how to set the item selection forcefully in Qt

Can any one tell me how to set the item to be selected forcefully..

I tried this after adding items to list row..

QModelIndex index = mylistview->currentIndex();
             mylistview ->setCurrentIndex(index开发者_开发技巧);

its not working.. index I am getting index (-1,-1).. can any one help me on this

Thanks

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Have you check the you have authorized selection? In the Qt Documentation, it is explain the item is selected unless selection mode is No Selection.