What is PostBack?

The IsPostBack property can be used to determine if the page is submitted to itself. When a form is submitted back to the same page that contains it, it's called a post back. ASP.NET provides a property called IsPostBack that is TRUE when the page is being loaded as a result of a post back, and is FALSE otherwise 

When the page is loaded for the first time (initial load) it is not a post back. Now when any event is performed like some button click than it's a postback.  

 

In ASP.NET you can use IsPostBack property to check if its a postback. 

PostBack is the name given to the process of submitting an ASP.NET page to the server for processing.

 

PostBack is done if certain credentials of the page are to be checked against some sources (such as verification of username and password using the database). This is something that a client machine is not able to accomplish and thus these details have to be 'posted back' to the server. 

Hi Akash,

 

Postback is actually sending all the information from client to web server, then web server process all those contents and returns back to the client. Most of the time ASP control will cause a post back (e. g. buttonclick) but some don't unless you tell them to do In certain events ( Listbox Index Changed,RadioButton Checked etc..) in an ASP.NET page upon which a PostBack might be needed.

IsPostBack is a property of the Asp.Net page that tells whether or not the page is on its initial load or if a user has perform a button on your web page that has caused the page to post back to itself. The value of the Page.IsPostBack property will be set to true when the page is executing after a postback, and false otherwise. We can check the value of this property based on the value and we can populate the controls on the page.

Is Postback is normally used on page _load event to detect if the web page is getting generated due to postback requested by a control on the page or if the page is getting loaded for the first time.

Hi,

 

Please read this article - 

 

https://www.c-sharpcorner.com/uploadfile/2f73dd/what-is-postback-in-Asp-Net/ 

watch this video once 

 

https://www.youtube.com/watch?v=yZJQ4Z6kEzs

Hi Akash,

 

PostBack is the name given to the process of submitting an ASP.NET page to the server for processing. PostBack is done if certain credentials of the page are to be checked against some sources (such as verification of username and password using database).

 

Refer below links,

https://www.c-sharpcorner.com/uploadfile/2f73dd/what-is-postback-in-Asp-Net/

https://www.codeproject.com/Articles/811684/Understanding-The-Complete-Story-of-Postback-in-AS

https://stackoverflow.com/questions/4251157/what-is-a-postback

Hello Akash,

 

PostBack is a property of the Asp.Net page that tells whether or not the page is on its initial load and if a user has perform a button on your web page that has caused the page to post back to itself. 

 

Postback is actually sending all the information from client to web server, then web server process all those contents and returns back to the client

 

PCB link for more details.

 

http://net-informations.com/faq/asp/ispostback.htm 

 

https://www.codeproject.com/Articles/811684/Understanding-The-Complete-Story-of-Postback-in-AS

 

https://www.c-sharpcorner.com/uploadfile/2f73dd/what-is-postback-in-Asp-Net/ 

 

https://stackoverflow.com/questions/4251157/what-is-a-postback