Enable asp.net polling, DOT NET Programming

Assignment Help:

How to Enable ASP.NET polling?

All our database side is configured in order to get the SQL Cache working in the ASP.NET side we require to do some configuration in the web.config file.

The 2 attributes are require to set in the "web.config" file:-

  • Set the "Enabled" attribute to true to set the caching on.
  • Set the poll time attribute to the number of milliseconds between every poll

2415_asp.net polling.png

Figure :- Web.config file modifications for SQL cache

At last use the Cache dependency object in your ASP.NET code.

After that comes the final step to use our cache dependency with programmatic data caching,output caching  and data source control, .

For the programmatic data caching, we have to create a new SqlCacheDependency &  supply that to the Cache.Insert() process .  In the SqlCacheDependency constructor, you supply 2 strings. The first is the name of the database you defined in the element in the part of the web.config file e.g: Northwind. The second is the name of the linked table example: Products.

private static void CacheProductsList(List products) {SqlCacheDependency sqlDependency = new SqlCacheDependency("Northwind", "Products");

HttpContext.Current.Cache.Insert("ProductsList", products, sqlDependency, DateTime.Now.AddDays(1), Cache.NoSlidingExpiration);}

private static List GetCachedProductList()

{return HttpContext.Current.Cache["ProductsList"] as List;}

ClsProductItem is business class, and here we are trying to cache a list of ClsProductItem instead of DataSet or DataTable.

The following method is used by an ObjectDataSource Control to retrieve List of Products

 public static List GetProductsList(int catId, string sortBy)

{

//Try to Get Products List from the Cache

List products = GetCachedProductList();

if (products == null)

{

//Products List not in the cache, so query the Database layer

ClsProductsDB db = new ClsProductsDB(_connectionString);

DbDataReader reader = null;

products = new List(80);

if (catId > 0)

{

//Return Product List from the Data Layer

reader = db.GetProductsList(catId);

}

else {

//Return Product List from the Data Layer

reader = db.GetProductsList();

}

//Create List of Products -List if ClsProductItem-products = BuildProductsList(reader);

reader.Close();

//Add entry to products list in the Cache CacheProductsList(products); }

products.Sort(new ClsProductItemComparer(sortBy));

if (sortBy.Contains("DESC")) products.Reverse();

return products; }

To perform the same trick with output caching, you simply need to set the SqlDependency property with the database dependency name and the table name, separated by a colon:

<%@ OutputCache Duration="600" SqlDependency="Northwind:Products" VaryByParam="none" %>

The same technique works with the SqlDataSource and ObjectDataSource controls:

 


Related Discussions:- Enable asp.net polling

Game development tutorials required, Game development tutorials required ...

Game development tutorials required Project Description: I need video tutorials like lynda for game development using unity. You must have developed games before and need to

Reading strings from the keyboard, Reading strings from the keyboard   ...

Reading strings from the keyboard   using System; class Prog3_1 {       public static void Main()   {    Console.Write ("Enter Your First Name : "); // Displaying to writ

School management system, Project Description: I need complete school ma...

Project Description: I need complete school management software, where user will get four module for their enquiry, 1> Student management 2> Staff complete payrole system

I need professional telerik winform, I need Professional TELERIK WinForm ...

I need Professional TELERIK WinForm Project Description: Professional TELERIK Professional assistance in  TELERIK WinForm via remote control. Development WinForm in C #

I need some a vba expert urgent, I need some a VBA expert urgent Project...

I need some a VBA expert urgent Project Description: I require a VBA expert for scraping data from internet. .NET, Excel, Data Processing, Visual Basic

Develop a windows desktop application, Develop a windows desktop applicatio...

Develop a windows desktop application Project Description: I am looking to get a desktop application developed. The desktop application will have the subsequent few features:

Explain the concept of possible validation errors, Introduction to .NET Tec...

Introduction to .NET Technology 1. Explain the following with respect to .NET Technologies: a. Web Applications b. Web Server Connections 2. Write a sample program using AS

Types of compatibility in vb6, What are types of compatibility in VB6 T...

What are types of compatibility in VB6 There are three possible project compatibility settings: No Compatibility Project Compatibility Binary Compatibility

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd