Work With Many Controls At The Same Time?
May 12, 2009
I have a form which has many textboxes on it, some are dynamically generated and some are not. They structure is something like this:
[Code]...
Is there a way to create a collection of all of the textboxes so that I can access all at any time? Like when I need to clear them, or when I need to compare them. Right now I either access them one by one, like textbox1.text or I run a loop starting from the main flowlayoutcontrol, going inside, testing if control is another flowlayout, then going deeper and so on. Seems like there should be another simpler way to do this though, is there?
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Nov 20, 2011
I've got a couple of these NumericUpDown controls I put on a form. Without describing too much about the form I basically want to update some variables each time one of these NumUD controls changes value. So for each NumUD I have a call to a Recalculate subroutine within their "changedValue" event.
There are actually two problems. First, if I initialize the "Value" property to something other than zero in VB2010 at DESIGN TIME it won't even open the form when I hit RUN. It gives me a "No Source Available. No symbols loaded for any call stack frame" error. The error box says "InvalidOperationException" was not handled. So if I try to set the initial value of the Value property to anything but zero of either I get this error.
[Code]...
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May 13, 2009
I've been building controls for many years professionally and personally, but even back in VB6 days I just could not work this out. After all this time I remembered about it again.If I create a usercontrol/containercontrol and add one or more controls to the controls surface, I just cannot figure out how to access the controls at design time.
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Feb 9, 2010
How do I get controls to work right when they are on glass?
I am trying to do like IE and extend to a textbox for address bar but the text becomes transparent, how do I do it?
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Jul 26, 2009
Want to use several panels on a single form and have them turned on based on what button you click. Think I can figure out how to turn panels on and off but I find it difficult to manage multible panels within a single form in Visual Studio.When I create multible panels they end of connect to eachother instead of connecting back to the main form and when you add child controls it is difficult to know what pannel they got connected to.
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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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Jan 27, 2010
I am fooling around with VB for a while now and it is not the first time I created custom controls to use in an application. The situation: I have a database application (FormView / not GridView). The form is designed the following way: At the left I have a Panel1 with TextBoxes and other controls to view / edit dataset records. At the right I have a Panel2 which contains on default a custom control (a number of PictureBoxes mainly) to view / add / delete pictures associated with the currently viewed data record.
On a ButtonClick at a special button on the ToolStrip, I would like to replace that custom control in Panel2 with another custom control (which contains a search with different search possibilities), so, I basically throw out the PictureControl and load a SearchControl instead. This is the first time where I actually designed the custom controls within the actual project. In past, I always developed the custom controls seperately in a new project and later imported the dll. However, my first attempt just does not work and I don't even know where I should start troubleshooting since I don't get any errors.
[Code]...
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Oct 31, 2010
I have a form and controls on from I work with background worker on my form and I want when I work with background worker in (for next) changed a data table example (mydt.clear()) or change a datagrideview..how to update controls on a form when we work with background worker? [code]
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Dec 24, 2010
Using VB.NET 2008 desktop project, I created a simple tooltip on Form_Load event and attached it to a button on the form. Looks great when user hovers over button but times out after 30 seconds (which I set using popup delay etc.). But once it fades out, the second time user hovers over the button, the tooltip never shows up. Almost like it dies a natural death!
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Mar 12, 2011
I want my program to work for a certain period of time, may be one month.. two month..
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Jan 17, 2010
i have to send a time sheet to my work each week. which i do in word. what i want to do is be able to open my word document keeping the exact same format, tables must be the same, allowing me fill out the timesheet in my vb app, i could make life so much easier doing this. because i have alot of functions i could add using vb to make my life so much easier.
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Feb 23, 2010
How can more than one programmer work on the same project at one time? is this possible? it surely must be possible??
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Sep 4, 2009
I am using VB2008 express and I have created a form etc.
But any changes I make in the IDE dont appear in the run time. It seems to revert to another version at run time and I dont know how. I have tried adding new code, i tested this with a 'form load messagebox', but it does not appear. I also added a new button and resized the form but none of these changes are appearing, I really have no clue as to what is happening. I have turned of the veriosning in the project settings.
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Jun 8, 2011
I have developed a system which i want my client to use for trial purpose for 1 month. i want a software or an idea to time the system for that period after which it should cease to work.
