// 数据视图与布局视图同步
private void mainMapControl_OnAfterScreenDraw(object sender, IMapControlEvents2_OnAfterScreenDrawEvent e)
{
IActiveView pActiveView = (IActiveView)mainPageLayoutControl1.ActiveView.FocusMap;
IDisplayTransformation displayTransformation = pActiveView.ScreenDisplay.DisplayTransformation;
displayTransformation.VisibleBounds = mainMapControl.Extent;
mainPageLayoutControl1.ActiveView.Refresh();
CopyToPageLayout(); // 调用下面的函数

}

// CopyToPageLayout() 布局视图与数据视图同步
private void CopyToPageLayout()
{
IObjectCopy pObjectCopy = new ObjectCopyClass();
object copyFromMap = mainMapControl.Map;
object copiedMap = pObjectCopy.Copy(copyFromMap); // 复制地图到copiedMap中
object copyToMap = mainPageLayoutControl1.ActiveView.FocusMap;
pObjectCopy.Overwrite(copiedMap, ref copyToMap); // 复制地图
mainPageLayoutControl1.ActiveView.Refresh();

}