Question

if(Page.Request.QueryString["ParamName"] != null)
  if(Page.Request.QueryString["ParamName"] == expectedResult)
    //Do something spectacular

The above seems cludgey. Is there a more elegant/compact way of checking if a query string parameter is not null and if so – retrieving the value of it?

Answer 1

I thought first of offering

if ((Page.Request.QueryString["ParamName"] ?? "") == expectedResult) {

but quickly realized that with strings, comparing some string with null is fine, and will produce false, so really just using this will work:

if(Page.Request.QueryString["ParamName"] == expectedResult)
    //Do something spectacular