c# - How to check that Request.QueryString has a specific value or not in ASP.NET?

Question

I have an error.aspx page. If a user comes to that page then it will fetch the error path in page_load() method URL using Request.QueryString["aspxerrorpath"] and it works fine.

But if a user directly accesses that page the it will generate an exception because aspxerrorpath is not there.

How can I check that aspxerrorpath is there or not?

Answer 1

You can just check for null:

if(Request.QueryString["aspxerrorpath"]!=null)
{
   //your code that depends on aspxerrorpath here
}