delphi 6 - how to use the function "copy" to assign a UTF-8 value to a variable -

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i use following code assign text sql parameter: 

quinsert.parameters.parambyname('veh_type').value := copy(s,11,1);

sometimes text in .txt file reading in utf-8, has characters using 2 bytes. how can change following code accept utf-8 data?

procedure tprepareform.button1click(sender: tobject); var   f : textfile;   s : string;   : integer;   isansistring : boolean; begin   quinsert   begin     close;     sql.clear;     sql.add('insert v_info_2018');     sql.add('(record_type, plate_group, plate_no, v_type, v_type_cn,');     sql.add('v_type_pt, v_type_pt, v_brand, engine_no, ct_tax_amount');     sql.add('inspect_date, record_date');     sql.add('values (:record_type, :plate_group, :plate_no, :v_type, :v_type_cn, :v_type_pt, :v_type_pt,');     sql.add(':v_brand, :engine_no, :ct_tax_amount,');     sql.add(':inspect_date, :record_date');   end;   := 0;   assignfile(f,edmastername.text);   reset(f);   while not eof(f)   begin     readln(f,s);     inc(i);   end;   prinsert.max := i;   := 0;   reset(f);   vrs_main.statusbar1.panels[5].text:='0';   while not eof(f)   begin     inc(i);     prinsert.stepit;     readln(f,s);     quinsert.parameters.parambyname('record_type').value := copy(s,1,1);     quinsert.parameters.parambyname('plate_group').value := copy(s,2,1);     quinsert.parameters.parambyname('plate_no').value := copy(s,3,8);     quinsert.parameters.parambyname('v_type').value := copy(s,11,1);     quinsert.parameters.parambyname('v_type_cn').value := utf8decode(copy(s,12,50));     quinsert.parameters.parambyname('v_type_pt').value := copy(s,62,50);     quinsert.parameters.parambyname('v_brand').value := copy(s,112,30);     quinsert.parameters.parambyname('engine_no').value := copy(s,142,50);     quinsert.parameters.parambyname('ct_tax_amount').value := copy(s,192,9);     quinsert.parameters.parambyname('inspect_date').value := copy(s,201,50);     quinsert.parameters.parambyname('record_date').value := copy(s,251,8);     quinsert.execsql;     vrs_main.statusbar1.panels[5].text:=inttostr(strtoint(vrs_main.statusbar1.panels[5].text)+1);   end; end;

image

store utf-8 data in utf8string instead of standard string, , call either utf8decode() or utf8toansi() , store result in database.





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