Script Manager

hozdaman · October 14th, 2011, 11:46 AM

Hi Imar,

I keep getting this Script Manager error. Can you help me out. Thanks.

[InvalidOperationException: The control with ID 'UpdatePanel1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.]
System.Web.UI.UpdatePanel.get_ScriptManager() +474740
System.Web.UI.UpdatePanel.RegisterPanel() +2515953
System.Web.UI.UpdatePanel.OnInit(EventArgs e) +19
System.Web.UI.Control.InitRecursive(Control namingContainer) +140
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +480

here is the code

Code:

<script type="text/javascript">
    function ValidatePhoneNumbers(source, args) {
        var phoneHome = document.getElementById('<%= PhoneHome.ClientID %>');
        var phoneBusiness = document.getElementById('<%= PhoneBusiness.ClientID %>');
        if (phoneHome.value != '' || phoneBusiness != '') {
            args.IsValid = true;
        }
        else {
            args.IsValid = false;
        }
    }
</script>
<asp:UpdatePanel runat="server" ID="UpdatePanel1">
    <ContentTemplate>

Imar · October 14th, 2011, 01:48 PM

Hi there,

As the error message suggest, in order to use an UpdatePanel, your page needs a ScriptManager. If you're following along with the book, the ScriptManager can be found in the Master Page. If it's not there you can drag one from the toolbox. The AJAX chapter shows how to do this.

Cheers,

Imar