LinkButton event is not firing in DataGrid

Question

Hi,

Below is the code the linkbutton is not firing the event.

 <asp:DataGrid ID="user_info" DataKeyField="c_id" runat="server" >

    <Columns>       

     <ItemTemplate>

        <asp:LinkButton ID="lnkbtn" CommandName="cmdview" OnCommand="lnkbtn_Command" runat="server" Text="View"  ></asp:LinkButton>

        </ItemTemplate>

    </Columns>       

   </asp:DataGrid>

 protected void lnkbtn_Command(Object sender, CommandEventArgs e)

    {

        if (e.CommandName == "cmdview")

        {

            Response.Redirect("http://google.com");

        }

    }

Please help me,
Thanks