Should Changing The Parent Of A Listbox Change The Selected Index

Mar 22, 2012

You wouldn't think so, but it does when the listbox is bound to a datasource (as far as I can see).

I've reduced the behaviour to the code below. 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 set the selected index afterwards, and then change the parent form. With manual loading, the selected index is retained, with binding it is lost. I cannot see how this makes any sense - I don't see why changing the host form should alter any property of the list. Is this a bug?

Public Class Form1
Sub main() Handles Me.Load
Dim ListControl1 As ListBox = New ListBox

[Code]....

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.net - Listbox.selected Index Change Variable Assignment?

Apr 3, 2011

What is the correct way of assigning the selected index's value from a listbox to a variable? The user selects an item in a listbox and then the output changes depending on their selection.

I use:variablename = listbox.text

in the listBox_SelectedIndexChanged event and this works.

When I use the button_click event I use:

variablename = listbox.selectedindex

But this does not work in the listbox_selectedindexchanged event.you let me know if it is okay to use it like I did above or if I will run into problems and why you cannot use the selectedindex method.

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Converting Listbox.selected Index To Hex?

Jul 18, 2010

I need a way of converting the listbox.selectedindex into hex and then writing it to a file(The writing is done using PackageIO.writer). The weird thing is the code i use works for most of it but on some of the writes and conversions it just converts the selectedindex to 00 when its not.

Dim Writer As New PackageIO.Writer(Filepath, Endian.Little)
Writer.Position = &HE24A
Writer.WriteUInt16(Convert.ToByte(ListBox3.SelectedIndex))

[code]....

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Find Selected Index Value Of ListBox?

Oct 10, 2011

I have loaded datatable to listview.Now when i try to do a selected index and retrieve data to display in respective text box. I find some error "input string format incorrect".but when i directly load from folder it works fine.

Data that retrieved from Datatable.Im not able to find the index of the row. But from folder and listed in ListView.Index value is found.

Dim breakfast As ListView.SelectedListViewItemCollection = Me.LOV.SelectedItems
For Each item1 In breakfast
index += Double.Parse(item1.SubItems(1).Text)
Next

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For A User Control With A Listbox Expose The Selected Item To A Parent Page?

Oct 27, 2010

I have a simple user control which wraps some logic around an AutoCompleteBox. This question could apply to any ItemsControl control like a dropdown or listbox though.

<UserControl>
<Grid Background="White">
<sdk:AutoCompleteBox Name="myACB" ItemsSource="{Binding myData}" />

[code].....

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SelectedIndex : Gets Or Sets The Zero-based Index Of The Currently Selected Item In A ListBox?

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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Changing TextBox Text Based On Selected Value In Listbox?

Oct 12, 2011

When a SelectedIndex in a ListBox is changed I would like a textbox below the listbox that gives a description to be populated with the value from a description field in SQL.I have the following code so far, but I get an error that says "Must declare the scalar variable "@ReportName"

[code]...

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Winforms - .net, Combobox.datasource Will Change Selected Index?

Mar 1, 2012

Let me try to describe my problems in the simplest way: I have combobox1 and combobox2. I hope to achieve two things: Combox1 is bound to list1 (a list of string). When a user selects an item in list1, list2 (a list of string) will be obtained from database and combobox is bound to list2.If user specifies text1 in combobox1 and text2 in combobox2, then these two values will be shown in the comboboxes regardless of the bound lists.

[Code]...

So the results of above code is that goal 1 is achieved, but goal 2 is never achieved. combobox1.selected index is always 0 and combobox2.selected index is always 0 too.

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Windows - Selected Index Value On Text Change Property - Performance Hit

Aug 2, 2011

I am working on windows application form I am having one text box and Listbox. I want if user type on textbox, then List box item is going to be selected, that is working fine. List Box has more than 10,000 records. It takes time to select item from ListBox, while write data in textbox.

[Code]...

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.net - Windows.Forms.Listbox Selected Item Font Size Is Changing?

Jan 4, 2011

I have inherited from a Windows.Forms.Listbox so I could override the OnPaint and OnDrawItem methods in an effort to highlight specific items and alternate backcolors. I am also skipping some DrawItem events to prevent flickering.Everything is working fine, however when I select items in the listbox, it looks like the font is shrinking or becoming more compressed.Then when I mouse leave, the font goes back to its normal size and appearance but the same items are still selected (which is correct). During debugging the font never changes nor do any of its properties, but it does end up looking different when the item is selected and the mousedown event just happened.

Public Sub New(ByVal relativityHighlightColor As System.Drawing.Color)
_relativityHighlightColor = relativityHighlightColor
Me.SetStyle( _
System.Windows.Forms.ControlStyles.OptimizedDoubleBuffer Or System.Windows.Forms.ControlStyles.ResizeRedraw Or

[code]....

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Asp.net - Changing Repeater Label On Treeview Selected Node Change?

May 21, 2012

I have a repeater control with item template like this:

<ItemTemplate>
<table width="70%">
<tr id="rowSIC" runat="server">
<td width="10%">

[code]....

I have a treeview on this page of which each node has and Id and value. on selected node change event, I want to change the text of repeater selected node. I am writing code like this:

Protected Sub TreeView1_SelectedNodeChanged(sender As Object, e As System.EventArgs) Handles TreeView1.SelectedNodeChanged
Dim EmployeeRepeater As Repeater = CType(Me.Form.Controls(1).FindControl("Repeater1"), Repeater)
Dim EmployeeRepeaterItem As RepeaterItem

[code]....

