Xamarin.Forms show a different datatemplate for a specific item in listview

问题

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

回答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

来源：https://stackoverflow.com/questions/49348834/xamarin-forms-show-a-different-datatemplate-for-a-specific-item-in-listview

标签

Xamarin

xamarin.forms

datatemplate

.net-standard