Add filter on display method on form control in AX 2012 R3

Hi guys,

Here I have added display method ("displayInternalPackingSlipId" set auto declaration as yes on form control) to display GSN number on the “VendPackingSlipJour” form. In this form main data source is “VendPackingSlipJour”.
Override context method as bellow on display method control  and modified logic as per need.

public void context()
{
    int             selectedMenu;
    formrun         fr;
    Args            ag;
    Name            strtext;
    querybuilddataSource qb1;
    queryrun    qr;
    query       q;
    PopupMenu menu = new PopupMenu(element.hWnd());
    int a = menu.insertItem('Filter By Field');
    int b = menu.insertItem('Filter By Selection');
    int c = menu.insertItem('Remove Filter');
    ;

    selectedMenu = menu.draw();
    switch (selectedMenu)
    {
    case -1: //Filter by field
            break;
    case a:
            ag = new args('SysformSearch');
            fr = new formrun(ag);
            fr.run();
            fr.wait();
    //Reading User entered value for filter process
            strtext = fr.design().controlName('FindEdit').valueStr();
            if(strtext)
            {
    //Creating a query for filter
                q   = vendPackingSlipJour_ds.query();
                qb1 = q.dataSourceTable(tablenum(VendPackingSlipJour));
                qb1 = qb1.addDataSource(TableNum(VendPackingSlipVersion));
                qb1.addLink(FieldNum(VendPackingSlipJour,Recid),FieldNum(VendPackingSlipVersion,VendPackingSlipJour));
                qb1.addRange(FieldNum(VendPackingSlipVersion,InternalPackingSlipId)).value(strtext);
                vendPackingSlipJour_ds.query(Q);
                vendPackingSlipJour_ds.executeQuery();
            }
            break;

    case b:   // Filter By Selection
            q   = vendPackingSlipJour_ds.query();
            qb1 = q.dataSourceTable(tablenum(VendPackingSlipJour));
            qb1 = qb1.addDataSource(TableNum(VendPackingSlipVersion));
            qb1.addLink(FieldNum(VendPackingSlipJour,RecId),FieldNum(VendPackingSlipVersion,VendPackingSlipJour));
            qb1.addRange(FieldNum(VendPackingSlipVersion,InternalPackingSlipId)).value(displayInternalPackingSlipId.valueStr());
            vendPackingSlipJour_ds.query(Q);
            vendPackingSlipJour_ds.executeQuery();
            break;
    case c :   // Remove Filter
            q   = new Query();
            qb1 = q.addDataSource(tablenum(VendPackingSlipJour));
            qb1.clearLinks();
            qb1.clearRanges();
            vendPackingSlipJour_ds.query(Q);
            vendPackingSlipJour_ds.removeFilter();
            break;

    Default:
            break;
    }

}

Happy DAXing.