i modified my tabcontrol, to change the tab forecolor, which worked but now when i try to change selectedindex in code, the correct tab is highlighted but the tabpage doesn't change. if i minimize + restore the form, the previous tab is highlighted...
View 6 RepliesI have a TabControl in an application that started behaving strangely. this program was converted from VB6 to VB .NET 2008, and used to refer to forms using their class names. In other words, I might have a form class called frmFoo. In the code for the program you might see:
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I opened the program and read a file. This file contained a value that should have triggered the event handler. Without making the control visible, I can change the SelectedIndex property of the tab control without the event firing.I closed the program down again, and reopened it. This time, selected the parent tab that allowed the child tab (the one whose event I'm concerned with) to become visible. I then selected a different tab in the parent control, meaning that the child control was no longer visible. When I opened the same file as before, it fired the event.
I'm tempted to implement a flag that confirms that the control has been repainted or whether the parent tab has been displayed. I may have to fire the event in code if the flag isn't set. I want to reiterate that everything worked when the program referred to the forms by their class names and much of the arrangement of controls on the forms was done in the load event. Now the program creates variables and the arrangement of the controls is done in the form's constructor. I'm sure this has something to do with the problem I'm having, but I can't understand how.
I have a listbox and two buttons. Each of my button is labeled UP and DOWN. When I press UP, the current item in my listbox will be moved one level (or index) up and when I press DOWN button the current item goes one level down. I have been trying to manipulate the selectedindex property but it isn't working.
View 11 RepliesI have several list boxes on a form, the items collection is filled at design time and the selectedIndex is changed at run time. when I change the SelectedIndex the backcolor of the control changes. I don't want this to happen.
View 1 RepliesCode for button:
Protected Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click
Dim li1 As ListItem
Dim addList As New List(Of ListItem)
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Updates are happening on the load of a dropdownbox This has something to do with autopostbacks and the page load I think, can someone please help When I click the add button even if I have selected an item in the listbox, it will always return an error message. I don't think the listbox changedselected item is firing.
I have a ComboBox which content might change. The issue is when the content is changed, 1) i lose the previous selectedIndex, and 2) SelectedIndex is set to -1. I would like an MVVM solution, not some solution involving code-behind. I can have the SelectedIndex set to 0 on content change, but -1 is not a valid value for my model.
What i did as a 'trick' was to have the setter of the property bound to SelectedIndex to set the value to 0 when the value is set to -1. So now i don't have incorrect value in my model. But the ComboBox does not display the "0"th item, rather an empty box.
What could i do to have my ComboBox display the first item (index 0) when its content changes ?
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Weeks is a Notifying property that is a list of strings. It is changed when i change the Year property.WeekNumber is a notifying property of type integer. Now when it is set to -1, i set the corresponding private member to 0 to avoid wrong value in my model.
how would i go about creating an ownerdrawn dtp, with highlighted dates in the dropdown + also in the collapsed view when a highlighted date is selected?i'm guessing i'd have to inherit a dtp + then handle an event or 2.
View 3 RepliesI have this code for an ownerdrawn list box that is repainting too frequently. It seems to be related to trying to scroll an event with a different height than normal. Here is the 'smallest code to reproduce the problem' that can be pasted into a blank form (erase the designer file) - VB version (c# of course does the same thing):
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I tried to change the TabControl back color but only succeeded changing the tabs back color (with the code below) but not the tab control color (which is behind the tabs, in the upper right corner).
Private Sub TabControl1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles TabControl1.DrawItem
'Firstly we'll define some parameters.
Dim CurrentTab As TabPage = TabControl1.TabPages(e.Index)
Dim ItemRect As Rectangle = TabControl1.GetTabRect(e.Index)
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The appearance of the selected Tab on the tabcontrol is sort of subtle. I'd like to either change the font, make it bold or change its color. The .font property appears to be relative to the font on the tabpage---not the font on the tabcontrol tab.
Is there any way to change the tabcontrol tab so that the SelectedTab is more prominent?
how to change the tabpage selected of the tabcontrol by using normal buttons (like button1, button2,button3 and so on). I don't want to use the ugly default buttons at the top of the tabcontrol to change it.
View 4 RepliesHow can I change the border size/style/color of my TabControl to make it blend in with my form's background color?I am unable to find any property for this in Visual Studio. Is this possible?
View 2 RepliesI am a newbie in development. I have a window application in vb.net in VS 2003 there is a tabcontrol which has three tab pages. I want that user was not able to change tabpages by clicking tabcontrol rather than it is done by clicking button on tabpages how it is possible?
