.net - Getting The Index Of Deleted Item From Bindinglist?
Aug 7, 2009
I am able to get the index of items added to the BindingList. When I try to get the index if the deleted item I get the error Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
Here is my code
Private Sub cmdRemove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdRemove.Click
For i As Integer = 0 To _assignedSelection.SelectedCount - 1
Dim item As Jurisdiction = CType(_assignedSelection.GetSelectedRow(i), Jurisdiction)
_list.Remove(item)
Next
End Sub
Private Sub list_Change(ByVal sender As Object, ByVal e As ListChangedEventArgs) Handles _list.ListChanged
[Code]...
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May 27, 2010
I am trying to write a function that has an object parameter. That object will always be an BindingList. That BindingList will be of some unknown (at design Time) class. I think I've figured out how to get the type of the collection object, but now here the tricky part. I'm trying to create a function that can handle any type of collection and be able to return an item from that collection. I need to create a new object of that type and return it from the function. [Code]
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Apr 1, 2009
i have a bound datagrid that allows users to delete & edit records within the grid using 2 buttons. delete deletes the record from the datatable. edit takes the cell values and places them in controls outside of teh datagridview for teh user to update, they then click an update button (outside datagridview) which updates the datarow
i delete a record using the dt.Rows[e.RowIndex].Delete method so that i can use the Rowstate property to do a final update on all records the problem arises when i delete a record then go to edit a record the CurrentRow index is incorrect as it still see's the deleted record.
if i delete the first record in the grid, then go to edit the next record (which is now rowIndex 0) i get an error saying unable to update deleted row contents
i then tried to use the defaultView property of the datatable when updating the row - which will update the row on screen but when i go to do the final update it see the modified row as its original deleted rowstate.
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Feb 12, 2011
I'm having some difficulty with a sorted & grouped listbox in WPF vb.net 3.5 that has an items source bound to an ObservableCollection.
What I want to be able to do is to retrieve a piece of data from the ObservableCollection items source depending on what item in the listbox the user has selected.I've almost got it working but because the listbox is sorted it does not match the index of the items source.
[code]...
As I previously mentioned, because the lstBox is sorted and also grouped the index's don't match up.Does anyone know how I can get the correct information I want from the List Source depending on the selected item in the list box?
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Nov 30, 2011
1.) I have a CheckedListBox, ListBox, Button, and ComboBox on a form. There is two ways users add items to the CheckedListBox listed below.
A.) The user will select one item in the ListBox and click the Button and that selected item is added to the CheckedListBox (see code below).
Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button.Click
' ensure searched analytes checked listbox always contains (Select All) at the top if analytes exist in the list
If Me.CheckedListBox.Items.Count = 0 Then Me.CheckedListBox.Items.Add("(Select All)", True)
[code]....
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Mar 18, 2011
How can I get an item of a specified index form listbox in a messagebox without selecting any item in listbox.
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Mar 28, 2011
i am trying to find a way to add something to one of the columns in my listview. The way my code is setup is like this:
While dr.Read()
If dr.IsDBNull(12) Then
objItem = lstMaster.Items.Add("nothing")
[code].....
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May 15, 2009
Is there any way to get the index of the changed item? I couldn't find any examples.
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Aug 19, 2010
In simple terms, I want to compare the value of a databound listbox display member with another string. However; I need to convert the listbox databound items to an array first as I may have to do 1,000's of comparisons on this.
I have a databound listbox from a sql server table that populates fine. I'm trying to retrieve the display value of a listbox item without selecting the item. My goal is to compare items in listbox1 with items in listbox2 and if item is in listbox1 matches an item I want to load into Listbox2, then I do not add the item to Listbox2. Listbox 2 is not databound but contents I'm loading come from a datatable.
So, I iterate through the items in listbox2's datatable but as I'm adding the items from the datatable to the listbox2, I check if the item exists in listbox1. The data that is being compared is the Displaymember of Listbox1 and a string value I want to manually load into listbox2.[code]....
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May 26, 2009
I am using the stack class to store a collection of lines. <code>Dim myStack As New Stack(Of Line)</code> I want to find out what the index is of one of the lines that are in the collection and I'm not sure how to do this. i tried to use array.indexOf:
[Code]...
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Mar 10, 2010
I'm having a small hiccup in the following code. Basically what I have going on is a play button that will play the selected item in the listbox and once the button is clicked then the next item in the list is highlighted and waiting. This works exactly like I want it but the only issue is when it gets to the last item in the list it want play it.
Private Sub ButtonPlay_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonPlay.Click
If (PlaylistBox1.SelectedIndex + 1) <> PlaylistBox1.Items.Count Then
AxWindowsMediaPlayer1.URL = PlaylistBox1.SelectedItem
[code]....
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Apr 9, 2010
How do I remove an item from an array at a specified index? This code copy's the index and then adds the indexes until it gets to the one you want to remove, skip it, and try to continue. But I get so many errors. From being out of the bounds of the array, to just being null for some odd reason. [Code]
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Jan 31, 2011
How do i return the column index of an item within a WPF Datagrid, when I click on a cell I'm using Visual Studio 2010/VB.Net?
