IsPostback RSS

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  Hari869

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  IsPostback

  Jan 23, 2013 05:58 AM|LINK

  Hi,

  I have a doubt.. Please help me on clarifying this.

  what will be the impact on IsPostback if i select from drop down?

  What will be the impact on IsPostback if i clicks on button on page?

  How this is different from each other.?

  Thanks,
  Harish
  • Moved by MetalAsp.Net on Jan 23, 2013 06:36 AM
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  anuj_koundal

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  Re: IsPostback

  Jan 23, 2013 06:01 AM|LINK

  Both are same and Whole page and contents will reloads on Postback.

  http://dotnet.tekyt.info/?p=30

  
  
  

  Mark as Answer on the post that helps you.
  
  Regards
  Anuj Koundal
  
  • Edited by anuj_koundal on Jan 23, 2013 06:01 AM
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  brijeshvaidy...

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  Re: IsPostback

  Jan 23, 2013 06:02 AM|LINK

  if you set your dropdown feature, autopostback="true"

  then when change in ddl, the pase is post back otherwise not.

  and on button click it will always post back if it has any cliked event written on code behind otherwise not.

  Regards,
  Brijesh Vaidya
  India
  • Edited by Hari869 on Jan 23, 2013 06:42 AM
  • Edited by Hari869 on Jan 23, 2013 06:42 AM
  • Edited by Hari869 on Jan 23, 2013 06:42 AM
  • Edited by Hari869 on Jan 23, 2013 06:44 AM
  • Marked as answer by Hari869 on Jan 23, 2013 07:19 AM
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  Hari869

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  Re: IsPostback

  Jan 23, 2013 06:16 AM|LINK

  Thanks for clarify this ...

  On basis of this i understood that for the first time when page loads IsPostback value will be false. and for ever next time when i change the value of ddl, IsPostback value will be false assuming that autopostback for dropdown is set to "true". But I am getting IsPostback as "false" every time when i selects value from ddl. Can you please suggest what could be the reason ?

  Thanks in advance.

  Thanks,
  Harish
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  anuj_koundal

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  Re: IsPostback

  Jan 23, 2013 06:31 AM|LINK

  If you use 

  <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true">
      </asp:DropDownList>

  Then every time you select an item in the dropdown list this will send request to the server and your whole page will reloads. 

  if Used like this

     <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="false">
      </asp:DropDownList>

  Then No request will be made to server for page reload.
  
  
  

  Mark as Answer on the post that helps you.
  
  Regards
  Anuj Koundal
  
  • Edited by Hari869 on Jan 23, 2013 06:43 AM
  • Edited by Hari869 on Jan 23, 2013 06:44 AM
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  Hari869

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  Re: IsPostback

  Jan 23, 2013 06:41 AM|LINK

  Hello Anuj,

  Thanks for your reply ...

  But everything is fine in DropDownList AutoPostBack is set to "true" even though i have same problem

  I have a doubt on EnableViewState of page which is set to ture

  EnableViewState="true"

  
  Can anyone please advice .....

  Thanks,

  Harish

  Thanks,
  Harish
  • Edited by Hari869 on Jan 23, 2013 06:43 AM
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  anuj_koundal

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  Re: IsPostback

  Jan 23, 2013 06:46 AM|LINK

  EnableViewState is always true this is the mechanisim of Asp .net to maintain the state of the stateless pages. 

  What's your actual problem Is? Can you explain?

  Mark as Answer on the post that helps you.
  
  Regards
  Anuj Koundal
  
  • Marked as answer by Hari869 on Jan 23, 2013 07:19 AM
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  Hari869

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  8 Posts

  Re: IsPostback

  Jan 23, 2013 06:53 AM|LINK

  Problem is whenever I am selecting value from drop down, i am getting IsPostback value as false. I have varified AutoPostBack property of ddl which is set to "true". Can there be any other reason for this. ? kindly suggest.

  Thanks,
  Harish
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  anuj_koundal

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  Re: IsPostback

  Jan 23, 2013 06:56 AM|LINK

  Hari869

  i am getting IsPostback value as false.

  How do you checking this

  Mark as Answer on the post that helps you.
  
  Regards
  Anuj Koundal
  
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  matifnadeem

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  Re: IsPostback

  Jan 23, 2013 06:58 AM|LINK

  Hari869

  I have a doubt.. Please help me on clarifying this. what will be the impact on IsPostback if i select from drop down? What will be the impact on IsPostback if i clicks on button on page? How this is different from each other.?

  Hi Hari869,

  Yes there is 1 difference between both controls present when dropdownlist doesn't have AutoPostBack property is set true. 

  1. Whenever you click Asp.net Button, Postback occurs
  2. When you set AutoPostBack="true" in Asp.Net Dropdownlist, then postback occurs otherwise not.

  Whenever Postback occurs, whole page is reload if you are not using any update panel.

  Let me know if any query remains.

  Cheers

  
  M Atif Nadeem
  Mark as Answer if you got right thing
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