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After we browse and select multiple items we get a crash

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19 Nov 2020 18:57 #9207 by micham
Thank you. It is working now.
Michael

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19 Nov 2020 18:46 #9206 by support
UAObjectIds is a class in the OpcLabs.EasyOpc.UA.AddressSpace.Standard Namespace:

opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...rd.UAObjectIds_properties.html

Add "Imports OpcLabs.EasyOpc.UA.AddressSpace.Standard" to the list of Imports at the beginning of the code file.

Best regards
The following user(s) said Thank You: micham

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19 Nov 2020 18:28 #9205 by micham
Hi,

When I add this line before the ShowDialog line, I get an error on "UAObjectIds.ObjectsFolder". Do I need to define this variable? If yes, how?

uaDataDialog1.NodeDescriptor = New UANodeDescriptor(UAObjectIds.ObjectsFolder)
If uaDataDialog1.ShowDialog() = DialogResult.OK Then

Thanks.

Michael

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19 Nov 2020 17:22 #9204 by support
Hello.

I wrote "a workaround would be ... always just before calling ShowDialog();"

There is just one line in your code snippet that calls ShowDialog, thus the instructions are unambiguous. So, you need to insert the additional statement just before the statement that calls ShowsDialog.

Best regards

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19 Nov 2020 16:43 #9203 by micham
I am not kidding you...
I know the difference between C# and VB.Net...

Can you show me what to replace in my VB.Net code by your line of code (dataDialog.NodeDescriptor = New UANodeDescriptor(UAObjectIds.ObjectsFolder)).

Thank you.

Michael

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19 Nov 2020 16:26 #9202 by support
You must be kidding me. Have not tested that, but in VB.NET it will probably look like this:
dataDialog.NodeDescriptor = New UANodeDescriptor(UAObjectIds.ObjectsFolder)
So the difference would be the missing semicolon at the end, if I do not count the uppercase 'N' in "new".

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19 Nov 2020 15:57 #9201 by micham
Hi,

Thank you. Our code is in VB.Net. Do you have a workaround in VB.net?

Thanks.

Michael

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19 Nov 2020 14:27 #9200 by support
Hello,

this turned out to be a bug in UADataDialog, thank you for pointing it out.
It will be fixed in QuickOPC 2020.3 which should be out in December.

For now, a workaround would be to reset the NodeDescriptor proeprty of the dialog always just before calling ShowDialog(); in C#, it looks like this:
dataDialog.NodeDescriptor = new UANodeDescriptor(UAObjectIds.ObjectsFolder);
Best regards

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19 Nov 2020 08:07 - 19 Nov 2020 08:14 #9196 by micham
Here it is. I have a button that calls this sub.
Public Sub GlobalTagBrowse_UA(MyServer As String)
        'Dim server_properties As OPC_servers_data
        Dim easyDAClient = New EasyDAClient()
        Dim values() As UANodeDescriptor
        Dim i As Integer = 0
        Dim itmX As ListViewItem
        Dim itemF As ListViewItem
        Dim nodeId As String
        'Dim Index As Integer
        'Dim NamespaceIndex As Integer
        Dim L As String
 
 
        nodeId = ""
        If (MyServer.Length > 0) Then
            uaDataDialog1.EndpointDescriptor = MyServer
            uaDataDialog1.MultiSelect = True
            If uaDataDialog1.ShowDialog() = DialogResult.OK Then
                values = uaDataDialog1.NodeDescriptors  'NodeDescriptors
                For i = 0 To (values.Count - 1)
                    L = "s"
                    Select Case values(i).NodeId.NodeIdType.ToString
                        Case "String"
                            L = "s"
                        Case "Numeric"
                            L = "n"
                    End Select
                    nodeId = "ns=" + values(i).NodeId.NamespaceIndex.ToString + ";" + L + "=0:" + values(i).NodeId.Identifier.ToString
                    itemF = ListView2.FindItemWithText(nodeId) 'values(i).NodeId.ToString) ' 
                    If (itemF Is Nothing) Then
                        itmX = ListView2.Items.Add(nodeId, 0) ' values(i).NodeId.ToString
                        If values(i).BrowsePath.Length > 0 Then
                            itmX.SubItems.Add(values(i).BrowsePath.ToString)
                        Else
                            itmX.SubItems.Add("")
                        End If
                    End If
                Next i
            End If
        Else
            MsgBox("Enter the OPC-UA server endpoint first.", vbExclamation, "Info")
        End If
    End Sub

Thank you.
Michael
Last edit: 19 Nov 2020 08:14 by support. Reason: code formatting

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18 Nov 2020 20:40 #9192 by support
Thank you. This is what I needed. It does not yet give me the full picture, but it is a step forward.

I suspect that this problem might be a combination of not-too-well documented requirements for arguments used with MultiSelect (my fault), and some specific thing in your code that violates these requirements (which you could not know). Specifically, I am interested in how you set the NodeDescriptors and and EndpointDescriptors of the UADataDialog in your code.

Can you post here the whole loop (so that I can see what happens when between the subsequent runs of the dialog)? Or, if it is confidential, can you send it to me by email?

Thank you

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