application end RSS

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  sweetyPaul

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  5 Points

  36 Posts

  application end

  Apr 27, 2009 10:51 AM|LINK

  Hi all,

  how to save  the data in an application when that application(browser)closing.

   

  rgds

  sp

  • Moved by HeartattacK on Apr 27, 2009 10:53 AM
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  kavita_khand...

  Star

  9767 Points

  1930 Posts

  Re: application end

  Apr 27, 2009 11:30 AM|LINK

  if user is closing the bwoser  using the cross button at the top right.. i think u can not do anything about it.

  Please mark this post as Answer if it is of help to you!
  I would love to change the world, but they wont give me the source code.
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  farazsk11

  Star

  8347 Points

  1384 Posts

  Re: application end

  Apr 27, 2009 11:54 AM|LINK

  Hi,

  Well probably Application_End will not be the right direction as you don't know when it will be called. It doesn't mean that when you close your browser application end event will call. However you can try using Session_End event and it will be called when the session will expire. So even if you close the browser Session_End event will be called when it reaches the timeout period which is by default 20 minutes.

   

  Faraz Shah Khan
  SFDC Certified Developer, MCP, MCAD.Net, MCSD.Net, MCTS-Win/Web, MCPD-Web
  Blog
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  avicool08

  Member

  710 Points

  272 Posts

  Re: application end

  Apr 27, 2009 11:58 AM|LINK

  sweetyPaul

  Hi all,

  how to save  the data in an application when that application(browser)closing.

   

  rgds

  sp

   

  Try this:

  <script type="text/javascript">
  <!--
  var g_isPostBack = false;

  function onBeforeUnload()
  {
   if ( g_isPostBack == true )
    return; // Let the page unload

   if ( window.event )
    window.event.returnValue = 'You will lose any unsaved changes!'; // IE
   else
    return 'You will lose any unsaved changes!'; // FX
  }
  window.onbeforeunload = onBeforeUnload;
  // -->
  </script>

  In the CodeBehind:
  private void Page_Load(object sender, System.EventArgs e)
  {
   RegisterOnSubmitStatement("OnSubmitScript", "g_isPostBack = true;");
  }

   

  http://forums.asp.net/t/1370273.aspx

  Regards
  Abinash Tumulu
  
  Please mark my reply as an
  answer
  if it helps.
  
  Visit my blog .net Scanner
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  NC01

  All-Star

  82577 Points

  15430 Posts

  MVP

  Re: application end

  Apr 27, 2009 12:45 PM|LINK

  To save data to a database when a page is closed, you will need to use AJAX. Here is an example:

  //////////////////////////////////////////////////////////////////////////
  // Page1.aspx
  //////////////////////////////////////////////////////////////////////////

  <script type="text/javascript">
  <!--
  var g_isPostBack = false;

  function callAjax(webUrl, queryString)
  {
   var xmlHttpObject = null;

   try
   {
    // Firefox, Opera 8.0+, Safari...

    xmlHttpObject = new XMLHttpRequest();
   }
   catch(ex)
   {
    // Internet Explorer...

    try
    {
     xmlHttpObject = new ActiveXObject('Msxml2.XMLHTTP');
    }
    catch(ex)
    {
     xmlHttpObject = new ActiveXObject('Microsoft.XMLHTTP');
    }
   }

   if ( xmlHttpObject == null )
   {
    window.alert('AJAX is not available in this browser');
    return;
   }

   xmlHttpObject.open("GET", webUrl + queryString, false);
   xmlHttpObject.send();

   var valueSent = xmlHttpObject.responseText;

   return valueSent;
  }
  function doUpdate()
  {
   var webUrl = 'AjaxPage.aspx';

   // Add any additional values needed for the update to the QueryString...
   var queryString = '?CallRequest=UpdateDatabase&DbKey=1234';

   var returnCode = callAjax(webUrl, queryString);

   //alert('returnCode: ' + returnCode);
  }

  function windowOnBeforeUnload()
  {
   if ( g_isPostBack == true )
    return; // Let the page unload

   if ( window.event )
    window.event.returnValue = 'You will lose any unsaved changes!'; // IE
   else
    return 'You will lose any unsaved changes!'; // FX
  }
  function windowOnUnload()
  {
   if ( g_isPostBack == true )
    return; // Let the page unload

   doUpdate();
  }

  window.onbeforeunload = windowOnBeforeUnload;
  window.onunload = windowOnUnload;
  // -->
  </script>

  //////////////////////////////////////////////////////////////////////////
  // Page1.aspx.cs
  //////////////////////////////////////////////////////////////////////////

  protected void Page_Load(object sender, EventArgs e)
  {
   this.ClientScript.RegisterOnSubmitStatement(this.GetType(), "OnSubmitScript", "g_isPostBack = true;");
  }

  //////////////////////////////////////////////////////////////////////////
  // AjaxPage.aspx.cs
  //////////////////////////////////////////////////////////////////////////

  protected string UpdateDatabase(string dbKey)
  {
   string returnValue = "OK";

   // Update the database here setting the returnValue variable to "Failed" if not successful...

   return returnValue;
  }

  private void Page_Load(object sender, System.EventArgs e)
  {
   string callRequest = (this.Request["CallRequest"] == null) ? string.Empty : this.Request["CallRequest"];
   string returnValue = string.Empty;

   if ( callRequest == "UpdateDatabase" )
   {
    string dbKey = (this.Request["DbKey"] == null) ? string.Empty : this.Request["DbKey"];
    returnValue = UpdateDatabase(dbKey);
   }

   this.Response.ClearHeaders();           
   this.Response.Clear();
   this.Response.Write(returnValue);
   this.Response.End();
  }

  NC...
  

  • Edited by NC01 on Apr 27, 2009 12:58 PM
  • Marked as answer by Lance Zhang - MSFT on Apr 30, 2009 07:47 AM