我在WPF中有一个DataGrid
。
我想在我按Enter键时移到NextCell,并且在到达LastColumn时,它应该具有创建或移至下一行的默认Enter函数。
我不想使用Tab
我如何在WPF中做到这一点。
最佳答案
试试看,我认为它至少对我有用。
//datagrid gotfocus event
private void dataGrid1_GotFocus(object sender, RoutedEventArgs e)
{
DependencyObject dep = (DependencyObject)e.OriginalSource;
//here we just find the cell got focused ...
//then we can use the cell key down or key up
// iteratively traverse the visual tree
while ((dep != null) && !(dep is DataGridCell) && !(dep is DataGridColumnHeader))
{
dep = VisualTreeHelper.GetParent(dep);
}
if (dep == null)
return;
if (dep is DataGridCell)
{
DataGridCell cell = dep as DataGridCell;
//raise key down event of cell
cell.IsSelected = true;
cell.KeyDown += new KeyEventHandler(cell_KeyDown);
}
}
void cell_KeyDown(object sender, KeyEventArgs e)
{
DataGridCell cell = sender as DataGridCell;
if (e.Key == Key.Enter)
{
cell.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
cell.IsSelected = false;
e.Handled = true;
cell.KeyDown -= cell_KeyDown;
}
}
在此代码中,当一个单元格获得焦点时,下一个单元格上的用户键将获得焦点。
祝您好运,希望对您有所帮助。
编辑 :
将此函数设置为datagrid PreviewKeyDown事件。
private void maindg_PreviewKeyDown(object sender, KeyEventArgs e)
{
//just accept enter key
if (e.Key != Key.Enter) return;
DependencyObject dep = (DependencyObject)e.OriginalSource;
//here we just find the cell got focused ...
//then we can use the cell key down or key up
// iteratively traverse the visual tree
while ((dep != null) && !(dep is DataGridCell) && !(dep is DataGridColumnHeader))
{
dep = VisualTreeHelper.GetParent(dep);
}
if (dep == null)
return;
if (dep is DataGridCell)
{
//cancel if datagrid in edit mode
maindg.CancelEdit();
//get current cell
DataGridCell cell = dep as DataGridCell;
//deselect current cell
cell.IsSelected = false;
//find next right cell
var nextCell = cell.PredictFocus(FocusNavigationDirection.Right);
//if next right cell null go for find next ro first cell
if (nextCell == null)
{
DependencyObject nextRowCell;
nextRowCell = cell.PredictFocus(FocusNavigationDirection.Down);
//if next row is null so we have no more row Return;
if (nextRowCell == null) return;
//we do this because we cant use FocusNavigationDirection.Next for function PredictFocus
//so we have to find it this way
while ((nextRowCell as DataGridCell).PredictFocus(FocusNavigationDirection.Left) != null)
nextRowCell = (nextRowCell as DataGridCell).PredictFocus(FocusNavigationDirection.Left);
//set new cell as next cell
nextCell = nextRowCell;
}
//change current cell
maindg.CurrentCell = new DataGridCellInfo(nextCell as DataGridCell);
//change selected cell
(nextCell as DataGridCell).IsSelected = true;
// start edit mode
maindg.BeginEdit();
}
//handl the default action of keydown
e.Handled = true;
}