Xamarin.Forms为listview中的特定项显示不同的datatemplate

Question

I'm currently developing a dynamic app using Xamarin.Forms with .Net Standard. I am using MVVM as code pattern. No code behind the view.

The content of the view/page is a listview bound to a list of TemplateItem objects. Every listview item, TemplateItem , should look the same (as an article). But when the property BlockType of the TemplateItem is slideshow , the listview must look different by using another data template.

How can I use another data template for a listview item when a property of the object is different?

Here is my xaml:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:App1"
             x:Class="App1.MainPage"
             NavigationPage.HasBackButton="True"
             NavigationPage.HasNavigationBar="True"
             Title="Overview">

    <StackLayout >
        <ActivityIndicator IsRunning="{Binding IsBusy}"
                  HorizontalOptions="CenterAndExpand" IsVisible="{Binding IsBusy}"/>

        <ScrollView>
            <StackLayout>

                <ListView ItemsSource="{Binding LstTemplateList}" SeparatorVisibility="Default" HasUnevenRows="True">
                    <ListView.ItemTemplate>

                        <DataTemplate x:Name="DTArticle">
                            <ViewCell>
                                <StackLayout>
                                    <Label Text="{Binding Title}" FontSize="Large" />
                                    <TextCell Text="ArticleDescription"/>
                                </StackLayout>
                            </ViewCell>
                        </DataTemplate>
                        <DataTemplate x:Name="DTSlideShow">
                            <ViewCell>
                                <!-- another DT for a slideshow -->
                            </ViewCell>
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>
            </StackLayout>
        </ScrollView>
    </StackLayout>
</ContentPage>

Here is the model class:

public class TemplateItem
{
        public int Id { get; set; }
        public String BlockType { get; set; }

        public String Title { get; set; }
        public String ArticleDescription { get; set; }
        public List<String> LstImagePathsForSlideshow { get; set; }
}

Here is a wireframe to show you what I am trying to accomplish:

WireFrame of what I am trying to accomplish

Answer 1

Instead of using DataTemplate, try to use DataTemplateSelector. So that you can set different template for different objects. Reference Link : https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/templates/data-templates/selector