Combobox List Using Combobox.List =Array, Item Is Too Long?

Aug 19, 2011

I'm trying to create a Combobox List and I created the following my first try:

Private Sub ComboBox1_DropButtonClick()
ComboBox1.List = Array("LI-3:comparing and contrasting two or more print sources based on

[code].....

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Change List Of Combobox A Based On Item Chosen From Combobox B?

Jun 17, 2011

I am new to vb.net and I am using visual studio 2010. I have two comboboxes on a form, each combobox is set to DropDownList so that a list of items can show in the combobox, but no text is allowed to be entered.

For combobox A, if user chooses item 1, the list of combobox B should be updated accordingly. I think this is quite common on a lot of applications. But I do not know to implement it. I even do not know the keyword to search for the relevant property or event handler.

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Apr 23, 2009

This is my first post so be gentle . I have tried to create form with combo. Combo has source in Access database. What I want is for combo to check user input, if not in list, prompt "Add new item to source table" and if "Yes" add new item (row) to source table. I have been working in Access and this is new t

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Aug 17, 2011

i have a combobox bound to an ObservableCollection:-

<ComboBox Name="combo" ItemsSource="{Binding Things}" SelectionChanged="ComboBox_SelectionChanged" >

in the code behind I have

Dim thingArray = New ObservableCollection(Of Things)
Me.combo.DataContext = Me.thingArray

Assume thingArray is initialized to 5 Thing objects and Thing has a toString() implementation. I want to display the first item Thing(0) by default on the ComboBox. How do i do that?

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Feb 13, 2011

my program downloads into a combobox every item(line) that is in a text file located on a server.
Every line in the text file ends with "a)" or with "g)".

Now I just want to make 3 radio buttons:

- one that will allow the download in the combobox only the item ending with "g)"
- one that will allow the download in the combobox only the item ending with "a)"
- one that will allow the download in the combobox of both (I already know how to do).

How can I do so?

To download the entire list in the combobox I do:

Dim List As String = client.DownloadString("http://mywebsite.com/mytextfile.txt)Dim lines As String() = List.Split(New String() {ControlChars.CrLf}, StringSplitOptions.RemoveEmptyEntries)ComboBox1.Items.Clear()
ComboBox1.Items.AddRange(lines)

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Feb 28, 2011

i seem to have a problem when i try to select a ComboBox item which is a drop down list. The ComboBox contains a list of various items where the user can select from a list, the type of query he/she would like to perform on an Access Database. Two of the items in the Drop Down List are "Employee Sales Between Specified Weeks" and the other item is "Employee Sales Between Specified Months" (without quotation). Now in my VB code, i have a really long If/ElseIf Statement which includes all the options the user can select. Additionally, if the user has selected a week query, he/she must select a From Week, a To Week and a Year (for example week 3 to week 5 year 2009). From Week is another combobox (1-53 weeks) and To Week is also another ComboBox (1-53).When the user selects a month query, he/she should select a  From Month from a ComboBox (1-12) and a To Month from another ComboBox (1-12) and the year from the same Combobox (e.g 2009).

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Mar 7, 2010

I have a comboBox that is populated with a dataset. The values are:

KG - Kilograms
LB - Pounds
and so on.
So when the user clicks the comboBox in the DropDown the user will see:
KG - Kilograms
LB - Pounds
and so on.

[Code]...

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Dec 11, 2009

I have 2 linked DB tables, Artists and Albums using ArtistID as the primary/foreign key.When I want to add a new Album, I have a new form open and I can fill a combobox with the list of Artists to choose from and edit all the details then save to the database.

However, when I want to edit the Album info, I can't seem to get the Artist associated with the Album, as well as all the rest of the Artists from that table, (in case I need to change the Artist associated with the Album).The information required comes from 2 linked tables, so that's where I'm getting lost.An example of this is when a person edits their profile on a webpage, for instance, a list of countries is usually listed in a combobox and the one selected is the country they selected when filling out the form previously, however, they still have the option to change it.

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Apr 20, 2012

i need some help with this problem. i have seen some solutions but written in C and im not that good to convert from C to vb.net.Well i want to 'do something' when i mouse move at an item of the combobox dropdown list.like when i move the mouse over "jkl" make the button1.text = "jkl"when i move the mouse over "def" item make the button1.text = "def"

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May 27, 2012

I have a program that will compare an array of grocery list items glist and an array of coupon item clist.When I compare the two and if there is a match somewhere in the array I want to have a picturebox visible.When there is no match, I want the picture box not to be visible. [code] The code seems to work great until I come to the else statement.When the code finds a match it displays the picture box and the msgbox without error, but as soon as the message box is cleared, even though i've input it as an ELSE statement, the picturebox goes false again.Does anyone have any idea of how I can "hold" the picturebox to stay visible while the match between the arrays exists?

