Detect Browser Refresh to avoid events fired again in ASP.NET

If you have created an aspx page using C# and ASP.NET and have put a button on it. And in the Click event of this button if you are inserting some data in database , after click if user refresh the page than click event gets fired again resulting data insertion to database again, to stop events on the page getting fired on browser refresh we need to write bit of code to avoid it.

In this example I’ve put a Label and a Button on the page, on click the label Text becomes Hello and when I refresh the page label's text again becomes Hello

Generating Random Number and String in C# or Generating the Password Automatically By using asp.net with c#

Hi friends here I have written the code to generate the auto generated password 

open the visual studio 

select the new website

After that copy and paste the following code in aspx page

C# - Difference between Abstract class and Interface in Asp.Net

In previous article I explained complete OOPS Concept. Now I will explain differences between Abstract classes and Interfaces.

An Abstract class without any implementation just looks like an Interface; however there are lot of differences than similarities between an Abstract class and an Interface. Let's explain both concepts and compare their similarities and differences.

What is an Abstract Class?

An abstract class is a special kind of class that cannot be instantiated. So the question is why we need a class that cannot be instantiated? An abstract class is only to be sub-classed (inherited from). In other words, it only allows other classes to inherit from it but cannot be instantiated. The advantage is that it enforces certain hierarchies for all the subclasses. In simple words, it is a kind of contract that forces all the subclasses to carry on the same hierarchies or standards.

Maintaining State of CheckBoxes While Paging in a GridView Control

Introduction:

In this article I will explain how to maintain state of selected checkboxes during paging in gridview using asp.net

Description:

I have one gridview with checkboxes and it contains lot of data for that reason I applied paging for gridview and displaying 8 records per page. After apply the paging in gridview if I select checkboxes in first page and moving to another page and select some checkboxes in second page after that if I come back I am unable to see the previous selected values. At that time I know one new thing that is gridview won’t maintain the state of controls during postback for that reason we need write some code to maintain the previous selected values in gridview. Before seeing the code implemention first Design your aspx page like this

how to Create RSS feed Using Asp.net | RSS Feed Sample using asp.net

Introduction:

Here I will explain how to create RSS feed using asp.net.

Description:

RSS stands for "Really Simple Syndication". RSS solves a problem for people who regularly use the web. It allows you to easily stay informed by retrieving the latest content from the sites you are interested in. You save time by not needing to visit each site individually.

how to import Contacts from GMAIL using ASP.NET and C#

Introduction:

In this article I will explain how to import gmail contacts of a user by using GContacts Data API provided by Google.

Description:

We have developed one social network site at that time we think that how to popularize the our social network site I have checked some of social network sites at that time we got idea to implement import contacts concept is best to intimate all of our friends at a time I have searched so many websites to implement this concepts but no result finally I have implemented import contacts from gmail