dynamically generating options for select box

**sbhmf** · Aug 18th, 2003, 10:47 PM

in classic asp i do this:

<select name=...>
<%for i=0 to UBound(Session("MyGroupsArray"))%>
<option><%=Session("MyGropupsArray")(i)%></option>
<%next%>
</select>

in asp.net i did:

<tr><td>
<asp:label for="selGroups">Select your default group:</asp:label>
<asp:dropdownlist id="selGroups" runat="server">
<%For i = 0 to UBound(Session("AllGroups"))%>
<asp:listitem><%=Session("AllGroups")(i)%></asp:listitem>
<%Next%>
</asp:dropdownlist></td></tr>

I AM GETTING A BLOOMIN' ERROR !@#$% why?

how do i code a dropdownlist dynamically in .NET?

**pvb** · Aug 19th, 2003, 12:56 PM

Here's one way you can do it with DataBinding. The aspx page:

Code:

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="DynoDropDown.aspx.vb" Inherits="localhost.DynoDropDown"%>
<html>
	<body>
		<form runat="server">
			<asp:DropDownList ID="myDropDown" Runat="server"/>
		</form>
	</body>
</html>

and the code behind:

VB Code:

Imports System
Imports System.Collections
Public Class DynoDropDown : Inherits System.Web.UI.Page
    Protected myDropDown As DropDownList
    Protected Overrides Sub OnInit(ByVal e As EventArgs)
        Dim list As New ArrayList(10)
        For i As Int32 = 1 To 10
            list.Add("info" + i.ToString())
        Next
        Session.Item("MyArrayList") = list
        myDropDown.DataSource = CType(Session.Item("MyArrayList"), ArrayList)
        myDropDown.DataBind()
    End Sub
End Class

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