Question

Hey all i am trying to figure out what i am doing incorrectly here. FYI i am new to ASP.net and its ways :o):

<asp:ListBox ID="df_dd_ccyear" name="df_dd_ccyear" style="z-index: 1000;" runat="server" ClientIDMode="Static">
      <script type="text/javascript">
         var d = new Date();
         var curr_year = d.getFullYear();
         var i = 1;

         while (i < 20) {
             if (i == 1) {
                 document.write('<asp:ListItem Text=\"' + (curr_year + i) + '\" value=\"' + (curr_year + i) + '\" Selected=\"True\"></asp:ListItem>');
             } else {
                 document.write('<asp:ListItem Text=\"' + (curr_year + i) + '\" value=\"' + (curr_year + i) + '\"></asp:ListItem>');
             }
             i++;
         }
      </script>
</asp:ListBox>

When running the page i receive this error:

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. 

Parser Error Message: System.Web.UI.WebControls.ListItemCollection must have items of type 'System.Web.UI.WebControls.ListItem'. 'script' is of type 'System.Web.UI.HtmlControls.HtmlGenericControl'.

Source Error: 


Line 200:                    <div id="df-ccyear" style="z-index: 1000;">
Line 201:                        <asp:ListBox ID="df_dd_ccyear" name="df_dd_ccyear" style="z-index: 1000;" runat="server" ClientIDMode="Static">
**Line 202:                            <script type="text/javascript">**
Line 203:                                var d = new Date();
Line 204:                                var curr_year = d.getFullYear();

Source File: /chattclub/default.aspx    Line: 202 

Answer 1

I suggest using Code behind always you can (as in this case). This way you can do the same like this:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim currentYear As Integer = Date.Now.Year
    For i As Integer = 0 To 19
        Dim newItem As New ListItem
        newItem.Text = currentYear + i
        newItem.Value = currentYear + i
        newItem.Selected = False
        If i = 0 Then
            newItem.Selected = True
        End If
        df_dd_ccyear.Items.Add(newItem)
    Next
End Sub

In the markup file (the .ASPX file), you just have to declare the ListBox like:

<asp:ListBox ID="df_dd_ccyear" style="z-index: 1000;" runat="server" />