Question

Table is created, but rows are empty, why?

MySqlConnection conn = new MySqlConnection("...");
conn.Open();
MySqlCommand cmd = new MySqlCommand("select id,id_user,status,id_delivery_method,delivery_method,id_payment_method,payment_method,payment_info,user_name,user_phone from `request`", conn);
DataTable dt = new DataTable();
dt.Load(cmd.ExecuteReader());
dataGrid1.ItemsSource = dt.DefaultView;

Answer 1

Try to set AutoGenerateColums = false and define the columns by yourself:

in XAML:

<DataGrid ... AutoGenerateColums="false">
    <DataGrid.Columns><!-- Your columns --></DataGrid.Columns>
</DataGrid>

in Code-behind:

yourDatagrid.AutoGenerateColumns = false;