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].....
Trying to access a property from the parent page on my user control.
Here's the start of my default.asp codebehind:
Partial Class _Default
Inherits System.Web.UI.Page
Private _selectedID As String = "74251BK3232"
[Code].....
I'm getting the error "selectedID is not a member of System.Web.UI.Page"
I have an ASP.NET page (WebForm) on which I set the content of a central DIV by dynamically loading one of five user controls during Page_Load, dependant on the stage of the application.
One of the user controls contains radio buttons and a text box together with a submit button. What I want to do is process that information when the form is posted using the submit button.
I could do this with an AJAX call using jQuery, but I don't really want to do that, so I'm trying to access the form data on postback, but on page load following the postback the data is not present in the Request.Form object.
Looking at what I need to do it seems pretty simple and I'm sure is once you've got your head around it, but I can't find out how to carry this out. Some of the things I have read refer to event bubbling, but that doesn't make too much sense in this scenario.
EDIT: To clarify, I want to post the page back to itself to capture the values from the form elements via the Request object, store them in the database, and then display a confirmation message (or something else) on postback, and not re-display the same control again. So I won't be loading the same user control again.
I have a ListBox and a button. I want the button to be enabled only if the user has selected an item from the ListBox... How do I do this?
View 9 RepliesI'm creating a composite user control and trying to exposing the controls as properties so that I can databind them from the form that I drop the user control onto. One of the controls I'm trying to expose is a combobox and I can't seem to figure out how to expose this combobox to the designer. I'm trying the following code that I've cobbled together from what bits of documentation I can find but so far no joy.
<Category("Data"), Bindable(True), _
Browsable(True), EditorBrowsable(EditorBrowsableState.Always), _
DesignerSerializationVisibility(DesignerSerializationVisibility.Visible), _
AttributeProvider(GetType(IListSource))> _
Public Property RollbackCombo As ComboBox
[Code] .....
In my application I have a listbox and SelectionMode should be MultiSimple because users need to see which items they selected. In another tab we have another listbox this one should show all the selection users had done in first tab. Private Sub
[Code]....
Using vb.net on an aspx code behind event, is there away to tell from a parent page if the child page popup is open, and then close the child page if it is truly open based on some event on the parent page, like clicking a gridview edit link, again?
View 1 RepliesYou 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]....
I am trying to change an item in a selected item of a listbox.
View 1 Repliesi have a windows from project and in that project i created a user control lets call itcustombutton1 now i can use that control quite easily either at design time or runtime by creating a new instance of it like
View 1 RepliesI have multi select set to false and get this error
InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index
vb.net
Private Sub MembersList_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MembersList.SelectedIndexChanged
Try
[Code].....
I have a form with a list box and a button. The list box is filled with text files from a folder. When you click the button whatever file is selected in the list box is then opened and each line of that file is added as an item in a list box on another form.I'm not sure what to code for if something in the first list box is not selected.
View 5 RepliesMy code follows. I have six items (indices 0-6) and I'm trying to check if one has been selected or not. If not, then messagebox yells at you to select one. If it does, it tells you what you have selected. I'm having a horrible brain fart and contemplated coming here for about 45 minutes as I couldn't get it.
If ListBox1.SelectedItem.ToString <> "" Then
MessageBox.Show("You selected " + ListBox1.SelectedItem.ToString)
Else
MessageBox.Show("Please select an item.")
End If
In .NET there doesn't seem to be a property to find the item just selected in a multi-select listbox; SelectedIndex always shows the first selected item. From memory VB6 had the ListIndex property that changed accordingly... Why remove a useful property ?
Duplicate: How to get the last selected item in multiselect ListBox?
I need to cancel the selected item in the listbox if the number of selections exceeded from max number the user has defined. What should I do?
View 6 RepliesI have the below code that works great, until you have multiples of the same thing.example of data
burger
-tomato
+tomato[code].....
if i select the +tomato in wrap it remmoves the +tomato in burger (deleting the 1st oocurance of it) how can i fix that. i have played alot and can not figure it out.(ps the other list boxes are other data but it needs to remove the same "line" as each other. they are all changed to the same selected index when 1 is changed)
Dim value As String
Dim value1 As String
Dim value2 As object[code].....
