Merge new-kb-chart-display-empty-69ccb76854994efc96c3d6acabc8e054-2699 into production (#2708)

* Added new kb article chart-display-empty

* chore: kb polish

* chore: update kb title and add link in docs

* apply suggested changes and polish example

* chore: polish kb article

---------

Co-authored-by: KB Bot <kb-bot@telerik.com>
Co-authored-by: Tsvetomir Hristov <106250052+Tsvetomir-Hr@users.noreply.github.com>

Author: 3 people

components/chart/templates.md

@@ -85,4 +85,5 @@ Starting in **version 7.0.0**, when all Chart series have no data to show, a def
 ## See Also
 
  * [Live Demo: Chart - No Data Template](https://demos.telerik.com/blazor-ui/chart/no-data-template)
+ * [How to Show Empty Chart Instead the Default No Data Template](slug:// chart-kb-display-empty-chart)
 

knowledge-base/chart-display-empty.md

@@ -0,0 +1,99 @@
+---
+title: How to Show Empty Chart Instead of the Default No Data Template
+description: Learn how to show an empty Chart component when there is no data, instead of displaying the default No Data template.
+type: how-to
+page_title: How to Show Empty Chart Instead of the Default No Data Template
+slug: chart-kb-display-empty-chart
+tags: charts, blazor, no data template, empty chart
+res_type: kb
+ticketid: 1675313
+---
+
+## Environment
+<table>
+	<tbody>
+		<tr>
+			<td>Product</td>
+			<td>Chart for Blazor</td>
+		</tr>
+	</tbody>
+</table>
+
+## Description
+
+As of version 7.1.0 of Telerik UI for Blazor, the [No Data Template](slug://chart-no-data-template) was introduced for Charts in Blazor. In some scenarios, displaying an empty Chart, rather than the No Data template, is preferred when there is no data.
+
+## Solution
+
+To display an empty Chart when there is no data, [override the default theme styles](slug://themes-override) with custom CSS. The following example demonstrates how to achieve an empty Chart display by hiding the No Data Template overlay through CSS.
+
+````RAZOR
+<TelerikButton OnClick="@UpdateData">@ButtonContent</TelerikButton>
+<br />
+<TelerikChart @ref="ChartRef" Width="800px" Height="400px">
+    <ChartSeriesItems>
+        <ChartSeries Type="ChartSeriesType.Column"
+                     Data="@ChartData"
+                     Name="Product Sales"
+                     Field="@nameof(ChartSeriesData.ProductSales)"
+                     CategoryField="@nameof(ChartSeriesData.Year)">
+        </ChartSeries>
+    </ChartSeriesItems>
+</TelerikChart>
+
+<style>
+    .k-chart-overlay {
+        display: none;
+    }
+</style>
+
+@code {
+    private const string Add = "Add Data";
+    private const string Remove = "Remove Data";
+
+    private TelerikChart ChartRef { get; set; }
+    private List<ChartSeriesData> ChartData { get; set; } = new ();
+    private string ButtonContent { get; set; } = Add;
+
+    private void UpdateData()
+    {
+        if (ChartData == null || ChartData?.Count() == 0)
+        {
+            ChartData = ChartSeriesData.GenerateData();
+            ButtonContent = Remove;
+        }
+        else
+        {
+            // Clear the data
+            ChartData = new List<ChartSeriesData>();
+            ButtonContent = Add;
+        }
+        ChartRef.Refresh(); // Refresh the Chart
+    }
+
+    public class ChartSeriesData
+    {
+        public int ProductSales { get; set; }
+        public int Year { get; set; }
+
+        public static List<ChartSeriesData> GenerateData()
+        {
+            List<ChartSeriesData> data = new List<ChartSeriesData>
+            {
+                new ChartSeriesData { ProductSales = 120, Year = 2020 },
+                new ChartSeriesData { ProductSales = 180, Year = 2021 },
+                new ChartSeriesData { ProductSales = 150, Year = 2022 },
+                new ChartSeriesData { ProductSales = 210, Year = 2023 },
+                new ChartSeriesData { ProductSales = 90,  Year = 2024 }
+            };
+
+            return data;
+        }
+    }
+}
+````
+
+## See Also
+
+- [Blazor Charts Overview](slug://components/chart/overview)
+- [Override Theme Styles](slug://themes-override)