_QL01 to pb_QL99, or lb_Main01 to lb_Main29. In the old days, I could reference the properties of these in code using, for example, Me.Controls(a).Image where 'a' was the string of the name of the object (e.g. "pb_QL23"). So, I get it that you can't do this anymore in QB2008 (too bad). I need to set the properties in loops. [Code]
but it takes a long time to cycle through all of my controls, and there are some properties that will not work (like mycontrol.image), image not an option. So, is there an easy way to get this done? I don't want to add the controls in code, since they already exist on the form. If I have to use collections (which I'd prefer not to if there is an analogous way to the old way of passing the name of the control in code with a string, but if I need to, how do I get this to work.
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Dec 3, 2009
How to avoid aiding the development of malicious code I see an uncomfortable number of questions asking for info that could easily be put to malicious use. You can probe the OP to discover their intent, and you get replies that come in one of two flavors.
I have come to realize that trying to discover their intent is a waste time. Not because of the reactions, but their intent is really irrelevant to the matter at hand. Security. Posting code of any nature in a public forum that can be abused for malicious purposes is outright reckless. I wish could provide the help they request, but I don't know most of those programming tricks anyway. I would discourage anyone from publicly posting code that could be perverted no matter what the person asking for it claims. Their claims take a back seat to common sense. Anyone can read the post, people. Don't post anything that could become part of someone's malicious software in public.
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Jun 18, 2009
I've got a form with a TabControl. PictureBoxes (containing thumbnails) are added to each TabPage thru a loop. A click event Handler is added for each PictureBox. When a PictureBox is clicked, a new form is created thru code and a PictureBox is added to it that shows the pictures enlarged. What I need is to add another Handler to the PictureBox in the code-generated form so that I can rotate the pictures because some of them (photographs) were taken with the camera at 90 degree angles from vertical. I've tried to come up with a solution but I always run into the problem of the PictureBox on the code-generated form needing to be declared WithEvents before a Handler can be added.
Code for adding PictureBoxes to TabControl:
'Variable p declared public withevents at class level
p = New PictureBox
img = Image.FromFile(Path.GetFullPath(picfile))
[Code].....
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Aug 14, 2011
I am trying to create and remove a series of controls programatically. The user will have a numeric updown to pick a number. The program will then create a bunch of duplicate controls based on whatever number they pick on the fly.
Public Class Form1
Private Sub NumericUpDown1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles numberDebts.ValueChanged[code].....
The creation part works just fine.As the number is toggled upward a new label is created.However whenever I remove labels it acts very strangely.The first time I bring it down it works just fine. Then the next 3 do nothing but the 4th removes another line.I can also toggle back and forth and it will eventually remove the label. So for example.
Starts with 1 selected - 1 label visible (1)
Change to 2 - 2 labels visible (1-2)
Change to 3 - 3 labels visible (1-3)[code]....
If I toggle back and forth between 2 and 3 eventually label 4 will go away.I want only 1- my numeric up down value to be displayed and have everything else after that removed.
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Apr 28, 2010
What I am trying to do is create a form in code that runs while the BackGround worker is running.I created a form the normal way with a label and progress bar but I want to update the label with what is going on in the BackGround Worker.Doing it the standard way isn't updating the label on the form.So my next idea is to create a form in code which I have done, but now I can't remember how to add controls to that form at runtime.Here is the code I have so far.[code]So from here I have tried the CreateControl() and the Controls.Add() and neither one is working for me.
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Mar 27, 2012
In the early generations of VB.NET visual studio, I used to see an automatically generated region named "Windows Form Designer generated code" that includes the code that generates the controls at the surface of a form. But what happened with VS 2008, I can't see that region any more ? Where are the lines of code that are automatically generated that create controls and set there properties ????? Luai Alrantisi, BSc in Computer Engineering, University of Ottawa 2007, Canada. IT Manager of MTN Mobile Telecom.
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May 13, 2009
i have a list of items in a listbox:-
A
B
C
and i have a button that adds these items by selecting them to a datagrid how can i avoid adding A or B or C twice to the datagrid?
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Mar 15, 2012
how can i avoid data duplicate in the database?i mean if i add in the fields that has been already save it will still save.i don't know how to query or filter not to add the same info.i have the code below but it still save if i input same as already in the database.[code]i want is to query first before it add the data to avoid same info.