What im trying to do is display my details in a listbox then the one that is selected frm the listbox is displayed in the textboxes and when delete button is clicked it is flagged at deleted??? This is what should happen!!:@
I kow there is definitely a problem with this piece of code im setting the index and length to constant numbers so if a different name is clicked it does not work!! is there another way to set this to allow for any length or index position??
CustomerIDTextBox.Text = DisplayCustomersListBox.Text.Substring(0, 4)
SurnameTextBox.Text = DisplayCustomersListBox.Text.Substring(5, 7)
ForenameTextBox.Text = DisplayCustomersListBox.Text.Substring(12, 10)
[Code].....
have this code here:
Dim decSubTotal As Decimal
Public g_selected As Integer
'dvd titles
[Code].....
So, I need to be able to edit an item that has been selected in a listbox. I need to do so with a button click event. Theoretically, I know how to do this, because I know how to add an item, and how to remove one, and how to insert an item at a specific location.
'Dim strinput As String
'Dim Item As Object
'Dim index As Integer = lstList.Items.IndexOf(item)
'strinput = InputBox("Edit This Item")
'lstList.Items.RemoveAt(lstList.SelectedItem)
'lstList.Items.Insert(index, strinput)
however, this does not work at all. what am I doing wrong??
How to check whether the listbox contain selected item or not in vb.net.
View 8 RepliesI am trying to use a listbox to hold categories from one table in a database and by clicking on the categories in the listbox it will display data from another table in the database that is linked to those categories. One table has a field called ID and the other has categoryID and categoryID is linked to ID so it displays the numbers from ID.I am using this:
daSamples.SelectCommand.CommandText = "SELECT * FROM tblSamples WHERE tblSamples.categoryid =" & (lstCategory.SelectedIndex + 1)
daSamples.Fill(dsSamples, "tblSamples")
Currently, however with this if you delete a category from the table with ID in it then it changes the values of the selectedindex in the listbox which messes up the data that gets displayed. How can i change this so instead of using the selectedindex from the listbox, it takes the ID from the selectedindex?
Im trying to get a webpages selected item in a listbox. I was able to get what I could from the textboxes using the htmlelementcollection, but when I try to get what is inside a listbox nothing comes up.
Code:
Dim theElementSelection As HtmlElementCollection = Form1.wbCHCTrac.document.GetElementsByTagName("Option")
For Each currentElement as HtmlElement in theElementCollection
Dim controlName As String = currentElement.GetAttribute("Value").ToString
if controlName = "Selected" then
controlname = currentElement.GetAttribute("Value").ToString
[Code] .....
Iv been trying to figure this out for hours ok so basically i need a to check if there is an item selected in listbox1Heres the code in trying to make work
If ListBox1.SelectedItem = True Then
ListBox2.Items.RemoveAt(ListBox1.SelectedIndex)
ListBox3.Items.RemoveAt(ListBox1.SelectedIndex)
[code]....
I know this is simple but hard for me xD. Opening a msgbox when a listbox item is clicked. [code] It MUST contain the msgbox.
View 4 RepliesI would like it when button 3 is clicked it will remove the selected item from listbox 3.
View 7 RepliesI want to remove an item in a listbox1 by clicking on it with the mouse to highlight it and then clicking the remove button this is the code i have for button1_click
ListBox1.SelectedItem.delete(ListBox1.SelectedItem)
that doesn't do anything.
I've got a listbox that when you select an Item in the contextmenustrip for that listbox to "Rename" the item, an inputbox pops up and prompts you insert a new name, how do I change the selected Items text? [code]
View 9 RepliesIs there a way to see if an item is selected in a listbox?
View 13 RepliesI've bound a listbox to a database; how do I get the value of the selected item out as a string? Something like
temp = listbox1.SelectedValue.ToString()
Only returns
"System.Data.DataRowView"
rather than the actual value.
i would like to take the selected item in the listbox, and have the text of the item as a string. how can i do this?
View 3 Replies
