I have a list of a few 1000 names, which I need to load in several comboboxes. Now I can add them manually in the editor, but then the code would be huge, which is unneeded in my hones opinion. Sure I can add then in a database and load them, but that takes more time then loading a file from the hard-drive.
View 9 RepliesI'm working on a program in which I have 2 comboboxes and have to be able to add new Items in both of them, now that all no problems at all but as soon as I close the program I loose all my Items. Is it possible to add a code which checks if an Item already exists and if so give a error message and don't add the new Item to the combobox?
View 4 RepliesI have multiple combox boxes,
A B C
Combobox B has items Fruit, Veg, Dairy
Combobox C needs to contain 3 list and depending on what value is selected in Combo Box B.
For example,
If I select Veg in Combo Box B, I would like to have a drop down list containing "tomatoes, lettuce, onion,..........."
If I select Dairy in Combo Box B, I would like to have a drop down list containing "Milk, Cheese...................."
I am making an application that loads lots of data into a listview. It takes a while to add the data (over 2000 items).Is there a more efficient way of loading these items rather than the standard way? Maybe a quicker control or something.
View 6 RepliesI have this code that adds items in 2 comboboxes: The first code works fine as it adds the dates into the comboxes
Dim myConnection As OleDbConnection = New OleDbConnection
Dim myCommand As OleDbCommand = New OleDbCommand
Dim myDataReader As OleDbDataReader
myConnection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Network_Info.mdb"
[Code] .....
But when I try to add items by month I always get this error in these lines:
ComboBox2.Items.Add(myDataReader("DateRecorded"))
ComboBox3.Items.Add(myDataReader("DateRecorded"))
It says: IndexOutOfRangeException was unhandled
[Code] .....
I have 8 comboBoxes and 8 identical items in each comboBox.If I select one of the items in comboBox1, how can make this item to disappear from all other comboBoxes ?
View 8 RepliesI'm program that uses quite a few different comboboxes. Essentially drop down boxes to prevent invalid user input. Anyways, the problem I've run into is when I'm loading files that will populate those combo boxes. Essentially, certain selection in the combo boxes invalidate selections in other boxes. What I'm doing is taking a text file, and reading it line by line. Each line is based off the combo box selections previously made and saved using the same application. Returning to the same screen, I want to populate the combo boxes with the data previously selected.
I'm initially populating the combo boxes in program with
<combo box>.Items.Add()
Other than searching item by item for the proper text, getting the index of of that text, and then setting that as the selected item?
So what I'm thinking of doing is this...
Dim Fin As System.IO.StreamReader
Fin = System.IO.OpenText(FileName)
Dim sInput As String
Dim iIndex As Integer
[Code] .....
I have 16 comboboxes with a naming convention of:
c1d2
c2d2
c3d2
c4d2
c16d2
These will all contain the same items and I need to add them at runtime. I know how to loop through the controls, but not sure how to make sure I'm only editing the correct comboboxes. (I will have to do this for 2 more sets of comboboxes with similar naming conventions as well)
new to VB and having some problems with my code.the story is that while marking items in comboBox1 need to pass values to 3 different comboBoxes so far I have made code that pass data only to one comboBox. [code]
View 1 Repliesim just wondering if its possible to save the current state of a combobox,for example there are two combo boxes, i selected "3" on the 1st one and "apple" on the second one, is it possible to save that setting so that when i open my program again..i can load that settings?..
View 7 Repliesthis is a subset of a previously posted problem, I have narrowed down my issue and am reposting a question from this thread: [URL] I have apparently confused the compiler by renaming some comboboxes in Visual Basic .net express? (See relevant code below) I think the confusion is in who should handle what, with two routines named with variations of ComboBox1 and one handling the other ( it confuses me just trying to interpret it mentally):
[Code]...
I have a form with 4 comboboxes and a button. The first combobox is enabled, but the rest of the controls are disabled. When the form is opened I fill the first combobox (cbxMethod) with a datatable. When the user selects something in cbxMethod the next combobox (cbxStudy) will be filled and so on. When the last combobox (cbxAnalyte) has a selected value I want to enable the button and give it focus so the user can move forward with the program. I basically want to force the user to move from one combobox to the other, until all are filled.I am currently using the SelectionValueChange event, but this event only fires when the user changes the value with their mouse or hits the Enter key, not when the user hits the Tab key.
Public Class frmCalculatedAnalyte
Private cv_dt As New DataTable
Public Sub New()
[code]....
I have this form filled with data using dataset, data adapter
1 Dataset , 8 data adapters
Textboxes are ok and binding .. fills by 1 data adapter
ComboBoxs are filled by 7 data adapters
The problem is 6 ComboBoxes data is from one table filtered by id1 i.e.:
cmb1 : select id2,content from table2 where id1 = 1
cmb2 : select id2,content from table2 where id1 = 2
cmb3 : select id2,content from table2 where id1 = 3
........
Now how can I bind all ComboBoxs with textboxes?
i am trying to load XML document and populate few checkboxlist. I use DataTextField as below.
[Code]...
i've got access database connected to my project,i can read,write and delete records in it..what i need now is when i select one item from combobox (which is connected to table "clanovi"(members) and it loads their name and surname which is the first column of that table..now when i select one item from that combobox i need other info of members their adress,email,city etc to display in seperate textboxes..this is the function that my friend made for me..it connects to the single table in database,in this case to table "clanovi" .
Public con As New OleDb.OleDbConnection
Public dbProvider As String
Public dbSource As String
[code]......
So basically I have two comboboxes. Combobox1 has these items in it:
Education and Health Services
Financial Activities
Professional and Business Services
[Code]....
am havin a problem in loading sorting items in a listbox. what i want is after i load a text file into a listbox the items are compared by the last number and sorted in descending order.
