Populate Lookup value on selection of another Lookup

 Step 1.

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Step 2.
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Step 3.
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Let me explain the scenario…

Suppose we have City Lookup on Lead entity and we want to populate Region (Lookup), State (Lookup) and Zone (Lookup) on selection of particular City from City Lookup. You need to write below code on OnChange event of City Lookup field.

if(crmForm.all.new_cityid.DataValue !=null)

{

    var citylookupValues = crmForm.all.new_cityid.DataValue;

    if(citylookupValues[0] !=null)

    {

        var cityID = citylookupValues[0].id;

        var regionID = GetAttributeValueFromID(“new_city”, cityID , “new_regionid”);

        var stateID = GetAttributeValueFromID(“new_city”, cityID , “new_stateid”);

        var zoneID = GetAttributeValueFromID(“new_region”, regionID , “new_zoneid”);   

        if(regionID != null)

        {

            //Create an array to set as the DataValue for the lookup control.

            var regionlookupData = new Array();

            //Create an Object add to the array.

            var regionlookupItem= new Object();

            //Set the id, typename, and name properties to the object.

            regionlookupItem.id = regionID;

            regionlookupItem.typename = ‘new_region’;

            regionlookupItem.name = regionName;

            // Add the object to the array.

            regionlookupData[0] = regionlookupItem;

            // Set the value of the lookup field to the value of the array.

            crmForm.all.new_regionid.DataValue = regionlookupData;

            crmForm.all.new_regionid.ForceSubmit = true;

        }

        if(stateID != null)

        {

            //Create an array to set as the DataValue for the lookup control.

            var statelookupData = new Array();

            //Create an Object add to the array.

            var statelookupItem = new Object();

            //Set the id, typename, and name properties to the object.

            statelookupItem.id = stateID;

            statelookupItem.typename = ‘new_state’;

            statelookupItem.name = stateName;

            // Add the object to the array.

            statelookupData[0] = statelookupItem;

            // Set the value of the lookup field to the value of the array.

            crmForm.all.new_stateid.DataValue = statelookupData;

            crmForm.all.new_stateid.ForceSubmit = true;

        }

        if(zoneID != null)

        {

            var zoneName = GetAttributeValueFromID(“new_zone”, zoneID, “new_name”);

            //Create an array to set as the DataValue for the lookup control.

            var zonelookupData = new Array();

            //Create an Object add to the array.

            var zonelookupItem = new Object();

            //Set the id, typename, and name properties to the object.

            zonelookupItem.id = zoneID;

            zonelookupItem.typename = ‘new_zone’;

            zonelookupItem.name = zoneName;

            // Add the object to the array.

            zonelookupData[0] = zonelookupItem;

            // Set the value of the lookup field to the value of the array.

            crmForm.all.new_zoneid.DataValue = zonelookupData;

            crmForm.all.new_zoneid.ForceSubmit = true;

        }

     }

}

else

{

     crmForm.all.new_regionid.DataValue = null;

    crmForm.all.new_stateid.DataValue = null;

    crmForm.all.new_zoneid.DataValue = null;

}

function  GetAttributeValueFromID(sEntityName, sGUID, sAttributeName)

{

    /*

    * sEntityName: the name of the CRM entity (account, etc.)

    * whose attribute value wish to look up

    * sGUID: string representation of the unique identifier of the specific object whose attrbuite value we wish to look up

    * sAttributeName – the schema name of the attribute whose value we wish returned

    */

    var sXml = “”;

    //var oXmlHttp = new ActiveXObject(“Msxml2.XMLHTTP”);

    var oXmlHttp = new ActiveXObject(“Msxml2.XMLHTTP.6.0″);

    //var serverurl = “http://10.10.40.50:5555″;

    var serverurl = “”;

    //set up the SOAP message

    sXml += “<?xml version=\”1.0\” encoding=\”utf-8\” ?>”;

    sXml += “<soap:Envelope xmlns:soap=\”http://schemas.xmlsoap.org/soap/envelope/\”"

    sXml += ” xmlns:xsi=\”http://www.w3.org/2001/XMLSchema-instance\”"

    sXml += ” xmlns:xsd=\”http://www.w3.org/2001/XMLSchema\”>”;

    sXml += “<soap:Body>”;

    sXml += “<entityName xmlns=\”http://schemas.microsoft.com/crm/2006/WebServices\”>” +

    sEntityName + “</entityName>”;

    sXml += “<id xmlns=\”http://schemas.microsoft.com/crm/2006/WebServices\”>” +

    sGUID + “</id>”;

    sXml += “<columnSet xmlns=\”http://schemas.microsoft.com/crm/2006/WebServices\”"

    sXml += ” xmlns:q=\”http://schemas.microsoft.com/crm/2006/Query\”"

    sXml += ” xsi:type=\”q:ColumnSet\”><q:Attributes><q:Attribute>” +

    sAttributeName + “</q:Attribute></q:Attributes></columnSet>”;

    sXml += “</soap:Body>”;

    sXml += “</soap:Envelope>”;

    // send the message to the CRM Web service

    oXmlHttp.Open(“POST”, serverurl +

    “/MsCrmServices/2006/CrmService.asmx”,false);

    oXmlHttp.setRequestHeader(“SOAPAction”,

    “http://schemas.microsoft.com/crm/2006/WebServices/Retrieve&#8221;);

    oXmlHttp.setRequestHeader(“Content-Type”, “text/xml; charset=utf-8″);

    oXmlHttp.setRequestHeader(“Content-Length”, sXml.length);

    oXmlHttp.send(sXml);

    // retrieve response and find attribute value

    //var result = oXmlHttp.responseXML.selectSingleNode(“//” + sAttributeName);

    var result = oXmlHttp.responseXML.selectSingleNode(“//*[local-name()=\""+  sAttributeName +"\"]“);

    if (result == null)

    {

    return “”;

    }

    else

    return result.text;

}

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