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How to show a "Loading..." icon when page is loading?

Posted on 2004-04-18
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Last Modified: 2008-02-26
I have used the following code, but I still get a blank page when the data is loading. How do I display a "loading..." when the data is loading and disappear after that?

<%

  out.println("Loading...");

  String recordSQL = "SELECT * from BS_PERSON ";                                                    
  ResultSet rset = CM.executeQuery(recordSQL);
  while (rset.next()) {
      out.println(rset.getString("USERNAME");    
  }
 %>

Thank you.
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Question by:Tuan_Jean
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5 Comments
 
LVL 7

Expert Comment

by:searlas
ID: 10857692
This needs two answers.  First, to get "Loading..." displayed straight off you need to call out.flush() straight after your "Loading..." println (required, because your JSP output is probably bufffered by default.)

Secondly, getting the 'Loading...' message to disappear after the page has loaded.  One option is to wrap the 'loading' message in an HTML tag (div/span/h1 etc.) and then use a Javascript onload handler to hide it, like this:

<body onLoad="document.getElementById('loading').style.display = 'none'">
<div id="loading">Loading....</div>
<%
  out.flush();
  String recordSQL = "SELECT * from BS_PERSON ";                                                    
  ResultSet rset = CM.executeQuery(recordSQL);
  while (rset.next()) {
      out.println(rset.getString("USERNAME");    
  }
%>
0
 
LVL 1

Expert Comment

by:cpuburst
ID: 10859606
Hi Jean,

Suppose, If you have two pages, a.jsp and b.jsp, Put a page in between them, say loading.html
which displays whatever message or image you want to show to the user viz. "Page is loading..please wait."

Now a.jsp has to submit to loading.html and in the body onload event of loading.html, submit, the form in loading.html
to b.jsp. This will ensure, the user sees the loading.html until b.jsp processing is done and data flushed to the client.

Cheers
Cpuburst
0
 
LVL 6

Accepted Solution

by:
jarasa earned 20 total points
ID: 10860337
0
 

Author Comment

by:Tuan_Jean
ID: 10864737
Thank you all for your answer. I have tried the out.flush method and it does not work very well because I can see loading... and the records together.

How can I split the points for cpuburst and jarasa?
0
 
LVL 6

Expert Comment

by:jarasa
ID: 10866520
I guess is too late now.
Javier
0

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