Provided that "lineEdit_recordid" was placed in Designer, it's a private member of myForm. You could do it for example like this:
Qt Code:
  1. class myForm
  2. {
  3. ...
  4. public:
  5. void setRecordId(const QString& id);
  6. ...
  7. };
  8.  
  9. void myForm::setRecordId(const QString& id)
  10. {
  11. lineEdit_recordid->setText(id);
  12. // or
  13. // ui.lineEdit_recordid->setText(id);
  14. }
  15.  
  16. // usage:
  17. dialog2->setRecordId("315");
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