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DiscoveryClientProtocol.References Property

A collection of references founds in resolved discovery documents.

Namespace:  System.Web.Services.Discovery
Assembly:  System.Web.Services (in System.Web.Services.dll)

public DiscoveryClientReferenceCollection References { get; }

The References collection is populated during invocations to the Discover, DiscoverAny, ResolveAll and ResolveOneLevel methods. During invocations to the Discover and DiscoverAny methods, if the supplied URL is a valid discovery document, that document is added to the References collection together with references found in the discovery document. References added during invocations to the Discover and DiscoverAny methods are not necessarily valid discovery documents. During invocations to ResolveAll and ResolveOneLevel references within the References collection are verified as being valid discovery documents. If they are valid and contain references, they are also added to the References collection.

The following code example is a Web Form that populates a DataGrid with the details about the references in the References property discovered during an XML Web services discovery. The PopulateGrid method fills the DataGrid with the references found in an invocation to DiscoverAny.

Security noteSecurity Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Page Language="C#" Debug="true" %>

<%@ Import Namespace="System.Web.Services.Discovery" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Net" %>
<%@ Import Namespace="System.Data" %>

<HTML>
<HEAD>
   <SCRIPT RUNAT="SERVER">
   protected void Discover_Click(object Source, EventArgs e)
   {
	// Specify the URL to discover.
	string sourceUrl = DiscoURL.Text;

        DiscoveryClientProtocol client = new DiscoveryClientProtocol();
	// Use default credentials to access the URL being discovered.
        client.Credentials = CredentialCache.DefaultCredentials;

        try 
        {
       	  DiscoveryDocument doc;

          // Discover the URL for any discoverable documents. 
	  doc = client.DiscoverAny(sourceUrl);
        }
        catch ( Exception e2) 
        {
          DiscoveryResultsGrid.Columns.Clear();
          Status.Text = e2.Message;
        }
	// If the discovered document contained, references display them in a data grid.
        if (client.References.Count > 0)
	    PopulateGrid(client);
   }

      protected void PopulateGrid(DiscoveryClientProtocol client) 
      {
         DataTable dt = new DataTable();
         DataRow dr;

         dt.Columns.Add(new DataColumn("Reference") );
         dt.Columns.Add(new DataColumn("Type") );

	 // Iterate over the references in the discovered document, displaying their type.
         foreach (DictionaryEntry entry in client.References) 
         {
                dr = dt.NewRow();
  		dr[0] = (string) entry.Key;
		dr[1] = entry.Value.GetType();
		dt.Rows.Add(dr);
         }
        DataView dv = new DataView(dt);
	DiscoveryResultsGrid.DataSource = (ICollection) dv;
	DiscoveryResultsGrid.DataBind();

    }
  </SCRIPT>
  </HEAD> 
  <BODY>
	<H3> <p align="center"> Discovery Class Sample </p> </H3>
        <FORM RUNAT="SERVER">
	<hr>	
	 Enter the URL to discover:
        <asp:textbox id=DiscoURL Columns=60 runat="SERVER" /><p>

	<p align="center"> <asp:Button id=Discover Text="Discover!" onClick="Discover_Click" runat="SERVER"/> </p><p>

        <hr>
        <asp:label id="Status" runat="SERVER" /><p>
     <asp:DataGrid id="DiscoveryResultsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="true"
           runat="server">

         <HeaderStyle BackColor="DarkBlue" ForeColor="White">
         </HeaderStyle>

         <AlternatingItemStyle BackColor="LightYellow">
         </AlternatingItemStyle>

     </asp:DataGrid>
        </FORM>
  </BODY>

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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