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Sep 15, 2009
I'm searching for a solution to resize image(jpg) being passed in from an array in Picturebox Control on .NETCF 2.0 in VB.NET without resorting to using the opennetcf library, is it possible?
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Jan 27, 2010
when adding picture to dynamic picturebox from my.resources in .dll a duplicate semi functional picturebox is added too, behind the picturebox i intended to add. has anyone seen this happening before or can provide any insight into this?
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Nov 7, 2010
I'm trying to block specific websites by adding them to a system.collections.specialized.stringcollection in my.settings, where i use
Private
Function
GetBrowser() As
[code]....
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Apr 5, 2011
I have a dropdownlist with a list of options which is subject to change (e.g. 'active users'). Another data source may include historical data, but I wish to use the 'active users' dropdownlist against it. This means an ArgumentOutOfRangeException will be thrown so I want to catch that, and insert the required entry into the dropdownlist on the fly.
I've seen a few suggestions that point towards overriding the ondatabinding event within the dropdownlist, I've managed to do this insofar as I can create a static listitem for example "Value does not exist" and bypass the exception. However I wish rather than "Value does not exist" so show the actual value which we were attempting to find in the ddl.
ondatabinding is passed a standard EventArgs item which doesn't offer much to go on, I can see there is a DataListItemEventArgs class - is this in any way associated with a dropdownlist? I tried directcast on the EventArgs but that didn't work.
So is there any way - within ondatabinding - of finding out the value we're attempting to set on the dll, which causes the ArgumentOutOfRangeException?
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Sep 14, 2009
A open conversation thread on this topic exists at[url]...
I would like to ask our community to take a brief moment to consider the outcome of answering a question before doing so. Sometimes a question can lead down a path to examples of how to create malware applications, and that is something we want to try to avoid. There are a few key things we can watch out for which would often indicates a question about malicious code intent.
First, watch for requests to do network communications that violate one or more RFC documents (e.g. How do I spoof my IP address?). Second, watch for requests on automating other websites - a quick check of the other site's AUP or TOU will typically tell you if the automation is permitted. Third, watch for requests that appear to want to harvest data from the web, without following the typical procedures for a web crawler (bot).[code]...
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Sep 21, 2011
I'm having a problem with this code in the highlighted line(*); getting the error in the heading.
Dim htmlarraylist As New List(Of iTextSharp.text.IElement)
htmlarraylist = *HTMLWorker.ParseToList(New StreamReader(tempFile), New StyleSheet())*
[Code].....
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Nov 15, 2010
I know when I draw to the form and add controls I get a flicker effect.If I draw to a picturebox on the form and add controls will the picturebox flicker?
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Mar 1, 2012
In VB6 I could embed a panel or picturebox containing controls or images within an outer panel or picturebox. If I moved the outer control then the embedded panel would move with the outer panel and stay in the same relative position, which is what I require. This doesn't seem to happen in VB.NET, the internal panel stays fixed in its location, even if I have pasted this panel within the outer container. Is there are trick to this or do I have to code to get the internal panel to move with the outer one? How does an internal container remain embedded within an outer one?
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Jun 28, 2010
I am trying to minimize my code writing. I have DBLayer base class that selects, inserts, updates and deletes records from database. I need only fieldlist and table name from each derived classes to perform the actions. I have defined static tablename, fieldnames in derived class. Currently I am defining next static functions in derived class for GeneralSelect [which selects all records], GeneralInsert[Which inserts a records], GeneralUpdate[Which updates records as per given id] and GeneralDelete[Which deletes a record of the given id]. The parameter and all functioning are same just the differece is the table name and fieldnames.
One DBLayer Class that performs database actions
Class DBLayer
Public shared function Query(byval SQL as string) as dataTable
[code]....
... same goes for all other table objects... If I have 20 database tables i have to write getdata method in all 20 class changing only the tablename so i would like to get ride of it. So in order to get ride of it what do i need to do?
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Apr 7, 2012
i have this line of code to catch an exception if a letter is inputed, or if it is out of rang as a number, but I have added WHEN to avoid catching numberical data. Now how can I use an exception error to use it before my case statement in order to avoid running the code twice, cause once the case codes has been through it will run a clear txtbox which is already taken care by the try catch, don`t if thats clear for you but i understand it. here is the code in parts...
