IsPostBack event in .NET page

renuka thumu

What is IsPostBack event in .Net page?

3 Replies

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vinay gn14y ago
In simple words, IsPostBack means is the page posted back by the server or not.. if IsPostBack is false then it means u r accessing the page from the server for the first time If IsPostBack is true then its the second or nth time the same page is getting served by the server.
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Amit Patel14y ago
IsPostBack is not an event. it is a Property.

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.

private void Page_Load()
{
  if (!IsPostBack)
        {
          // Validate initially to force asterisks
          // to appear before the first roundtrip.
                Validate();
        }
}

Please see the below link.
http://dotnet.tekyt.info/?p=30
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Satyapriya Nayak14y ago
Hi Renuka,

ispostback property

Gets a value that indicates whether the page is being rendered for the first time or is being loaded in response to a postback.

Please refer the below links

http://www.codeproject.com/KB/aspnet/IsPostBack.aspx

http://msdn.microsoft.com/en-us/library/system.web.ui.page.ispostback.aspx

Thanks
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