Recommended Text For The Creation Of Custom Controls?

May 1, 2009

I was wondering if there is a recommended text for the creation of custom controls?  I know a few years ago this book was out: Developing Microsoft .NET Controls with Microsoft Visual Basic .NET (Pro Developer)

It was published in 2003 I think.  I have a great deal of experience in VB but not in actual control development, so I don't need a primer on classes and properties and the like.  Wondering if this would still be worth it?  I never dove into this part of VB and .NET before.

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Creation Of Controls In Run-time?

Jun 5, 2011

I'm doing INVENTORY project...

front-end : vb.net
back-end : Access

I'm having PURCHASE, SALES tables...

In sales form, i need to create CONTROLS during RUN-TIME...

i.e, when we gone for shopping to a DEPARTMENT store, we buy LOT things... they will give us only one BILL... when they are entering BILL, they will enter only CODE of the product, all the other particulars will be loaded automatically... if v buy 10 items, there will be 10 items in BILL... if it s 15, 15 in bill...

i need to create like this only...

i.e in SALES form, CODE, CATEGORY, BRAND, S.P, DATE, QUANTITY, TOTAL etc., are available... when i click a BUTTON say NEXT, the controls specified(CODE, CATEGORY, BRAND, S.P, DATE, QUANTITY, TOTAL) has to be created automatically, in same size,and in same COLUMN (in form)(i.e CODE is a COMBO BOX, WHEN I PRESS NEXT another COMBO BOX has to be created in same COLUMN), whenever i press the NEXT...

and also, when i press SAVE BUTTON, ALL THE DETAILS HAVE TO BE STORED IN DATABASE...

I know the concept of CONTROL ARRAY... but i don't know how to implement in vb.net...

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Apr 11, 2007

does anyone know where i can get visual basic 5.0 control creations edition???

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Loading Text Files Into Oracle Using Creation Date?

Apr 12, 2011

I've written a loading program that writes text files to our database. The text files are dumped by another system every 2 hours onto on a shared network drive at my work. Here's the problem though - the files don't have a date/time stamp within them. I've been getting the date for each file from the creation date. That works okay, but when I've written loading programs in the past, I like to move the loaded files into a folder called "Loaded Files". That way, I can quickly see visually how many files I've loaded vs how many have not be loaded.

The problem this time, is that if I were to move the file into another folder, the creation date changes...a lesson I learned when I copied all of the files into a directory on my C: for testing. They all had the same date/time stamp!My question is, what's the best way to handle this? I don't want to move the files after loading them if it alters their creation date. I mean, what if I have to go back and load one for some reason, the date will be lost forever. I also don't want to write something into the software that has to check a file each time before loading it to the database.

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Create A Custom Messagebox, With Varying Number Of Buttons With Custom .Text Descriptions?

Feb 6, 2009

This is what I would like to achieve:To create a custom messagebox, with varying number of buttons with custom .Text descriptions, and other features. I intended to have a property array that would be redim-ed and have values (.Text values) set by the calling class:

[code]...

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Mar 27, 2010

i want to control my tab pages with custom buttons...now i want to hide my tabs from tab controls...

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Aug 1, 2010

I want to know how to add custom controls to vb.net.

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.NET For Each Exception On Custom Controls?

Dec 9, 2011

in VB.NET i have 2 custom controls, one is a TextBox and second one is a ComboBox.These have custom values like Bool _IsHidden and are added on runtime to a form.Now, at some point in the code I want to check if the _IsHidden is set to True or False and display that information. Since the user can edit this values when creating the control these are not set on creation.

So what I tried is:(all of this is on MDI Forms)

For Each frm as CustomForm in Main.MdiChildren If frm.MyName = calledBy Then 'this part is just to know which form called the form to create the object For Each cntrl as CustomTextBox in frm.Controls'DO Something
Next End if Next

Now.. if the first control is a custom ComboBox it thorws an error since it sees that it does not match the custom TextBox control..how do i get around this? By my understanding it should just go through all of the controls on the said form and just check those who match CustomTextBox control ?

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Arguments For Custom Controls?

Nov 24, 2011

I've created custom buttons in a .dll and they work fine, so I thought I'd have a go at creating my own sort of listbox to replace the standard one in my applications. It's basically a panel with a few labels and a button (eliminating the need to select an item in standard listbox then click a seperate button). I want to add these panels to a panel on a form, at run-time, based on rows in a db.

If I try adding any arguments in the New() section of the class file it won't let me use the panel in my toolbox. Is there a way to pass arguments to custom controls, I need a new custom panel for each row in a db so need to pass an id to it to specify records; or even load the records in my application and create a new panel for each record, using info passed to it to fill in the labels on it. Or can I create the panel at run-time and refer to labels within the custom controls, setting their .text properties that way?

