Dynamic loading data to Form/Widget from DataBase

Is there any Controls to show tables/trees from DB on-line? I mean without l开发者_开发百科oading all data into application. At the moment any table/tree control can present no more than 50-100 items. Why i need to wait all data to be loaded? Where can i find more information about async loading data to table/tree widget from DB.

I am interested in such control in .NET and widget in Qt.

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In Qt, QSqlQueryModel, QSqlTableModel and QSqlRelationalTableModel can load data from a database with minor configuration, you can then use these in a QTableView to show that loaded data