MultiSelect Property (UADataDialog)

Determines whether the dialog allows the user to select multiple nodes as output.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<DefaultValueAttribute(False)>
Public Property MultiSelect As Boolean

'Usage
 
Dim instance As UADataDialog
Dim value As Boolean
 
instance.MultiSelect = value
 
value = instance.MultiSelect

[DefaultValue(false)]
public bool MultiSelect {get; set;}

[DefaultValue(false)]
public:
property bool MultiSelect {
   bool get();
   void set (    bool value);
}

Remarks

When multi-select is enabled and the dialog allows the user to pick the OPC-UA endpoint, the count of endpoint descriptors must be the same as the count of node descriptors.

Example

// This example shows how to let the user browse for multiple OPC-UA data nodes (data variables or properties). 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

using System;
using System.Linq;
using System.Windows.Forms;
using OpcLabs.EasyOpc.UA.Forms.Browsing;

namespace UAFormsDocExamples._UADataDialog
{
    static partial class ShowDialog
    {
        public static void MultiSelect(IWin32Window owner)
        {
            var dataDialog = new UADataDialog
            {
                EndpointDescriptor = { UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" },
                // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
                // or "https://opcua.demo-this.com:51212/UA/SampleServer/"
                MultiSelect = true,
                UserPickEndpoint = true
            };

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

            // Display results
            MessageBox.Show(owner, 
                String.Join(Environment.NewLine, dataDialog.NodeElements.Select(element => element.ToString())));
        }
    }
}

# This example shows how to let the user browse for multiple OPC-UA data nodes (data variables or properties).
#
# 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 .
# 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.UA.Forms.Browsing import *


dataDialog = UADataDialog()
dataDialog.EndpointDescriptor.UrlString = 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'
# or 'http://opcua.demo-this.com:51211/UA/SampleServer' (currently not supported)
# or 'https://opcua.demo-this.com:51212/UA/SampleServer/'
dataDialog.MultiSelect = True
dataDialog.UserPickEndpoint = True

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

# Display results.
for nodeElement in dataDialog.NodeElements:
    print(nodeElement)

print()
print('Finished.')

' This example shows how to let the user browse for multiple OPC-UA data nodes (data variables or properties). 
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

Imports OpcLabs.EasyOpc.UA.Forms.Browsing

Namespace UAFormsDocExamples._UADataDialog
    Partial Friend Class ShowDialog
        Shared Sub MultiSelect(owner As IWin32Window)
            Dim dataDialog = New UADataDialog() With {
                .EndpointDescriptor = New OpcLabs.EasyOpc.UA.UAEndpointDescriptor With {
                    .UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"
                    },
                .MultiSelect = True,
                .UserPickEndpoint = True
                }
            ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            ' or "https://opcua.demo-this.com:51212/UA/SampleServer/"

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

            ' Display results
            MessageBox.Show(owner,
                String.Join(Environment.NewLine, dataDialog.NodeElements.Select(Function(element) element.ToString())))
        End Sub
    End Class
End Namespace

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

Reference

UADataDialog Class
UADataDialog Members

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