How to: Get and Set a Lookup Value in Jscript in Microsoft Dynamics CRM 2011

This is one of those posts that comes from the fact that there are a lot of questions in the forums that relate to this topic and there are a lot of good posts that demonstrate either how to set a lookup value or get a lookup value, but there aren't many that show both.  So that is what we will do today.

Here is a quick demo on how to either get or set a lookup value in Jscript in Microsoft Dynamics CRM 2011:

 //Get a lookup value 
    var lookupItem = new Array(); 
    lookupItem = Xrm.Page.getAttribute("yourAttributeSchemaName").getValue();
 
    if (lookupItem != null) 
    {
 
        var name = lookupItem[0].name; 
        var guid = lookupItem[0].id; 
        var entType = lookupItem[0].entityType;
    }
 

 
 //Set a lookup value
    var value = new Array();
    value[0] = new Object();
    value[0].id = idValue;
    value[0].name = textValue;
    value[0].entityType = typeValue;
    Xrm.Page.getAttribute("yourAttributeSchemaName").setValue(value);
 
 
 //or alternatively you can set it like this
   Xrm.Page.getAttribute("yourAttributeSchemaName").setValue( [{id: idValue, name: textValue, entityType: typeValue}]);

Note: You must wrap your code in a function in CRM 2011 to be called by an event handler.  This is achieved by using the syntax below:

function test()
{
   //my jscript code here!
}

Now you can just call your function name from an event handler by specifying the web resource and the function name "test".