Change subgrid view dynamically by Javascript

Question

Hello,
In my current project Client
would like an activities view that shows related activities PLUS some fields from those activities.
Please let me know how to change subgrid view dynamically.
we are trying to get the same results as in the out of the box subgrid where you get the regarding activities but we want some additional fields such as the To from the phone
call activity
I am using below code to achieve this
// JavaScript source code
//Change the Fetch XML and set the subgrid ID
function UpdateSubGrid()
    var SubGrid = document.getElementById("Activities");
    if (SubGrid.readyState != "complete")
        //The subgrid hasn't loaded, wait 1 second and then try again
        setTimeout(UpdateSubGrid, 1000);
        return;
    var fetchXml = "<fetch version='1.0' output-format='xml-platform' mapping='logical' >" +
  "<entity name='activitypointer'>" +
   " <attribute name='subject' />" +
    "<attribute name='ownerid' />" +
    "<attribute name='prioritycode' />" +
    "<attribute name='regardingobjectid' />" +
    "<attribute name='activitytypecode' />" +
    "<attribute name='statecode' />" +
    "<attribute name='scheduledstart' />" +
    "<attribute name='scheduledend' />" +
    "<attribute name='activityid' />" +
    "<attribute name='instancetypecode' />" +
    "<attribute name='community' />" +
    "<order attribute='scheduledend' descending='false' />" +
    "<filter type='and'>" +
    " <condition attribute='isregularactivity' operator='eq' value='1' />" +
    "</filter>" +
    "<link-entity name='phonecall' from='activityid' to='activityid' visible='false' link-type='outer' alias='phonecalllinkage'>" +
    " <attribute name='from' />" +
    " <attribute name='to' />" +
    "</link-entity>" +
    "<link-entity name='task' from='activityid' to='activityid' visible='false' link-type='outer' alias='tasklinkage'>" +
    " <attribute name='percentcomplete' />" +
    "</link-entity>" +
    "</entity>" +
"</fetch>";
   // fetchXml
    //Set Fetch XML
    //Inject the new fetchXml..
    SubGrid.control.SetParameter("fetchXml", fetchXml);
    //Force the subgrid to refresh
    SubGrid.control.refresh();
Many thanks in advance.
Harsha

Answer 1

Hi Pedro,
Thank you for your response.
Actual requirement is Client
would like an activities view that shows related activities PLUS some fields from those activities. I tried out of box this first but it is not achievable because some entities are not available in entities list to select columns.
I want to add coulns from related entity inside grid.
Please let me know how I can achieve this through IFrame, Plugin or ssrs report?
Thanks in advance.
Harsha