978014 Event added for SfComboBox

winui/ComboBox/Searching.md

@@ -99,6 +99,32 @@ The `ComboBox` control provides support to auto append the text based on data so
 
 N> Auto appending of text is supported only in `Editable` mode and `TextSearchMode` property should be `StartsWith`.
 
+## Diacritic aware search
+
+The `IgnoreDiacritic` option allows string comparison and search operations to treat characters with diacritical marks as equivalent to their base characters. This is useful for search indexing, and user-friendly matching across languages. By default, Diacritic is not considered. Enable or disable the diacritic sensitivity using the `IgnoreDiacritic` property. The following code example demonstrates how to enable the diacritic sensitivity.
+
+{% tabs %}
+{% highlight xaml %}
+
+<editors:SfComboBox x:Name="comboBox"
+                    Width="250"
+                    IsEditable="true"
+                    ItemsSource="{Binding SocialMedias}"
+                    TextMemberPath="Name"
+                    DisplayMemberPath="Name"
+                    IgnoreDiacritic = "false" />
+
+{% endhighlight %}
+
+{% highlight C# %}
+
+comboBox.IgnoreDiacritic = "false";
+
+{% endhighlight %}
+{% endtabs %}
+
+![WinUI ComboBox search the items based on Diacritic word/char in the edit field](Searching_images/winui-combobox-diacriticimage.png)
+
 ## Search Mode
 
 The `TextSearchMode` property of the `ComboBox` can be used to regulate how the control behaves when it receives user input. The default text searching type is `StartsWith`, ignoring accent and it is case insensitive. The available text search modes are,

winui/ComboBox/Selection.md

@@ -325,3 +325,38 @@ private async  void OnComboBoxSelectionChanged(object sender, ComboBoxSelectionC
 {% endtabs %}
 
 ![WinUI ComboBox selection change notification](Selection_images/winui-combobox-selection-change-notification.png)
+
+## Selection changing notification
+
+The `SelectionChanging` event occurs before processing the selection. This is a cancelable event. This argument contains the following information:
+
+ * `AddedItems` - Contains the items that are being selected.
+ * `RemovedItems` - Contains the items that are being unselected.
+ * `AllowDetachedSelection` - Gets or sets a value indicating whether the not in list item should be displayed or not.
+ * `Cancel` - Gets or sets a value that indicates whether the selection should be canceled or not.
+
+ {% tabs %}
+
+ {% highlight xaml %}
+
+<editors:SfComboBox x:Name="comboBox"
+                    Width="250"
+                    TextMemberPath="Name"
+                    DisplayMemberPath="Name"
+                    ItemsSource="{Binding SocialMedias}"
+                    SelectionChanging="OnComboBoxSelectionChanging" />
+
+{% endhighlight %}
+
+{% highlight C# %}
+
+comboBox.SelectionChanging += OnComboBoxSelectionChanging;
+
+private void OnComboBoxSelectionChanging(object sender, Syncfusion.UI.Xaml.Editors.ComboBoxSelectionChangingEventArgs e)
+{
+    e.AllowDetachedSelection = true;
+}
+
+{% endhighlight %}
+
+ {% endtabs %}