What is ispostback method in ASP.Net

Question

Hi... Ques : What is ispostback method in ASP.Net? Why do we use that ? How can we use pointers in ASP.Net ?

Senthilkumar · Answer

Hi IsPostBack is a property and its not a method. which returns boolean value. It checks whether the page is postedback or not. IsPostBack is a Boolean property of a page when is set (=true) when a page is first loaded. Thus the first time that the page loads the IsPostBack flag is false and for subsequent PostBacks it is true. An important point to be noted here is that each time a PostBack occurs the entire page including the Page_Load is 'posted back' and executed. Thus a very common programming practice is that whenever some part of the code is to be executed just the first time a page loads it is checked against the IsPostBack flag.

Munesh Sharma · Answer

IsPostBack property tells that the page is rendered first time or it is posted back by some server control. If it returns true it means it is posted back by some control like button click.

HEMANTH THALLURU · Answer

IsPostBack is a property and its not a method. which returns boolean value. It checks whether the page is postedback or not. IsPostBack is a Boolean property of a page when is set (=true) when a page is first loaded. Thus the first time that the page loads the IsPostBack flag is false and for subsequent PostBacks it is true. An important point to be noted here is that each time a PostBack occurs the entire page including the Page_Load is 'posted back' and executed. Thus a very common programming practice is that whenever some part of the code is to be executed just the first time a page loads it is checked against the IsPostBack flag.

Jignesh Trivedi · Answer

Hi IsPostBack is read only property. it return true if the page is being loaded in response to a client postback; else set to false. for example if i have page and it has button control. when page is first lime load this property is set to false. when use click on button then client post bask is occur so it set to true. hope this help.