How do I bind SQLDatasource from WeMethod

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C#

ASP.NET

SQL

WebMethod

Hello all . I have WebMethod in WebServis.asmx file in my project . Also i have asp.net page where i have textboxes where i input parameters for Query that will be datasource for Gridview .
I want to bind datasource to Gridview from WebMethod .
Can I make this or i need to use SqlDataReader to export data from my Query ?

I need something like this :

mkTabl.DataSource = SqlDataSource1;
mkTabl.DataBind();

Webmethod

[System.Web.Services.WebMethod]
public void CheckCat(string fam, string im , string ot )
{
  SqlDataSource SqlDataSource1 = new SqlDataSource();
  SqlDataSource1.ID = "SqlDataSource1";
  SqlDataSource1.ConnectionString =         System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
  SqlDataSource1.SelectCommand = "SELECT id , org, code FROM Tabl  where (@fam like Tabl.FAM ) or  (@im like Tabl.IM) or ( @ot like Tabl.OT) " ;
  SqlDataSource1.SelectParameters.Add("@fam", fam);
  SqlDataSource1.SelectParameters.Add("@im", im);
  SqlDataSource1.SelectParameters.Add("@ot", ot);

<asp:TextBox ID="FamBox" runat="server" MaxLength="10" /> 
<asp:TextBox ID="ImBox" runat="server" MaxLength="10" /> 
<asp:TextBox ID="OtBox" runat="server" MaxLength="14" />
    <asp:GridView ID="mkTabl" Visible="true"  CssClass="ts1" runat="server" AutoGenerateColumns="False"  PageSize="5" AllowPaging="True" AutoPostBack="True"  >
 </asp:GridView>