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How To Create Custom UI / Controls

Mar 19, 2011

I would like to expand my knowledge of VB.NET and was looking at creating custom user interfaces or custom controls. The type of things I am thinking of is: [URL]s. How are those controls created? I imagine it involves using the existing controls in Visual Studio as a starting point, and altering them to suit your design?

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Resizing And Custom Controls?

Dec 10, 2010

I'm not going to post my code for my transparentlistbox class, but here is a link to it.It's been working fine as is, until early this morning when I tried to set a different size.[URl]..For the longest time I placed a normal listbox control on a form and resized that, setting a new public variable of transparentlistbox to the same size/location as the original listbox, setting the visibility of the original to false, and adding the transparentlistbox to the form (me.controls.add).It looked like this:

[Code]...

Now, since I've moved some buttons around on my main form, I resized the original listbox control to be wider (same height though). When I tested, the transparentlistbox (code didn't change still set to original listbox size/location), the size was that of what I had the original listbox set to, before resizing?

So, I commented out all of the custom drawing/paint events/etc I could find for the transparentlistbox and tested, still stuck to the original size. I stepped line by line debugging and verified that transparentlistbox1.size=listbox1.size indeed matched the new resized size (but didn't actually resize)?

Last I did was comment out the transparentlistbox.visible and put back the listbox1.visible and listbox1 does indeed show with the new resized size? I'm not quite sure what to test next?

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Use SVG In .net To Draw Custom Controls?

Nov 3, 2009

Is there a way to use SVG in vb.net to draw custom controls? Or any other way?

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Adding Controls To A Custom Control

Jun 19, 2012

Is it possible to have a custom control (inherits from Control) and add sub-controls to it (like, a label for example)? Basically I want a composite control. I know controls can contain other controls, but if I try to add a control to MyBase.Controls, this doesn't work because that's readonly.

[Code]...

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Oct 14, 2011

i need to create custom controls for my apps so how can I do that? Do I need a special software to do that?

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Jan 16, 2012

inherit from two classes in VB.net?We are developing Custom User Controls that inherits from say System.Web.UI.WebControls.Label. We are planning on implementing a bunch of these controls but they will share mostly the same additional properties. We are hopeful about centralising these properties.I have looked into interfaces but it seems they only 'contract' properties you need to implement.

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Custom Controls Disposing & Memory?

Apr 14, 2010

I've been working on a few large custom controls, and I noticed that when I use them, my memory starts ballooning.  If I add a control at runtime, it increases the memory, but when I remove the control, it decreases less than it increased.  However, it would stop balooning at some higher value.  So if go back in forth between pages (which adds and removes the control), the memory would look something like this:

1,000K|5,000K|4,000K|9,000K|8,000K... 20,000K|25,000K|21,000K|25,000K|21,000K|25,000K... etc I know it takes a while for the GC to run, but the memory would stay consistantly high for long periods of time.

I tried writing a Closing routine, where when I called it, the control looped trhough its children and disposed all the internal controls, which seemed to help a little, but the memory after running the control and disposing was still much higher than before running the control. I also use custom event addhandlers.  Should I remove all these as well.  It would be nice if I received a little guidance on this.

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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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Nov 3, 2011

I have a custom control I'm creating. When I click on it, it draws a dotted border and puts some nubs on it for resizing. This all works perfectly. Now I want it so when I click off of it, it deselects. I already have a variable to set up if it's selected or not and subs to draw/clear it. I just have to be able to detect when something else is selected or it gets clicked off of.

What I've Tried

My first and best solution to this was to use the LostFocus event, but, by custom control apparently won't let it fire. After some research, as far as I know, custom controls don't have Focus events because they are custom and could be changed (basically, you have to implement the focus events yourself).

My Question

Does anybody have a solution to either implement the focus events or a way to handle off clicking for custom controls?

Sources

Here is my controls current source:

Imports System.Drawing.Drawing2D
Public Class wDOMElement
Inherits Control

[Code]....

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May 12, 2010

I am getting this annoying warning message "Object reference not set to an instance of an object." all the time because I created several custom user controls and drag it to a Windows form in a vb.net Windows application. I am using vs 2005 and dot.net framework v 2.0. This message pop up when I try to save the projector when I try to debug it in the Design mode.

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Nov 16, 2009

Is this possible? Must be surely but I've tried and come up short. I've created a very basic class (person) with 2 public properties, forename, surname. My user control is databound to this class and has 2 textboxes to store the properties.

I've built the control and can add the user control to a windows form but how can I add to a new user control (Staff) which will show my 2 existing textboxes and I can add dateJoined datepicker also??

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Looping Through Custom Controls On A Form?

