Update SelectionView sample

Author: enisn

sandbox/SandboxMAUI/Pages/SelectionViewPage.xaml

@@ -14,6 +14,14 @@
         <StackLayout Padding="25" Spacing="15">
             <Picker x:Name="picker" SelectedIndexChanged="Picker_SelectedIndexChanged" />
             <Picker x:Name="labelPositionPicker" SelectedIndexChanged="LabelPositionChanged" />
+            <Picker x:Name="columnNumberPicker" SelectedIndexChanged="ColumnNumberPicker_SelectedIndexChanged">
+                <Picker.Items>
+                    <x:String>1</x:String>
+                    <x:String>2</x:String>
+                    <x:String>3</x:String>
+                    <x:String>4</x:String>
+                </Picker.Items>
+            </Picker>
 
             <input:SelectionView
                  x:Name="selectionView"

sandbox/SandboxMAUI/Pages/SelectionViewPage.xaml.cs

@@ -10,8 +10,10 @@ public SelectionViewPage()
         picker.ItemsSource = Enum.GetValues(typeof(SelectionType));
         picker.SelectedItem = SelectionType.Button;
 
-        labelPositionPicker.SelectedItem = LabelPosition.Before;
         labelPositionPicker.ItemsSource = Enum.GetValues(typeof(LabelPosition));
+        labelPositionPicker.SelectedItem = LabelPosition.Before;
+
+        columnNumberPicker.SelectedItem = columnNumberPicker.Items.FirstOrDefault(x => x == "2");
     }
 
     private void Picker_SelectedIndexChanged(object sender, EventArgs e)
@@ -26,4 +28,12 @@ private void LabelPositionChanged(object sender, EventArgs e)
             selectionView.LabelPosition = (LabelPosition)pkr.SelectedItem;
         }
     }
+
+    private void ColumnNumberPicker_SelectedIndexChanged(object sender, EventArgs e)
+    {
+        if (sender is Picker picker)
+        {
+            selectionView.ColumnNumber = Convert.ToInt32(picker.SelectedItem);
+        }
+    }
 }