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Jun 14, 2011

[Code]...

I'm making a combobox on a form. I want the combobox to have a list of choices from a table in a db. The two columns are a String and a Date. I want the date column to only show the year. I'm hoping I have the code right as it is above, but I'm not positive I've done the whole date thing right.

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Oct 26, 2009

I want to convert a List (of Long) into a string array.

Reason: it's a list of database IDs and I want to make a comma delimited string to pass into a stored proc.I tried this:

Dim commaDelimitedList As String = String.Join(",", itemIDList.Cast(Of String)().ToArray)

but I'm clearly not using the Cast correctly since it throws an exception:

System.InvalidCastException: Unable to cast object of type 'System.Int64' to type 'System.String'..

Is there a way to get Cast working for this, or am I stuck with ConvertAll and a delegate function?

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Jan 6, 2010

I've been trying to fix this for a while now and have yet to find a solution that works, I want it so that when an item is added another of the same name cannot be added. Here's what I have

Dim i As Integer
For i = 0 To ComboBox1.Items.Count() - 1
If ComboBox1.Items.Item(i) = TextBox1.Text Then
'do nothing
Else

[Code]...

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Dec 4, 2009

I was useing VB a lot for some years ago and now I have started again..then, think I was useing VB3 or VB4 there was a property on ComboBox and listboxes that allows only to select the values in the Combox.. Not able to write own values..

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Mar 22, 2012

I used to have the following code in a module that returned a string array to my main Form and used .addrange to put them into a combobox

Friend Function getPrimeContracts2() As String()
Dim i As Integer = 0
Dim count As Integer = 0

[code].....

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Mar 10, 2012

Instead of a list box, I create a combobox and as I introduced the names she goesby recording and sharing this with other combobox from other forms?

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Oct 26, 2009

How can i get the integer value alone from the combobox list. For examle, if the item in the combobox is "ABC 01", i want to get the value "01" alone into my code for processing. How can i do it?

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Sep 1, 2009

how to list the directories like (c:,d:) in combobox

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Mar 30, 2010

I'm using VS2008, VB.Net and WinForms. I cannot get the combobox droplist to display the most recently added item unless I quit the app and restart. I've searched thru several forums for answers but cannot get any to work for me

Private Sub cboSpecialty1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles cboSpecialty1.KeyDown
Dim objCommand As SqlCommand = New SqlCommand

[code].....

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May 20, 2012

I am trying to make it so when i choose a item in the combo box the list box is cleared i have tried these two codes and i cannot thing of any others but it does not work can someone help me? [Code]

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Mar 19, 2011

I am absolate new to vb.net .can some one help me to write a query that will display list of tables in combobox.using the code bellow i can create table but i want to be able to add all the avilable table names in combobox.Imports System.Data.OleDb Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Cmd As OleDbCommand
Dim SQL As String
Dim objCmd As New OleDbCommand

[Code]...

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Dec 28, 2011

i am making a safari booking system, and i have a combo box list(contains a list of hotels) how do display the prices of the hotels in a text box

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Mar 12, 2012

Is using Public Property the best way to achieve the following.From a drop down combobox, a list of options are available. Each option in the combobox has a number of public properties that need to be associated with it.When a option is selected, the user will then have two buttons that each call a different sub, the appropriate options are passed to the sub.Each option will always have the same properties required to be passed.So I'm looking at something like this.

Public Class Parameters
Public Property server As String
Public Property replica As String
Public Propery path As String
End Class

[Code]...

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Dec 14, 2009

I am a beginner designer in vb.net,, I have designed a simple form,, added a menu with add, update, and delete the records,,In the "delete" form,, I have added a combobox to list the records "StuID" from database,, it is successfully showing,, my query is when building the form the combobox appears empty unless you dragdown the list,, I want that the first record to be displayed directly so that the user knows that there are records in the conbo box,

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Mar 23, 2010

I have created a drop-down list box that holds 8 numbers representing a month span (3, 6, 9, 12, 15, 18, 21, 25 months). In order to prevent users from typing just anything into the text box above the combo box, I changed it to a drop-down listbox. The other requirement that I was hoping to implement was for the user to be able to type a number, after which the selection would jump to the appropriate item (i.e. the user types in '1', and the selection jumps to 12). This partially works. It will jump to 12, for example, but immediately after the user types the '1', the Selected Index event changes. The user cannot scroll down or up after typing in a number.

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Nov 7, 2011

I want to populate my combobox with the list of banknames available in my database.. I tried doing so but I am getting a blank list. i.e.. shows no value in combobox!

