Merge pull request #3 from Anandh-SF4665/master

Updated README.md file

Author: PiruthivirajM

README.md

@@ -1,2 +1,69 @@
 # xamarin-forms-listview-custom-sorting
 Xamarin Forms ListView provides support to custom sort the items using Comparer.
+
+## Sample
+
+```xaml
+<sync:SfListView x:Name="listView"
+                    ItemSize="70" 
+                    FocusBorderThickness="0"
+                    SelectionBackgroundColor="#ECECEC" IsScrollBarVisible="False"
+                    ItemsSource="{Binding ContactsInfo}">
+    
+    <sync:SfListView.DataSource>
+        <dataSource:DataSource>
+            <dataSource:DataSource.SortDescriptors>
+                <dataSource:SortDescriptor>
+                    <dataSource:SortDescriptor.Comparer>
+                        <local:CustomSortComparer/>
+                    </dataSource:SortDescriptor.Comparer>
+                </dataSource:SortDescriptor>
+            </dataSource:DataSource.SortDescriptors>
+        </dataSource:DataSource>
+    </sync:SfListView.DataSource>
+    
+    <sync:SfListView.ItemTemplate>
+        <DataTemplate>
+            <ViewCell>
+                <ViewCell.View>
+                    <code>
+                    . . .
+                    . . .
+                    <code>
+                </ViewCell.View>
+            </ViewCell>
+        </DataTemplate>
+    </sync:SfListView.ItemTemplate>
+</sync:SfListView>
+
+CustomSortComparer:
+public class CustomSortComparer : IComparer<object>
+{
+    public int Compare(object x, object y)
+    {
+        if (x.GetType() == typeof(ListViewContactsInfo))
+        {
+            var xitem = (x as ListViewContactsInfo).ContactName;
+            var yitem = (y as ListViewContactsInfo).ContactName;
+
+            if (xitem.Length > yitem.Length)
+            {
+                return 1;
+            }
+            else if (xitem.Length < yitem.Length)
+            {
+                return -1;
+            }
+            else
+            {
+                if (string.Compare(xitem, yitem) == -1)
+                    return -1;
+                else if (string.Compare(xitem, yitem) == 1)
+                    return 1;
+            }
+        }
+
+        return 0;
+    }
+}
+```