DataGrid: add SetLoading API (#5549)

* DataGrid | SetLoading

* Release notes

* Docs DataGridApi add SetLoading

* Public IsLoading

* fix paragraph

Documentation/Blazorise.Docs/Pages/Docs/Extensions/DataGrid/DataGridApi.razor

@@ -744,4 +744,8 @@
     <DocsMethodsItem Name="LoadState" ReturnType="Task" Parameters="DataGridState<TItem> dataGridState">
         Loads the state of the DataGrid.
     </DocsMethodsItem>
+    <DocsMethodsItem Name="SetLoading" ReturnType="void" Parameters="bool isLoading">
+        Sets the DataGrid into the loading state.
+        Makes sure to invoke the StateHasChanged method.
+    </DocsMethodsItem>
 </DocsMethods>

Documentation/Blazorise.Docs/Pages/News/2024-07-15-release-notes-160.razor

@@ -87,6 +87,10 @@
     </UnorderedListItem>
 </UnorderedList>
 
+<Paragraph>
+    Added a new <Code>SetLoading</Code> so you're able to control the loading state of the DataGrid.
+</Paragraph>
+
 <Heading>
     Wrap Up
 </Heading>

Source/Extensions/Blazorise.DataGrid/DataGrid.razor.cs

@@ -981,6 +981,17 @@ private async void OnPageChanged( int currentPage )
 
     #region Commands
 
+    /// <summary>
+    /// Sets the DataGrid into the loading state. 
+    /// <para>Makes sure to invoke the StateHasChanged method.</para>
+    /// </summary>
+    /// <param name="isLoading">Whether the grid is loading or not</param>
+    public void SetLoading(bool isLoading)
+    {
+        IsLoading = isLoading;
+        InvokeAsync(StateHasChanged);
+    }
+
     /// <summary>
     /// Sets the DataGrid into the New state mode.
     /// </summary>
@@ -2796,7 +2807,7 @@ internal bool IsGroupHeaderCaptionsEnabled
     /// <summary>
     /// Returns true if ReadData will be invoked.
     /// </summary>
-    protected bool IsLoading { get; set; }
+    public bool IsLoading { get; protected set; }
 
     /// <summary>
     /// Returns true if EmptyTemplate is set and Data is null or empty.