VS 2008 Preload/execute Tabs On A Form?
Jan 14, 2010
I start my program with a splashscreen and as soon as the mainform is loaded, databases are loaded and data is crunched it shows the form with everything on it. All very nice. But now comes the trick. The form has a strip of 5 tabs on it. The active tab is shown and directly accesible but as soon as i click on the other tabs it needs time to draw everything and calculate its content. And when i have clicked through all of them everything is finally up to speed. How can i speed things up in such away that all this predrawing etc is done in the background just as i got it to work with my mainwindow and its first tab?
I have this in the load sub:
For i = 0 To TabControl1.TabCount - 1
TabControl1.TabPages.Item(i).Invalidate()
Next
But some how this does not do the trick.
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Apr 23, 2009
I know this is probably a simple question, but I wanted to load 2 other forms when my mainform loads, but to be hidden. I know how to show and hide the form once it's been loaded into memory, but how to load it in a hidden state?
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Jul 9, 2010
I have a BIG piece of code that looks like this: Public Sub mnuNew_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuNew.Click ' Lots of code End Sub I need to execute this subroutine from another part of the same form's code. This should be fairly simple but I haven't been able to figure it out. How do I do this?
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Aug 19, 2010
im trying to learn how to code more efficiently and was wondering how to preload combo boxes better. im working on a project atm that has many comboboxes with the same menu information. how to i link the information in a sub procedure when the comboboxes all have different names?
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Jun 7, 2010
on the loan of my application i created a background_worker to pre-load some of my child forms. here is the problem - it seems that the forms gets loaded into the second process and it wont have any affects on the original process .
In another words when i try to show the preloaded form nothing is displayed. How can i ask the background process to "Merge" with the main process when it is completed! i am not sure if merge is the best word to describe what i am trying to do here!!!
also if i try to re load the form that was created by the main process i will get exception saying you can't change one some that was created by another process
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Mar 16, 2009
I was wondering if there was a solution to replacing the tab control's tabs with custom tabs made in Photoshop. I know there are plenty of super expensive programs that can do it, but I was wondering if there was a way to do it programmatically. I was thinking that maybe it could linked in some way with a .DLL?
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Mar 6, 2009
My code is basically a file parser/editor and it handles most files fine as they hold a handful of records concerning family members. However there are a few files that crash when trying to deal with them. Here is the problem.Each family member record creates 3 tabs that hold an average of 3 group boxes each. Each group box holds an average of 3 text boxes.So each member record creates 3x3x3 = 27 text boxes and some files get up to 289 family members which = 7803 text boxes.
The problem is the rare file with 400+ member records = 10,800 text boxes which causes a crash due to using up all the window handles. Each member has a separate tab page (with 3 subpages) but really only a dozen or so member pages are visible in the GUI with scroll arrows to move through them so I was thinking of somehow making the GUI a scrollable window so the tabs get built, displayed and disposed as the user scrolls left and right through the member tabs.
The files are parsed into a 3d list DataList(x,y,z) where x is the page number, y is the group box number and z is the text box number. So all the data is available. The code then traverses MyList and builds GuiList(x,y) where x is the page number and y is the groupbox number with all the textbox.text linked to MyList(x,y,z) locations so all text changes are reflected in the MyList.
I already have a memberCount variable and I am thinking of building, say, the first 30 member tabs with the middle 10 being visible in the GUI. If the selected tab > 20, then dispose of the first 10 tabs and create tabs 30-40.I am thinking I will keep all the member tab pages so I don't have to deal with inserts and indexing problems but just dispose all the group boxes and text boxes for tab pages out of view. I already have a deep clone sub that clones members when the user wants to add a new family member and I am thinking I will have to add something similar when a tabpage is passed in for disposal, it traverses and disposes each text box, then disposes the group box for each group box on the tab page.Additionally, another routine will rebuild the group boxes from the data held in MyList(x,y,z) when a tabpage(x) is passed in.
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Apr 5, 2010
I have two tabs on a form, and I would like to know how can I display the second one when a button is clicked? The name of my tab control is tabSurvey.
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Sep 23, 2011
I have buttons a few text boxes etc on a form, however I want to move it all to a tab (as in the tab control). I add a new tab control, cut all the buttons and textboxes, paste them into the tab control on tab 1. All good so far. When I run it, and click the buttons, they dont do anything. Do I need to move all the code to somewhere else or something?
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Mar 15, 2010
I have a template form with a tab control. How do I change tabs on the form that it inherits from? Do I need a different technique?
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Jan 1, 2012
I have a form with 3 tabs: one tab is for user entry and computations, a second tab shows values that will be used for computations which are read from one database (I call it settings in that the values are constants for calculations but it's not application settings in the way people think of it, to be clear) and the third displays a table from another database. The second tab has a table adapter interface for the dataset that contains values used for calculations that can be changed (to do different scenarios.) Those numbers are read from a single record in a database that has 20 fields and was read once when the data is loaded into the second tab to be displayed.
The problem I am having is that I would like to use the numbers from the second tab (the constants) in computations to be shown on the first tab. I have tried declaring the variables on the second tab as public but they are already "friends" with the form event. However, when I go to use them in calculations, it's like they don't exist.
