question

Hello,

Welcome to our Microsoft Q&A platform!

Using a DataTemplateSelector, we can determine at runtime which DataTemplate to apply to show items in a control for the GridView & ListView.
For how to implement it, please check the following steps:

1. First please create a custom DataTemplateSelector class that inherits from the DataTemplateSelector class.
   

2. Then implement the SelectTemplateCore(Object) method in the custom class and add the condition you used to decide which data template to use.
   

3. Create two Data Templates in Xaml and assign them to the data templates which defined in the custom DataTemplateSelector class.

Here is a simple demo:

Xaml code:

Code Behind:

 public sealed partial class MainPage: Page
     {
         public List sources { get; set; }
         public MainPage()
         {
             this.InitializeComponent();
             sources = new List();
             sources.Add("1");
             sources.Add("2");
             sources.Add("1");
             sources.Add("2");
             this.DataContext = this;
         }
     }
    
     public class MyDataTemplateSelector : DataTemplateSelector
     {
         public DataTemplate FirstTemplate { get; set; }
         public DataTemplate SecondTemplate { get; set; }
    
         protected override DataTemplate SelectTemplateCore(object item)
         {
             string str = item as string;
             if (str.Equals("1"))
                 return FirstTemplate;
             if (str.Equals("2"))
                 return SecondTemplate;
    
             return base.SelectTemplateCore(item);
         }
    
         protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
         {
             return SelectTemplateCore(item);
         }
 }

Thanks.