An XML Web service that exposes the Default table from Northwind (VB) : WebService « Development « ASP.NET Tutorial






File: App_Code\Default.vb


Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.Data
Imports System.Data.SqlClient

<WebService(Namespace := "http://www.tempuri.com/customers")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
Public Class Default
     Inherits System.Web.Services.WebService

    <WebMethod()> _
    Public Function GetDefault() As DataSet
        Dim conn As SqlConnection
        Dim myDataAdapter As SqlDataAdapter
        Dim myDataSet As DataSet
        Dim cmdString As String = "Select * From Default"

        conn = New SqlConnection("Server=localhost;uid=sa;pwd=;database=Northwind")
        myDataAdapter = New SqlDataAdapter(cmdString, conn)

        myDataSet = New DataSet()
        myDataAdapter.Fill(myDataSet, "Default")

        Return myDataSet
    End Function

End Class

 
Changes to the web.config file after making a reference to the Web service 

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
   <appSettings>
      <add key="MyNamespace.Default" 
       value="http://www.tempuri.com/MyWebService/Default.asmx"/>
   </appSettings>
</configuration>


Consuming the Default Web service in an ASP.NET page 
<%@ Page Language="C#" %>

<script runat="server">
    protected void Button1_Click(Object sender, EventArgs e) {
       MyNamespace.Default ws = new MyNamespace.Default();
       GridView1.DataSource = ws.GetDefault();
       GridView1.DataBind();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Web Service Consumer Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="Button1" Runat="server" Text="Get Default" 
         OnClick="Button1_Click" />
        <br />
        <br />
        <asp:GridView ID="GridView1" Runat="server">
            <FooterStyle ForeColor="#8C4510" BackColor="#F7DFB5"></FooterStyle>
            <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center"></PagerStyle>
            <HeaderStyle ForeColor="White" Font-Bold="True" 
             BackColor="#A55129"></HeaderStyle>
            <SelectedRowStyle ForeColor="White" Font-Bold="True" 
             BackColor="#738A9C"></SelectedRowStyle>
            <RowStyle ForeColor="#8C4510" BackColor="#FFF7E7"></RowStyle>
        </asp:GridView>  
    </div>
    </form>
</body>
</html>








9.47.WebService
9.47.1.Contents of the Service.asmx file
9.47.2.An XML Web service that exposes the Default table from Northwind (C#)
9.47.3.An XML Web service that exposes the Default table from Northwind (VB)
9.47.4.WebMethod overloading in .NET
9.47.5.Turning off conformance using the web.config file
9.47.6.Utilizing the CacheDuration property
9.47.7.A Web service class that utilizes a SOAP header (C#)
9.47.8.A Web service class that utilizes a SOAP header (VB)
9.47.9.WebServiceBinding
9.47.10.WebMethod