Nigel Whitworth's Development Site

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Dynamic Combo

In the old ASP method for doing lists/combo boxes was to have a <Select /> tag with a list of items ( Options ) underneath. The new method simplifies things a little. You build up an array list and then bind the array list to a server list as in the following example.


<html>
<head>
    <script language="VB" runat="server">
        Sub Page_Load(sender As Object, e As EventArgs) 
            If Not IsPostBack Then
                    ' Don't want to add items to the list.
                Dim values as ArrayList= new ArrayList()
                    ' Build up the array ( values ) using the method .ADD 
                DropDown1.DataSource = values
                DropDown1.DataBind
            End If
        End Sub
        Sub SubmitBtn_Click(sender As Object, e As EventArgs)
           Label1.Text = "You chose: " + DropDown1.SelectedItem.Text
        End Sub
    </script>
</head>
<body>
    <h3><font face="Verdana">DataBinding DropDownList</font></h3>
    <form runat=server>
        <asp:DropDownList id="DropDown1" runat="server" />
        <asp:button Text="Submit" OnClick="SubmitBtn_Click" runat=server/>
        <p><asp:Label id=Label1 font-name="Verdana" font-size="10pt" runat="server" /> </p>
    </form>
</body>
</html>

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