我有一个带输入验证的DataGrid，如果它包含验证错误，我想禁用一个按钮。我使用以下代码检查此类错误：
${CATALINA_BASE}/work 问题是编辑后， private void sequenceGrid_LostFocus(object sender, RoutedEventArgs e)
{
// This method is called on any click outside the current cell
((DataGrid)sender).UnselectAllCells();
if (HasError(((DataGrid)sender)))
{
((dynamic)DataContext).DatagridsValidated = false;
}
else
{
((dynamic)DataContext).DatagridsValidated = true;
}
}
private bool HasError(DataGrid dg)
{
/*bool errors = (from c in
(from object i in dg.ItemsSource
select dg.ItemContainerGenerator.ContainerFromItem(i))
where c != null
select Validation.GetHasError(c)).FirstOrDefault(x => x);
return errors;
*/
for (int i = 0; i < dg.Items.Count; i++)
{
DataGridRow row = GetRow(dg, i);
if (row != null && Validation.GetHasError(row))
{
return true;
}
}
return false;
}
public static DataGridRow GetRow(DataGrid grid, int index)
{
DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
if (row == null)
{
// May be virtualized, bring into view and try again.
grid.UpdateLayout();
grid.ScrollIntoView(grid.Items[index]);
row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
}
return row;
}
private void sequenceGrid1_MouseLeave(object sender, MouseEventArgs e)
{
PreviewMouseLeftButtonDown += mouseClick;
}
private void mouseClick(object sender, MouseEventArgs e)
{
HitTestResult hitTestResult;
hitTestResult = VisualTreeHelper.HitTest(sequenceGrid1, e.GetPosition(sequenceGrid1));
if (hitTestResult == null) // Click outside the datagrid
{
sequenceGrid1.CommitEdit(DataGridEditingUnit.Row, true);
try
{
sequenceGrid1.Items.Refresh();
}
catch { } // Edit mode still open if there is invalid input
}
PreviewMouseLeftButtonDown -= mouseClick;
}
会返回错误的值。例如，我需要在DataGrid中单击两次以获取此方法以返回正确的值。我提到注释的代码会给出相同的结果。
如何使Validation.GetHasError（）返回DataGrid的正确值？