Basically I have a list box with a collection of strings. The way it works is you select an item from the list box then enter an integer into a text box and it calculates, straight forward.Where I'm getting tripped up is I'm trying to implement a 'Reset' button to reset the list box and text box. The text box is straight forward as is clearing the selection in the listbox:[code]I understand that since there is nothing selected the index is getting tripped up or whatever but I don't know how to stop this. I'm new to VB and programming in general and have been googling for days trying to get this fixed to no avail.
Im trying to effectively, Save a listviews items to A database (after clearing it) then load it all back in to the listbox, would this do it? becuase it just doubles what ever is in the listbox @ the time,
Dim ConnStr As String = "Provider = Microsoft.Jet.OLEDB.4.0; Data Source = " + System.Windows.Forms.Application.StartupPath + "data.mdb" Dim DT As New DataTable() Dim SQLStr As String = "DELETE * FROM [keys]"
I have multiple textboxes that I clear once the task is done to be ready for the next set of information to be populated into the textboxes when the user opens the next file.In the textbox_TextChanged event I check to make sure there is some text in the textbox before running the code. Since I am clearing the textbox this fires the TextChanged event and causes me an error:
Is there any way to limit the listbox selection to just 2 I have done this code
Protected Sub ListBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged If ListBox1.GetSelectedIndices.Length > 3 Then
I've problem with clearing the drawing in PictureBox. The parts of a drawing are created with PictureBox1_ Paint Event like this: Name is one of the Subs (just part of a drawing). I've created a second event Timer1_Tick in which I want to clear the drawing created before but I can't reach it just with g.Clear(Color.White).
I'm doing an assignment for Uni and in my VB.NET form I have some checkboxes, I'm trying to loop through and clear them (I have a button which will clear the form). My problem is that there seems to be no property I can use to set the state of a checkbox when not explicitly telling VB which checkbox I want to use. for example, I can go WineCheckBox.Checked = False
That will check the box, but I wand to DRY the code up a bit and not have to repeat this for each check box I have, this is what I was trying to do: If TypeOf element Is CheckBox Then element.Checked = False End If I've tried using element.CheckState and element.Checked and both times I get "Checked (or CheckState) is not a member of System.Windows.Forms.Control".
This is the whole block of code: 'clear the controls For Each element As Control In Me.Controls If TypeOf element Is TextBox Then [Code] .....
Am just goin on 3 weeks of teaching myself vb2010 and have found a long way to do a simple task. Well it seems it should be a simple task. I have about 12 different listboxes spread over 3 different tabcontrols. There are 3 buttons that load all the listboxes according to which tabcontrol they are in. I found that when populating the listboxes it would not clear before loading the information so it would basically double post, triple post etc. I've figured out one way to do it that I've put in a sub and call the line before the tabcontrols are populated with their listboxes. Here is the sub:
[Code]...
It seems like a longwinded way to do this is their an easier way to have one command clear all listboxes within all tabpages within all tabcontrols on the form??
I've been making a scheduling program using the calendar object.I can manage to select any date with a single click with a message box pop up entering a memo for the date selected. After pressing ok, the memo is displayed in a list box, with date.
1.Unfortunately the date is being displayed twice - perhaps because i used .selectedrange in the handler ? i would like it to be listed only once
2. the memo comes up on a separate line, ideally id like it to be displayed on the same line as the date.i tried ListBox1.Items.Add(whendate, memo) but it cant compile, so ive had to put each line in seperately
3. I would like to mark the sundays and national holidays in red color (the calendar is only set for a year so i dont mind doing them by hand, however the only tool i can find in the Monthcalendar1 properties is MonthlyBoldedDates, and no color assignment [code]
I am doing a lab where you have to connect to the database using the Database Configuration Wizard in Visual Basic (Visual Studio 2008). The database connection is there since the form will display the records.The problem is the user is supposed to be able to click on the combobox arrow to select a stock rating (high, low, etc) and then the listbox will display only the stocks with that rating. I thought this would work but nothing is showing up in the listbox.
' strSql is a SQL statement which selects all the fields from the Team database. Dim strSql As String = "SELECT * FROM Stocks" 'strPath provides the database type and path of the Team database[code]...
This program allows a user to select a workshop and a destination, only one selection should be made. When I test I find I can add multiple of the same.
Private Sub ListBox1_Validated(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListBox1.Validated If ListBox1.SelectedIndex = -1 Then Beep() MessageBox.Show("Select a workshop please.") End If [Code] .....
