How to add a custom filter on list or inquiry form in D365

Hi,

How to add a custom filter on list or inquiry form in D365

Reference AX 2012


 [DataSource]
    class SalesLine
    {
        /// <summary>
        ///
        /// </summary>
        public void executeQuery()
        {



QueryBuildRange QcustomerFilter;

QcustomerFilter = SysQuery::findOrCreateRange(SalesLine_q.datasourceTable(tableNum(SalesLine)),fieldNum(SalesLine,CustAccount));

  FormRun             element       = this.formRun();
        FormStringControl txtCustomerNumber= element.design(0).controlName("txtCustomerNumber");

if (txtCustomerNumber.text()!=””)

{

QcustomerFilter.value(queryValue(txtCustomerNumber.text()));



}

else

{

QcustomerFilter.value(SysQuery::valueUnlimited());

}

            super();
        }
    }