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Editorial Team
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Asked: 2026-05-31T20:45:40+00:00

Platform: asp.net 4.0 I load scriptmanager from a baseclass for custom cdn handling and

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Platform: asp.net 4.0

I load scriptmanager from a baseclass for custom cdn handling and scripts inserting in pages and other custom things.

The problem is that when I insert an UpdatePanel it doesn’t find the script manager because updatepanel search for it to early.

Is there a solution that does not imply removing ScriptManager from the basePage.

this class is from our custom utility dll

public abstract class OurFrameworkBasePage:Page
{
    protected override void OnInit(EventArgs e)
    {
        CurrentScriptManager = BuildScriptManager();
        Form.Controls.AddAt(0, CurrentScriptManager);
        base.OnInit(e);
    }

    private ScriptManager BuildScriptManager()
    {
        return new ScriptManager
        {
            //some scriptmanager settings
        };
    }

    protected ScriptManager CurrentScriptManager { get; set; }
}

this is site specific basepage

public abstract class SiteBasePage:OurFrameworkBasePage
{
    //some custom methods and utility for a specific site
}

the default.aspx page

<html>
<head runat="server"><title></title></head>
<body>
    <form id="form1" runat="server">
       <div>
        <asp:UpdatePanel runat="server">
            <ContentTemplate>
                <asp:Literal runat="server" ID="ltr"></asp:Literal>
                <asp:Button runat="server" OnClick="btnOkClick" ID="btnOk" Text="ok"/>
            </ContentTemplate>
        </asp:UpdatePanel>
       </div>
    </form>
</body>
</html>
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1 Answer

  1. Editorial Team

    Hopefully you have control over your framework class, as this will fix your issue:

    protected override ControlCollection CreateControlCollection()
{
    CurrentScriptManager = BuildScriptManager();
    ControlCollection pageControls = base.CreateControlCollection();
    pageControls.AddAt(0, CurrentScriptManager);
    return pageControls;
}
protected override void OnInit(EventArgs e)
{
    Form.Controls.AddAt(0, CurrentScriptManager);
    base.OnInit(e);
}

    Needs to be in both places. First, in CreateControlCollection so that it is created along with all the other controls. Second, in OnInit, because the ScriptManager needs to reside in a form with runat=”server”

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