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var req;
var attr
var xmlkey;
var resultColXML= new Array()
var resultlkpXML= new Array()
var ObjCombo1;
var ObjCombo2;
var lkpKey;
/*---------------------------
Dbcolumn function start here
-------------------*/
function dbColumn
(server,path,view,column,Subject)
{
ObjCombo1=Subject
//Put your first combo name
here to get dbcolumn result
var pos=0;
currURL =
(document.location.href).toLowerCase();
if (trim(server) == "")
{
pos = currURL.indexOf('://');
if (pos < 0 )
server = "http://10.50.3.107"
// Put your server name here
else
{
pos += 3;
pos = currURL.indexOf('/', pos);
server = currURL.substring(0, pos)
alert(server)
}
}
if( trim(path) == "" )
{
if( pos > 0 )
{
newPos = currURL.indexOf('.nsf',pos);
if (newPos > 0)
{
path = currURL.substring
(pos+1,newPos+4)
}
}
}
if( !isNaN(column) )
column -= 1;
vurl = trim(server)+"/"+
trim(path)+"/"+view+"?Readviewentries"
//checking whether browser is
Mozila or Netscape
if (window.XMLHttpRequest)
{
req = new XMLHttpRequest();
req.overrideMimeType('text/xml');
req.onreadystatechange =
processReqChange_Col;
req.open("GET", vurl , true);
req.send(null);
}
//checking whether browser is IE
else if (window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
if (req)
{
req.onreadystatechange =
processReqChange_Col;
req.open("GET", vurl, true);
req.send();
}
}
}
/* Function used to check whether
XML file loaded completely or not */
function processReqChange_Col()
{
if (req.readyState == 4)
/*Only process if XML
file is loaded completely:4="Complete" */
{
if (req.status == 200)
\/*Only process if everything is ok*/
{
response = req.responseXML.
documentElement;
populateColumn(response)
}
else
{
alert("There was a problem
retrieving he XML data:n" + req.statusText);
}
}
}
/* Function used to extract
value one by one from XML file */
function populateColumn(responseXML)
{
NodeList =
responseXML.getElementsByTagName
("viewentry")
for (var k=0;k<NodeList.length;k+=1)
{
child =
responseXML.getElementsByTagName
('text')[k].firstChild
while (child != null)
{
filterNode =
responseXML.getElementsByTagName
("viewentry")
var filterItem = filterNode.item(k);
posNumber = filterItem.getAttribute("position");
if (( child.nodeType == 3) &&
(posNumber.indexOf(".")==-1))
{
resultColXML[k] = trim(child.nodeValue);
}
child = child.nextSibling
}
}
var finalresult= new Array()
var tmpstr="";
var sep="";
for (var p=0;p<resultColXML.length;p++)
{
if (resultColXML[p] != '' && resultColXML[p] != null )
{
tmpstr =tmpstr+sep+trim(resultColXML[p])
sep="#"
}
}
finalresult = tmpstr.split("#")
writeInCombo(finalresult,ObjCombo1)
}
/* Function used to trim string */
function trim(str)
{
return str.replace(/^s+/g, '').replace(/s+$/g, '');
}
/*---------------------------
writing in combo function start here
-------------------*/
function writeInCombo(data,fldCombo)
{
fldCombo.length=0
fldCombo.length +=1
fldCombo[fldCombo.length-1].text = "--Select--"
for(iCount=0;iCount<data.length;iCount++)
{
fldCombo.length +=1
strText=data[iCount]
if (strText !=undefined && strText != null)
{
fldCombo[fldCombo.length-1].text = trim(strText)
}
}
}
/*---------------------------
Dblookup function start here
-------------------*/
function dbLookup(server,path,view,key,column,Name)
{
lkpKey=key
ObjCombo2=Name
//Put your second combo name
here to get dblookup result
var pos=0;
currURL = (document.location.href).toLowerCase();
if (trim(server) == "")
{
pos = currURL.indexOf('://');
if (pos < 0 )
server = "http://10.50.3.107"
// Put your server name here
else
{
pos += 3;
pos = currURL.indexOf('/', pos);
server = currURL.substring(0, pos)
alert(server)
}
}
if( trim(path) == "" )
{
if( pos > 0 )
{
newPos = currURL.indexOf('.nsf',pos);
if (newPos > 0)
{
path = currURL.substring(pos+1,newPos+4)
}
}
}
if( !isNaN(column) )
column -= 1;
vurl = trim(server)+"/"+trim(path)+"/"+view+"?
