使用 QueryDataSet + jdbTable　编写了一个简单的数据库访问程序，可以读取数据显示到jdbTable上了，也可以在jdbTable上编辑修改数据，可是一按jdbNavToolBar上的save change键，就会弹出出错窗口，Stack Trace如下： 

See com.borland.dx.sql.dataset.ResolutionException error code:  BASE+3 

com.borland.dx.sql.dataset.ResolutionException: An error occurred saving a change to the "product" table 

at com.borland.dx.sql.dataset.ResolutionException.a(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionException.c(Unknown Source) 

at com.borland.dx.sql.dataset.l.a(Unknown Source) 

at com.borland.dx.sql.dataset.QueryResolver.updateRow(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.a(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.e(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.e(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.saveChanges(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.saveChanges(Unknown Source) 

at com.borland.dx.sql.dataset.Database.saveChanges(Unknown Source) 

at com.borland.dx.sql.dataset.QueryDataSet.saveChanges(Unknown Source) 

at com.borland.dx.dataset.DataSet.saveChanges(Unknown Source) 

at com.borland.dbswing.JdbNavToolBar.actionPerformed(JdbNavToolBar.java:1799) 

at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1445) 

at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1499) 

at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:373) 

at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:245) 

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:211) 

at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:225) 

at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:225) 

at java.awt.Component.processMouseEvent(Component.java:3710) 

at java.awt.Component.processEvent(Component.java:3539) 

at java.awt.Container.processEvent(Container.java:1159) 

at java.awt.Component.dispatchEventImpl(Component.java:2588) 

at java.awt.Container.dispatchEventImpl(Container.java:1208) 

at java.awt.Component.dispatchEvent(Component.java:2492) 

at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2446) 

at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2211) 

at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2120) 

at java.awt.Container.dispatchEventImpl(Container.java:1195) 

at java.awt.Window.dispatchEventImpl(Window.java:921) 

at java.awt.Component.dispatchEvent(Component.java:2492) 

at java.awt.EventQueue.dispatchEvent(EventQueue.java:334) 

at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:126) 

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:93) 

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88) 

at java.awt.EventDispatchThread.run(EventDispatchThread.java:80) 

Chained exception: 

java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Value can not be converted to requested type. 

at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source) 

at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source) 

at com.microsoft.jdbc.base.BaseData.getBigDecimal(Unknown Source) 

at com.microsoft.jdbc.base.BaseData.getBigDecimal(Unknown Source) 

at com.microsoft.jdbc.base.BasePreparedStatement.setObjectInternal(Unknown Source) 

at com.microsoft.jdbc.base.BasePreparedStatement.setObject(Unknown Source) 

at com.borland.dx.sql.dataset.j.setParameter(Unknown Source) 

at com.borland.dx.sql.dataset.a.a(Unknown Source) 

at com.borland.dx.sql.dataset.l.a(Unknown Source) 

at com.borland.dx.sql.dataset.QueryResolver.updateRow(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.a(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.e(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.e(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.saveChanges(Unknown Source) 

at com.borland.dx.sql.dataset.ResolutionManager.saveChanges(Unknown Source) 

at com.borland.dx.sql.dataset.Database.saveChanges(Unknown Source) 

at com.borland.dx.sql.dataset.QueryDataSet.saveChanges(Unknown Source) 

at com.borland.dx.dataset.DataSet.saveChanges(Unknown Source) 

at com.borland.dbswing.JdbNavToolBar.actionPerformed(JdbNavToolBar.java:1799) 

at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1445) 

at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1499) 

at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:373) 

at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:245) 

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:211) 

at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:225) 

at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:225) 

at java.awt.Component.processMouseEvent(Component.java:3710) 

at java.awt.Component.processEvent(Component.java:3539) 

at java.awt.Container.processEvent(Container.java:1159) 

at java.awt.Component.dispatchEventImpl(Component.java:2588) 

at java.awt.Container.dispatchEventImpl(Container.java:1208) 

at java.awt.Component.dispatchEvent(Component.java:2492) 

at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2446) 

at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2211) 

at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2120) 

at java.awt.Container.dispatchEventImpl(Container.java:1195) 

at java.awt.Window.dispatchEventImpl(Window.java:921) 

at java.awt.Component.dispatchEvent(Component.java:2492) 

at java.awt.EventQueue.dispatchEvent(EventQueue.java:334) 

at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:126) 

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:93) 

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88) 

at java.awt.EventDispatchThread.run(EventDispatchThread.java:80) 


这是怎么回事呀？　谁可以救救我呀？？？？   :(( 

你的querydataset的sql是从一个表里取数据嘛？如果从多个表取数据可能会有问题