asked on

how do get a drop down values filled as I am typing

ok, the ajax code is working and I do get the returned value in

document.getElementById("txtHint").innerHTML = xmlhttp.responseText;

but I really want the value to change in the field I am typing the value or the field becomes a dropdown as I am typing.

<input type="text" name="txtn1" id="txt1" .....................


CODE:
<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
<script type="text/javascript">
    function showHint(str)
{
var xmlhttp;
if (str.length==0)
  { 
  document.getElementById("txtHint").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
       document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
   
    }
  }
xmlhttp.open("GET","ajaxresponse.aspx?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<h3>Start typing a name in the input field below:</h3>
<form id="form1" action=""> 
First name: <input type="text" name="txtn1" id="txt1" onkeyup="showHint(this.value)" />

<p>Suggestions: <span id="txtHint"></span></p> 
</form>



server file CODE

<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">
      <title></title>
 
</head>
<body>
    <form id="form1" runat="server">
    <div>
   
    <%
Response.Expires=-1;
string[] a = new string[30];

//Fill up array with names
a[1]="Anna";
a[2]="Brittany";
a[3]="Cinderella";



//get the q parameter from URL
string q=Request.QueryString["q"];
q=q.ToUpper();
  string hint="";

//lookup all hints from array if length of q>0
if (q.Length>0)
{
  for (int i=1;i<30;i++)
  {/*
    if(q=ucase(mid(a[i].,1,len(q))) then
      if hint="" then
        hint=a(i)
      else
        hint=hint & " , " & a(i)
      end if
    end if
    */
    }
    }
    hint=a[1];
//'Output "no suggestion" if no hint were found
//'or output the correct values
    if (hint == "")
        Response.Write("no suggestion");
    else
        Response.Write(hint);
  
%>
   
    
    </div>
    </form>
</body>
</html>

Open in new window

leakim971

check this threads :
https://www.experts-exchange.com/questions/27278251/classic-asp-ajax-reading-db.html
https://www.experts-exchange.com/questions/26568116/Ajax-autocomplete-using-Classic-asp-and-SQL-server.html

test page : http://view.jquery.com/trunk/plugins/autocomplete/demo/

goodk

ASKER

when I down loaded the code, it appeared very complex and I just could not get it to work on asp.net browser.
http://view.jquery.com/trunk/plugins/autocomplete/demo/

I looked at the other links also, but I just confused myself more.

If you kindly see my code it is working; all I am asking is how to modify the input field I have?

May be I am asking a help of couple of lines of code. (I think?) thanks

leakim971

1 - Please confirm you like it (check the first textbox on the demo link) and it answer your question fully

Some lines of code (all propose a basic template, an input field in the page, nothing more) :
http://blogs.msdn.com/b/joecar/archive/2009/01/08/autocomplete-with-asp-net-mvc-and-jquery.aspx
http://ericdotnet.wordpress.com/2009/04/09/jquery-search-box-and-aspnet-mvc/
http://www.dotnetcurry.com/ShowArticle.aspx?ID=515

You need to accept there's more than a little update of your code to provide what you want
Else you may create a basic javascript array on the fly with c# but you will miss the main advantage of ajax (one of the zones you selected)

goodk

ASKER

is it possible to write the AJAX based dropdown without using mvc or jquery but just expand on the following comprehensive example?

http://www.w3schools.com/ajax/ajax_aspphp.asp

my question was how to expand the above example? thanks

leakim971

replace this part :

if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
    }

Open in new window

by :

if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint").innerHTML="<div class='dropdown' onclick='alert(this.innerHTML)'>" + xmlhttp.responseText.split(" , ").join("</div></div class='dropdown' onclick='alert(this.innerHTML)'>") + "</div>";
    }

Open in new window

goodk

ASKER

I tried it into all three ids but nothing changed, can you kindly try it?

<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function showHint(str)
{
var xmlhttp;
if (str.length==0)
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
// document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
// document.getElementById("Text1").value = xmlhttp.responseText;
document.getElementById("Text1").innerHTML = "<div class='dropdown' onclick='alert(this.innerHTML)'>" + xmlhttp.responseText.split(" , ").join("</div></div class='dropdown' onclick='alert(this.innerHTML)'>") + "</div>";
// document.getElementById("txtHint").innerHTML = "<div class='dropdown' onclick='alert(this.innerHTML)'>" + xmlhttp.responseText.split(" , ").join("</div></div class='dropdown' onclick='alert(this.innerHTML)'>") + "</div>";
// document.getElementById("txt1").innerHTML = "<div class='dropdown' onclick='alert(this.innerHTML)'>" + xmlhttp.responseText.split(" , ").join("</div></div class='dropdown' onclick='alert(this.innerHTML)'>") + "</div>";

// document.form1.text1.value = xmlhttp.responseText;
}
}
xmlhttp.open("GET","ajaxresponse.aspx?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<h3>Start typing a name in the input field below:</h3>
<form id="form1" action="">
First name: <input type="text" name="txtn1" id="txt1" onkeyup="showHint(this.value)" />
<input type="text" name="Text1" id="Text1" />
<p>Suggestions: <span id="txtHint"></span></p>
</form>

</body>
</html>

goodk

ASKER

I think this is a big problem on Expert-Exchange that if the person helping you do not know the solution or do not want to help further that he does not have way to pass it on to someone else.

I am still waiting for help;

thanks

leakim971

replace :
.join("</div></div class
by :
.join("</div><div class

use : document.getElementById("txtHint").innerHTML = "<div class='dropdown' onclick='alert(this.innerHTML)'>" + xmlhttp.responseText.split(" , ").join("</div><div class='dropdown' onclick='alert(this.innerHTML)'>") + "</div>";

you will need to play with css to have a better design of the dropdown and put it where you want
you will need to hide it once the user choose an option

leakim971-519939.flv

ASKER CERTIFIED SOLUTION

leakim971

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

goodk

ASKER

thanks a lot for your help;

this was fairly simple once I understood how to menupulate innerhtml

I learned a lot this way; no fun using jquery and other partial libraries