Try this:

string xml = diagramView.Diagram.SaveToString(SaveToStringFormat.Xml);

hi,

    Thanx for ur support. iam getting and binding the diagramid i.e long string.Now iam facing the problem with uniqueid which is not binding to the node.Below is the code

string id = ds1.Tables["Nodes"].Rows[0]["UniqueId"].ToString();
                       ShapeNode shapeNode = diagramView.Diagram.FindNode(id) as ShapeNode;
                       if (shapeNode != null)


                           shapeNode.Text = ds1.Tables["Nodes"].Rows[0]["Location"].ToString();

I done debugging Iam getting the unique in string 'id'.But it is not binding to the shapenode

i.e   ShapeNode shapeNode = diagramView.Diagram.FindNode(id) as ShapeNode;


Can u Please check once.

     Hi,

        Iam using diagram.Loadfromstring still the uniqueid is not biinding to the node.

SqlCommand SQLcmd = new SqlCommand();
               DataSet ds = new DataSet();
               string query = "Select DiagramId from BOmSystem Where Ltrim(DiagramFile) ='" + diagramId + "'";
               SqlDataAdapter da = new SqlDataAdapter(query, con);
               da.Fill(ds, "Diagram");


               //DiagramTableTableAdapter diagAdapter = new DiagramTableTableAdapter();
               //DiagramsSet.DiagramTableDataTable diagTable = diagAdapter.GetData(diagramId);
               if (ds.Tables["Diagram"].Rows.Count > 0)
               {
                   string diagramString = ds.Tables["Diagram"].Rows[0]["DiagramID"].ToString();
                   diagramView.Diagram.LoadFromString(diagramString);

                   SqlConnection con1 = new SqlConnection(connstr);


                   DataSet ds1 = new DataSet();
                   string query1 = "Select * from BOmSystem Where Ltrim(DiagramFile) ='" + diagramId + "'";
                   SqlDataAdapter da1 = new SqlDataAdapter(query1, con1);
                   da1.Fill(ds1, "Nodes");

                   if (ds1.Tables["Nodes"].Rows.Count > 0)
                   {
                       string id = ds1.Tables["Nodes"].Rows[0]["UniqueId"].ToString();
                       ShapeNode shapeNode = diagramView.Diagram.FindNode(id) as ShapeNode;
                       if (shapeNode != null)


                           shapeNode.Text = ds1.Tables["Nodes"].Rows[0]["Location"].ToString();
                                      



                   }
               }



Still it is not binding iam getting both diagramvviewud and uniqueid.Iam able to bind the diagramviewid to diagram but unable to bind the uniqueid to node.

string id = ds1.Tables["Nodes"].Rows[0]["UniqueId"].ToString();
                       ShapeNode shapeNode = diagramView.Diagram.FindNode(id) as ShapeNode;


can u check once.

   hi,

     I have tyaken column name as DiagramID for which we are storing the long string.I done debugging process there iam getting the 2 vaklues i.e Long string and UniqueId.Long string si binding to the Diagram but uniqueid is not binding to the nodes.

So,I think some problem with the binding to the node.

Can u Check once.

Hi,

So, the DiagramFile column contains diagram IDs, and the DiagramID column contains the diagram data? If you believe that's correct, you might also check whether the diagram loaded from the database is up to date and contains the newly created node. E.g. loop over all items in diagram.Nodes and Debug.Print their tags to see if the new node is there indeed.

Stoyan

foreach (DiagramNode node in diagram.Nodes)
     Debug.WriteLine(node.Tag == null ? "null" : node.Tag.ToString());

The project you've emailed me saves the diagram in the session upon the first page load:

protected void Page_Load(object sender, EventArgs e)
{
     if (!IsPostBack)
     {
           string diagramString = diagramView.Diagram.SaveToString();
           Session["DiagramId"] = diagramString;
           ...

The diagram is empty at that point. and this is the only assignment to Session["DiagramId"]. Later you are saving this empty diagram into the database, and so FindNode can't find anything after loading it again.

In the else case (when IsPostback is true), you are loading the diagram and losing the data that was posted back. I suppose that code is intended for your auto-refresh feature. If so, you should simply swap the if / else blocks; the diagram should be saved in the session after postback, and loaded from the database in the if (!IsPostBack) case.