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C# example for reading multiple OPC UA tags

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12 Feb 2016 12:44 #3847 by support
Hello,
thank you for your interest in our products.

For a list of available examples: Start -> OPC Labs -> QuickOPC 5.3 -> Examples (.NET Source Code) -> About Examples,
or www.opclabs.com/files/documents/QuickOpc/Latest/Examples-QuickOPC.pdf .

A VS solution with C# examples: Start -> OPC Labs -> QuickOPC 5.3 -> Examples (.NET Source Code) -> Visual C# Examples.
In that solution, reading of multiple OPC UA tags can be seen in following examples:
  • Console -> UADocExamples -> _EasyUAClient.ReadMultiple.Main
  • Console -> UADocExamples -> _EasyUAClient.ReadMultipleValues.Main

And here is an actual code snippet taken from one of the examples:
public static void Main()
            {
                // Instantiate the client object
                var easyUAClient = new EasyUAClient();
 
                // Obtain attribute data. By default, the Value attributes of the nodes will be read.
                UAAttributeDataResult[] attributeDataResultArray = easyUAClient.ReadMultiple(new[]
                    {
                        new UAReadArguments("http://opcua.demo-this.com:51211/UA/SampleServer", "nsu=http://test.org/UA/Data/;i=10845"),
                        new UAReadArguments("http://opcua.demo-this.com:51211/UA/SampleServer", "nsu=http://test.org/UA/Data/;i=10853"),
                        new UAReadArguments("http://opcua.demo-this.com:51211/UA/SampleServer", "nsu=http://test.org/UA/Data/;i=10855")
                    });
 
                // Display results
                foreach (UAAttributeDataResult attributeDataResult in attributeDataResultArray)
                    Console.WriteLine("AttributeData: {0}", attributeDataResult.AttributeData);
 
                // Example output:
                //
                //AttributeData: 51 {System.Int16} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good
                //AttributeData: -1993984 {System.Single} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good
                //AttributeData: Yellow% Dragon Cat) White Blue Dog# Green Banana- {System.String} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good            
            }


I hope this helps

Best regards
Zbynek Zahradnik

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12 Feb 2016 12:33 #3846 by support
From: L,
Sent: Friday, February 12, 2016 11:12 AM
To: Z.
Subject: RE: OPC Labs Contact Form - Trial license

Hello Zbynek,

[...] “QuickOPC Standard, [...]. We will use this for an C# OPC UA client reading multiple tags, but I can’t find a C# program example?


Med venlig hilsen/Best regards

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