Add a new C# class to the project called ExtendedStringHandler, by Right clicking on RDFDemo in the

Solution Explorer

and

Add

a

Class

.

Add the following using statements to the top of the file

using OpenLink.Data.Virtuoso;
using System.Data;
using System.Windows.Forms;
using System.Drawing;
using System.Data.Mapping;
using System.Data.Common;

Paste the following block of code into the class definition.

StringBuilder DescribeCommand;
VirtuosoConnection ParentConnection;
List<Label> labelList = new List<Label>();
List<TextBox> textBoxList = new List<TextBox>();
DescribeDataSet describeDataSet = new DescribeDataSet();
Boolean isIRI = false;

public ExtendedStringHandler(SqlExtendedString iri, VirtuosoConnection parentConnection)
 {
     ParentConnection = parentConnection;
     if (iri.IriType == SqlExtendedStringType.IRI)
     {
         isIRI = true;
         DescribeCommand = new StringBuilder("sparql select * from <http://demo.openlinksw.com/Northwind> where {<" + iri.ToString() + "> ?p ?o}");      // Replace demo.openlinksw.com with your  URIQA DefaultHost setting
     }
 }

 public string describeCommandText
 {
     get
     {
         return DescribeCommand.ToString();
     }
 }

 public void getDescribeData()
 {
      VirtuosoCommand myCommand = new VirtuosoCommand(this.describeCommandText, this.ParentConnection);
     VirtuosoDataAdapter myAdapter = new VirtuosoDataAdapter();
     myAdapter.SelectCommand = myCommand;
     myAdapter.Fill(describeDataSet.DataTable1);
 }

 public void displayData()
 {
     if (isIRI)
     {
         getDescribeData();
         Form describeForm = new Form();
         describeForm.AutoScroll = true;
         describeForm.Width = 840;

         Label label1 = new Label();
         label1.AutoSize = true;
         label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size + 3.0F, label1.Font.Style | FontStyle.Bold, label1.Font.Unit);
         describeForm.Controls.Add(label1);

         DataTable table1 = describeDataSet.Tables[0];
         if (table1.Rows.Count == 0)
             label1.Text = "No Details Available";
         else
         {
             foreach (DataRow row in table1.Rows)
                 if (row[0].ToString() == "http://www.w3.org/1999/02/22-rdf-syntax-ns#type")
                 {
                     StringBuilder title = new StringBuilder(row[1].ToString() + " details");
                     label1.Text = title.ToString();
                     break;
                 }

             foreach (DataRow row in table1.Rows)
             {
                 Label propertyLabel = new Label();
                 TextBox valueBox = new TextBox();
                 valueBox.Width = 400;

                 object property = row[0];
                 object value = row[1];

                 if (value is SqlExtendedString)
                 {
                     valueBox.ForeColor = Color.Blue;
                     valueBox.Font = new Font(valueBox.Font.FontFamily, valueBox.Font.Size, valueBox.Font.Style | FontStyle.Underline, valueBox.Font.Unit);
                 }
                 propertyLabel.Text = row[0].ToString();
                 propertyLabel.AutoEllipsis = true;
                 propertyLabel.AutoSize = false;
                 propertyLabel.Width = propertyLabel.PreferredWidth > 380 ? 380 : propertyLabel.PreferredWidth;

                 Binding bind = new Binding("Text", row[1], "");
                 valueBox.DataBindings.Add(bind);

                 labelList.Add(propertyLabel);
                 textBoxList.Add(valueBox);
             }

             for (int i = 0; i < table1.Rows.Count; i++)
             {
                 textBoxList[i].Click += new EventHandler(this.iri_Click);
                 labelList[i].Location = new Point(10, i * 20 + 50);
                 textBoxList[i].Location = new Point(400, i * 20 + 50);
                 describeForm.Controls.Add(labelList[i]);
                 describeForm.Controls.Add(textBoxList[i]);
             }

             describeForm.Height = labelList.Count * 20 + 100 > 500 ? 500 : labelList.Count * 20 + 100;
         }
         describeForm.ShowDialog();
     }
     else
     {
         Form blankForm = new Form();
         Label label1 = new Label();
         label1.Text = "Blank Node";
         label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size + 3.0F, label1.Font.Style | FontStyle.Bold, label1.Font.Unit);
         blankForm.ShowDialog();
     }
 }

 public void iri_Click(object sender, EventArgs e)
 {
     int boxNum = 0;

     for (int i = 0; i < textBoxList.Count; i++)
     {
         if (sender == textBoxList[i])
         {
             boxNum = i;
             break;
         }
     }

    Object o = describeDataSet.DataTable1.Rows[boxNum][1];
     if (o is SqlExtendedString)
     {
         SqlExtendedString se = (SqlExtendedString)o;
         ExtendedStringHandler seHandler = new ExtendedStringHandler(se, ParentConnection);
         seHandler.displayData();
     }
     else if (o is SqlRdfBox)
     {
        //doesn't do anything at the moment
    }
 }