VS 2008 Databound Listbox Selection?

Mar 17, 2011

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.

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Databound Combobox Selection Retention

Apr 20, 2009

On my form I have three fields and a datagrid view.One field is a combo box.All fields are databound.The datagridview is a detail grid, bound in the "normal" way. Scrolling through records, etc., all work fine.What doesn't work is when a selection is made using the combo box.The underlying table has a self-join of one-to-many: ParentID, ChildID. ChildID is the main ID for the underlying table.Children may have a parent This is just by way of example.So, the combo box's Value is bound to ChildID, and the SelectedValue is bound to the ParentID.On the form one chooses the Parent with this combo box.When I test this arrangement, I select a Parent, then click Save (using the default toolbar actions). However, the combobox seems to "reset" the selection to the first in the list.

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VS 2005 Selection Of Databound Combobox Is Locking?

Mar 23, 2011

here is the situation i am using the combobox with the databound dataset..i produce two combobox for that one field because i need to display the selected data in separate tabs... the combobox 1 is working perfectly i can select all data i want to but in the combobox 2 i can only see those data and when i select data on it, it will not display the selected data.. it still remain on the previous displayed data...

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Databound ComboBox Need To Force Update In Datasource When Selection Changes

Apr 5, 2010

I have a combobox where the SelectedValue on the combo is bound to a property on a business object.Everything works fine, but the property that's bound to the SelectedValue on the combo only gets updated when the focus leaves the control. I understand that the property doesn't get updated until the control is validated (loses focus), but I need it to update the datasource as soon as the dropdown is closed.I know I could probably leave focus from the control on the DropDownClosed event but I'd prefer something a little less kludgy.What's the best way to immediately update my datasource when the dropdown is closed?

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Listbox (20 Items) With Multi-selection And Label That Disply The Selection And One Button

Dec 25, 2010

I have a listbox (20 Items) with multiselection and label that disply the selection and one button. So I wrote (it works fine)

[code]...

Now when I click on button the label show lets say Item2,Item5,Item10,How do I take off the last ","

somthing like that Item2,Item5,Item10

I used to do: Dim s As String = Trim(Label1.Text)Label1.Text = s.Substring(0, s.Length - 1) but it give me an error converting intiger to string

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Moving Data From Databound Listbox To Other Listbox?

Mar 2, 2012

I've pretty much just started in playing with Visual Basic Studio 2010 and have been using this site for lots of answers so thought I'd join up and harass more directlyI've been trying to move items between two lists, one is databound to a bindingsource, the other isn't. I found out that you can't really move items from databound lists, but you can remove from the datasource instead. This works fine until I want to move the item back - it fills a blank line with seemingly no data.

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VS 2008 Fill ListBox From Combo Selection

Apr 23, 2009

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?

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Databound Listbox Not Updating?

Mar 13, 2011

I have a Listbox which is to display a list of product names which it reads from a database table, bound using the inbuild datasource/databinding stuff..however when the product names are updated/more are added in the table etc no change is reflected in the Listbox! only the initial names from when it was first bound appear, how to fix this?

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Cannot Assign Selectedindex To A Databound Listbox If It Has No Parent?

Mar 22, 2012

It appears that I cannot assign the selectedindex for a databound listbox if it has no parent, but I can do so if I have populated the list "manually" from the same datatable. In my code example, the "if" line toggles between loading a list via data binding and loading a list "manually" (both use the same data table). In each case I attempt to set the selected index afterwards. With manual loading, the selected index is set; with data binding, an error is thrown (which can be avoided by assigning the listbox a parent, but the "manual" equivalent doesn't need this). Is this a bug?

[Code]...

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Adding An Empty Row To A Databound Listbox Using Linq2SQL And Winforms?

Sep 28, 2011

what is the most robust method for adding a empty row (to select "nothing") to a ListBox?

Dim List = Enumerable.Repeat(New TABLE With {.Text = "", .ID = -1}, 1).AsQueryable().Union(From t In mainctx.TABLEs)
ddlMangelKategorie.DisplayMember = "Text"
ddlMangelKategorie.ValueMember = "ID"
ddlMangelKategorie.DataSource = List.ToList

But this has some drawbacks:wordy must explicit write the Type (TABLE in this case), so i cant wrap this in a function have not found an solution, which works with anonymous types I.e. if I add a From t In mainctx.TABLEs Select Text=col1, id=col2 to the query, this method does not work anymore.

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How To Limit Listbox Selection

Nov 19, 2009

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

[code]....

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Listbox Use - Allows A Checkbox Selection

Apr 1, 2009

I have been given the following piece of code which allows a checkbox selection to be made and an associated piece of text be printed in a textbox.

How would i be able to do exactly the same thing but for a listbox?

Also how would i be able to get something to clear from the listbox when then checkbox is unchecked without getting to complicated?

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Random Selection From Listbox?

Apr 27, 2010

I have a listbox with five items

I am trying to code a button that will randomly choose one of the items and then display in an output textbox

textbox code so far
txtOutput.Text = "The computer has chosen " &

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Calendar Selection Output In Listbox

Jan 16, 2009

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]

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Cannot Display Database Selection In Listbox?

Aug 24, 2009

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]...

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Limiting User Selection In ListBox

Apr 30, 2011

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] .....

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Load Picture Through Listbox Selection?

Mar 3, 2011

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]....

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Populate A Listbox When A Selection Is Made

Feb 23, 2011

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.

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Populate Listbox Without A Default Selection?

Feb 3, 2011

Can you populate a Listbox and not have a default item selected?(Usually I see the first item in the list automatically selected at creation).

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Setting Default Selection For Listbox?

Jun 10, 2009

how do i make it say that on form load, the first item in the listbox is selected?

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Store A Listbox Selection In Appconfig?

Jun 22, 2009

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?

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Storing Information To A Listbox Selection?

Dec 21, 2011

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.

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VB Random Selection In Listview, Not Listbox

Jul 29, 2011

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)

[Code]......

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Vb2010 Regarding Listbox Items Selection?

Apr 10, 2011

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

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VS 2010 Clearing ListBox Selection

Sep 24, 2011

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.

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VS 2010 Html Listbox Selection

Jun 11, 2011

how to set an option to html listbox in current options to an html website with Visualbasic.[code]

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Changing A Label Value Based On Selection In A Listbox?

Dec 11, 2009

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.

[Code]...

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Combobox Selection Alters Listbox Contents?

Feb 22, 2012

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.

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Forms :: Listbox Selection - Navigate With The Up And Down Arrows?

May 10, 2010

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.

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Listbox Selection With Extracting Data From Database

May 12, 2012

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.

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