DiscoveryClientProtocol.References Property
A collection of references founds in resolved discovery documents.
[Visual Basic] Public ReadOnly Property References As _ DiscoveryClientReferenceCollection [C#] public DiscoveryClientReferenceCollection References {get;} [C++] public: __property DiscoveryClientReferenceCollection* get_References(); [JScript] public function get References() : DiscoveryClientReferenceCollection;
Property Value
A DiscoveryClientReferenceCollection of references discovered.
Remarks
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.
Example
[Visual Basic, C#] 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.
[Visual Basic] <%@ Page Language="VB" Debug="true" %> <%@ Import Namespace="System.IO" %> <%@ Import Namespace="System.Web.Services.Discovery" %> <%@ Import Namespace="System.Net" %> <%@ Import Namespace="System.Data" %> <HTML> <HEAD> <SCRIPT RUNAT="SERVER"> Public Sub Discover_Click(Source As Object, e as EventArgs ) ' Specify the URL to discover. Dim sourceUrl as String = DiscoURL.Text Dim client as DiscoveryClientProtocol = new DiscoveryClientProtocol() ' Use default credentials to access the URL being discovered. client.Credentials = CredentialCache.DefaultCredentials Try Dim doc As DiscoveryDocument ' Discover the URL for any discoverable documents. doc = client.DiscoverAny(sourceUrl) Catch e2 As Exception DiscoveryResultsGrid.Columns.Clear() Status.Text = e2.Message End Try ' If the discovered document contained references, display them in a data grid. If (client.References.Count > 0) Then 'populate our Grid with the discovery results PopulateGrid(client) End If End Sub Public Sub PopulateGrid(client As DiscoveryClientProtocol) Dim dt As DataTable = new DataTable() Dim dr AS DataRow dt.Columns.Add(new DataColumn("Reference") ) dt.Columns.Add(new DataColumn("Type") ) Dim entry As DictionaryEntry ' Iterate over the references in the discovered document, displaying their type. For Each entry in client.References dr = dt.NewRow() dr(0) = entry.Key dr(1) = entry.Value.GetType() dt.Rows.Add(dr) Next Dim dv As DataView = new DataView(dt) DiscoveryResultsGrid.DataSource = dv DiscoveryResultsGrid.DataBind() End Sub </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> [C#] <%@ 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>
[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button
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Requirements
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
See Also
DiscoveryClientProtocol Class | DiscoveryClientProtocol Members | System.Web.Services.Discovery Namespace