I Am Getting Null Data Grid, When I Bind With Datatable In Wpf Application

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C#

When I bind datagrid in wpf with of linq lambda expression its fill datagrid but when I try to convert this linq result in datatable then its fill null datagrid below my code which I tried ....

var join = dm.Export_Matrilas_s
             .Where(rh => rh.Material_type == 5)
             .Join(dm.Parti_Infos, p => p.Parti_Id, w => w.Parti_Id, (p, w) => new { p.Export_Matrilas_id, p.Material_type, p.Owncom, w.Organization, p.Date })
             .Join(dm.Own_Company_Infos, r => r.Owncom, y => y.Company_Id, (r, y) => new { r, y.Organization_Name })
             .Join(dm.Material_Types, n => n.r.Material_type, b => b.Id, (n, t) => new { n.r.Export_Matrilas_id, t.Meterial_Name, n.Organization_Name, n.r.Organization, n.r.Date })
             .ToList();

DataTable gettbl = ToDataTable(join);
mygride.DataContext = gettbl.DefaultView;

Here I convert into datatable using method

public DataTable ToDataTable<T>(IList<T> data)// T is any generic type
  {
      PropertyDescriptorCollection props = TypeDescriptor.GetProperties(typeof(T));

      DataTable table = new DataTable();
      for (int i = 0; i < props.Count; i++)
      {
          PropertyDescriptor prop = props[i];
          // table.Columns.Add(prop.DisplayName,prop.PropertyType);
          table.Columns.Add(prop.DisplayName, Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
      }
      object[] values = new object[props.Count];
       DataRow row;

      foreach (var record in data)
      {
          row = table.NewRow();
          for (int i = 0; i < table.Columns.Count; i++)
          {
              values[i] = props[i].GetValue(record) != null ? props[i].GetValue(record) : DBNull.Value;
          }

          table.Rows.Add(row);
      }

      table.Rows.Add(values);

      return table;
  }

Here is my xaml code:

<UserControl x:Class="Iqbal_Silks.Export_Tanee_Records"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             Height="700" Width="900">
    <UserControl.Resources>
        <ResourceDictionary Source="../Themes/Dictionary1.xaml"/>
    </UserControl.Resources>

    <Grid >
     <DataGrid x:Name="mygride" Margin="3,243,10,64" AutoGenerateColumns="False" AlternatingRowremoved="AliceBlue" VerticalContentAlignment="Center" CanUserResizeRows="False"   HorizontalContentAlignment="Center" ScrollViewer.PanningMode="VerticalFirst" IsReadOnly="True">
            <DataGrid.Columns>

                <DataGridTextColumn Header="Export ID" Width="Auto" Binding="{Binding Export_Matrilas_id}"/>
                <DataGridTextColumn Header="Materials " Width="Auto" Binding="{Binding Meterial_Name}" />
                <DataGridTextColumn Header="Company" Width="Auto" Binding="{Binding Organization_Name}"/>
                <DataGridTextColumn Header="Client" Width="Auto" Binding="{Binding Organization}"/>
                <DataGridTextColumn Header="Date" Width="Auto" Binding="{Binding Date}"/>

            </DataGrid.Columns>
        </DataGrid>
        <Button Content="Excel Records" x:Name="btnviewchallan_Copy"  Style="{StaticResource Hdrclose}" HorizontalAlignment="Left" Margin="616,641,0,0" VerticalAlignment="Top" Width="94" Height="27" Click="BtnviewchallanCopyClick" />

        <StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch" Margin="10,644,768,32">
            <Button Name="btnFirstPage" Content="<<" Click="btnFirstPage_Click"/>
            <Button Name="btnPreviousPage" Content="<" Click="btnPreviousPage_Click"/>
            <Label Name="lblPageIndex" Content="{Binding ElementName=root,
                Path=PageIndex, UpdateSourceTrigger=PropertyChanged}" Width="Auto"/>
            <Label Content="of"/>
            <Label Name="lblPageNumber" Content="{Binding ElementName=root,
                Path=NumberOfPages, UpdateSourceTrigger=PropertyChanged}" Width="Auto"/>
            <Button Name="btnNextPage" Content=">" Click="btnNextPage_Click"/>
            <Button Name="btnLastPage" Content=">>" Click="btnLastPage_Click"/>
        </StackPanel> 
</Grid>