Here is what I tried...
Private Sub ComboBox4_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox4.SelectedIndexChanged
Try
'MsgBox("Open")
cn = New OleDbConnection("Provider=microsoft.jet.oledb.4.0;Data Source=E:\Project-Hemtech\HemDatabase1.mdb;")
[Code] .....

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Sep 13, 2010

How can I create images on ComboBox list

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Jan 6, 2011

I want to populate a Combo Box with a list of names and from that have the contact information (address, phone, email, ect..) populate a series of textboxes. The list is roughly 20 names, but it could grow to a hundred or more. Since the contact information changes periodically, I would like a very easy way to maintain it (Excel or Access). 

Update: I am just trying to understand whether I should use Linq (have to learn it) or is there some other way this should be done.

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Apr 18, 2010

problem with my code is that have a list and now need to read that list to 3different list as a title, total cost, currenlty tagged item? this is my code I have made so far:

Public Class Form1
Dim decSubTotal As Decimal
Public g_selected As String
Public m_Name() As String = {"Black Howk Down" & "Fear and Loafing" & "Fight"}

[code]....

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Jul 2, 2009

How should i set the text of the combobox an value other than the items in the list. The combobox has dropdownstyle as dropdownlist

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Jun 7, 2010

How can i set the tool combobox when i write any thing the drop down list goes down and data begins to appear?as Google when you want to search for something it begins to suggest words for you. is it a special tool?

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Jun 16, 2009

I want my combobox when I type letter all item has the letter I have type will show in the combobox.... because in the current situation in vb .net when I type "A" all item that start from a will display I want this time when i a letter "A" all those have the letter "A" will display..

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Jun 22, 2009

I am working on a new winforms application that is receiving data from a WCF service. The programmer has implemented the services like this:Note that this sample is C# but I will be working in VB.NET

[OperationContract]
[FaultContract(typeof(ServiceFault))]
[FaultContract(typeof(ValidationFault))]
[WsdlDoc("Search all cars")]
[return: MessageParameter(Name = "Cars")]
List<Car> FindCars(List<SearchCriteriaItem> criterias);

[Code]...

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Apr 10, 2012

I tryed everyway to do this, I need to know how to make the list of items from a combobox dropdown without a click.And it doesnt work just calling the event...

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Jan 21, 2011

Please forgive, I'm new to Silverlight and am still trying to wrap my head around data binding...

I have a generic list obtained from a class using LINQ. The list has 4 objects, each object consisting of a Letter property (string - A, B, C and D) and a corresponding Number property (integer - 1, 2, 3, and 4).

In Silverlight, I have a combobox control and a text block. I'm trying to figure out how to:

Bind the combobox to the generic list so that the letters populate the combobox.When the user selects a letter in the combobox (say C), the corresponding integer value (3 for this example) is displayed in the text block.

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Jan 5, 2010

How do I get the first item in a combo box list to display in run-time by default? Is it possible to do this with a bound combo box?

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Jul 8, 2010

When we click on drop down combobox control in our windows form, it shows the list automatically. But when we press tab and navigate to that control from keyboard it doesn't shows the list automatically. So in other to show the list automatically on receiving focus what should be done?

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Jun 17, 2010

I have a WinForms applciation, I wrote a function that returns a list of all the controls on the form. The function returns a list of control objects.My target is to fill up a combo box with a list of the control names so that once clicked I set focus to it.So what is the correct code for converting a List(Of Control) to an array of string.

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Jun 17, 2010

Fill Combobox with List of Control names

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Sep 13, 2010

What I would like to do is bind a combobox to my own object which is as follows:

Public Class Categories
Public Sub New(ByVal myConn As SqlConnection)
Dim myConnection As SqlConnection = myConn
myConnection.Open()

[code]....

(I have put breakpoints and I know this object has data.)So on my form how do I bind my combobox to this object? The code I have is below:

Dim bs As New BindingSource
bs.DataSource = New Inventory.Categories(myconn)
cboCategory.DataSource = bs
cboCategory.DisplayMember = "Description"
cboCategory.ValueMember = "CategoryID"

but it returns the following error: Cannot bind to the new display member. Parameter name: newDisplayMember

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May 27, 2009

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[Code]...

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Aug 27, 2009

I have written a function before to delete and update records, but never anything to return values back to my call of the function.  Here is my code, and I will try to explain what I'm trying to acheive.

If Not Att1 = "" Then
Attribute1.Text = Att1
Attribute1.Visible = True
ComboBox1.Visible = True

[code]....

That codes goes on up to att20.  It works just fine, but it is forever long, and I would like to clean it up.I want to do something like:

Or, should I pass the combobox number also, so that the code can fill the appropriate combobox?  Like.comboboxfill(Att1,Combobox1) how to write the function and how to pass back the information or just how to make it work in general?

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Apr 21, 2009

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