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

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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
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Solution Provided By: hielo
Participating Experts: 2
Solution Grade: A
 
 
[+][-]04.11.2008 at 02:08PM PDT, ID: 21338242

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

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