Method not found: System.String System.Web.UI.WebControls.ListControl.get_SelectedVal

[martin_3675]

I'm getting the following error when I post an aspx page and attempt to retrieve the values of web server listbox controls: "Method not found: System.String System.Web.UI.WebControls.ListControl.get_SelectedValue"

 

Seems I can't grab the values of listbox web server controls (see http://www.benefitsonline.ca/Travel/British_Columbia/Secure/BCTravel_Daily_App.aspx).

 

Strange thing is, at another web host (and domain) the page works fine (http://www.iabc-health-insurance.ca/Travel/British_Columbia/Secure/BCTravel_Daily_App.aspx).

 

Any ideas? Possibly the .NET Framework is corrupt?

[Derek Stone]

The SelectedValue property was introduced in version 1.1 of the .NET Framework. Your servers are using two different versions.