View 7 RepliesHow 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.
View 2 RepliesI'm doing my project and I design including many tab control in vb.net.
Example: I have 3 tab pages like tab1,tab2,tab3. And I have menu bar to open tab1,tab2,tab3.
My Question is: How can you use code to open each tab page?
I'm getting familiar now with using the Dataset Designer and how it makes for quick and easy updates and query of tables. I use to use the OleDB commands and leave the Connection String as a Global Constant so I can easily change it if the server name changes, or if we have to re-direct the .NET to another instance of the database.
But now that I use the Dataset designer I'm concerned that I maintain flexibility and support in the long run. how the Dataset designer works and where it stores it's connection string info? And how difficult that would be to update. It looks like I modify the App.config file, but I'm unfamiliar with this.
What am I getting myself into? It looks like a standard XML file. Is that it?
I have a code in VB that looks like this:'Server.Transfer(txtUser.Text + "_page.aspx")which is taking a forms authenticated user to their page. For example if John logs in, it will take him to john_page.aspx.How will I be able to integrate this in a PHP login script?I'm trying something like:header("location: $member ._page.php");but I don't think I'm doing this correctly.
View 1 RepliesHow can I change my code # to Code & in All the text files within a folder
View 10 RepliesI have the following code;
txtprojnameupdt.Text = txtProjname.Text
cmbactiveproj.SelectedIndex = cmbactiveproj.FindStringExact(Replace(txtprojnameupdt.Text, "'", "''"))
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I have a dropdown list that I am binding to a datatable. Here is the code I am using to do it:[code].....
Unfortunately, the line ddlBuildAddr.SelectedIndex = addressId is failing. Looking at this line through the debugger, the SelectedIndex goes to -1, while addressId goes to 2. What gives? Why would the assignment operator flatout not work?
Is this possible? I programatically change the selected index when a certain event is fired using this code:
DropDownList.SelectedIndex = DropDownList.SelectedIndex + 1
Now I want to update a corresponding textbox with the text that is in the new SelectedIndex of the DropDownList via postback.What's the easiest way to do this?I know how I can do this in javascript.... I was just wondering if i could do this in the VB code behind.
I click on items in my listbox and then hit a submit button, but when istep through my button_clicked code it doesn't detect any selectedindex. All controls are in the same form and there are no panels. Why can't I detect what items were clicked on in the listbox?
View 2 RepliesMy understanding is that if you set a ComboBoxes .SelectedIndex to -1, it should unselect any items in the ComboBox and show nothing in the ComboBox text. This is not happening. How can I get that to happen?I have 10 items in the Combobox. Let's say the index is set to number 5 and the text says "MasterCard". Now through code I want to set it to -1 and the text should show nothing. How can I do this?
View 15 RepliesI have a DataGridViewComboBoxColumn that I allow the user to add new items to by typing in the ComboBox and hitting the 'Enter' key. That triggers CellValidating and I do the adding there by the following:
cmbColumn.Items.Add(e.FormattedValue)
All this works well, except that it leaves the DataGridViewComboBoxColumn blank. How can I set the DataGridViewComboBoxColumn to display the e.FormattedValue?
As you know by question that what i want. i was using listbox. In Listbox we can get selected item by a simple line of code:listbox1. selectedItem. now i am using ListView, how i get the SelectedItem or Selectedindex of ListView.
View 3 RepliesI have a listbox that contains numbers that vary from 0 to 99. My problem is when the number in the listbox is 0, listbox1.selectedindex will not return a value. So I cannot use removeat(x) which works for all other numbers. Can anyone give me an idea on how to do
View 4 RepliesI have a list box with over 50 words. I would like the user to be able to type the first few letters of the word in a text box, and the program would automatically set the SelectedIndex property to that word in the box.
View 2 RepliesThe adultcombobox & childcombobox have value from 1 to 10, and none.I try put it in Do Loop like the code below, but the total price not come up so well, so I think I am having problem with the Do Loop and the Payment method.One more thing, do I need to Tryparse the combobox and use the selectedIndex ?
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So i made this thread using the following
Public DoCopy_thread As New Threading.Thread(AddressOf docopy)
public Sub docopy(ByVal state As Object)
If ListBox2.Items(ListBox1.SelectedIndex) <> "" Then
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How do I set SelectedIndex of a DataGridViewComboBoxCell?The code fill the combobox with items, but I need to select one of them My Code:
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