Hello Experts
in sales Order page there is Field External Document No. if we tried to enter value in page that already added and preseent in sales header table means if this field already have value in table Sales Header it should not allow same value to be entered I am unaware how to achive cah you please help me i tried following code but stuck on validate of Ecternal DOc no. of page
thnaks in Advance Experts
field("Ext Doc No."; Rec."Ext Doc No.")
{
ApplicationArea = All;
//FieldPropertyName = FieldPropertyValue;
trigger OnValidate()
var
salesH: Record "Sales Header";
begin
salesH.Reset;
SalesH.SetRange(salesH."No.", Rec."No.");
if SalesH.findfirst then begin
????
end;
end;
}
