[DotNetDevelopment] XML file as Data Source for web service

[Brock]

I'm trying to develop a web service to expose an XML file for product
manufacturers for a client application to consume and populate a
datagrid on the consuming end.

I have successfully tested the web service with simple mathematic
returns like:

<%@ WebService Language="VB" Class="aWebService" %>
Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
<WebService(Namespace := "http://tempuri.org/";)> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
Public Class aWebService
    Inherits System.Web.Services.WebService

    <System.Web.Services.WebMethod()> _
Public Function SquareRootTimesSide(ByVal Diagonal As Double) _
    As Double
        Return (Diagonal * System.Math.Sqrt(2))
    End Function

End Class

So I thought I'd try exposing structured data. I use mostly XML files
for my datasources so I'd like to stick with that.

I have successfully implemented reading the XML file into a
local .aspx page with this code:

 <script runat="server">
    Private Function MakeDataView() as DataView
        Dim myDataSet As New DataSet()
        myDataSet.ReadXml(Server.MapPath("Manufacturers.xml"))
        Dim view As DataView = New DataView(myDataSet.Tables(0))
        view.AllowDelete = False
        view.AllowEdit = False
        view.AllowNew = False
        view.Sort = "name ASC"
        Return view
    End Function

    Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        Dim view as DataView = MakeDataView()
        dgManufacturers.DataSource = view
        dgManufacturers.AllowSorting = True
        dgManufacturers.DataBind()
    End Sub
</script>

How can I write the server-side code as a web method?

Many thanks!!
Brock

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