+++++三层系统中调用applyupdate时，返回record changed by another user错误，怎样解决？+++++++

Question

不可能绝对避免的
把updatemode----keyonly
错误几率会很小的

Answer 1

1:在服务器端强行更新.
procedure Tchangedata.DataSetProvider1UpdateError(Sender: TObject;
  DataSet: TCustomClientDataSet; E: EUpdateError; UpdateKind: TUpdateKind;
  var Response: TResolverResponse);
begin
response:=rrapply;
end;
2;在客户端由用户决定:
procedure TForm1.ClientDataSet1ReconcileError(
  DataSet: TCustomClientDataSet; E: EReconcileError;
  UpdateKind: TUpdateKind; var Action: TReconcileAction);
begin
   showmessage('已有用户更新数据,请重新更新 ');
   action:=rarefresh;end;