Created parameter "SetSelected" to allow setting of selected items while using the grid in an edit context

Author: MarkKamberger

blazorbootstrap/Components/Grid/Grid.razor.cs

@@ -53,7 +53,7 @@ protected override async Task OnAfterRenderAsync(bool firstRender)
         {
             await RefreshDataAsync(firstRender);
             isFirstRenderComplete = true;
-        }
+        } 
 
         await base.OnAfterRenderAsync(firstRender);
     }
@@ -383,6 +383,7 @@ private async Task OnHeaderCheckboxChanged(ChangeEventArgs args)
         allItemsSelected = bool.TryParse(args?.Value?.ToString(), out var checkboxState) && checkboxState;
         selectedItems = allItemsSelected ? new HashSet<TItem>(items!) : new HashSet<TItem>();
         SelectedItemsCount = selectedItems.Count;
+        SetSelected = selectedItems;
         await CheckOrUnCheckAll();
 
         if (SelectedItemsChanged.HasDelegate)
@@ -456,8 +457,8 @@ private void PrepareCheckboxIds()
     private async Task RefreshSelectionAsync()
     {
         selectedItems = (items?.Count ?? 0) == 0
-                            ? new HashSet<TItem>()
-                            : selectedItems?.Intersect(items!).ToHashSet() ?? new HashSet<TItem>();
+            ? new HashSet<TItem>()
+            : selectedItems?.Intersect(items!).ToHashSet() ?? new HashSet<TItem>();
 
         SelectedItemsCount = selectedItems.Count;
         allItemsSelected = SelectedItemsCount > 0 && items!.Count == SelectedItemsCount;
@@ -584,6 +585,19 @@ private void SetFilters(IEnumerable<FilterItem> filterItems)
     [Parameter]
     public bool AllowRowClick { get; set; }
 
+    /// <summary>
+    /// Gets or sets the grid set selection.
+    /// </summary>
+    /// <remarks>
+    /// Default value is false.
+    /// </remarks>
+    [Parameter]
+    public HashSet<TItem> SetSelected
+    {
+        get => selectedItems;
+        set => selectedItems = value;
+    }
+
     /// <summary>
     /// Gets or sets the grid selection.
     /// </summary>