I have a listbox that contains numbers that vary from 0 to 99. My problem is when the number in the listbox is 0, listbox1.selectedindex will not return a value. So I cannot use removeat(x) which works for all other numbers. Can anyone give me an idea on how to do
View 4 RepliesI click on items in my listbox and then hit a submit button, but when istep through my button_clicked code it doesn't detect any selectedindex. All controls are in the same form and there are no panels. Why can't I detect what items were clicked on in the listbox?
View 2 RepliesI have a listbox and two buttons. Each of my button is labeled UP and DOWN. When I press UP, the current item in my listbox will be moved one level (or index) up and when I press DOWN button the current item goes one level down. I have been trying to manipulate the selectedindex property but it isn't working.
View 11 RepliesI've got a simple upload form. Here's my code:
<form id="Form1" method="post" enctype="multipart/form-data" runat="server"
<asp:label id="lblMsg" runat="server" CssClass="msg" />
<span class="msg">Select Gallery:</span>
[Code].....
I have a form with a dropdownbox two listboxes and two buttons on it. I removed a "select" button as I just used the DropDownList1_SelectedIndexChanged, but the event would not fire until I used the suggestion from:Why DropDownList.SelectedIndexChanged event does not fire?
It involved changing the AutoPostBack='true' and EnableViewState="true" properties
So now the DropDownList works but with the two listboxes, the SelectedIndex stays as -1 and does not change even when selected.
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I think it has something to do with post backs, page_load or the selectedindex changed event of the listbox, it worked perfectly before I made the modifications.
I need to make events based on which index is selected in the listbox. I was wondering if there was an inbuilt function of if I need to use If conditions.
vb.net Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
That code will run when the selected index is changed regardless of which index. But I need each index/row to run a different event. I know I can use If conditions to get what I want, but I expect it'd be a lot more efficient with an inbuilt method.
I have a listbox of the 50 states. I have one textbox and as I enter the first few letters of the name I'm supposed to use the SelectedIndex property of the listbox to display the appropriate name. I am not very good at programming at all. Is this a quick and easy thing to do and if so how is it done?
View 5 RepliesIt 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?
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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]..........
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?
In my code I have to create a listbox and a form as its container. After adding a few items through code I am not able to make code return a Selected Item when I select the item manually; it always returns the las item added. However ther is no such problem with returning the Selected Index.
View 8 RepliesI have the following code;
txtprojnameupdt.Text = txtProjname.Text
cmbactiveproj.SelectedIndex = cmbactiveproj.FindStringExact(Replace(txtprojnameupdt.Text, "'", "''"))
[code].....
I have a dropdown list that I am binding to a datatable. Here is the code I am using to do it:[code].....
Unfortunately, the line ddlBuildAddr.SelectedIndex = addressId is failing. Looking at this line through the debugger, the SelectedIndex goes to -1, while addressId goes to 2. What gives? Why would the assignment operator flatout not work?
Is this possible? I programatically change the selected index when a certain event is fired using this code:
DropDownList.SelectedIndex = DropDownList.SelectedIndex + 1
Now I want to update a corresponding textbox with the text that is in the new SelectedIndex of the DropDownList via postback.What's the easiest way to do this?I know how I can do this in javascript.... I was just wondering if i could do this in the VB code behind.
My understanding is that if you set a ComboBoxes .SelectedIndex to -1, it should unselect any items in the ComboBox and show nothing in the ComboBox text. This is not happening. How can I get that to happen?I have 10 items in the Combobox. Let's say the index is set to number 5 and the text says "MasterCard". Now through code I want to set it to -1 and the text should show nothing. How can I do this?
View 15 RepliesI have a DataGridViewComboBoxColumn that I allow the user to add new items to by typing in the ComboBox and hitting the 'Enter' key. That triggers CellValidating and I do the adding there by the following:
cmbColumn.Items.Add(e.FormattedValue)
All this works well, except that it leaves the DataGridViewComboBoxColumn blank. How can I set the DataGridViewComboBoxColumn to display the e.FormattedValue?
As you know by question that what i want. i was using listbox. In Listbox we can get selected item by a simple line of code:listbox1. selectedItem. now i am using ListView, how i get the SelectedItem or Selectedindex of ListView.
