Step 1 - Create the Visual Studio Project.

Step 2 - Display the contents of sparqlview as a table on the page

To display the RDF data on the web page we create a table with a row for each item in sparqlview. We then use each IRI from sparqlview to create a hyperlink. The hyperlinks are displayed in the table cells. To do this add the following block of code to the page_load method in Default.aspx.cs.

 DemoModel.DemoEntities svc = new DemoModel.DemoEntities(new Uri("http://example.com/WebDataService1.svc"));

  var query = svc.sparqlview;
  Table iriTable = new Table();
  this.Controls.Add(iriTable);

  foreach (DemoModel.sparqlview sv in query)
  {
      TableRow tRow = new TableRow();
      iriTable.Rows.Add(tRow);
      TableCell tCell = new TableCell();
      tRow.Cells.Add(tCell);
      HyperLink h = new HyperLink();
      h.Text = sv.s;
      h.NavigateUrl = sv.s;
      tCell.Controls.Add(h);
  }

Note the address of the service in the first line - you may need to change the port number to match the one seen in the address at the end of Step 4 in Creating the Web Service.

Compile and run RDFWebApp (ensuring that the service created above is still running). This will launch a browser and display the IRIs from sparqlview as a list of hyperlinks.

Figure2.164.list of hyperlinks

With the Cartridges VAD package installed in Virtuoso, clicking on these links will take you to a description page of the referenced resource. The description page is created using description.vsp .

Figure2.165.Description page