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Feb 9, 2012
So i know this is more Math related but it would make life so much easier. What i want to do is enter 2 times into 2 text boxes and then subtract them from eachother to find out the hours inbetween as a decimal.
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Jun 9, 2009
When adding controls to a form at runtime, you can do either of the following:
[Code]...
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Apr 14, 2011
I am adding controls to form at run time.I am doing the following with no problem:
[Code]...
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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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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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Jul 22, 2010
Recently i worked on a VB. I have to know how can create controls Dynamically on the run time and how can access these controls on the runtime??
Ex: I want to Create 10 checkboxes at runtime. After creating Checkboxes Dynamically how can i access these Checkboxes?? like i create Checkbox Called "chkAll" , If i check "ChkAll" checkbox then all Dynamic Checkboxes should be Check otherwise UnCheck?
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Aug 7, 2010
I am developing a form where I want the user to enter a complete recipe. In any recipe, I have no way to know how many different ingredients or how many steps will be involved. So if I am using a row consisting of a textbox, a combobox, and a textbox to represent 1 ingredient. how do I generate a dynamic number of these controls at run time? I have the same problem when I store the steps in creating the recipe. I need to create a dynamic number of textboxes to record each step.
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Jun 13, 2011
I'm making a quite large database management program(well actually 3 databases) and I am going to be creating a tab page for each database and under that a tab page for each table. each database has +- 200 tables and each of those has between 10 and 50 columns. I am also gonna put controls on each tab page of a table that represent a a row of data.I need very specific tooltips, functions for each table so generating it would be to complicated for me.
I need a automated way of creating controls on design time depending on the column datatype like a rich edit, text box or numeric up or down. and a label that has the same text as the column name It should also rename the name of the control to something appropriate .This can be done using visual studio's database wizard, but last time when I was about 30% done with one database it had already auto generated more than 1000000 lines of code. When I ran my program it took 10 minutes to show the first form and I have a powerful pc.
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Aug 21, 2009
I vaguely remember something about a hotkey or menu that would group controls together at design time so you could drag 2 or more controls around and they would remain relative to eachother. You could work on something else and come back and the controls would still be grouped.
Does anybody know what this feature is called and how I can access it?
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Jun 12, 2011
I Put together this bit of code. What the problem im having is Removing a Label after i place the code its in a select end slecte code . The Problem is in red.
the code
Dim Animals As String = (TextBox1.Text)
Select Case Animals
Case "Apples"
[Code].....
Everything works Accept the remove selection ... I think it has something to do with Dim LB As New Label() ... And ... Me.Controls.Remove(LB)
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Oct 31, 2011
I have 3 check boxes on a form and am trying to code them to change the font in combinations of Large Font,Bold Font, and underline font.I coded the bold font check box and large font check box but cannot get the Bold and large font to work at the same time.
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Apr 29, 2011
I was using a time picker which returns the date and time together. This was making for me problems since i am comparing this value with a database column of type time only. Tried another free time picker control but when assigning it to a repeater and when it comes to define the data source of repeater and writting the SQL Query I cant select the time picker control from the drop down list simply because it is not available.any other time picker controls with a stylish look and effecient?
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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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Sep 25, 2011
In VB6 I would simply retrieve the user font setting from the .ini file, load into variables and then apply to the appropriate control.
text1.fontbold = userfontbold
text1.fontitalic = userfontitalic
text1.fontunderline = userfontunderline
etc.
I'm struggling to understand how to do this vb.net The following code works, but sets all three at one time
Text1.Font = New Font("Courier", 10, FontStyle.Bold Or FontStyle.Italic Or FontStyle.Underline)Since the user can have many different combinations of settings, I would like to be able to add just one of these properties at a time, but can't seem to figure out how to do it.
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Apr 15, 2012
how to validate date time picker controls.
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Mar 1, 2011
Vb.net For each currentFarm in ......
If urlQueue.Count > 0 Then
Debug.Assert(currentFarm.isBusy = False)
Debug.Assert(currentFarm.WebClient.IsBusy = False)
[CODE]...
The commented code won't work. That's because by the time the thread start, the variable currentFarm have changed. So I create a new function and cache the currentFarm in the function parameter. No there will be a cache of currentFarm address (object is always a pointer) on a stack and that address is the one being passed to the System.Threading.Thread constructor.
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