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04.11.2008 at 01:40PM PDT, ID: 23316416
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9.8

How do I get "xmlHttp.open("POST",url,true)" to work

Asked by TheInnovator in JavaScript

Tags:

The code below is an ASP and AJAX it works fine with this code in Javascript "(xmlHttp.open("GET",url,true)"

but when I change it to "xmlHttp.open("POST",url,true)", I get a blank page when I try to run it.

What am I doing wrong?

Thanks.Start Free Trial 
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---------------------------------------------------------------------------------------------------------------------------------------------
AJAX_Form.asp
---------------------------------------------------------------------------------------------------------------------------------------------
<html>
<head>
<!-- <script src="selectuser.js"></script> --->
<script language="javascript">
var xmlHttp
 
function showUser(str)
{
    xmlHttp=GetXmlHttpObject() //See if it works with users browser.
   
    if (xmlHttp==null)
     {
         alert ("Browser does not support HTTP Request")
         return
     }
        var url="AJAX_getcustomer.asp"
        url=url+"?q="+str
        //url=url+"&sid="+Math.random()
        xmlHttp.onreadystatechange=stateChanged //calls the stateChanged() function
        xmlHttp.open("POST",url,true)  '<--When I change to post I get a 'blank page
        xmlHttp.send(null)
}
 
 
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 {
 document.getElementById("txtHint").innerHTML=xmlHttp.responseText
 }
}
 
 
function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    try
      {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    catch (e)
      {
      alert("Your browser does not support AJAX!");
      return false;
      }
    }
  }
 
  return xmlHttp;
}
 
 
</script>
</head>
<body>
 
<form>
    Select a User:
    <select name="users" onchange="showUser(this.value)">
        <option value="1">John Smith1</option>
        <option value="2">John Smith2</option>
        <option value="3">John Smith3</option>
        <option value="4">John Smith4</option>
    </select>
</form>
 
<p>
<div id="txtHint"><b>User info will be listed here.</b></div>
</p>
 
</body>
</html>
 
---------------------------------------------------------------------------------------------------------------------------------------------
AJAX_getcustomer.asp
---------------------------------------------------------------------------------------------------------------------------------------------
<!--#include file = "./includes/ajax_DBConnOpen.asp" -->
<%
response.expires=-1
sql="SELECT * FROM tbl_AJAX_example WHERE uid="
sql=sql & "'" & request.querystring("q") & "'"
 
set rs = Server.CreateObject("ADODB.recordset")
rs.Open sql, dbconn
 
response.write("<table>")
do until rs.EOF
  for each x in rs.Fields
    response.write("<tr><td><b>" & x.name & "</b></td>")
    response.write("<td>" & x.value & "</td></tr>")
  next
  rs.MoveNext
loop
 
response.write("</table>")
%>
---------------------------------------------------------------------------------------------------------------------------------------------
**************************************************************************************************************
---------------------------------------------------------------------------------------------------------------------------------------------
 
---------------------------------------------------------------------------------------------------------------------------------------------
ajax_DBConnOpen.asp
---------------------------------------------------------------------------------------------------------------------------------------------
<%
'Create an ADO Connection object
Set DBConn = Server.CreateObject("ADODB.Connection")
    'response.end
'Open the connection to the database
DSN = "Driver={SQL Server};Server=localhost;database=darpasid_production_oba;uid=xxx;pwd=xxxxx;"
DBConn.Open DSN
%>
---------------------------------------------------------------------------------------------------------------------------------------------
**************************************************************************************************************
---------------------------------------------------------------------------------------------------------------------------------------------
[+][-]04.11.2008 at 01:52PM PDT, ID: 21338142

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About this solution

Zone: JavaScript
Tags: ASP, AJAX
Sign Up Now!
Solution Provided By: hielo
Participating Experts: 2
Solution Grade: A
 
 
[+][-]04.11.2008 at 02:08PM PDT, ID: 21338242

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

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[+][-]04.11.2008 at 04:22PM PDT, ID: 21338935

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

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