This is my first time to be here and is a total newbie with Visual Basic 2008. I have background in VBA Excel and would like to try Visual Basic 2008. I would like to start off on a certain project and I am currently in trying to load image (in jpg format) into the picturebox thru listbox selection. I have found this code here and is trying to modify it to suite my needs but is having quite a tough time to set it right. [code]....
I am currently using the NorthWindDataSet from the msdn tutorials.So far, here is what I have to populate one of the listboxes on my form:[code] I make a selection in ListBox2 I would like ListBox3 on my form to be populated with that particular person's Order #'s.
I have a list box with a collection of items; Can I save user selection the next time the program opens by using Application Settings tab and property Binding?
I am creating a program with multiple Forms designed to track multiple projects.The first form is designed to setup new projects and obtain previous projects, from there the other forms open to be filled in with information.For new projects the next forms open blank but I then need these later forms to be tied to this project name so that it can be selected from a combobox and the information will be already populated.tieing the information on the later forms to the projects populated in the combobox so that it appears when a specific project is selected.Is this able to be done without creating databases?
As an example, say I create a new project then a new form opens and I add some information to a textbox.I would then like to be able to save the information so that the project name moves to the combobox on the first form (I can handle this) and the information input in to the textbox is tied to the project name so that when the program is reopened and the project name is selected the second form opens with the textbox populated.
i am working on a program that has a randomize button that can already randomize the selection of a listbox. Now i wanted to make it also randomize the selection of a listview, but i can seem to find out how to do this. Ive tried using the same code, but it said that add isnt part of listview.
Heres the code:
Dim Random As New System.Random Listbox1.BeginUpdate() Dim ArrayList As New System.Collections.ArrayList(Listbox1.Items)
ive just registered but ive been reading this forum before.I have a medium problem and an easy problem.
My project adds dates in runtime to a listbox.It can be any date inputed by the user so theres no way to know which date is at which position thats why the listbox index stuff for me is totally useless.Problem 1: if lets say a user types in a date into a textbox "27-03-2001, and press an "OK" button, i want to select that date automatically in the listbox if it exists.the only way ive found so far to programatically select an item is to use the index stuff which as i said is worthless for my situation as the comparison is a string,So, how can i select an item from the listbox using a string to item comparison?
Problem 2: Dates in the listbox are dd-mm-yyyy format so they dont arrange properly, is there anyway i can make the listbox sort the items counting from right to left instead of left to right? because that would solve my problem as it would be like inverting the date itself while sorting.
if you can answear any of these 2 problems please dont hesitate to comment about it, if its possible or not and if it is how i can do it.Both problems are at the same importance for me
I have a question regarding Databound listbox (Item selection)I have not used the listbox much so I am very uncurrent in it's use:What I am wanting to to is connect to a database, select from the database (lastname) then display the list of names in the listbox, also have a datagrid on the same form, so that when I click on a name on the listbox the datagrid moves to that same record.
Just wondering if someone can at least point out where I'm going wrong here. I've already got the code to populate the listbox by a button click from the user and am just trying to figure out how exactly to alter the text of a label based on what the user selects in the listbox. From what I have the Label will display the case else selection but nothing else despite my best efforts to get it to change. Here is what I've tried. I realize it is very trivial, but I am only a beginner to programming.
I have a form with a combo box and a checked list box. When I select one item in the combo box, I want the list in the checked list box to change to the appropriate choices.
I have code to create a listbox and populate it, and would like the box to behave like it does when clicked, e.g. if you CLICK on "a" you see it blue and can press the down arrow to move down to "b". how do I achieve this programmatically?
Private Sub junkloader() brandlist.Visible = True brandlist.Items.Clear() brandlist.Items.Add("a")[code].....
this code SELECTS it properly, but I want to be able to navigate with the up and down arrows. how do I do this? thanks.
I Have two listboxes , Listbox1 and Listbox 2 , I want to select some items from listbox1 to listbox2 , with those selected items in listboxe2 I want it to extract specific data concerns to those selected item from Microsoft Access and later.I want to use only those specific extracted data to calculated some mathematical function.
As the title suggests I have a ComboBox and 2 listBoxes on a form. I need to fill the left ListBox with items not now asssociated with the ComboBox selection and the ListBox on the right with items already associated with the ComboBox selection. Is it possible to populate the ComboBox and each ListBox using only one query and returning a dataset of ALL the data to do so, or do I need to Populate the ComboBox, then use 2 queries, one for each ListBox?