Readviewentries&restricttocategory="+lkpKey
//checking whether browser is mozila or Netscape
if (window.XMLHttpRequest)
{
req = new XMLHttpRequest();
req.overrideMimeType('text/xml');
req.onreadystatechange =
processReqChange_lookup;
req.open("GET", vurl , true);
req.send(null);
}
//checking whether browser is IE
else if (window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
if (req)
{
req.onreadystatechange =
processReqChange_lookup;
req.open("GET", vurl, true);
req.send();
}
}
}
/* Function used to check whether
XML file loaded completely or not */
function processReqChange_lookup()
{
if (req.readyState == 4)
/*Only process if XML
file is loaded completely:4="Complete" */
{
if (req.status == 200)
/*Only process if everything is ok*/
{
response = req.responseXML.documentElement;
populatelookup(response)
}
else
{
alert("There was a problem retrieving
the XML data:n" + req.statusText);
}
}
}
/* Function used to extract
value one by one from XML file */
function populatelookup(responseXML)
{
NodeList =
responseXML.getElementsByTagName("viewentry")
var tmplkpstr="";
var sep="";
for(var i=0; i<NodeList.length; i++)
{
tmplkpstr =
tmplkpstr+sep+NodeList[i].getElementsByTagName
("text")[0].childNodes[0].nodeValue
sep="#"
}
finallkpresult = tmplkpstr.split("#")
writeInCombo(finallkpresult,ObjCombo2)
}
Steps to use:
- Make your first column categarized in view (which you wana use for dbcolumn and dblookup).
- Assume you have to combo on form. So, call function Dbcolumn on OnLoad of the form:
ObjCombo1=document.forms[0].Combo1; ObjCombo2=document.forms[0].Combo2; dbColumn("serverName", "DbName",viewname,1,Combo1) - When you select any option from combo1 then its respective value should come in second combo. So, call dblookup function on OnChange of first combo:
keyVal=ObjCombo1.options [ObjCombo1.selectedIndex].text; ObjCombo2.length=0 dbLookup("ServerName","DBName", viewname,keyVal,2,ObjCombo2)
The last parameter in both functions is comboBox name object, which is on your form used to display options.
If you run this script on a server using a fully qualified hostname (like http://www.myserver.com) as server it won't work and will create a security issue in both IE and Firefox, resulting in a Javascript security error.
To have it works with a fully qualified hostname, the two lines
vurl = trim(server)+"/"+trim(path)+"/"+
view+"?Readviewentries"
vurl = trim(server)+"/"+trim(path)+"/"+
view+"?Readviewentries&
restricttocategory="+lkpKey
must be changed to:
vurl = "/"+trim(path)+"/"+view+"?
Readviewentries"
vurl = "/"+trim(path)+"/"+view+"?
Readviewentries&restricttocategory="+lkpKey
—Renaud T.
******************************************
To allow this function to lookup multi-value fields from views, simply change the following function from this:
function populatelookup(responseXML)
{
NodeList =
responseXML.getElementsByTagName
("viewentry")
var tmplkpstr="";
var sep="";
for(var i=0; i<NodeList.length; i++)
{
tmplkpstr =
tmplkpstr+sep+NodeList[i].
getElementsByTagName
("text")[0].childNodes[0].nodeValue
sep="#"
]
finallkpresult = tmplkpstr.split("#")
writeInCombo(finallkpresult,ObjCombo2)
]
to this:
function populatelookup(responseXML)
{
NodeList = responseXML.
getElementsByTagName("viewentry")
var tmplkpstr="";
var sep="";
var multiNodeListNbr;
for(var i=0; i<NodeList.length; i++) {
// is this a multivalue list, then the
statement below will equal greater than 1
multiNodeListNbr
= NodeList[0].
getElementsByTagName("text").length;
if (NodeList[0].
getElementsByTagName("text").length == 1) {
tmplkpstr = tmplkpstr+sep+NodeList[i].
getElementsByTagName
("text")[0].childNodes[0].nodeValue;
sep="#"
] else {
// interate through all the list entrie
for (var z = 0; z <multiNodeListNbr; z++) {
tmplkpstr = tmplkpstr+sep+
NodeList[0].getElementsByTagName
("textlist")[0].getElementsByTagName
("text").item(z).firstChild.data; sep="#"
]
]
]
finallkpresult = tmplkpstr.split("#")
writeInCombo(finallkpresult,ObjCombo2)
]
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This was first published in September 2005