我已经通过将datagrid绑定到数据库列来成功显示数据，但问题是，在完全显示后，所有数据列都会重复出现，即(id, user_id,status,id, user_id,status,)。如何解决这个问题？这是我的代码：
<DataGrid x:Name="Grid_display" Grid.ColumnSpan="3" Margin="63,51,36,10" Grid.RowSpan="2">
<DataGrid.Columns>
<DataGridTextColumn Header="ID" Binding="{Binding Path=id}"/>
<DataGridTextColumn Header="Publisher ID" Binding="{Binding Path=user_id}"/>
<DataGridTextColumn Header="Publication Title" Binding="{Binding Path=title}"/>
<DataGridTextColumn Header="Published Date of Document" Binding="{Binding Path=published_date}"/>
<DataGridTextColumn Header="File" Binding="{Binding Path=file}"/>
<DataGridTextColumn Header="Status" Binding="{Binding Path=status}"/>
</DataGrid.Columns>
</DataGrid>
private void display_btn_Click(object sender, RoutedEventArgs e)
{
List<publication> q = (from p in db.publications where p.user_id == get_id select p).ToList();
Grid_display.ItemsSource = q;
}