DiscoveryClientProtocol.DiscoverAny Method

Discovers the supplied URL to determine if it is a discovery document, service description or an XML Schema Definition (XSD) schema.

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

public DiscoveryDocument DiscoverAny (
	string url
public DiscoveryDocument DiscoverAny (
	String url
public function DiscoverAny (
	url : String
) : DiscoveryDocument
Not applicable.



The URL where XML Web services discovery begins.

Return Value

A DiscoveryDocument containing the results of XML Web services discovery at the supplied URL. If the url parameter refers to a service description or an XSD Schema, a DiscoveryDocument is created in memory for it.

Exception typeCondition


Accessing the supplied URL returned an HTTP status code other than OK.


The url parameteris a valid URL, but does not point to a valid discovery document, service description, or XSD schema.

The DiscoverAny method discovers whether the supplied URL is a discovery document, service description or XSD schema. If it is known that the URL only refers to a discovery document, the Discover method might be invoked.

If the supplied URL points to a valid discovery document, XSD schema, or service description, the discovery document at the supplied URL is added to the Documents and References collections. When the supplied URL refers to an XSD schema or Service Description a DiscoveryDocument is created in memory and added to the Documents and References collections. Additionally, references within the discovery document are added to the References collection, but not verified to point to valid discovery documents. To verify that references point to valid discovery documents, invoke the ResolveAll or ResolveOneLevel methods.

The following code example is a Web Form that populates a DataGrid with the details about the documents in the Documents property together with the references found in each document during an XML Web services discovery. The PopulateGrid method fills the DataGrid with the results from a DiscoverAny invocation followed by a call to ResolveAll.

 protected void Discover_Click(object Source, EventArgs e)
  // Specify the URL to discover.
  string sourceUrl = DiscoURL.Text;
  // Specify the URL to save discovery results to or read from.
  string outputDirectory = DiscoDir.Text;

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

           DiscoveryDocument doc;
        // Discover the URL for any discoverable documents. 
    doc = client.DiscoverAny(sourceUrl);
        // Resolve all possible references from the supplied URL.
      catch ( Exception e2) 
        Status.Text = e2.Message;
  // If documents were discovered, display the results in a data grid.
      if (client.Documents.Count > 0)

  // Save the discovery results to disk.
      DiscoveryClientResultCollection results = client.WriteAll(outputDirectory, "results.discomap");
      Status.Text = "The following file holds the links to each of the discovery results: <b>" + 
                                  Path.Combine(outputDirectory,"results.discomap") + "</b>";

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0