How To Add Items In Two ComboBoxes
Feb 12, 2010
I 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] .....
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Apr 19, 2012
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 ?
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Oct 21, 2009
I'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] .....
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Nov 12, 2010
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.
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Feb 22, 2010
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)
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Sep 25, 2010
I'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?
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Apr 18, 2010
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]
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Feb 17, 2011
im 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?..
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Jul 16, 2010
I 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...................."
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Apr 24, 2012
this 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]...
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Oct 28, 2011
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]....
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May 13, 2009
I have 5 combo boxes all connected to a database by datasets.
The user should be able to select different items but for some reason when one combobox item is selected, the same item becomes selected for every combobox.
I haven't coded anything regarding the cbx's so why is it doing this?
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Jun 21, 2010
I have two comboboxes the first one is for order #, the second one is for the amount of order payments, there could be 1, 2, 3... payments for this order. I would like to get all payments to show in the second combobox that relate to the order # selected in the first, process that payment by changing other values in other textbox's. Then have that payment psoted as processed back to the DB table. I have a binding satament, but it pulls all payments, and not just per order. How can I get this to select just by order #?
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Oct 27, 2010
I have a project in which the comboboxes above the code window, below the tabs have disappeared. If I open and close the project, they do not appear. If I open another project, they do appear. As soon as a open the project where they do not appear, they disappear.
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Feb 8, 2011
I have: [code] So, when I select something from cmbx1 it selected in cmbx2. How does it works?Do I need a copy of dt for second combobox to get independed but same values?
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Mar 15, 2012
My problem in the Combo Box and SQL query .. I have three comboboxes linked to an Access 2007 database
[Code]...
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May 10, 2012
I've been working on a VB project where I use a 1st drop down list to select a movie category and then in the 2nd drop menu, movies from that category will be displayed. The movies are stored in a 2-dimensional array by category. I've been able to edit my array but I'm having problems with my .AddRange() function. What would I have to put in those parentheses for the list (for each category) to appear in my 2nd combobox when the category is selected?
[code]...
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Jun 21, 2010
I bind the two comboboxes with table. One combo contains product and another contains subproduct. When I clicked first combobox then subproduct of that is filtered in another combo. When I clicked next,previous, it is working properly. But when I go to last record second combo is refreshed means it is not showing proper subproduct. Given the code on 1st combo_selectedIndexChanged. When I go to last record the SelectedIndexChanged event occur.thats why it is not show me last record proper.
Private Sub frmType_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
cmd = New SqlCommand("select makeName from Make where status='Add' or status='Edit'")
dt1 = New DataTable
dt1 = ob.getDataTable(cmd)
cmbMakeName.DataSource = dt1
[Code] ......
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Sep 11, 2010
i have a datagridview with a column with comboboxes. My problem is that the changes that i am doing from comboboxes didn't occur to datagridview immediately but after the user click to another cell.
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May 27, 2009
I have a combo box on a form, it has a large number of values in it (about 40000). When the combo box populates it flickers from invisible to visible for about a second.After investigating this I am sure that it is not the call to the database that is causing this but when the combo is drawn.
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Sep 1, 2011
I have been setting DataSource for a series of combo boxes to the same table as they all display the same options. However, when I ran the project, any change in any one combo box makes all the others 'flip' to the same selected value. This is obviously wrong.
In Access, you have 'Control Source' which is the db field that is bound to the combo box and 'Row Source' can be a query or whatnot that several combo boxes can run 'independently'.Is there an equivalent option in VB.NET? I DO NOT want to manually enter the exact same options many times as that is hard to maintain, to say the least.
Just to repeat: it is not going to work to say DataSource = Row Source. if two combo boxes are set to the same data source, a selection in one automatically makes the other one select the same value. unless, of course, i am missing something.
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May 12, 2012
I need the comboBox to show the data from dataTable but i don't know how to do it. To do that we need to make relationship or what? Like posted another day.
1-Column No.
2-Column Type = mp3, wav, ogg
3-Column CompanyName = CompanyName
4-Column Volt = Volt
How it work when select type for example : mp3 and column companyname it show the volt we have added. the same when we choose mp3 and another companyname it show the volt of that company.
Because i need to know which companyname show the update of their volt.
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Jan 16, 2012
I use VB 2010 Express My problem is:I have two comboboxes one button and one textbox.So what I am trying to do is.Add company names Like EA Games and lets say product name is Crysis.and I want it to show the barcode number of the product n P.I.D?
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Jun 9, 2011
I have a form with two comboboxes ,one text box and a button .I have multiple tables in ms access database with same structure , col1 and col2 .I want to insert text box value into column1 in the table selected from combobox1 and into column2 in table selected from combobox2 such as if i select table1 from combobox1 and table2 from combobox2 and click on the button, data should be inserted into both table1 and table2.when i run the code it , i dont get any error but it does not load the tables in comboboxes
Imports System.Data.OleDb
Partial Public Class Form1
Inherits Form
[code]....
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Feb 11, 2012
unfortunately searching the web i cannot find a decent example that allows me to loop through a winform to make sure comboboxes items are selected.basically what i would like to do is check the form if the comboboxes have been selected if not then highlight them yellow and set the focus on them.
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Feb 6, 2010
I would like too generate a number of comboboxes at runtime and then pass them to a Sub, like this:[code]What is the correct syntax to use to pass the comboboxes collection to the Sub?
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Aug 11, 2009
I have the following class. Basically, i want to populate a bunch of comboboxes. So i want to return an Id and description column almost all the time.
Public Class combodata
Private _id As Long
Private _description As String
[Code]....
how can I return the items as an array. Is converting to an array the best way? I will need to populate a combobox with the returned result
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Apr 2, 2009
I have a vb.net window app that has a number of combo boxes on it. These are being populated from a number of XML files and all this works like a charm. The problem i have is when it comes to putting the comboboxes in a datagridview. I have set up my columns and have set the first column to be a combobox but i'm having problems referencing this so that i can set the datasource to populate it.
I've looked everywhere but cant seem to find how to reference this control. Once this has been selected it will populate a second combo box based on the data from the first. I think i can sort this out, if i could only work out how to set the datasource of the first combo programatically.
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Apr 21, 2012
I'm working on a college VB project using an 2D array with 2 combo boxes. One combo box selects a size and the other selects a style. I have everything working correctly with calculations except I need each combo box to pop up a message box if the user doesn't make a selection in a combo box. It will pop up for one combo box, but not the other. My question is how do I get the program to pop up a message box for each combo box independently? Should I use Try/Catch or would another method work better? (I'm using VB Studio 2010)
Private Sub CalculateToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CalculateToolStripMenuItem.Click
'Retrieve price of selection.
[Code].....
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Jul 22, 2010
I have two relayed tables (teams and players) and two datagridviews. In the datagridview1 i have a combobox with datasource <teams>.In datagridview2 i have a combobox with datasource <players>. In this combo i can see all players. I want to filter and see only the players related to the team of the combo in the datagridview1.
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