private void CategoryTree_BeforeExpand(object sender, System.Windows.Forms.TreeViewCancelEventArgs e)
{
CategoryTreeNode node = (CategoryTreeNode)e.Node;
if (!node.HasDownloadedChildren)
{
GetChildren(node);
}
}
private void GetChildren(CategoryTreeNode node)
{
node.Nodes.Clear();
GetRelatedCategories grc = new GetRelatedCategories();
Category cat = new Category(node.CategoryValue.TModelKey, node.CategoryValue.KeyValue);
grc.Categories.Add(cat);
//
// If the Parent is null, it is a root node (tModel)
//
if (node.IsSchemeNode)
{
grc.Categories[0].RelationshipQualifiers.Add(RelationshipQualifier.root);
}
else
{
grc.Categories[0].RelationshipQualifiers.Add(RelationshipQualifier.child);
}
CategoryList list = null;
try
{
list = grc.Send(_connection);
}
catch (Exception e)
{
MessageBox.Show(this, e.Message, "Error Loading Tree Node");
return;
}
CategoryValueCollection values;
if (node.IsSchemeNode)
{
values = list.CategoryInfos[0].Roots;
}
else
{
values = list.CategoryInfos[0].Children;
}
foreach (CategoryValue val in values)
{
CategoryTreeNode subnode = new CategoryTreeNode(val);
subnode.CategoryValue.TModelKey = node.CategoryValue.TModelKey;
node.Nodes.Add(subnode);
}
node.HasDownloadedChildren = true;
}
public void LoadTModels( )
{
FindTModel ft = new FindTModel();
ft.CategoryBag.Add(CommonCanonical.UddiOrgTypes, "categorization", "Categorization (taxonomy)");
TModelList list = null;
try
{
list = ft.Send(_connection);
}
catch (Exception e)
{
MessageBox.Show(this, e.Message, @"Error loading Category Tree", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
if (null == list)
{
MessageBox.Show(this, @"An unknown error occurred while loading the Category Tree.", @"Error loading Category Tree", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
GetRelatedCategories grc = new GetRelatedCategories();
Category c = new Category();
c.RelationshipQualifiers.Add(RelationshipQualifier.root);
foreach (TModelInfo info in list.TModelInfos)
{
bool categorization = false;
c.TModelKey = info.TModelKey;
grc.Categories.Add(c);
CategoryList cl = null;
try
{
cl = grc.Send(_connection);
categorization = true;
}
catch (InvalidKeyPassedException)
{
//
// tModel doesn't represent a categorization. So, don't show
// it in the tree.
//
}
catch (Exception e)
{
//
// if anything else happened, re-throw & let the app deal with it.
//
throw e;
}
if (categorization)
{
//
// Create a new node and wrap the tModelInfo into a
// CategoryInfo object.
//
CategoryTreeNode catnode = new CategoryTreeNode(new CategoryInfo(info.TModelKey));
catnode.Nodes.Clear();
//
// Set the Text of the node to the text of the tModel.
//
catnode.Text = info.Name.Text;
CategoryValueCollection values = cl.CategoryInfos[0].Roots;
foreach (CategoryValue val in values)
{
CategoryTreeNode subnode = new CategoryTreeNode(val);
subnode.CategoryValue.TModelKey = catnode.CategoryValue.TModelKey;
catnode.Nodes.Add(subnode);
}
catnode.HasDownloadedChildren = true;
//
// Add the node to the root.
//
Nodes.Add(catnode);
}
}
}