Asp.net - List Box Selected Index - Various Items Inserted Depending On The User Selection
Jan 18, 2012
I seem to be having issues with the selected index on a list box.
The list box is having various items inserted depending on the user selection. An example would be:
LiIndex = ListBox1.Items.Count
ListBox1.Items.Insert(LiIndex, "Item1")
LiIndex = ListBox1.Items.Count
ListBox1.Items.Insert(LiIndex, "AND")
[CODE]......................
This all work and displays without a problem. The issue I have is if I select the second of the two AND's. If I click the second "AND" in the list and then a button to fire a method, the selected index is always the index of the first "AND". Dim listIndex as integer = ListBox1.SelectedIndex
I can't work out why, the listbox itself will always show the second one as selected, but the action will happen against the first one.
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May 29, 2009
I know the question is a little choppy and perhaps misleading,but I have a gridview with dropdownlists on the rows. I created an AddHandler and a Delegate for the SelectedIndexChanged and it gets to the sub. Here is the code for that:
AddHandler ddlmgr.SelectedIndexChanged, AddressOf ddlmgr_SelectedIndexChanged
Public Delegate Sub DropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As DropDownList_SelectedIndexChanged)
Protected Sub ddlmgr_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
End Sub How can i get the row's Id if GridView_RowCommand is not called?
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Dec 29, 2011
When .Clear() is invoked, is the memory freed up that was allocated when all of the items were added? I need to load several lists of codes from a database depending on the import selected by the user. Each list of codes will be a List(Of String). My idea is that I will load only small strings into a List(Of String) along with a List(Of <class>) for the data I will be validating and manipulating. When I am done, I want all of the data from the Lists to be purged from memory. Will .Clear() take care of that or does the memory still remain allocated and have to be dumped by the OS once memory gets full? (And, incidentally, what causes the OS to decide which memory blocks to dump? FIFO concept?)
There are so many lists, I'm not sure if I just want them sitting in memory or not. Granted, the lists will just consist of a single string value for each code pulled from the database. So there won't be a ton of data, so maybe I could just load all the validation lists at the beginning of runtime and only worry about purging the data List since it will contain between 35-50 "fields" per record and there will be a couple thousand records each import that is run. I don't want my program to actually cause a hit in performance in the long run. I ultimately don't see a problem because I won't be running millions or even hundreds of thousands of records at once, but I just want to be sure.
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Apr 8, 2011
If i try
ListView1.Sorting = SortOrder.None
ListView1.ListViewItemSorter = Nothing
ListView1.Items.Insert(0, "0")
ListView1.Items.Insert(1, "1")
ListView1.Items.Insert(0, "2")
ListView1.Items.Insert(1, "3")
If ListView1.View is SmallIcon , LargeIcon or Tile it dont work (Display 0 1 2 3). If it's in List it works (Display desired 2 3 0 1).
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Feb 17, 2010
if i pressed the RadioButton .. ENGLISH.. only Teacher's which teach English will be displayed in the listbox and so on. there is in access table called TEACHER which has all these information. i used the following code for displaying the TEACHERS' name in listbox and it worked pefectly but what i want is displaying according to radiobutton checked.
Sub conxn1()
Connection.Open()
Dim da As New OleDb.OleDbDataAdapter("select * from Teacher ", Connection)
[Code]....
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Jun 2, 2010
I have 2 combo boxes. One is in a form called subcat_selector.vb
on the button Pick Sub Catagory.click event it shows the subcat_selector form. form there, the onload event:
Dim button As DialogResult
[Code].....
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Mar 3, 2010
I've been working with a listview. I just need to know how to get the index of the selectedindex otherwise I can't work anything out, if the application doesn't know what is selected... I tried these codes but none tells me the index, I am just lost with it, thought shouldn't be that hard...
Dim index As Integer
Dim item As ListViewItem
lsvOrderDetails.SelectedItems.IndexOf
item = lsvOrderDetails.SelectedItems.Item()
index = item.Index
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Oct 25, 2010
I have just realised that ComboBoxes don't have a Change event. I have a combobox filled with a few items, eg. Bakery, Deli, Fruit & Veg, etc. Choose one of these items, all the related items show in the dgv. However, when I blank the text in the Combobox (press Delete key whilst Combobox has the focus), what event fires so I can blank the dgv? The combobox does not contain a Blank item. Even if it does, the Blank item only fires the ComboBox1_SelectedIndexChanged when the user scrolls down to, or clicks on, the blank value.
I want to clear the dgv when the user blanks the combobox without necessarily changing the selection index.
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Dec 9, 2010
'Get the selected index of the list box 'use that selectedindex for the row of the array and get both the quantity and price into local variables in VB
[Code]...
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Dec 6, 2011
I think I'm having a brain fart on this but I can't seem to figure out why this is not working.
Public Class Radio_Main
Dim RadioDial As String = 1
Dim Go As String = "http://"
Private Sub pb_Tuner_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles pb_Tuner.Click
'My.Computer.Audio.Stop()
[Code]...
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Oct 13, 2009
doing dropdown list selected index changed. I wan to select an item in dropdown list and display in textbox but I got more than 1 textboxes. Is the style sheet (.css) going to hard code by our own. how do I go about starting with it as I am a beginnner using visual studio.
