How to dispay datagrid checkbox cheked unchecked both are in datagrid in WPF C#

try
           {
               DataRowView dataRowView = (DataRowView)((CheckBox)e.Source).DataContext;
               String ProductName = dataRowView[1].ToString();
               String ProductDescription = dataRowView[2].ToString();
               Assignid = dataRowView[0].ToString();
               menu_id = dataRowView[1].ToString();
               mod_id = dataRowView[2].ToString();
               name = dataRowView[3].ToString();
               if ((sender as CheckBox).IsChecked == true)
               {
                   Assign = "True";
                   DataSet load_am = Globalvariables.Globals.select("Select * from modifier_assign where ma_id = '"+ Assignid +"' and modifier_id = '" + mod_id + "' and menu_id = '"+ menu_id + "'");
                   if (load_am.Tables[0].Rows.Count > 0)
                   {
                       con.Open();
                       SqlCommand cmd = new SqlCommand("load_ma", con);
                       cmd.CommandType = CommandType.StoredProcedure;
                       cmd.Parameters.AddWithValue("@ma_id", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(Assignid) ? DBNull.Value : (object)Assignid;
                       cmd.Parameters.AddWithValue("@modifier_id", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(mod_id) ? DBNull.Value : (object)mod_id;
                       cmd.Parameters.AddWithValue("@menu_id", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(menu_id) ? DBNull.Value : (object)menu_id;
                       cmd.Parameters.AddWithValue("@modifiername", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(name) ? DBNull.Value : (object)name;
                       cmd.Parameters.AddWithValue("@assign", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(Assign) ? DBNull.Value : (object)Assign;
                       cmd.ExecuteNonQuery();
                       con.Close();
                   }
                   else
                   {
                       con.Open();
                       SqlCommand cmd = new SqlCommand("Insert into modifier_assign(modifier_id,menu_id,modifiername,assign) values('" + mod_id + "','" + menu_id + "','" + name + "','" + Assign + "')", con);
                       cmd.ExecuteNonQuery();
                       con.Close();
                   }
               }
               else
               {
                   Assign = "False";
                   con.Open();
                   SqlCommand cmd = new SqlCommand("load_ma", con);
                   cmd.CommandType = CommandType.StoredProcedure;
                   cmd.Parameters.AddWithValue("@ma_id", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(Assignid) ? DBNull.Value : (object)Assignid;
                   cmd.Parameters.AddWithValue("@modifier_id", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(mod_id) ? DBNull.Value : (object)mod_id;
                   cmd.Parameters.AddWithValue("@menu_id", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(menu_id) ? DBNull.Value : (object)menu_id;
                   cmd.Parameters.AddWithValue("@modifiername", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(name) ? DBNull.Value : (object)name;
                   cmd.Parameters.AddWithValue("@assign", SqlDbType.Int).Value = string.IsNullOrWhiteSpace(Assign) ? DBNull.Value : (object)Assign;
                   cmd.ExecuteNonQuery();
                   con.Close();
                               }

           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }

private void binddatagrid()
        {
            value = New_AFM.id;
            edit_val = New_AFM.edit;
            if (edit_val == 1)
            {
                
                DataSet load_am = Globalvariables.Globals.select("Select ma.ma_id,afm.menu_id,am.modifier_id as modifier_id,am.modifiername as modifiername from add_modifier am, add_food_menu afm,modifier_assign ma where afm.menu_id =  '" + value + "'");
                if (load_am != null && load_am.Tables[0].Rows.Count > 0)
                {
                    dataGrid.ItemsSource = load_am.Tables[0].DefaultView;
                    con.Close();
                }
            }