Dec 4, 2009

I have created a customised checkbox control (only the text and border appearance has been modified), and wanted to loop through them in a User quizto see which have been checked and are correct. I have used the Tag property (set to 1 or 0) to identify incorrect answers, and tried to loop through with the following code:For Each thing As GMAW.MyCheckBox In currentParent.ActiveMdiChild.Controls

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Make Custom Controls Available To All Projects?

Aug 6, 2009

I have some custom controls in a specific project. I want to make these controls available to ALL my projects.  How do I do this?

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VS 2008 Custom Controls In Toolbox?

Jun 23, 2010

I got a third party control from a website after googling.Inorder to use that control, I simply right-clicked the Toolbox and selected "Choose Item". Then Browse to that dll file location and selected that file.Now it is added to the toolbox. But do I have to register the dll now ? Or, will it work when I distribute my app ?

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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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What Is The Best Reference Material On WPF Custom Controls

Aug 24, 2009

I currently do all development work in VB.NET 2008, winforms; but within 18 months will be switching to WPF (for better or worse). I have had great success using Matthew MacDonald's "Pro NET 2.0 Windows Forms and Custom Controls in VB 2005" book. This is an excellent reference focused entirely on the development of custom controls in windows forms. ( Many of the controls that I use have to have a very specific UI look and feel, so they end up being custom.

I'm looking for pretty much the exact same thing, except focused on WPF. MacDonald has a new book coming out on WPF in general ,but not on custom controls. Books are my preferred reference material, but any good web references.

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Working With Properties In Custom Controls?

Feb 1, 2011

I am trying to learn how to create Windows Forms custom controls in VB.Net by creating a .Net version of an old control I created in VB6. On this control, I have a UserControl with a Label (lblCaption), and several of the properties I add to the control should be passed to the label.This is the code I tried for the ForeColor property:

Code:
Protected mcolForeColor As Color = Color.FromKnownColor(KnownColor.ButtonHighlight)
Public Overrides Property ForeColor() As Color
Get

[code]....

When I change the ForeColor on the control in my test project, lblCaption does change to the color I selected; however, when I run the application, the label changes back to the default (button highlight) color, and the value of the property is also reverted back when I return to the form designer.What would be the proper way to implement the ForeColor property on a custom control?

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Feb 27, 2009

I need to know how to make Custom Windows Controls?

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Jun 3, 2009

In the first comment (by J.W.) to this question: Using ObjectDataSource and DataObjectTypeName, How Do You Handle Delete Methods With Just An Id Parameter?, it is said that using ObjectDataSource is a bad design. What is considered good design for well-architected ASP.NET applications?

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Jul 27, 2009

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Dec 6, 2011

I have a form named VBProject It has two TextBoxes and one custom control named MyControl which is created in another project.MyControl's project has a form inside, named Form3. When My control is loaded it needs to find all controls in my VBProject and add them into a listbox which is in Form3. Then Show the Form3. In the end ListView need to shows name and text of textboxes but it shows nothing. Here are my codes:

MyControl's Load_Event:

Dim i As Integer = 0
MessageBox.Show("Control Count:" + Me.Controls.Count.ToString)
For Each MyObject In Me.Controls
If TypeOf MyObject Is TextBox Then

[code]...

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Nov 17, 2011

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Sep 11, 2011

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[Code]...

and it works but when I run the project each item is duplicated - this is because list is populated twice. First when user add a control to form, second by designer when project is started.I already found a solution to prevent adding items in edit mode, but this is not what I need. I would like to have them existing in edit mode so they could be edited at this point.

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Mar 16, 2010

Can someone point me in the direction of a good tutorial on creating and building custom controls that can be added to the Toolbox?

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Apr 17, 2011

Now as the title says, I'm looking for guidance on some design-time support for the many custom controls I'm working on at the moment.At the moment I'm 3 months in on a Business and Inventory management system for my mothers business. It contains many, many custom controls I had to build from scratch because the ones provided just didn't cut it for what I needed. Now one in particular is a tab page control. Just as the provided TabControl Visual Studios supply's us. It has a lot of design time control. Such as clicking the tabs and adding controls to the panels being brought to front by the corresponding tab being clicked. I had a friend of mine try to show me what I had to do, but the way I had already built my control would have made it difficult - His words, so he never officially showed me anything. If it is true what he said then I can skip that, no problem. But adding the controls to the panels during design time I must have, but cannot seem to find anything through Google searches, text books or even kids majoring in software engineering.

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Feb 26, 2009

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Jun 18, 2009

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Oct 21, 2008

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I have tried everything I know to fix it:Delete bin/debug folders and restart
Build, build, build, build, and build Target the same .NET Framework version and CPU platform in all projects Build again Nothing works...

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[Code]...

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Next
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