Try
'Integer Levels: intLvls is egual to the assigned text box, the first one from
'the top, this line of code allow the user input to be captured into a variable.
VS 2008 Remember Textbox Text when Form reopens
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Feb 12, 2011
This code:
vb Dim s As String = strContents '<a global variable) Dim currentPos As Int64 = 0 Dim endPos As Int64 = strContents.Length - 1 '// A dictionary, used to count the frequencies Dim characterCounter As New Dictionary(Of [String], Int64)() While currentPos <> endPos '//
[CODE]...
Gives this error: Value of type 'System.Collections.Generic.KeyValuePair(Of String, Long)' cannot be converted to 'System.Collections.DictionaryEntry'.
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Jul 28, 2009
I've got a set of controls in a line inside"FollowTableLayoutPanel1", contained within "TableLayoutPanel2".I have them resizing according to the position of the mouse cursor; the closer the mouse cursor is to the vertical centre of the control, the larger the control is. Because FollowTableLayoutPanel1 has its anchor property set to "Top", it recentres itself in TableLayoutPanel2.It is possible for the recentring of FollowTableLayoutPanel1 to move a control one pixel further away from the mouse pointer, which causes the control to shrink, which causes FollowTableLayoutPanel1 to recentre, placing the control closer to the mouse pointer, which causes the control to grow,which causes FollowTableLayoutPanel1 to recentre, which moves the control further away from the mouse cursor, etc., etc., etc.The end result is that the whole setup judders and wobbles, constantly resizing.Full example code is provided below,and can be pasted directly into Form1 of a new project. Positioning the mouse cursor to correctly show the problem is left as an exercise for the reader :
Public Class Form1
Private Sub myInitializeComponent()
Me.components = New System.ComponentModel.Container
Me.TableLayoutPanel2 = New System.Windows.Forms.TableLayoutPanel[code].....
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Feb 6, 2011
I am writing a code-generator that will need to output some miniscule portions of VB.NET code, and since this is a code generator that will add user-provider code, I'd like to try to avoid type name conflicts with types or names in the user-provided code.
In C#, I can prefix types with global:: to make sure they're matched from the global type namespace hierarchy, rather than some local name, but is there a similar system for VB.NET? ie. this: global::System.String
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Feb 5, 2011
[code]...
What's really the point in using the former?It's hard to use linq if I used the former. I have to convert that to an array first which is difficult because there is no (asarray) function.I think I would change all of my code that's using System.
Collections.Specialized.StringCollection to System.Collections.Generic.List(Of String)
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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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Dec 10, 2011
[code] If How can i add an event to the picturebox that intersects with picturebox1 without adding it to all the other pictureboxes?
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Nov 30, 2010
1) Add a TabControl.
2) You could change it DockStyle to fill the Form.
3) Add TabPages to the TabControl ( as many as you want ).
4) Add whatever controls to the relevant TabPage .
E.G:>>
Public Class Form1
'Create a NEW TabControl.>>
Private WithEvents tc As New TabControl
[code].....
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Jan 7, 2010
I have a picturebox with controls on it. I wanna save it as a pic with controls. I have seen a getimageofcontrol() func. on vbforums earlier that does exactly this. But I am not able to find it now...
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Nov 13, 2010
I've tried using the method in the link below, but unfortunately this only works with .exe files. I want to be able to display icons from all filetypes in picturebox's.
[URL]
So I was wondering if maybe there's a quick edit I can do in the method above to make it work, or even a completely different way of doing it?
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Feb 17, 2009
How can we embed images (for picturebox controls) within an application so that a specifiic directory does not have to be accessed in order to display the image?
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Dec 31, 2011
I have multiple picturebox controls in my form. Both of them contain an image with a transparent background. I want them to be on top of each other. I've already set their BackColor property to Transparent, but when I place one on top of the other one, the following happens: [URL]. How can I make them transparent while they are on top of each other?
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Nov 15, 2010
I have a question about serializing a Picturebox and it's child controls. I have a picturebox on my main form where a user can put new Picture boxes in.To a add a new Picturebox I say: Pictureboxmain.controls.add(Picturebox)But now I want to serialize this in a stream of bytes. I know that you can serialize an Arraylist as followed:[code]But is the same possible with a collection of controls?So now I tried this assuming the same method can be used with a control collection:[code]
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