How to associate view with viewmodel or multiple DataTemplates for ViewModel?

Question

Given I have a GridView and I want to navigate to a different page by clicking each item.

How can navigate to a view associated to the viewmodel?

In WPF ther

Answer 1

In WPF, the DataType is a dependency property which can be retrieved in runtime.

In UWP, the x:DataType is compile-time property, you cannot get the value in runtime.

I created a simple demo about how to map the datatype and data template in UWP through DataTemplateSelector.

DataTemplateSelector:

namespace UWPApp
{
    public class Template
    {
        public string DataType { get; set; } 

        public DataTemplate DataTemplate { get; set; }
    }

    public class TemplateCollection2 : System.Collections.ObjectModel.Collection<Template>
    {
    }

    public class MyDataTemplateSelector : DataTemplateSelector
    {
        public TemplateCollection2 Templates { get; set; }

        private IList<Template> _templateCache { get; set; }

        public MyDataTemplateSelector()
        {

        }

        private void InitTemplateCollection()
        {
            _templateCache = Templates.ToList();
        }

        protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
        {
            if (_templateCache == null)
            {
                InitTemplateCollection();
            }

            if(item != null)
            {
                var dataType = item.GetType().ToString();

                var match = _templateCache.Where(m => m.DataType == dataType).FirstOrDefault();

                if(match != null)
                {
                    return match.DataTemplate;
                }
            }

            return base.SelectTemplateCore(item, container);
        }
    }
}

ViewModel:

namespace UWPApp
{
    public class ViewModel1
    {
        public string Text1 { get; set; }
    }

    public class ViewModel2
    {
        public string Text2 { get; set; }
    }
}

XAML:

<Grid 
    x:Name="container"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <Grid.Resources>
        <local:TemplateCollection2 x:Key="templates">
            <local:Template DataType="UWPApp.ViewModel1">
                <local:Template.DataTemplate>
                    <DataTemplate x:DataType="local:ViewModel1">
                        <StackPanel>
                            <TextBlock Text="{Binding Text1}"></TextBlock>
                            <TextBlock Text="From template1"></TextBlock>
                        </StackPanel>
                    </DataTemplate>
                </local:Template.DataTemplate>
            </local:Template>
            <local:Template DataType="UWPApp.ViewModel2">
                <local:Template.DataTemplate>
                    <DataTemplate x:DataType="local:ViewModel2">
                        <StackPanel>
                            <TextBlock Text="{Binding Text2}"></TextBlock>
                            <TextBlock Text="From template2"></TextBlock>
                        </StackPanel>
                    </DataTemplate>
                </local:Template.DataTemplate>
            </local:Template>
        </local:TemplateCollection2>
       <local:MyDataTemplateSelector 
        x:Key="myDataTemplateSelector" Templates="{StaticResource templates}">
       </local:MyDataTemplateSelector>
    </Grid.Resources>
    <StackPanel>
        <Button x:Name="button" Click="button_Click">Click Me</Button>
        <ContentControl x:Name="stage" ContentTemplateSelector="{StaticResource myDataTemplateSelector}">

        </ContentControl>
    </StackPanel>
</Grid>