how to use session variable in class files asp.net 4.0 C#

Question

i have created on web application in Asp.net 4.0 using C#. i have implemented session in asp pages but i want to access same session data in my class files. i have searched regarding this and then i used HttpContext.Current.Session[something] but it is always throwing NullException. I am calling this method from page load of aspx page. Thanks in advance....

shashi · Answer

Sample.testClass obj = new Sample.testClass(); what is Sample?

Kalai · Answer

Try this code. webpage.aspx.cs =============== protected void Page_Load(object sender EventArgs e) { Session[SessionName] = SessionVal; Sample.testClass obj = new Sample.testClass(); Response.Write(obj.getSession()); } testClass.cs =============== public string getSession() { if (HttpContext.Current.Session[SessionName] != null) { string sessionID = HttpContext.Current.Session[SessionName].ToString(); return sessionID; } else { return null; } }