使用Telerik Ajax进行模式弹出的ASP.Net服务器控件，需要禁用浏览器窗口滚动

Question

I have a ASP.Net server control for modal popup and the page is using Telerik Ajax. When the window is popped up, if you use the mouse wheel the browser window keeps on scrolling and I want to disable that.

I tried to execute the javascript to just show an alert from the server control like below and nothing happens(really I wanted to use the commented line just after to disable browser window scrolling). The server control code is executed on postback(not on initial page load). Not sure what else need to be done

protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);
            //register javascript here if needed
            AddScript();

        }

        private void AddScript()
        {
            ClientScriptManager csm = this.Page.ClientScript;
            string scriptblock = "<script type=\"text/javascript\">alert('hi');</script>";
            //string scriptblock = "<script type=\"text/javascript\">$(\"body\").css(\"overflow\", \"hidden\");</script>";

            string scriptname = "DisableBrowserScrollBar()";

            Type csType = this.GetType();
            if (!csm.IsClientScriptBlockRegistered(csType, scriptname))
            {
                csm.RegisterClientScriptBlock(csType, scriptname, scriptblock, false);
            }
        }

Answer 1

Is there a ScriptManager on your page? If so, you need to do this:

ScriptManager.RegisterStartupScript(Page, csType, scriptName, scriptblock, true);