Is Dropdown Postback Not Working in Sitecore?

Wondering why your page is not getting postback when you select any dropdown item even-though you have set AutoPostback property to true?

If so, then it can be fixed by adding below configuration in your web.config file under    <typesThatShouldNotBeExpanded> section.

      
    
        System.Web.UI.WebControls.Repeater
        System.Web.UI.WebControls.DataList
        System.Web.UI.WebControls.GridView
        System.Web.UI.WebControls.ListView
        System.Web.UI.WebControls.FormView
        Microsoft.Reporting.WebForms.ReportViewer
        Telerik.Web.UI.RadGrid
        System.Web.UI.WebControls.LoginView
        System.Web.UI.WebControls.DropDownList