Problem with RsiOPCAuto

[yang1216]

Hi all.
I am creating a dotnet application with RsiOPCAuto.dll, and I have managed to read and write tags value. But today when I wanted to display all the online tags in a treeview, I met a problem.
Following is my code.

            List<string> lstItems = new List<string>();
            try
            {
                OPCBrowser browser = myServer.CreateBrowser();
                browser.ShowBranches();
                browser.ShowLeafs(true);
                var i = browser.GetEnumerator();
                if (browser.Organization == 1)
                {
                    while (i.MoveNext())
                    {
                        lstItems.Add(i.Current.ToString());
                    }
                }
            }
            catch (Exception err)
            {
                throw err;
            }

When it executed "browser.ShowLeafs(true);", an exeption "[HRESULT:0x80010105 (RPC_E_SERVERFAULT)]" was thrown.
Has anyone meet the same problem also?
Please help me, thanks in advance.

 

[yang1216]

Is there anyone can help me?

 

[Jean-Luc]

Hello,

Are you sure you can read the leafs directly for the root as you are doing. I think that you have to select a branch (by MoveDown or Moveto) before using ShowLeafs

 

[yang1216]

Hello,

Are you sure you can read the leafs directly for the root as you are doing. I think that you have to select a branch (by MoveDown or Moveto) before using ShowLeafs

Thanks very much.
I don't know what the branch means, is it group?
If I want to get all the item in the server, what should I do? Enumerate all the branches and then enumerate their leafs?

 

[Jean-Luc]

I think you have differents levels of branchs as Node, Device, Group for example (branchs of branchs).

I Think you have to read the branchs of the root, select the branch you want and continue to arrive at the leafs levels.

This link can give an idea of the structure of branches and leafs of an OPC server http://www.opclabs.com/forum/quickopc-net--9/1234-browse-da-branches-and-leaves-in-wpf-project

 

[yang1216]

Jean-Luc, Thanks very much, you are very helpful.