For example, one calculation I am doing is fuel cost. The user enters miles and this is stored as a variable called mileage. To calculate the result fuelcost, I have to use two other fields that are shown in the second tab: MPG (miles per gallon) and fuelprice (the price of gas). So fuelcost = (mileage/mpg)*fuelprice. These are read from a datatable called testdata which is actually part of the project. I want to be able to use these variables throughout the program but declaring them as public isn't working.
How do I make the variables from one tab usable elsewhere in the program? The other thing I noticed is since the values of the variables are loaded into textboxes and assigned variable names by naming the textboxes, using val([variablename].text) isn't solving the problem either. For example, saying milespergallon = val(mpg.text) is not doing the trick because I am getting a message that 'text' is not an integer when I declare milespergallon.
Update Here the code that is being used:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim mileage = Int32.Parse(Miles.Text)
Dim rate = 0
Dim baserate = 0
[code]....
TabPage2 is where the variables are displayed that I want to use in TabPage1.
Private Sub TabPage2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TabPage2.Click
End Sub
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Aug 14, 2009
I've got a spreadsheetgear form but when I change its values and do some calculations on differed tabs. I want to be able to save all the data and tabs at it curent state so when I open the application it is at the saved state. I'm not worried about the values before I saved.
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Feb 28, 2011
I am working on a project that requires the use of multiple tabs, but the problem is all my codes/layouts so far has been on a single form. How easy would it be to transfer the existing codes and layouts on a single form to a multi-tabs environment ?
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Mar 15, 2011
I'm making a tabbed browser and I want to get favicons in the tabs. I have a picturebox by the address bar that shows it just fine, but I want it in the tabs also. The tabs are owner drawn. Can I use the image key to display the favicon? If so, how? I've tried drawing the image in, but it draws it to every tab instead of just the one. Is there any way around this?
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Jun 6, 2011
[code]...
how Can I call privileges.vb from the btn_next_begining?
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Aug 26, 2010
my application the user is going to be able to choose which tabs are going to be displayed, but I need help[ with this.
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Jul 17, 2009
I wanna know How to Create Tabs in Web Browser To all Different Sites At The Same Time.
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Oct 6, 2009
I have a form that has many tabs and I have some buttons just bellow the tabs, but if I could move those buttons and place them inside the tab I would save some space bellow and I could extend on the tabs. So is there a way of moving controls from one tab to another depending which one has focus.
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Sep 28, 2009
I have created a web browser and am trying to get the link that is clicked that would normally open in a new window to open in the current window as I do not want to open any other windows or tabs. This is the code I have so far and it seems to work well kind of anyway, it opens the last url not the new one. Sometime it will open just an advert, it seems to open what ever link was last loaded on the site. [code]
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Apr 25, 2010
I'm trying to search through all tabs to find a specific text. if the text is found, the tab will be hidden, or shown.
I tried this to hide:
btnHide
Dim txt As Object
Dim tabp As TabPage
For Each tabp In TabControl1.TabPages
[Code].....
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Aug 24, 2009
First off I hope this is in the correct I am creating a calculator software in Visual Basic 2008 Express edition. I don't know if it is .NET or not, I assume it is? I downloaded this version: [URL]...Now, I will have tabs at the top. The tabcontrol is named "Tabs". On each tab I will have a different category of mathematical functions. Now, I need the backspace, clear, clear entry, equals, and all the numbers 0-9 to appear on every single tab. Is there a way of doing this without creating a new button named "Backspace2", "Backspace3" for tabs 2 & 3 for example?
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Sep 21, 2009
I've been looking for an option where I could select the position of the tabs but didn't find nothing for it. as I create a new tab it goes on my tab list as the last tab, how to set the position of it?
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Jun 25, 2010
How would i show tab1 with code? I'm using the stranded tab control? For example button1 opens tab 3
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Apr 29, 2009
I am using trial version of VS2008 in which I am not able to create tabs for pages
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Mar 16, 2009
I just had to rebuild a PC and saved my old project files -- hopefully I'm going to be ok with a new installation. I just opened my new install of VB2008 and clicked on a project.
[Code]...
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Mar 5, 2009
Using tabs for my web browser, I noticed (since im using documenttitle to populate the tab text) if a site has a long title, it will extend my tab var far, how can i limit this to a certain amount of text?
tab text code it:
TabControl1.SelectedTab.Text = CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).DocumentTitle
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Mar 23, 2010
Can anyone think of a clever way to execute a piece of code every time a form opens, application wide? I have an app with about 45 screens, and I don't want to drop code in each form load event.
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May 17, 2010
Can anyone think of a clever way to execute a piece of code every time a form opens, application wide? I have an app with about 45 screens, and I don't want to drop code in each form load event.
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Aug 3, 2010
How can I change the color of the tabs of a tabcontrol? I tried to search the forum but everytime I hit the search button I get an "Bad Gateway" error.
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Nov 12, 2009
Using vb.net 2008 Forms. I have a groupbox consisting of several textbox's and a push button. I put this groupbox in a control collection in order to validate each texbox when the push button is clicked.
The code to do this is as follows:
Private Sub bn_updateadditem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bn_updateadditem.Click
Dim InvalidInput As Boolean = False
Controls.AddRange(New System.Windows.Forms.Control() {Me.GroupBox1})
Dim ctrl As Control
For Each ctrl In Controls
[Code] .....
This worked great. However when I moved this groupbox with all its controls onto a tab, the groupbox contents disappeared from the form after the control collection is created and contents validated (per above code).
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