在回发期间访问转发器内的动态创建的控件

I have an ASP.NET page with a ReportViewer control that displays an SSRS report specified by a GET parameter. I am hiding the ParameterHeader of the ReportViewer and displaying the parameters myself on the ASP.net page using controls like ListBox and CalendarExtender (I am doing this because not everyone is allowed to see everything and I want to have control over the report parameter that selects which parts are displayed).I have an ASP.NET page with a ReportViewer cont