ASP.NET - Sessions urgent

Asked By sachin s
11-Feb-12 01:20 PM

hi,
I have used 3 pages, wherein i have used sessions for storing the values in 1st & 2nd page.
i want the values to b displayed in the 3rd page in a textbox ctrl.

1st page(drop down connected to SQL 2000): i have used the foll code Session["source"] = dt.Rows[0]["source"].ToString();
2nd page :protected void TextBox1_TextChanged(object sender, EventArgs e)
    {
    Session["name"] = TextBox1.Text;
    } 3rd page : TextBox1.Text = (Session["source"]).ToString(); For the above code, i get "

"Object reference not set to an instance of an object".

Pls advice.
Sachin

  dipa ahuja replied to sachin s
11-Feb-12 02:22 PM
The error is coming because session contains null value

always check session before using it for ex:

if(Session["use"] != null)
{
  string user=Session["user"].ToString();
}
  Danasegarane Arunachalam replied to sachin s
12-Feb-12 01:02 AM
1.Did you debug the code.
2.Does the code
Session["source"] = dt.Rows[0]["source"].ToString();

assign any value to the session ?

3.And also you are setting the session in the keypress event of text box

Session["name"] = TextBox1.Text;

Which may not stored

  D Company replied to sachin s
12-Feb-12 01:32 AM
Hello sachin.

as suggested in previous posts , first thing u have to check whether ur session is null or not than assign it.
second thing that u can do here is check your session variables value on page load, and see if u get any value. m sure u will not.

third thing define your session variable globally, and yes put breakpoints

hope it helps!!
regards
D
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