Hi,
I am new to AX. I have used a display field and tried to fillter that field by using Filter by field, Filter by selection option. when i tried to clear the filter it clears all the data from the form. The form looks empty and an error is popping like shown in the screenshot. Here i have attached my code also. Help me on this.
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');
;
q = SalesLine_ds.query();
qb1 = q.dataSourceTable(tablenum(SalesLine));
//qb1 = qb1.addDataSource(TableNum(CustTable));
//qb1.addLink(FieldNum(SalesLine,CustAccount),FieldNum(CustTable,AccountNum));
//qb1 = qb1.addDataSource(TableNum(SalesLine));
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
qb1.addRange(FieldNum(SalesLine,CustAccount)).value(strtext);
SalesLine_ds.query(Q);
SalesLine_ds.executeQuery();
}
break;
case b: // Filter By Selection
qb1.addRange(FieldNum(SalesLine,CustAccount)).value(customeraccount.valueStr());
SalesLine_ds.query(Q);
SalesLine_ds.executeQuery();
break;
case c : // Remove Filter
q = new Query();
qb1 = q.addDataSource(tablenum(SalesLine));
qb1.clearLinks();
qb1.clearRanges();
SalesLine_ds.query(Q);
SalesLine_ds.removeFilter();
break;
Default:
break;
}
}
. 
Regards,
Ram
