DataGrid 顯示選中的item · WPF編程之路

Datagrid或者listview 中想要把相應的項滾動到當前可見的位置，必須滿足2個條件： 1）必須去掉虛擬化 ? ?VirtualizingStackPanel.IsVirtualizing="False" 2）調用ScrollToView ? ??//Bring current selected item to view ??????????if(null!=grdStudyList.SelectedItem&& 0 !=grdStudyList.Columns.Count) ?????????? { ??????????????//first focus the grid ??????????????grdStudyList.Focus(); ??????????????//then create a new cell info, with the item we wish to edit and the column number of the cell we want in edit mode ??????????????DataGridCellInfocellInfo=newDataGridCellInfo(grdStudyList.SelectedItem,grdStudyList.Columns[0]); ??????????????//set the cell to be the active one ??????????????grdStudyList.CurrentCell=cellInfo; ??????????????//scroll the item into view ??????????????grdStudyList.ScrollIntoView(grdStudyList.SelectedItem);???? ?????????? } ? ? ? ?? 3)如果不去掉虛擬化，?VirtualizingStackPanel.IsVirtualizing?="True" 則，調用如下語句： ?privatevoidScrollItemInSelector(Selectordtg,objectneedScrollItem) ?????? { ??????????//Bring current selected item to view ??????????if(null==dtg&&null!=needScrollItem) ?????????? { ??????????????//first focus the grid ??????????????dtg.Focus(); ??????????????dtg.SelectedItem=needScrollItem; ??????????????dtg.Items.MoveCurrentTo(needScrollItem); ??????????????ScrollViewerscv=FindVisualChild<ScrollViewer>(dtg); ??????????????if(null!=scv ?????????????????? && (dtg.Items.CurrentPosition<scv.VerticalOffset-scv.ViewportHeight||dtg.Items.CurrentPosition>scv.VerticalOffset+scv.ViewportHeight) ?????????????????? ) ?????????????? { ??????????????????scv.ScrollToVerticalOffset(dtg.Items.CurrentPosition); ?????????????? } ?????????? } ?????? } ?