View 1 RepliesI am having difficulty trying to fill two different comboboxes (cbo) with data from a database. More accurately, the 1st cbo gets filled correctly, but when I attempt to do something similar with the second, I'm getting an error about not being able to use the & Operator in my SQL string (Operator is not defined for string and DataRowView types). So evidently the SelectValue from my combobox isn't acting the way I expect.
The overall goal of what I am attempting to do is to fill two cbo's, one with a list of contracts and a second as a list of parts given the selected contract from the first cbo. There are 3 tables in the database that I am drawing the data from: the "contract" table, the "parts" table, and a bridge table called "partList" that has foreign keys pointing to the two other tables. The first cbo is a basic query to the "contract" table using "ContractName" as the display member and "idContract" as the value member. The 2nd cbo I would like to display the name of the part from the "parts" table but use the id of the part from the "partsList" table, and to further filter this list based on what contract was selected.
I am writing the code in VB.Net from VS 2010, storing the data in a MySQL DB, and using a DBFactory to create all the components from ".GetFactory(MySql.Data.MySqlClient)"Below is the code that has the two places I am attempting to fill the two cbo's. Also if there is a better way to handle this, please let me know.
[Code]...
I f I have 1 combobox then my SQL query will be:
Dim objConnection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source = C:DB.mdb;Jet OLEDB:Database Password=Pass1;")
Dim objdataadapter As New OleDbDataAdapter("SELECT DISTINCT LOCATION FROM Table", objConnection)
I have a huge assignment tommorow in which i have to make a trivia game on visual basic. In this game you have to be able to make your own questions (modify/delete etc). Basically I have one form where you can add questions into one listbox and answers into another listbox. Now i have another form with the actual game board. I want to load each individual listbox item from the other form into the array on the game board form. Example. the first item of form2.listbox1 into question(1)
I got this so far
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim i As Integer
[Code]....
I've got a Program and a text file, this text file gets load into the list box but that's not the problem. The problem is that when I make the text file it makes a open line and this line gets loaded into the list box and I don't want empty items.
So here's code that I use to make text file
Public MySettingfile As String = My.Application.Info.DirectoryPath & "Process History.MemFreo" Dim myCoolWriter As New IO.StreamWriter(MySettingfile, True, System.Text.Encoding.Default)
myCoolWriter.WriteLine()
myCoolWriter.Close()
I am quite new to VB.NET and I am attempting to create a console application that can write, save, load and edit sets of data. Lets say I have something like this:
[Code]...
However, I have no idea how to load the data so I can manipulate it in the EMPLOYEE structure system. I am not sure if I have made my question clear enough, for as you can see I'm quite new to programming and am not essentially familiar with the terms of speech.
I was writing a program that would save the contents of a listbox to a database and wanted to reload the users' choices when the opened up that particular row again. My first thought was to do it with two for loops, just as I used to do in VB6, but I thought there must be a better way to do it. And there was. Sort of. It basically involves using the SelectedObjectCollection class.For this demo, you'll need a listbox called Listbox1. Set selection mode to something other than "One" or else it won't work as expected
Dim items(0 To 3) As String
items(0) = "One"
items(1) = "Two"
[code]......
I gather case info from a DB table into a list(of T) list and display it in a checkedlistbox. When an item in the checkedlistbox is selected (highlighted, not checked), the selectedindexchanged event then retrieves account information from the DB for that case and loads the different accounts for that case in another checkedlistbox.
My issue is figuring out the best way to save the different items that are checked in the accounts checked list box. Since the accounts are loaded dynamically given the selected item in the cases listbox, what would be the best way to save which accounts are selected for each case?Below is my current method of loading the listboxes and selectedindexchanged procedure. I'm fairly new to programing and this is how I was taught load most controls, by list after saving to the list from the DB (which gets very complicated when you have to keep relations between items in separate lists).
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim CasesList As New List(Of String)
CasesList = Db.GetAccounts(CDbl(txtAccountBalance.Text))
[code]....
I need to write client / server application... I need that client write it`s data in textboxes or comboboxes or check any checkboxes and etc. but I need that this info saved not in it`s own computer,on server...
View 5 RepliesI've uploaded in SkyDrive my project to give a better picture of my problem:Cascading Combobox works just once in _SelectionChangeCommitted, and, DataGridView do not follow 3rd Combobox filter?
View 2 RepliesOk here we go again, im a complete beginner to coding and have started with visual studio 2008 using the .net/vb libraries, as my first project i went with an emulation application, and it went great:So now i think its time to move onto a little more advanced tech's, so i added in a combo box and i want to change how my code works, and this is where my troubles are.To start of with the combo box, i have it added to my winform and have 3 items on it 'Action' 'RPG' and 'Sim' and i have made 3 .txt files in the projects root folder with the same names. What i want to have happen is when the user selects for instance 'RPG' from the combo box the items displayed in the listbox change to the contents of the rpg.txt file. After searching around for a few hours and no luck i tried this
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
If (ComboBox1.SelectedItem = "RPG") Then
[code].....
I have 2 comboboxes who are loaded on the formload event with the folloving
[Code]...
Alright, i have this so far:Public Class Form1
Private Sub GhostButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GhostButton1.Click
Me.Close()
End Sub
Private Sub GhostButton2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GhostButton2.Click
[Code]...
I am a beginner learning Visual Basic and am creating a simple quiz.I need my program to load the quiz questions and answers from a CSV file that I have created and saved in the resources folder.
I need some code to load the CSV file into VB and then populate a 2D array with the values from the table.