private static void DataGridLoaded(DataGrid dataGrid)
{
if (VisualTreeHelperEx.FindChildren <ScrollViewer>(dataGrid).FirstOrDefault() is ScrollViewer scrollViewer)
{
SetSenderDataGrid(scrollViewer, dataGrid);
scrollViewer.ScrollChanged += ScrollViewerOnScrollChanged;
}
}
private static void ScrollViewerOnScrollChanged(object sender, ScrollChangedEventArgs e)
{
if (sender is ScrollViewer scrollViewer)
{
if (VisualTreeHelperEx.FindChildren <ScrollBar>(scrollViewer).FirstOrDefault(s => s.Orientation == Orientation.Vertical) is ScrollBar verticalScrollBar)
{
DataGrid dataGrid = GetSenderDataGrid(scrollViewer);
int totalCount = dataGrid.Items.Count;
int firstVisible = (int)verticalScrollBar.Value;
int lastVisible = (int)(firstVisible + totalCount - verticalScrollBar.Maximum);
SetVisibleItems(dataGrid, GetVisibibleItems(firstVisible, lastVisible, dataGrid).ToArray());
}
}
