DataTemplate x:Bind namespace error

Question

I have a question about Windows 10 UWP development using Visual Studio 2015.

I'm trying to use a DataTemplate for my GridView according to this tutorial. The problem I'm having is with my namespace.

I am not allowed to share my exact code for obvious reasons, but I'm wondering if one of you guys might have run into this before. I am getting almost the same error as this person (error code 0x09c4), except my DataTemplate is in my code-behind-file, not global like him/her. Along with that error I'm also getting the illusive "the _name does not exist in the namespace _namespace".

Here is a piece of my xaml file:

<Grid>
...
    <GridView ItemsSource="{x:Bind ViewModel.AssessExItems}">
        <GridView.ItemTemplate>
            <DataTemplate x:DataType="local:AssessExItem">

            </DataTemplate>
        </GridView.ItemTemplate>
    </GridView>
</Grid>

I know the DataTemplate is empty but even if I enter something there it still doesn't work. Here is my code-behind-file for this xaml file:

public sealed partial class AssessmentExample1Screen : Page
{
    public AssessExItemViewModel ViewModel { get; set; }

    public AssessmentExample1Screen()
    {
        this.InitializeComponent();
        this.ViewModel = new AssessExItemViewModel();
    }
}

public class AssessExItem
{
    public int _assessment_id { get; set; }
    public string name { get; set; }
    public string surname { get; set; }
    public string date { get; set; }

    //public EmpAssessItem() { }
}

public class AssessExItemViewModel
{
    private ObservableCollection<AssessExItem> exampleItems = new ObservableCollection<AssessExItem>();
    public ObservableCollection<AssessExItem> AssessExItems { get { return this.exampleItems; } }

    public AssessExItemViewModel()
    {
        //for (int i = 1; i < 3; i++)
        //{
        this.exampleItems.Add(new AssessExItem()
        {
            name = "Cat 777",
            surname = "Botha",
            date = "2015-03-22"
        });
        //}
        this.exampleItems.Add(new AssessExItem()
        {
            name = "XZR 678",
            surname = "Botha",
            date = "2015-03-22"
        });
        this.exampleItems.Add(new AssessExItem()
        {
            name = "TBL 123",
            surname = "Botha",
            date = "2015-03-22"
        });
    }
}

Please help.

Answer 1

I reproduced your problem. How to solve : Clean and build or rebuild the solution.And then I tested it,it works. I guess the most possible reason of why it happened is build can update the file mainpage.g.cs which determined where to find the datatype.

   <GridView ItemsSource="{x:Bind ViewModel.AssessExItems}">
        <GridView.ItemTemplate>
            <DataTemplate x:DataType="local:AssessExItem">
                <StackPanel Height="100" Width="100" Background="OrangeRed">
                    <TextBlock Text="{x:Bind name}"/>
                    <TextBlock Text="{x:Bind  surname}" x:Phase="1"/>
                    <TextBlock Text="{x:Bind date}" x:Phase="2"/>
                </StackPanel>
            </DataTemplate>
        </GridView.ItemTemplate>
    </GridView>