Question

In normal asp.net the following works:

   private float getInternetExplorerVersion()
{
  // Returns the version of Internet Explorer or a -1
  // (indicating the use of another browser).
  float rv = -1;
  System.Web.HttpBrowserCapabilities browser = Request.Browser;
  if (browser.Browser == "IE")
    rv = (float)(browser.MajorVersion + browser.MinorVersion);
  return rv;
}

but in asp.net mvc2 gives error at “System.Web.HttpBrowserCapabilities browser = Request.Browser;”:

Cannot implicitly convert type ‘System.Web.HttpBrowserCapabilitiesBase’ to ‘System.Web.HttpBrowserCapabilities’

Thanks
Arnab

Answer 1

That’s because the Browser property is of type HttpBrowserCapabilitiesBase instead of HttpBrowserCapabilities. So either use implicit var or specify the proper type:

float rv = -1;
var browser = Request.Browser;
if (browser.Browser == "IE")
    rv = (float)(browser.MajorVersion + browser.MinorVersion);

or if you prefer typing lots of code:

float rv = -1;
System.Web.HttpBrowserCapabilitiesBase browser = Request.Browser;
if (browser.Browser == "IE")
    rv = (float)(browser.MajorVersion + browser.MinorVersion);