troubleshooting Question

How do I fix Visual Studio 2008 error: "Generation of designer file failed: Unknown server tag 'cc1:CalendarExtender'

Avatar of AusBoyz
AusBoyz asked on
10 Comments1 Solution4972 ViewsLast Modified:
After adding a calendar extender to my webpage, the designer file fails to update for any other controls I add to the page, like a button. Because of this generation failure with the designer file, I can not continue to develop further on the site.

If I remove all instances of any extender from the .aspx file then the designer file will work fine again.
<%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/Member.Master" CodeBehind="WebForm1.aspx.vb" Inherits="NorthAmerica.WebForm1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MemberContentPlaceHolder" runat="server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    <cc1:CalendarExtender ID="TextBox1_CalendarExtender" runat="server" 
        Enabled="True" TargetControlID="TextBox1">
    <asp:Button ID="Button1" runat="server" Text="Button" />
Public Partial Class WebForm1
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    End Sub
    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
    End Sub
End Class
David Robitaille
Analyst Programmer

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