What is SessionState?
The session state is used to maintain the session of each user throughout the application. Session allows information to be stored in one page and access in another page and support any type of object. In many websites we will see the functionality like once if we login into website they will show username in all the pages for that they will store username in session and they will access that session username in all the pages.
Whenever user enters into website new session id will generate for that user. This session Id will delete when he leave from that application. If he enters again he will get new session Id.
We can check this one with simple example for that create one new website and open Default.aspx page and write the following code
Default.aspx
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Asp.net Session State Example in C#, VB.NET</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>SessionStateData.aspx</h3>
<table>
<tr>
<td>FirstName:</td><td><asp:TextBox ID="txtfName" runat="server"/></td>
</tr>
<tr>
<td>LastName:</td><td><asp:TextBox ID="txtlName" runat="server"/></td>
</tr>
<tr><td></td><td> <asp:Button ID="btnSubmit" runat="server" Text="Set SessionState Data"OnClick="btnSubmit_Click" /></td></tr>
</table>
</div>
</form>
</body>
</html>
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Now add following namespaces in your codebehind
C# Code
using System;
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After that write the following code in button click
protected void Page_Load(object sender, EventArgs e)
{
}
// Set Session values during button click
protected void btnSubmit_Click(object sender, EventArgs e)
{
Session["FirstName"] = txtfName.Text;
Session["LastName"] = txtlName.Text;
Response.Redirect("Default2.aspx");
}
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