Error in loading the page without session pagetype

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if (Session["Pagetype"].ToString() == "EXIST" || !String.IsNullOrEmpty(qID) || Session["Pagetype"].ToString() == "Preview")

"Object reference not set to an instance of an object" error for both session type.

if (Session["Pagetype"].ToString() == "EXIST" || Session["Pagetype"].ToString() == "Preview")

FYI - the page is not loading from the session page type. so the session state is false.

Posted 10-Dec-13 4:11am

sathish kumar

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bowlturner · Accepted Answer · 2013-12-10T04:24:00

C#

object pageType = Session["Pagetype"];
if ((!string.IsNullOrEmpty(pageType.ToString()) && 
    (pageType.ToString() == "EXIST" || pageType.ToString() == "Preview")))
     || !String.IsNullOrEmpty(qID)

what is likely happening is that the Session["Pagetype"] is coming back null and as such you cannot take the .ToString() of a null object. you have to test it first for null

another way to write it is

XML

object pageType = Session["Pagetype"];
if (!string.IsNullOrEmpty(pageType.ToString()))
{ 
    if (pageType.ToString() == "EXIST" || pageType.ToString() == "Preview"
     || !String.IsNullOrEmpty(qID)
    {
    }
}