Optimization on when certain styling needs to be applied to a datagrid cell (#4178)

Author: vnbaaij

src/Core/Components/DataGrid/FluentDataGridCell.razor.cs

@@ -68,7 +68,7 @@ public partial class FluentDataGridCell<TGridItem> : FluentComponentBase
         .Build();
 
     protected string? StyleValue => new StyleBuilder(Style)
-        .AddStyle("grid-column", GridColumn.ToString(), () => !Grid.EffectiveLoadingValue && (Grid.Items is not null || Grid.ItemsProvider is not null) && Grid.DisplayMode == DataGridDisplayMode.Grid)
+        .AddStyle("grid-column", GridColumn.ToString(), () => !Grid.EffectiveLoadingValue && (Grid.Items is not null || Grid.ItemsProvider is not null) && InternalGridContext.TotalItemCount > 0 && Grid.DisplayMode == DataGridDisplayMode.Grid)
         .AddStyle("text-align", "center", Column is SelectColumn<TGridItem>)
         .AddStyle("align-content", "center", Column is SelectColumn<TGridItem>)
         .AddStyle("min-width", Column?.MinWidth, Owner.RowType is DataGridRowType.Header or DataGridRowType.StickyHeader)
@@ -77,7 +77,7 @@ public partial class FluentDataGridCell<TGridItem> : FluentComponentBase
         .AddStyle("padding-top", "calc(var(--design-unit) * 1.5px)", Column is SelectColumn<TGridItem> && Grid.RowSize == DataGridRowSize.Small && Owner.RowType == DataGridRowType.Default)
         .AddStyle("width", Column?.Width, !string.IsNullOrEmpty(Column?.Width) && Grid.DisplayMode == DataGridDisplayMode.Table)
         .AddStyle("height", $"{Grid.ItemSize:0}px", () => !Grid.EffectiveLoadingValue && Grid.Virtualize)
-        .AddStyle("height", $"{(int)Grid.RowSize}px", () => !Grid.EffectiveLoadingValue && !Grid.Virtualize && !Grid.MultiLine && (Grid.Items is not null || Grid.ItemsProvider is not null))
+        .AddStyle("height", $"{(int)Grid.RowSize}px", () => !Grid.EffectiveLoadingValue && !Grid.Virtualize && !Grid.MultiLine && (Grid.Items is not null || Grid.ItemsProvider is not null) && InternalGridContext.TotalItemCount > 0)
         .AddStyle("height", "100%", Grid.MultiLine)
         .AddStyle("min-height", "44px", Owner.RowType != DataGridRowType.Default)
         .AddStyle("z-index", ZIndex.DataGridHeaderPopup.ToString(), CellType == DataGridCellType.ColumnHeader && Grid._columns.Count > 0 && Grid.UseMenuService)