Session Variables Problem

Hi guys,

The code in one my aspx files is as follows.

string sString;
sString= Session["sfetchline"].ToString();

void Page_Load(object sender, EventArgs e)
{

if (!Page.IsPostBack)
{
BindGrid();
}
}

When this page is called. I get the error as follows(line 24)

System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 23: string sString;
[B] Line 24: sString= Session["sfetchline"].ToString(); [B]
Line 25:
Line 26: if (!Page.IsPostBack)


I am using the same method to retrieve data from Session variables in other pages as well. But I dont get any errors.

Your session variable Session["sfetchline"].ToString is probably not initialised at this moment. Maybe you would want to test if it's not Nothing before retrieving its value. The Session object has an item collection I think, so maybe it might be good to add a new session item "sfetchline" using the method Add and then initialise it to "" by default.