DBColumn e DBLookup per tutti il browsers using AJAX

Code

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&ltNodeList.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&ltresultColXML.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&ltdata.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 he 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&ltNodeList.length; i++)
{
 tmplkpstr =tmplkpstr+sep+NodeList[i].getElementsByTagName("text")[0].childNodes[0].nodeValue
 sep="#"
 }
 finallkpresult = tmplkpstr.split("#")
 writeInCombo(finallkpresult,ObjCombo2)
 
 
}

Steps to use:

1. Make your first column categarized in view (which you wana use for dbcolumn and dblookup).

2. 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)

3. 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.

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