Session
Here, we will see how to Storing and Retrieving
values from Session. A session is defined as the period of time that a unique
user interacts with a Web application. HTTP is a stateless protocol, it can't
hold the client information on page. If user inserts some information, and move
to the next page, that data will be lost and user would not able to retrieve the
information. So what we need? we need to store information. Session provides
that facility to store information on server memory.
Now creating a web application with two form.
one for storing value of session and other for retrieving session value.
storing a value to session
Now drag and drop a TextBox and a button
control on the form.
.ASPX code
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<br />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
Now double click on the Button control and add
the following code.
.cs code
Public Class sessionstore
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal
sender As Object,
ByVal e As
System.EventArgs)
Handles Me.Load
Session("UserName")
= TextBox1.Text
End Sub
Protected Sub Button1_Click(ByVal
sender As Object,
ByVal e As EventArgs) Handles
Button1.Click
Response.Redirect("sessionretrive.aspx")
End Sub
End Class
Retrieve session value
Now Taking another form to retrieve session
value. Drag a label control on the form and add the following code on the page
load event.
Public Class sessionretrive
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal
sender As Object,
ByVal e As
System.EventArgs)
Handles Me.Load
If Session("UserName")
IsNot Nothing Then
Label1.Text =
"Welcome : " + Session("UserName")
Else
End If
End Sub
End Class
Now run the application and test it.
Figure1
Now enter the name in the TextBox.
Figure2
Now click on the Button. TextBox value will be
display on the label control.
Figure3