ListView Update Item Problem

HI

I use asp.net with c# and EF linq and sql

I have list view control with Insert and Delete and Update Method.

my insert and delete worked correctly but i can not update sql with EF code.

please tell me what is Code for Update Item.

<asp:ListView runat="server" ID="ListView1" DataKeyNames="Id" InsertItemPosition="LastItem"
      SelectMethod="ListView1_GetData"
      InsertMethod="ListView1_InsertItem"
      DeleteMethod="ListView1_DeleteItem"
      UpdateMethod="ListView1_UpdateItem" ><InsertItemTemplate><tr><td><asp:Label ID="Label1" runat="server" Text="نام شاخه"/></td><td><asp:TextBox ID="IName" runat="server" Width="200" Text='<%#Bind("Name") %>'/></td></tr><tr><td><asp:Label ID="Label2" runat="server" Text="ترتيب"/></td><td><asp:TextBox ID="SortOrder" runat="server" Width="100" Text='<%#Bind("SortOrder") %>'/></td></tr><tr><td style="border-bottom:1px solid black;"></td><td dir="ltr" style="border-bottom:1px solid black;" ><asp:Button ID="InsertButton" runat="server" Text="Insert" CommandName="Insert"/></td></tr></InsertItemTemplate><ItemTemplate><tr><td><asp:Label ID="Label1" runat="server" Text="نام شاخه"/></td><td><asp:TextBox ID="TName" runat="server" Width="200" Text='<%#Eval("Name") %>'/></td></tr><tr><td><asp:Label ID="Label2" runat="server" Text="ترتيب"/></td><td><asp:TextBox ID="SortOrder" runat="server" Width="100" Text='<%#Eval("SortOrder") %>'/></td></tr><tr><td style="border-bottom:1px solid black;"></td><td dir="ltr" style="border-bottom:1px solid black;"><asp:Button ID="DeleteButton" runat="server" Text="Delete" CommandName="Delete"/><asp:Button ID="UpdateButton" runat="server" Text="Update" CommandName="Update"  /></td></tr></ItemTemplate><LayoutTemplate><table runat="server" ><tr runat="server" id="itemPlaceholder" ></tr></table></LayoutTemplate></asp:ListView>

public void ListView1_UpdateItem(int id)
    {

        using (var myEntitie = new sbxEntities())
        {
            var genre = (from p in myEntitie.Genres
                         where p.Id == id
                         select p).Single();

            myEntitie.SaveChanges();
        }

    }