IsPostBack Property

Indicates whether the page is being rendered for the first time or is being loaded in response to a postback.

private void Page_Load()
{
    if (!IsPostBack)
    {       
        YourFunctionName();
    }
}

In above example, if the page is rendering for the first time then the YourFunctionName( ) function will execute otherwise it will not execute.


Thanks and Regards
Akiii