View 3 RepliesI have a list box with over 50 words. I would like the user to be able to type the first few letters of the word in a text box, and the program would automatically set the SelectedIndex property to that word in the box.
View 2 RepliesThe adultcombobox & childcombobox have value from 1 to 10, and none.I try put it in Do Loop like the code below, but the total price not come up so well, so I think I am having problem with the Do Loop and the Payment method.One more thing, do I need to Tryparse the combobox and use the selectedIndex ?
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So i made this thread using the following
Public DoCopy_thread As New Threading.Thread(AddressOf docopy)
public Sub docopy(ByVal state As Object)
If ListBox2.Items(ListBox1.SelectedIndex) <> "" Then
[code].....
How do I set SelectedIndex of a DataGridViewComboBoxCell?The code fill the combobox with items, but I need to select one of them My Code:
[code]...
I have several list boxes on a form, the items collection is filled at design time and the selectedIndex is changed at run time. when I change the SelectedIndex the backcolor of the control changes. I don't want this to happen.
View 1 RepliesI create several controls dynamically with the function createControl which returns a control
....
ElseIf objName = "COMBO" Then
Dim cbo As New ComboBox
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I know that my combobox has 3 items (in that case that the value was 2) I found that I cannot call selectedIndex before create the combobox, but I am kind of confuse here. I tried also to add it to the panel and to the tablelayoutpanel and then set the selectedIndex but I get the same error.
It looks like this question was addressed here, but his solution did not work for me. I am creating a dynamic dropdown menu system that populates a secondary dropdownlist with the results of a query based on the selected item in the first dropdown.
First dropdown getting populated:
Dim db As New linqclassesDataContext
Dim categories = (From c In db.faq_cats)
[code].....
I am having a problem to get the results of a combobox when the user uses the tab key to exit the combobox. The combobox uses a database as the datasource. When the user uses the mouse to click on the selection the selectedindex is set proprerly, however when the user will enter some text and presses the tab key, selectedindex is set to -1.
I have attached some test code to duplicate the issue.
Imports System.Data.OleDb
Public Class Form1
Protected dvNames As DataView
Dim conDBTest As OleDbConnection
[Code]....
I'm trying to have it so that when the user selects an item from the combo box, it will display the right nodes for that selection in the treeview control. For example: User selects Artist from the combo box and the treeview displays the letter of the artist. The user selects a letter and it will display all artist with last names beginning with that letter. Unfortunately when I select a selectedindex, the treeview doesn't display anyting, it's blank. What am I doing wrong? Here's the code I'm using for artists:
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I have a form which has a combobox (cmbactiveproj) and a textbox (txtProjnameupdt). By selecting any value on the combobox the textbox changes accordingly. The user has an option to change the txtProjnameupdt.text and save.
Note: the text stored in txtProjnameupdt is part of the value in the combobox.Then I refresh the combobox by calling the datasource;
Me.QryactiveprojectsTableAdapter.Fill(Me.Projstatus.qryactiveprojects)
This reflects and changes that have been made i.e., the combobox gets refreshed.and the change made can be seen on the combobox, and selected by the code below.
cmbactiveproj.SelectedIndex = cmbactiveproj.FindStringExact(txtprojnameupdt.Text)
But when the user inserts an 'apostrophe' in the txtprojnameupdt.Text and save. It all works fine... But the selectedindex on the cmbactiveproj is BLANK.It ONLY happens when an apostrophe is used if I dont use an apostrophe it works fine..
I'm having a problem setting the SelectedIndex property of two comboboxes.
There names are,
LateralStartComboBox
LateralEndComboBox
When I run the code listed below, both of the comboboxes display list item number 6. No matter how I try to set the selectedindex their text matches. [Code]
I have in my database a smallint field with 2 values 0/1,is it possible to bind that field to a combobox with 2 values "Yes" "No" without creating another datatable for Yes/No values or to modify sql query to bring Yes/No instead 0/1 something like binding to SelectedIndex ?
View 9 RepliesIs it at all possible to reset the existing set selected index properties for a combo box?or example if the user selects the first selected index option an action occurs, the combo box then loads in another set of options and the selected index properties are then resetIf the user then selects the first option in the combo box again, it will perform a different action to the previous one.
View 2 Replies