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Mar 16, 2011
This program is supposed to allow the user to check items in a checked list box. If the item is checked, it goes into the Completed List Box on the right. The program then adds the unchecked items to the Pending list box on the left. I keep getting placement values (e.g. O,1,2) instead of the strings (e.g. "Key Returned") in the list box results (see photo attached)
Public Class frmCheckOut
Dim i As Integer
Dim cleaning As String = "Cleaning Inspection"
Dim damage As String = "Damage Repaired"
[code].....
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Sep 30, 2011
In my program I've got several comboboxes that all have the same comboboxitems and when the user makes a selection in one of the comboboxes the selected comboboxitem gets disabled in the other comboboxes. (i.e. If the user has selected the comboboxitem with value 'a' in combobox #1 and selected the comboboxitem with value 'b' in combobox #2 then in remaining comboboxes both the comboboxitems with values 'a' and 'b' are disabled)
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Oct 17, 2011
I want to build my own class. In it, I need to recreate a behavior we can see in DataTable and in some other places : accessing items by their name or by their index. [code]...
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Oct 17, 2011
I want to build my own class. In it, I need to recreate a behavior we can see in DataTable and in some other places : accessing items by their name or by their index. How can I reproduce such a behavior. Here's what I mean :
'Here's one way to access the data
A = MyObj(0).value
'Here's the other way I would like to acces it
A = MyObj("Blablabla").value
How can I create my class so I can access items in an array (or list preferably) by it's index or an unique Name?
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Oct 17, 2011
I want to build my own class. In it, I need to recreate a behavior we can see in DataTable and in some other places : accessing items by their name or by their index. How can I reproduce such a behavior. Here's what I mean :
[Code]....
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Dec 20, 2011
I am using visual studio vb 2005 and I searched the forums for an answer to this but didn't find exactly what I was looking for. I am using the following code to populate a list box. What I want is to have a datagrid view show the results of a dataset that is generated when a user selects something from the list box. I know how to generate the dataset, but I'm not sure how to bind that to a datagrid view and I'm not sure what event I should use from the list box.[code]
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Jul 9, 2011
I want to move a selected item up and down on a listview.I thought by getting the index and -1 or +1 would work .But can't find the code to define the index of a row.
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Apr 10, 2009
I have a listBox called fairsListBox. By question is how can I but into a List the items that are selected from the fairsListBox?
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Apr 4, 2012
How do you count the amount of values in a list box that are selected, rather than all of those within the list box? I need to get the number and then make it a string. Once i have the number i can change this easily to a string
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May 25, 2010
How do i remove a selected item(s) from a list box called "LeftList" and add it to a second list box called "RightList"
[code]...
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May 12, 2011
how to get the selected items from a check list box...i have 7 items in it, need to see which ones are selected...and how to clear the checks from the list box?
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Mar 4, 2010
I'm building an online shop, but have run into a problem.When the user click that they want to add a product to their basket, i add the product ID to an array that is held on the session.This all works great and i display how many items they have selected etc..The problem comes when i get to the checkout page.Whats the best way of displaying the items that the user has selected?
should i use a datagridview? if so, how do i pass the array into the SQL in order to get all the data rows that i need?
should i use a repeater? this gives me the same problem as above though.I just cant seem to work out how to get the values fro the array and then run the sql for each ID to get the information to show on the screen.I could loop through the array using each ID as a parameter in the SQL but then where do i put the data? in a dataset? a datatable?
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Apr 29, 2011
I've got a Checked List Box full of PC names that the user can check. I've also got a Combo Box that lists the location of the PCs - if the user chooses one of the locations in the Combo Box, it automatically selects all of the PCs in the Checked List Box that are at that location.
However, if that group of PCs are way down the list in the Checked List Box, you can't immediately see that they were checked.I'd like to know if there was a way to have the application automatically scroll/jump down to the area of the Checked List Box containing the PC's that were just checked.
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Jul 14, 2010
I have a web page where I am trying to populate the PSI # into the txtPSI depending on which customer is selected in ddlCustomers.I have written it a way it has worked on a past project and it compiles with no errors, however it doesn't work when it runs.
The code adder is not working so I had to add it manually.
Protected
Sub ddlCustomers_SelectedIndexChanged(ByVal
sender As
[code]....
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Jun 30, 2011
Could not find this through Google or in SO questions.I have a checkbox listbox on my form. I want to filter my List by the list of selected Ids from that listbox that are checked, in SQL I would have done this like "Where TypeId In (1, 4, 5, 7)"... how do I do that in LINQ?
I feel like I am missing a really obvious answer, but cannot get it.
For argument sake... here is the what I have for sample data:
In Colors (List<of currentColors>)
ID, Name, TypeId
1, Red, 1
2, Blue, 1
3, Green, 2
4, Pink, 3
Selected Types 2 and 3 in CheckboxList: filteredColors
[Code]...
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Aug 9, 2011
building simple program that i could print index pictures to 11x17 size paper. and came across with listbox multi items selected and wanted to add them to different picture boxes?
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Feb 11, 2012
I have a form with a combobox and a textbox. The combobox is used to select a username and the textbox displays the staff No. I use the following code to populate the combobox.Private Sub DeleteUser_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
[Code]...
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Feb 19, 2011
I want to know if it is possible to generate a php file depending on selection on a win form in vb.net 2010. If so, does anyone has a link to a sample.
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Jul 18, 2012
i have a DB table and a form the following fields , combobox and textboxes, what i need is how to write a query to retrieve data from the table when the user select some record from combobox
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