ASP.NET - sessions**URGENT*
Asked By sachin s
11-Feb-12 12:55 PM
hello,
Object reference not set to an instance of an object.
could any1 pls tell me what the above err means.
kind regards
Sachin
kalpana aparnathi replied to sachin s
public class Class1
{
public string mymethod()
{
HttpContext.Current.Session["MySession"] = "xyz";
return HttpContext.Current.Session["MySession"].ToString();
}
}
now in code behind create an instance of class1 call the method and see the output as xyz.
try this code on page_load event
Class1 cx = new Class1();
Response.Write(cx.mymethod());
i think you should debug your application.or show me you class file code and
place where you are trying to use this session.
hope that helps.
dipa ahuja replied to sachin s
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();
}
sachin s replied to kalpana aparnathi
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
kalpana aparnathi replied to sachin s
try this way in 3rd page:
TextBox1.Text = Session["source"].ToString();
Somesh Yadav replied to sachin s
Hi,
Session("Cart") is null
So either check if Session("Cart") is null, and create a new one if it
doesnt exists. or create a new Session("Cart") when the session is
started.
Session("Cart") = New Cart
even you can also try for this
Session("Cart") is not initialized yet. So make sure You need to check Session("Cart") with null(nothing) and assign it properly. You need to do something like this.
Dim cart As New Cart
cart = Session("Cart")
if (cart == Nothing)
cart = new cart();
then use cart object. you won't get this type of error.
Suchit shah replied to sachin s
This error means is that : "The code is trying to access a member of a reference type variable that is set to null."
So you are assigning some value which is NULL so check the condition
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