Skip to main content

Maintaining Browser History for Ajax events through script manager in asp.net

In one of our project we have requirement of maintaining history of Ajax events. After doing some search on the web I have found one interesting capabilities of Script Manager control. I have found that there is one property called “EnableHistory” which will enable history for all the Ajax Event for which you have created the History Point. So Let’s first take a simple example with Ajax Tab and we are maintaining history of tab Navigation. To add the Ajax tab we first need the AjaxToolKit. So I have download the AjaxToolKit and Added Reference to my project like below.

Reference

Once I have done with adding reference I have written some asp.net HTML code to create Three tab and Also added a script manager like following which Enable history =”true” property and Navigate event. Like following.

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
 CodeBehind="Default.aspx.cs" Inherits="WebApplication2._Default" %>
 <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
 <asp:ScriptManager id="scriptManager" runat="server" EnableHistory="true" OnNavigate="scriptManager_Navigate">
 </asp:ScriptManager>
 <asp:UpdatePanel ID="updatePanelTab" runat="server" ChildrenAsTriggers="true">
     <ContentTemplate>
         <asp:TabContainer ID="ajxTab" runat="server" ActiveTabIndex="0"  AutoPostBack="true" OnActiveTabChanged="ajxTab_ActiveTabChanged">
 <asp:TabPanel ID="homTab" runat="server" HeaderText="home" >
                     <ContentTemplate>
                         Home
                     </ContentTemplate>
 </asp:TabPanel>
  <asp:TabPanel ID="aboutUsTab" runat="server" HeaderText="About us" >
                     <ContentTemplate>
                         About Us
                     </ContentTemplate>
 </asp:TabPanel>
  <asp:TabPanel ID="contactUsTab" runat="server" HeaderText="Contact us" >
                     <ContentTemplate>
                         Contact us
                     </ContentTemplate>
 </asp:TabPanel>
 </asp:TabContainer>
     </ContentTemplate>
 </asp:UpdatePanel>

</asp:Content>

Here in the above Code I have created Three tabs Home,About us and Contact us and I have putted that in update panel and Also I have enabled “Autopostback” to true so whenever tab will be changed it will post back the page. So now let us do the server side part. Here I have written code in two events. First one is from the script manager navigate event which will fire when we navigate pages thorough browser history and another one is the ActiveTabChanged event which will fire when we change Tab. In Script manager navigate I have written code to select tab based on the state from navigate event. In ActiveTabchanged event I have written code to create navigation history point which will register that in browser history. Following is the code for that.

using System;
using System.Web.UI;

namespace WebApplication2
{
 public partial class _Default : System.Web.UI.Page
 {
     protected void scriptManager_Navigate(object sender, HistoryEventArgs e)
     {
         string state = e.State["historyPoint"];
         ajxTab.ActiveTabIndex = Convert.ToInt32(state);
     }

     protected void ajxTab_ActiveTabChanged(object sender, EventArgs e)
     {
        if(scriptManager.IsInAsyncPostBack && !scriptManager.IsNavigating)
        {
            scriptManager.AddHistoryPoint("historyPoint",ajxTab.ActiveTabIndex.ToString(),ajxTab.ActiveTab.HeaderText);
        }
     }
 }
}
So code is completed now lets run the application and Check it in browser. It will be loaded like below.
WithoutHistory

Now once you browse page with some tab you can see history is enabled in browser and you can go back and forward with browser navigations like following.

AfterHistory

So that’s it. Isn’t that cool? Stay tuned for more.. Hope you liked it. Till that Happy programming.

Shout it
kick it on DotNetKicks.com

Comments

  1. This is a nice article..
    Its very easy to understand ..
    And this article is using to learn something about it..
    asp.net, c#, javascript
    Thanks a lot..!

    ReplyDelete
  2. Hello friend... you're doing a very good work... very nice blog... I've created a small website in which I've used ajax... I implemented in notepad.. Whenever I refresh my page, it moves to the homepage instead of displaying the page I'm expecting to... The state is not maintained... If you've the solution... please update... Thanks!

    ReplyDelete

Post a Comment

Your feedback is very important to me. Please provide your feedback via putting comments.

Popular posts from this blog

How to create Rest API(Web API) with ASP.NET Core 1.0

Recently Microsoft has released ASP.NET Core 1.0 RC2, I am getting lots of request from readers that about creating Web API. So I thought it will be a good idea to write a blog post about how to create Rest API(Web API) with ASP.NET Core 1.0.

So let’s get started via creating an ASP.NET Core 1.0 Web Application like following.



Once you click on ASP.NET Web Application, It will ask whether you need to create Web Application or Web API application. We are going to Web API so I am going to select Web API Application like following. Please note that in ASP.NET Core 1.0 there is no separate libraries or DLLs required for creating web APIs. This is just a project template.



Now once you click on OK It will create a Web API application with default values controller and program.cs.  As you know Program.cs is now starting point for the ASP.NET Core 1.0 application so It contains all the required configuration and startup items. Following is a code for that.
using System.IO; using Microsoft.Asp…

How to use migration with Entity Framework Core

Entity framework core is  the lightweight, extensible and cross-platform version of Entity Framework. Before some time, Microsoft has Released a new version of Entity Framework RC2. I have written a couple of blog post about Entity framework code first migration earlier for Entity framework 6.0. So there was a couple of request coming for writing a blog post about Entity Framework Core RC2 migration. So I thought it will be a good idea to give an overview how database migration works in Entity Framework Core RC2. This post will cover a basic scenario where we are going to create the database with existing ASP.NET Identity migration and then we are going to create a new model and have that migration applied in the database.

How to use Entity Framework Migrations: Let’s get started, To demonstrate entity framework core migrations, I am going to create a sample asp.net core web application like following.



Once we select asp.net core application it will appear the following dialog.



Now w…

Creating PDF with ASP.Net MVC and RazorPDF

Update: I have written a new blog post about better approach to create a PDF with asp.net mvc- You can find that following location.- A Better Solution to create PDF with Rotativa and ASP.NET MVC
In this post we are going to learn how we can easily create PDF from ASP.Net application with the help of Razor PDF NuGet package.

About Razor PDF:
This NuGet package is created by Al Nyveldt It internally uses ITextSharp an open source PDF convertor library. RazorPDF uses Razor View engine to create iTextXML which is in tern used to produce PDF file. You can get more information about that at below link.

https://www.nuget.org/packages/RazorPDF

Example(Creating PDF with ASP.Net MVC):
So what we are we waiting for ? Let’s create a simple example. To create example first thing we need to a create and ASP.Net MVC application.