Suppose i have 2 pages 'A' and 'B'. i set a session variable in 'A', that is checked in page_load function in page 'B' using:
if (!string.IsNullOrEmpty(Session["x"].ToString()))
{
}
and the appropriate actions are performed based on the value of that session variable but if I open page 'B' first , it gives the error:
Object reference not set to an instance of an object.
How do i set the instance of this object beforehand itself?
You are getting exception before the IsNullOrEmpty comes in to action and parameter passed to IsNullOrEmpty is evaluated. You will get the exception By calling ToString() on Session["x"] if Session["x"] is null. So you will get exception before the call to IsNullOrEmpty is made.
Change
if (!string.IsNullOrEmpty(Session["x"].ToString())) {}
To
if(Session["x"] != null && Session["x"].ToString() != string.Empty) {}
You are using Session["x"].ToString() when SessionX is null that's why you are getting null exception
So you should check that Session["x"] should not be null
if(Session["x"] != null )
{
// your code
}
