Merge pull request #2 from Anandh-SF4665/main

Updated the README.md file

Author: PiruthivirajM

README.md

@@ -1,2 +1,67 @@
 # itemtemplate-selector-listview-xamarin
 ItemTemplateSelector listview xamarin
+
+## Sample
+
+```xaml
+<ContentPage.Resources>
+    <ResourceDictionary>
+        <local:MyDataTemplateSelector x:Key="MessageTemplateSelector"/>
+    </ResourceDictionary>
+</ContentPage.Resources>
+<Grid>
+    <sync:SfListView x:Name="ListView" 
+                        ItemTemplate="{StaticResource MessageTemplateSelector}" 
+                        ItemsSource="{Binding Messages}"
+                        ItemSize="105"
+                        SelectionMode="None"
+                        BackgroundColor="#FFFAF0"/>
+</Grid>
+
+Incoming Cell:
+<ViewCell xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="DataTemplateSelector.IncomingViewCell">
+        <code>
+        . . .
+        . . .
+        <code>
+</ViewCell>
+
+Outgoing cell:
+<ViewCell xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="DataTemplateSelector.OutgoingViewCell">
+        <code>
+        . . .
+        . . .
+        <code>
+</ViewCell>
+
+DataTemplateSelector:
+
+class MyDataTemplateSelector : Xamarin.Forms.DataTemplateSelector
+{
+    public DataTemplate IncomingDataTemplate { get; set; }
+    public DataTemplate OutgoingDataTemplate { get; set; }
+
+    public MyDataTemplateSelector()
+    {
+        this.incomingDataTemplate = new DataTemplate(typeof(IncomingViewCell));
+        this.outgoingDataTemplate = new DataTemplate(typeof(OutgoingViewCell));  
+    }
+
+    protected override DataTemplate OnSelectTemplate(object item, BindableObject container)
+    {
+        var messageVm = item as Message;
+        if (messageVm == null)
+            return null;
+        return messageVm.IsIncoming ? this.incomingDataTemplate : this.outgoingDataTemplate;
+    }
+
+    private readonly DataTemplate incomingDataTemplate;
+    private readonly DataTemplate outgoingDataTemplate;
+}
+```
+
+