But It is not chagging MyLabel text. How to fix it ? Both treeview and repeater are populated in !Page.Ispostback event?

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Listbox Selected Item Color Change?

Feb 26, 2010

I am inserting the data through textbox of the selected item of the list box I want the when the user will input the data into textbox and then pressing the insert button the the selected item of list box (selected item only color change) color change white into blue or red.

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Change Color Of Selected Item In Listbox When Button Clicked?

Apr 7, 2010

How would I go about changing the color of a line of text in a Listbox when the user clicks a button? I have tried using ListBox1.Items(ListBox1.SelectedItem).Forecolor = Color.Gray, but I receive the error "Conversion from string "Mathematics 1" to type 'Integer' is not valid."

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Change Selected Listbox Items Format To Bold At Run Time?

Feb 24, 2009

Is it possible to change the text format of a ListBox selected item at run time?

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Print Directory Parent Index?

Aug 24, 2010

I have directories like below,

Root
|
A B
| |

[Code].....

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Dynamically Get User Control's Parent Tab's Index?

Apr 14, 2012

I have a user control that is created within a tab control every time a user creates a new tab, so each tab on a tab control contains a new instance of the user control. From within the user control I would like to get the parent tab's index, so that I can dynamically alter properties of the tab, such as the tab's title.

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Pass Listbox Index To Another Listbox To Insert Value Via Inputbox Or Another Form?

Sep 20, 2011

what it does iswhen a user checks an item in the checked list box it transfer it to a listboxso i have a checked list box and a listboxi am planning to put another listboxwhat i would like to be able to do is thatwhen the user checks an item on the checked list box it will transfer the item into the listbox [like the one on my previous thread]and be able to show an messagebox with a textbox [ i read its called an input box ] or another form with a textbox and/or combo box will pop up

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How To Get Parent Item Index Inside Child Repeater

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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Change An Item In A Selected Item Of A Listbox?

Dec 9, 2011

I am trying to change an item in a selected item of a listbox.

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Index Error "InvalidArgument=Value Of '2' Is Not Valid For Index" For ListBox

Oct 16, 2011

Im just going to have to get used to this language for the rest of the semester And smohd, I will get back to you with my problem. That "Me..." control is so random. Not like JAVA Why am I getting an error with totalGrade

[Code]...

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Validating A Textbox When Changing Tabcontrol Index?

Jun 8, 2012

how to validate and save the results of a textbox when I change to another tab on a tabcontrol?I have found the SelectedIndexChanged and LostFocus but they do not tell what was the tab that has been previously selected, so I then can do that validation and save. is there an event that triggers before the SelectedIndexChanged?

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Change A Drop-down Menu In VB From Click-to-change To Just Change When Selected?

Feb 4, 2012

I'm using Visual Studio 2010 / VB / dot net 4.0, and I have a drop-down menu in my left column that switches resource languages for the end user. It reads like this:

--------English ------- <<- Engish is always the default top language option
French |
Spanish |

[code].....

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.net - Datagridview Column Index Changing When Binding To A Datatable?

May 16, 2012

i have two datragridviewcomboboxcolumn,and two textbox column in a datagridview.each combobox column is binded to separate binding source.

column names are sl_no,col_empname,col_empworktype,Col_Hours etc.and
displaymember,datapropertyname,valuemember and for comboxcolumn are
col_empname:-emp_name,emp_id,emp_id
col_empworktype:-worktypename,worktypeid,worktypeid

[Code]...

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Function Call Triggered Automatically When Changing Index In A ComboBox?

May 8, 2012

im wanting to add a new feature but am unable to even get started. I'm in a windows form in visual basic .net and basically, I have a combobox with 3 items in the drop down menu. I would like to make it to where the moment one of the items in the combo box are selected, the program recognizes the change of index and automatically calls to the function of my choice.

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Get Last Selected Index In ListView?

Jan 31, 2012

I want to know How to get The last selected Index in the multi select of ListView.For example, when i select Item from index 1 to 10, so I get index 10 as the last selected index.But if i select Item from 10 to 1, so I get index 1 as the last selected index.

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Get The Selected Index From A Listview?

May 3, 2011

how to get the selected index from a listview i know you can do the "ListView.SelectedIndices.Item(0)" but then you still need to know the index of the selected item.

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Get The Selected Index Of The List Box?

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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How To Get The Selected Index In ListView

Oct 19, 2011

Can any one tell me how can i get the current selected indel in the ListView.

I need to execute a code every time the selection changes in ListView.

I have listView with only one column. All the list will be in column 0.

I used the below code in Listview1_Click event and able to get the selected index value,but when i used the same code in the Listview1_SelectedIndexChanged and Listview1_ItemSelectionChanged its giving below below error Private Sub ListView1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListView1.Click

[Code]...

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List Box Selected Index?

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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TabControl + Selected Tab Index

Jul 22, 2009

I drag Tabcontrol.& add two tab pages. I have contextmenu Strip, dat i bound to tabcontrol.I select the ContextMenuStrip & set it to ContextMenuStrip1

Now i right click on tab headers.Suppose i right click on tabpage1,contextmenu is displayed.I want that when i right click on tabpage..I want to get the index of that tab..Even if dat tab page is selected.[code...]

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