In This Topic

General

Icon:

With AECategoryConditionDialog, your application can integrate a dialog box from which the user can select OPC-A&E condition available on a specified event category:

Use the ServerDescriptor property to specify the OPC Alarms&Events server, and the CategoryId property to specify the event category to be browsed. Then, call the ShowDialog method. If the result is equal to DialogResult.OK, the user has selected the event condition, and information about it can be retrieved from the ConditionElement or ConditionName property.

Examples

C#
Python (.NET)

// This example shows how to let the user browse for an OPC Alarms&Events condition available on a specified event category.

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

namespace FormsDocExamples._AECategoryConditionDialog
{
    static class ShowDialog
    {
        public static void Main1(IWin32Window owner)
        {
            var categoryConditionDialog = new AECategoryConditionDialog()
            {
                ServerDescriptor = {ServerClass = "OPCLabs.KitEventServer.2"},
                CategoryId = 0x00EC0002  // Deviation
            };

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

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

# This example shows how to let the user browse for an OPC Alarms&Events condition available on a specified event
# category.

# 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.AlarmsAndEvents.Forms.Browsing import *


categoryConditionDialog = AECategoryConditionDialog()
categoryConditionDialog.ServerDescriptor.ServerClass = "OPCLabs.KitEventServer.2"
categoryConditionDialog.CategoryId = 0x00EC0002  # Deviation

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

# Display results.
print('ConditionElement: ', categoryConditionDialog.ConditionElement, sep='')

Advanced

If you want to change the parameters of the client object the component uses to perform its OPC operations, you can use the ClientSelector Property.

Examples - User Interface

Examples - User Interface - OPC A&E category condition dialog