variables passes null value

Question

I have tried setting my session values, but every time I want to display the text a user has entered in the previous page it returns null

I have three pages Subscriber details, Package Selection and Bank Details, all three pages follow each other and the user has filled all pages with his/her desired info and clicks next, they are directed to a page where all the info they entered are displayed.

I cant seem too see what I'm doing wrong?

SubscriberDetails.aspx

protected void Button1_Click(object sender, EventArgs e) { string FullName = txtFullName.Text; string CompanyName = txtCompanyName.Text; string Vat = txtVAT.Text; string ContactNumber = txtContactNumber.Text; string Fax = txtFax.Text; string District = txtDistrict.Text; string Street = txtStreet.Text; string City = txtCity.Text; string Code = txtPostal.Text; string Trading = txtTrading.Text; string Id = txtID.Text; string ContactPerson = txtContactPerson.Text; string Email = txtEmail.Text; Session["FullName"] = FullName; Session["CompanyName"] = CompanyName; Session["VAT"] = Vat; Session["ContactNumber"] = ContactNumber; Session["Fax"] = Fax; Session["District"] = District; Session["City"] = City; Session["Street"] = Street; Session["Code"] = Code; Session["Trading"] = Trading; Session["ID"] = txtID.Text; Session["ContactPerson"] = ContactPerson; Session["Email"] = Email; }

Final.aspx

protected void Page_Load(object sender, EventArgs e) { if (string.IsNullOrEmpty((string)Session["Fullname"])) { lblFullName.Text = "N/A"; } else { lblFullName.Text = Session["FullName"].ToString(); } if (string.IsNullOrEmpty((string)Session["CompanyName"])) { lblCompanyName.Text = "N/A"; } else { lblCompanyName.Text = Session["CompanyName"].ToString(); } if (string.IsNullOrEmpty((string)Session["VAT"])) { lblVat.Text = "N/A"; } else { lblVat.Text = Session["VAT"].ToString(); } if (string.IsNullOrEmpty((string)Session["ContactNumber"])) { lblContactNumber.Text = "N/A"; } else { lblContactNumber.Text = Session["ContactNumber"].ToString(); } if (string.IsNullOrEmpty((string)Session["Fax"])) { lblFax.Text = "N/A"; } else { lblFax.Text = Session["Fax"].ToString(); } if (string.IsNullOrEmpty((string)Session["District"])) { lblDistrict.Text = "N/A"; } else { lblDistrict.Text = Session["District"].ToString(); } if (string.IsNullOrEmpty((string)Session["Street"])) { lblStreet.Text = "N/A"; } else { lblStreet.Text = Session["Street"].ToString(); } if (string.IsNullOrEmpty((string)Session["City"])) { lblCity.Text = "N/A"; } else { lblCity.Text = Session["City"].ToString(); } if (string.IsNullOrEmpty((string)Session["Code"])) { lblCode.Text = "N/A"; } else { lblCode.Text = Session["Code"].ToString(); } if (string.IsNullOrEmpty((string)Session["Trading"])) { lblTrading.Text = "N/A"; } else { lblTrading.Text = Session["Trading"].ToString(); } if (string.IsNullOrEmpty((string)Session["ID"])) { lblID.Text = "N/A"; } else { lblID.Text = Session["ID"].ToString(); } if (string.IsNullOrEmpty((string)Session["ContactPerson"])) { lblContactPerson.Text = "N/A"; } else { lblContactPerson.Text = Session["ContactPerson"].ToString(); } if (string.IsNullOrEmpty((string)Session["Email"])) { lblMail.Text = "N/A"; } else { lblMail.Text = Session["Email"].ToString(); } }

Is string FullName = txtFullName.Text; returning null, or is Session["Fullname"] returning null? — Codeman
– Codeman, Commented Apr 10, 2013 at 21:15
Not an answer, but perhaps look into the ternary operator. This would simplify your code and you could have something like lblContactPerson.Text = string.IsNullOrEmpty((string)Session["ContactPerson"]) ? "N/A" : Session["ContactPerson"].ToString(); so that you don't have pages of if statements. — spy890
– spy890, Commented Apr 10, 2013 at 21:20

MeTitus · Accepted Answer · 2013-04-10 21:16:31Z

Well you don't have many options there, if that is happening you have an issue with your session. Perhaps every other request is initiating a new session, check that to make sure it is not happening.

Check with:

Session.SessionID;

user153923 · Accepted Answer · 2013-04-10 21:22:36Z

I see one piece of code using TextBox controls and the lower using Label controls.

You aren't, maybe, reading the wrong ones, are you?

This as just an FYI: We get customer complaints on our websites if we fill in values like "N/A". Most people seem to prefer to see the blank spaces, which would also simplify your code:

lblVariable.Text = string.Format("{0}", Session["Variable"]);

Variable, obviously, needs to change with your Session and Control variable names.

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