Examples - User Interface - OPC DA item dialog

.NET

// This example shows how to let the user browse for an OPC Data Access item. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System.Windows.Forms;
using OpcLabs.EasyOpc.DataAccess.Forms.Browsing;

namespace FormsDocExamples._DAItemDialog
{
    static class ShowDialog
    {
        public static void Main1(IWin32Window owner)
        {
            var itemDialog = new DAItemDialog
            {
                ServerDescriptor = {ServerClass = "OPCLabs.KitServer.2"}
            };

            DialogResult dialogResult = itemDialog.ShowDialog(owner);
            if (dialogResult != DialogResult.OK)
                return;

            // Display results
            MessageBox.Show(owner, $"NodeElement: {itemDialog.NodeElement}");
        }
    }
}

# This example shows how to let the user browse for an OPC Data Access item. 
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in PowerShell on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PowerShell .
# Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
# a commercial license in order to use Online Forums, and we reply to every post.

# The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows .
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcForms.dll"

$itemDialog = New-Object OpcLabs.EasyOpc.DataAccess.Forms.Browsing.DAItemDialog
$itemDialog.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"

$dialogResult = $itemDialog.ShowDialog()
if ($dialogResult -ne [System.Windows.Forms.DialogResult]::OK) {
    return
}

# Display results
Write-Host "NodeElement: $($itemDialog.NodeElement)"

' This example shows how to let the user browse for an OPC Data Access item.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET .
' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
' a commercial license in order to use Online Forums, and we reply to every post.

Imports OpcLabs.EasyOpc
Imports OpcLabs.EasyOpc.DataAccess.Forms.Browsing

Namespace FormsDocExamples._DAItemDialog
    Friend Class ShowDialog
        Shared Sub Main1(owner As IWin32Window)
            Dim itemDialog = New DAItemDialog() With {
                .ServerDescriptor = New ServerDescriptor() With {
                    .ServerClass = "OPCLabs.KitServer.2"
                }
            }

            Dim dialogResult As DialogResult = itemDialog.ShowDialog(owner)
            If dialogResult <> DialogResult.OK Then
                Return
            End If

            ' Display results
            MessageBox.Show(owner, $"NodeElement: {itemDialog.NodeElement}")
        End Sub
    End Class
End Namespace

COM

// This example shows how to let the user browse for an OPC Data Access item.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

class procedure ShowDialog.Main;
var
  ItemDialog: OpcLabs_EasyOpcForms_TLB._DAItemDialog;
begin
  // Instantiate the dialog object
  ItemDialog := CoDAItemDialog.Create;

  ItemDialog.ServerDescriptor.ServerClass := 'OPCLabs.KitServer.2';

  ItemDialog.ShowDialog(nil);

  // Display results
  WriteLn(ItemDialog.NodeElement.ToString);
end;

Rem This example shows how to let the user browse for an OPC Data Access item.
Rem
REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB .
REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
REM a commercial license in order to use Online Forums, and we reply to every post.

Private Sub ShowDialog_Main_Command_Click()
    OutputText = ""

    ' Instantiate the dialog object
    Dim itemDialog As New DAItemDialog
    Dim DialogResult
    DialogResult = itemDialog.ShowDialog
    
    itemDialog.serverDescriptor.ServerClass = "OPCLabs.KitServer.2"
    
    OutputText = OutputText & DialogResult & vbCrLf
    If DialogResult <> 1 Then   ' OK
        Exit Sub
    End If
    
    ' Display results
    OutputText = OutputText & itemDialog.nodeElement & vbCrLf
End Sub

Rem This example shows how to let the user browse for an OPC Data Access item. 
Rem
Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript .
Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
Rem a commercial license in order to use Online Forums, and we reply to every post.

Option Explicit

Const DialogResult_OK = 1

Dim ItemDialog: Set ItemDialog = CreateObject("OpcLabs.EasyOpc.DataAccess.Forms.Browsing.DAItemDialog")
ItemDialog.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"
Dim dialogResult: dialogResult = ItemDialog.ShowDialog
WScript.Echo dialogResult

If dialogResult <> DialogResult_OK Then
    WScript.Quit
End If

' Display results
WScript.Echo "NodeElement: " & ItemDialog.NodeElement

Python

Python (.NET)

# This example shows how to let the user browse for an OPC Data Access item.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
# a commercial license in order to use Online Forums, and we reply to every post.
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc

# Import .NET namespaces.
from System.Windows.Forms import *
from OpcLabs.EasyOpc.DataAccess.Forms.Browsing import *


itemDialog = DAItemDialog()
itemDialog.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"

dialogResult = itemDialog.ShowDialog()
print(dialogResult)
if dialogResult != DialogResult.OK:
    exit()

# Display results.
print('NodeElement: ', itemDialog.NodeElement, sep='')

Concepts

OPC-DA Item Dialog