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How to use Substitution Control in ASP.NET

The substitution control is used to specify a section on an output-cached Web page where you want to substitute the dynamic content for the control. This control provides a simplified solution to partial page caching for pages where the majority of the content is cached. You can output  cache the entire page, and then use the Substitution control to specify the sections of the page that are exempted from caching.

Public Properties of the Substitution class

MethodName : Callback method to call up when the Substitution control executes.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="substitution.aspx.cs" Inherits="substitution" %>
<%@ OutputCache Duration="300" VaryByParam="none" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="">
<head runat="server">
<script runat="server">  
    static string dotprogramming(HttpContext context) {

        string name = DateTime.Now.ToString();
        return name;
    <form id="form1" runat="server">
    Page Cached DateTime<br />
&nbsp; <%= DateTime.Now.ToString() %> 
        <br />
        Current Time without cache<br />
&nbsp;<asp:Label ID="Label2" runat="server" Text=""></asp:Label>
        <asp:Substitution ID="Substitution1" runat="server" 
            MethodName="dotprogramming" />

In this example page cached for 300 seconds using OutputCache directive , But you can refresh content using Substitution control.
Code Generate the following Output
How to use Substitution Control in ASP.NET

How to use Substitution Control in ASP.NET


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Memory representation of Linked List

             In memory the linked list is stored in scattered cells (locations).The memory for each node is allocated dynamically means as and when required. So the Linked List can increase as per the user wish and the size is not fixed, it can vary.

               Suppose first node of linked list is allocated with an address 1008. Its graphical representation looks like the figure shown below:

      Suppose next node is allocated at an address 506, so the list becomes,

  Suppose next node is allocated with an address with an address 10,s the list become,

The other way to represent the linked list is as shown below:

 In the above representation the data stored in the linked list is “INDIA”, the information part of each node contains one character. The external pointer root points to first node’s address 1005. The link part of the node containing information I contains 1007, the address of next node. The last node …