Retrieving specified fields from NAV tables using Web Servic

Hi everyone,

Using web services, I am displaying Customer (accessing NAV data) details in ASP.Net application using GridView control. Here problem is I don’t want to display all fields from Customer table. I can put filters on customer data. But, I am unable to retrieve specified fields from customer table.
Can anyone tell the solution for this issue?

protected void Button1_Click(object sender, EventArgs e)
    {
        CustWS.CustomerPage_Service CustServices = new CustomerPage_Service();
        CustServices.UseDefaultCredentials = true;
        CustServices.Url = "http://b2bxpprof247:7047/DynamicsNAV/WS/CRONUS_India_Ltd./Page/CustomerPage";
        CustWS.CustomerPage CustRec = new CustomerPage();

        List<CustomerPage_Filter> filterArray = new List<CustomerPage_Filter>();
        CustomerPage_Filter CustFilter = new CustomerPage_Filter();
        CustFilter.Field = CustomerPage_Fields.Name;
        CustFilter.Criteria = "@s*";
        filterArray.Add(CustFilter);
        GridView1.DataSource = CustServices.ReadMultiple(filterArray.ToArray(), null, 100);
        GridView1.DataBind();

    }