Why does the DataGrid only display the header and not any content?

[kyuranger]

I want to add data to a DataGrid using a DataTable because my data doesn't have a fixed model, so I have to add it column by column using code.

Here is XAML:

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="AvaloniaApplication1.MainWindow"
        Title="AvaloniaApplication1">
    <DataGrid Name="PART_DataGrid">
		
    </DataGrid>
</Window>

Here is code-behind:

using Avalonia.Controls;
using Avalonia.Data;
using Avalonia.Interactivity;
using Avalonia.Media.TextFormatting;
using Avalonia.Threading;
using System.Data;
using System.Threading.Tasks;

namespace AvaloniaApplication1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();         
        }
        protected override void OnLoaded(RoutedEventArgs e)
        {
            base.OnLoaded(e);
            DataTable _dataTable = new DataTable();
            _dataTable.Columns.Add($"G", typeof(string));

            var _row = _dataTable.NewRow();
            _row[$"G"] = "123";
            _dataTable.Rows.Add(_row);

            PART_DataGrid.Columns.Clear();
            PART_DataGrid.Columns.Add(new DataGridTextColumn()
            {
                Header = "G",
                Binding = new Binding("G")
            });
            PART_DataGrid.ItemsSource = _dataTable.DefaultView;
        }
    }
}

However, it doesn't render any. What's wrong with my code?

[kyuranger]

I found a solution here:
#13238

Modify my backend code as follows:

using Avalonia.Controls;
using Avalonia.Data;
using Avalonia.Interactivity;
using Avalonia.Media.TextFormatting;
using Avalonia.Threading;
using System.Data;
using System.Threading.Tasks;

namespace AvaloniaApplication1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        protected override void OnLoaded(RoutedEventArgs e)
        {
            base.OnLoaded(e);
            DataTable _dataTable = new DataTable();
            _dataTable.Columns.Add($"G", typeof(string));

            var _row = _dataTable.NewRow();
            _row[$"G"] = "123";
            _dataTable.Rows.Add(_row);

            PART_DataGrid.Columns.Clear();
            foreach (var i in _dataTable.Columns)
            {
                if (i is System.Data.DataColumn _column)
                {
                    PART_DataGrid.Columns.Add(new DataGridTextColumn()
                    {
                        Header = "G",
                        Binding = new Binding($"Row.ItemArray[{_column.Ordinal}]")
                    });
                }
            }
            PART_DataGrid.ItemsSource = _dataTable.DefaultView;
        }
    }
}

It works now.

[rabbitism]

Because there is no direct support of displaying datatable with datagrid.