PowerArgs.Cli.Grid.Up C# (CSharp) Method

        public void Up()
        {
            if (SelectedIndex > 0)
            {
                SelectedIndex--;
            }

            if (SelectedIndex < visibleRowOffset)
            {
                visibleRowOffset--;
                this.query.Skip = visibleRowOffset;
                DataView = DataSource.GetDataView(query);
            }

            if (SelectedIndex - visibleRowOffset < DataView.Items.Count)
            {
                SelectedItem = DataView.Items[SelectedIndex - visibleRowOffset];
            }
        }