private void treeOpcItems_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
{
listOpcView.Items.Clear();
RemoveItem(); // remove item from group
try
{
theSrv.ChangeBrowsePosition(OPCBROWSEDIRECTION.OPC_BROWSE_TO, ""); // to root
if (e.Node.FullPath.Length > rootname.Length) // check if it's only the dummy root
{
selectednode = e.Node.FullPath.Substring(rootname.Length + 1);
string[] splitpath = selectednode.Split(new char[] { '\t' }); // convert path-string to string-array (separator)
foreach (string n in splitpath)
{
theSrv.ChangeBrowsePosition(OPCBROWSEDIRECTION.OPC_BROWSE_DOWN, n); // browse to node in OPC namespace
}
}
else
{
selectednode = "";
}
// get all items at this node level
ArrayList lst;
theSrv.Browse(OPCBROWSETYPE.OPC_LEAF, out lst);
if (lst == null)
{
return;
}
if (lst.Count < 1)
{
return;
}
// enum+add all item names to ListView
string[] itemstrings = new string[2];
foreach (string item in lst)
{
itemstrings[0] = item;
itemstrings[1] = theSrv.GetItemID(item);
listOpcView.Items.Add(new ListViewItem(itemstrings, 0));
}
// preselect top item in ListView
listOpcView.Items[0].Selected = true;
}
catch (Exception ex) // exceptions MUST be handled
{
MessageBox.Show(this, "browse error! " + ex.ToString(), "Exception browsing namespace", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
}
private void RecursiveServerHierarchialBrowse(ref List <string> p_ItemIds)
{
ArrayList l_ItemList;
_server.Browse(OpcBrowseType.OPC_LEAF, out l_ItemList);
foreach (string l_ItemName in l_ItemList)
{
p_ItemIds.Add(_server.GetItemID(l_ItemName));
}
ArrayList l_BranchList;
_server.Browse(OpcBrowseType.OPC_BRANCH, out l_BranchList);
foreach (string l_BranchName in l_BranchList)
{
_server.ChangeBrowsePosition(OpcBrowseDirection.OPC_BROWSE_DOWN, l_BranchName);
RecursiveServerHierarchialBrowse(ref p_ItemIds);
_server.ChangeBrowsePosition(OpcBrowseDirection.OPC_BROWSE_UP, "");
}
}
public void TestGetItemID01()
{
//testing --
OpcServer opcServer = new OpcServer();
Accessor opcServerAccessor = ReflectionAccessor.Wrap(opcServer);
opcServerAccessor.SetField("ifServer", new OPCServerComClass());
opcServerAccessor.SetField("ifBrowse", ((IOPCBrowseServerAddressSpace)opcServerAccessor.GetField("ifServer")));
//Test Procedure Call
opcServer.GetItemID("Item1");
//Post Condition Check
}
