Write service for custom datatypes
Posted: 20 Jul 2020, 11:21
Hi Team,
i have one usecase where i have a custom datatype (dynamically generated) under enumerations.
This customdatatype node has enumValues variable node as a child node.
From my client i want to set the value to one of variable node whose datatype is custom datatype.
Am getting badtypemismatch error. i have checked the datatype and valuerank is fine.
ex:
xyz--(DataType Node)
-->EnumValues(Variable node)
myvariablenode-->datatype is the xyz.
from client am sending list of extension objects which has only one item which is holding the value.
pls refer the client side code below.
server side code:
i have one usecase where i have a custom datatype (dynamically generated) under enumerations.
This customdatatype node has enumValues variable node as a child node.
From my client i want to set the value to one of variable node whose datatype is custom datatype.
Am getting badtypemismatch error. i have checked the datatype and valuerank is fine.
ex:
xyz--(DataType Node)
-->EnumValues(Variable node)
myvariablenode-->datatype is the xyz.
from client am sending list of extension objects which has only one item which is holding the value.
pls refer the client side code below.
Code: Select all
byte[] cp;
var customDataTypeReferenceDescriptions = GetCustomDataTypesFromServer(dataType, session);
if (customDataTypeReferenceDescriptions.Count > 0)
{
var customDataTypeChildNode =
session.Browse(customDataTypeReferenceDescriptions[0].NodeId.ToNodeId(session.NamespaceUris),
out cp);
var arrayOfExtensionObjects = ReadArrayOfEnumValues(session, customDataTypeChildNode[0].NodeId.ToNodeId(session.NamespaceUris),
Attributes.Value);
var mappedExtensionObject = arrayOfExtensionObjects.SingleOrDefault(item =>
((EnumValueType) item.Body).DisplayName.ToString(null,CultureInfo.InvariantCulture) == value);
List<ExtensionObject> listOfExtensionObjects = new List<ExtensionObject>();
listOfExtensionObjects.Add(mappedExtensionObject);
return CreateWriteValue(Attributes.Value, new Variant(listOfExtensionObjects),
nodeId);
}server side code:
Code: Select all
var array = (ExtensionObject[])updateNodesParameter.Value.Value;
var listOfDataValues = array.Select(item => new EnumValueType
{
DisplayName = ((EnumValueType)item.Body).DisplayName,
Value = ((EnumValueType)item.Body).Value,
Description = ((EnumValueType)item.Body).Description
}).ToList();
updateNodesParameter.Value = new DataValue() { WrappedValue = new Variant(listOfDataValues) };
var x = m_UpdateNodesParameter.MmdNodeManager.writeToOpcua(m_UpdateNodesParameter.Context,
m_UpdateNodesParameter.NodeHandle,
m_UpdateNodesParameter.IndexRange, m_UpdateNodesParameter.Value);
return x;