accessing session variable in another page

Question

0.00/5 (No votes)

See more:

hello guys..im newbie in ASP.NET. Using Session, i want to access variable of one page into another how do I do that. Here is what I am trying which is not working

public class Student{
   string name;
   string Class;

   public Student(string n, string c){
       name = n;
       class = c;
   }
}

Now in the Page_Load() event of Default.aspx.cs im creating two objects of Student and adding them to the Session (and to the ListBox like this)

Student student1 = new Student("Muzammil","MS");
Student student2 = new Student("Ali","MBA");

//adding these objects to Session
Session["std1"] = student1;
Session["std2"] = student2;

//adding these objects' name to list box
list1.Items.Add(student1.name);
list1.Items.Add(student2.name);

Now in the button's event in Default.aspx.cs im accessing these as follows

int index = list1.SelectedIndex;
Student std = (Student)Session[index];

lblRecords.Text = "Name:  " + std.name;
lblRecords.Text = "Class:  " + std.Class;

Now there is another page "Page1.aspx" with a label on it. How do I access these variable on that label? thnx

Posted 6-Oct-10 5:50am

AmbiguousName

Add a Solution

4 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

shakil0304003 · Answer 1 · 2010-10-06T08:15:00

Solution 2

If any one visit Page1.aspx page 1st then you can not get the value in session. So, you should check 1st that values are available in the session.

if (Session["std1"] != null && Session["std2"] != null)
{
Student std1 = Session["std1"] as Student;
Student std2 = Session["std2"] as Student;
}

Posted 6-Oct-10 8:15am

shakil0304003

Comments

AmbiguousName 6-Oct-10 14:34pm

As you can see that I am using index as key (returned by list1.SelectedIndex), now this is not accessible on the other page. It is only accessible only in the current page, so how can I get this key for other page

Brij · Answer 2 · 2010-10-06T07:27:00

Solution 1

Data is stored in session in Key, Value format. As you are doing already.

To acces any particular data, you must know the key.

So on any page, you can access the data as

Student student1 = (Student)Session["std1"];
Student student2 = (Student)Session["std2"];

Posted 6-Oct-10 7:27am

Brij

Comments

AmbiguousName 6-Oct-10 14:33pm

As you can see that I am using index as key (returned by list1.SelectedIndex), now this is not accessible on the other page. It is only accessible only in the current page, so how can I get this key for other page.

Brij 6-Oct-10 14:40pm

I dont know your actual requirement. You need th eindex on another page. So , you can pass the index by querystring to another page and using this key, you can fetch the value from session.

AmbiguousName 6-Oct-10 14:45pm

thnx...since im new so it could be little confusing for me. So the conclusion is, as suggested by you, that I need to pass the index on other page by querystring.

MdAmjadIqbal · Answer 3 · 2010-10-06T08:58:00

Solution 3

I would suggest you to get the selected Index of list by
List<> stu_list = (List) previousPage.findControl("");
then take its selected index and get the session value.

Posted 6-Oct-10 8:58am

MdAmjadIqbal

Pavel Yermalovich · Answer 4 · 2010-10-06T10:06:00

Or you can use the list of students as one object in session:

C#

private const string  STUDENTS_KEY="StudentsKey"+new Guid().ToString();

public List<Student> Students
{
     get
     {
          if (Session[STUDENTS_KEY] == null)
              Session[STUDENTS_KEY] = new List<Student>();
          return Session[STUDENTS_KEY] as List<Student>;
     }
     set
     {
          Session[STUDENTS_KEY] = value;
     }
}