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  • Category: ASP.NET

    Difference between AUTOPOSTBACK and ISPOSTBACK in asp.net

    Hi I am BASKARAN I want to know the Difference between AUTOPOSTBACK and ISPOSTBACK in asp.net, why we give AUTOPOSTBACK=true in clint side? and why we give ISPOSTBACK=false in server side ? pls give me brife explaination, and define inline code..? in asp.net.
  • #609139
    hi Baskaran,


    Difference between AUTOPOSTBACK and ISPOSTBACK in asp.net
    topic was discussed in our DNS forums..

    Refer the below Link :


    http://www.dotnetspider.com/forum/286585-Difference-between-AUTOPOSTBACK-ISPOSTBACK-asp-net.aspx


    Palanikumar.A
    $-Success is often the result of taking a misstep in the right direction-$

  • #609142
    Autopostback - page is posted back to the server automactically based on some events in the control.

    ispostback- checks whether the page is being loaded in response to a client postback, or if it is being loaded and accessed for the first time.

    ispostback=true -page is being loaded in response to a client postback.
    ispostback=false -the page is loaded for the first time

  • #609143
    HI

    •postback:
    the page performs a POST request to itself

    •autopostback:
    a postback is performed automatically, for example when the selected value of a dropdown changes


    •callback:
    a method which is invoked when a certain event occurs such as clicking on a button. It also could have another meaning that a page performs a request back to the server (such as an AJAX request

  • #609164
    Autopostback - Property of the controlIsPostback - Property of the Page classAutopostback - get and set property to control postback on changes made for control.for e.g.this.ListBox1.AutoPostBack = true; whenever user will select item the page will get post back.


    IsPostback - get property of the Page class to check if page is post back i.e. if it is true then page has already executed Init function of the page else it is first time the page has requested to be executed.Hope it will help.


    autopostback: a postback is performed automatically, for example when the selected value of a dropdown changes.
    Controls that support AutoPostback includes:

    List item
    ListControl
    BulletedList
    CheckBoxList
    DropDownList
    ListBox
    RadioButtonList
    CheckBox
    TextBox

  • #609298
    AutopostBack posts the page to the server automatically whenever some changes is done in that controls data. Like Textbox text is changed it is automatically posted to server.
    Dropdownlist selected value changed.

    IsPostBack is used to check page is loaded for the first time or is reloaded. eg:
    if page is loaded for first time we enter the value in dropdownlist from database. If the page is reloaded we are not going to enter that value again. So we check for
    IsPostBack condition

    Regards,
    Sugandha
    Microsoft Certified Technology Specialist
    MY Blog..


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