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Apr 19, 2011
I want to perform some simple auto-formatting to the cells in my GridView. So far, I have the following code:
Private Sub gridviewRefreshPanel_RowDataBound( _
ByVal sender As Object, _
ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) _
Handles gridviewRefreshPanel.RowDataBound
[Code]...
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Jun 30, 2010
In a list of timers, how do I determine the index of the item that elapsed without having to iterate the collection as shown below (e.g. can I pass a paramater to OnTimedEvent, or can the collection raise an event to say which item fired???). It's the individual timer index that I need as I'm using it to refer to something else.
(I wont know how many items I'll have in the list in advance so I can't create an individual event handler for each timer - I don't think I should even if I did).
Public Class Form1
Private _timers As New List(Of System.Timers.Timer)
Private Sub Form3_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[code]....
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Jan 31, 2011
I have set my listview multiSelect = false, view = details , FullRow select = true , HideSelected = False. I have one coulumn which has 10 items . I want to get the selected row index in vb.net
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Feb 6, 2010
I have a combo box setup with 4 items, with indexes ranging from 0 to 3.
Later in my code, I need to do a certain event depending on what is selected. To do this I thought about comparing what the index of the selected combo box item is, because integer comparison is faster than strings, right?
how I can grab the index of the selected value?
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Sep 8, 2009
How to put a tab index for each item in the radio button list?
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Dec 27, 2009
If you wanted to remove a listview item, then reinsert it at the same index it already was. Is this possible?
Because all i know how to is reinsert an item at the top.[code]...
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Apr 20, 2010
I want to return a value of a ListBox item, NOT the index number.
My attempt: Dim pInt1 As Integer = ListBox2.Items.Item(0)
i want this code to return the ListBox item's integer value, and not the index number itself how can i return a ListBox item's value?
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Jan 30, 2011
what im trying to do is loop threw all listbox items until the listbox item contains say "panda" and stop and give me the index of the item that contains "panda"so i would end up with panda`s selected index
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May 21, 2010
Right now I'm using the following code in my markup[cod]e...
I would like to be able to call it by index instead of explicitly by "SpeakerName". Is there a way to do this in ASP.NET 4.0?
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Jan 18, 2012
I am trying to use datasource and bind in my application to set a dropdown list to the results of a query. The dropdownlist populates correctly (shows each different type_name in the set) but later when I use ddltype.selectedvalue - I am always getting the value from the first item in the dataset. Here is the code.
[Code]...
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Jan 20, 2010
I am trying to have the index value of a selected item in a combobox returned to a variable. Then, if the variable = 1 (which would be the index of th second item in the combobox), I want a groupbox to be hidden (be invisible) on the form. Here is my code...Getting an error that says:
'ListIndex' is not a member of 'System.Windows.Forms.ComboBox'
Code:
Private Sub cbxAccounts_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
Dim selection As Integer = CInt(cbxAccounts.ListIndex)
If selection = 1 Then gbxCheck.Hide()
End Sub
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Dec 2, 2011
[code]I want to print the parent item index inside the child repeater (rptAlternativas) in VB right in ITEM_INDEX_HERE marker. How can I achieve this?
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Jan 20, 2010
I am trying to have the index value of a selected item in a combobox returned to a variable. Then, if the variable = 1 (which would be the index of th second item in the combobox), I want a groupbox to be hidden (be invisible) on the form. Here is my code...Getting an error that says:[code...]
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Nov 19, 2010
I have a checkedlistbox to which a dataview is set as its datasourceI also have a string array that contains valuemembers which need to be matched to the items in the checkedlistbox, of which if complying the checked state needs to be se
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Feb 15, 2012
highlight listview item from mysql search statement then get the index?
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Jun 7, 2012
First of all, I'm a somewhat-experienced VB3 Developer, and I'm trying to convert a VB3 app to VB.NET.I got the programming guide (http:url....) by searching the web.The problem I'm having is the syntax for .NET is way different than VB3, and that's OK, but finding the correct syntax is very difficult.I'm trying to eliminate duplicates in a ListBox:
When I access the Programing guide, I see that:
ListBox.SelectedIndex Property
Gets or sets the zero-based index of the currently selected item in a ListBox.I also have Murach's and Stephen's manuals, and they say the same thing.Visual Studio converted The old .ListIndex to a VB6 Function:
If VB6.GetItemString(PlayList_ListBox, I) = VB6.GetItemString(PlayList_ListBox, I + 1) Then
This is Try #1. It generates: VB6 is not declared. It may be inaccessible due to its protection level.Then I read that VB6 is only for converting old code.So then I tried SelectedIndex:
Dim I As Short [code]..........
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May 10, 2009
i have this..
ListBox4.SelectedIndex = 0
Dim mrc As Integer = ListBox5.FindString(ListBox5.Items.IndexOf(ListBox4.SelectedItem))
ListBox5.SelectedIndex = mrc[code]....
What im trying to do is, Make ListBox5 select the index of ListBox4 Selected Item (The Matching Ones).. example:I have the files of the same in two listboxes,Then in ListBox4, it selects The first Item (Got that bit),Then it selects the item of the exact same string as listbox4 selected item to select in listbox5..
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