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Hi there...
I need to produce a facility to add items into a blank listbox from a full list box, and then produce reports based on the ones i have added into the blank one.
it will be a web application using aspx and aspx.vb files
i have creatde a blank web form and have added two list boxes and a button to it, where do i goes from here...?
please help, or show me a link to the code i need,
thanks
tom
Just make sure you have .EnableViewState set to true for both of your listboxes, then all you have to do is something like this in a button for transferring one item to the other listbox
VB Code:
Enabling the ViewState, will make it so the new listbox retains its list on each postback
have tried that... am getting this error?
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
my code:
PHP Code:Public Class TestLists
Inherits System.Web.UI.Page
Protected WithEvents ListBoxMain As System.Web.UI.WebControls.ListBox
Protected WithEvents Button As System.Web.UI.WebControls.Button
Protected WithEvents ListBoxNew As System.Web.UI.WebControls.ListBox
Protected WithEvents TagList As ReportClient.TagList
Dim Comp As Component1 = New Component1()
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.TagList = New ReportClient.TagList()
CType(Me.TagList, System.ComponentModel.ISupportInitialize).BeginInit()
'
'TagList
'
Me.TagList.DataSetName = "TagList"
Me.TagList.Locale = New System.Globalization.CultureInfo("en-GB")
Me.TagList.Namespace = "http://www.tempuri.org/TagList.xsd"
CType(Me.TagList, System.ComponentModel.ISupportInitialize).EndInit()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ListBoxMain.EnableViewState = True
ListBoxNew.EnableViewState = True
Comp.TagList.Fill(TagList)
ListBoxMain.DataBind()
End Sub
Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button.Click
ListBoxNew.Items.Add(ListBoxMain.Items(ListBoxMain.SelectedIndex))
End Sub
End Class
make sure your Page_Load code is inside a "If Not IsPostBack Then" statement to make sure it only executes the first time
ok, that works now, how do i insert an item into listboxnew when the user double clicks an item in listboxmain??
i also want to produce a report that shows all item from that listbox, do i have to write the data into a dataset and get the data that way?
double clicking is something that happens client side and has nothing to do with asp.net...you'd have to write up some javascript to do that.
any examples you know of?also what about the reporting?
I do my best to stay away from client-scripting ;)
As for the "reporting", just loop through the items collection in the new listbox and you'll have access to all the items to do with whatever you want
ok, that sounds good, i am new to this, how shall i go about this example code please... ;)
thanks
you can use a for or a for each statement
VB Code:
something like that should work
i will need to retreive data from another sql table getting all the data related to each item of the list, will i have to perform "select" statements for each item, if so how?
i want to get all the values that are in the listbox and perform this action on each...
is this possible??PHP Code:rpTestReport.RecordSelectionFormula = "{tblTable.itmItem} = " & "'" & ListBoxItemN & "'"
bump