/// <summary>
/// 读取一个节点的所有属性
/// </summary>
/// <param name="tag">节点信息</param>
/// <returns>节点的特性值</returns>
public OpcNodeAttribute[] ReadNoteAttributes(string tag)
{
NodeId sourceId = new NodeId(tag);
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
// attempt to read all possible attributes.
// 尝试着去读取所有可能的特性
for (uint ii = Attributes.NodeClass; ii <= Attributes.UserExecutable; ii++)
{
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = sourceId;
nodeToRead.AttributeId = ii;
nodesToRead.Add(nodeToRead);
}
int startOfProperties = nodesToRead.Count;
// find all of the pror of the node.
BrowseDescription nodeToBrowse1 = new BrowseDescription();
nodeToBrowse1.NodeId = sourceId;
nodeToBrowse1.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse1.ReferenceTypeId = ReferenceTypeIds.HasProperty;
nodeToBrowse1.IncludeSubtypes = true;
nodeToBrowse1.NodeClassMask = 0;
nodeToBrowse1.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse1);
// fetch property references from the server.
ReferenceDescriptionCollection references = FormUtils.Browse(m_session, nodesToBrowse, false);
if (references == null)
{
return(new OpcNodeAttribute[0]);
}
for (int ii = 0; ii < references.Count; ii++)
{
// ignore external references.
if (references[ii].NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)references[ii].NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodesToRead.Add(nodeToRead);
}
// read all values.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
// process results.
List <OpcNodeAttribute> nodeAttribute = new List <OpcNodeAttribute>();
for (int ii = 0; ii < results.Count; ii++)
{
OpcNodeAttribute item = new OpcNodeAttribute();
// process attribute value.
if (ii < startOfProperties)
{
// ignore attributes which are invalid for the node.
if (results[ii].StatusCode == StatusCodes.BadAttributeIdInvalid)
{
continue;
}
// get the name of the attribute.
item.Name = Attributes.GetBrowseName(nodesToRead[ii].AttributeId);
// display any unexpected error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
item.Type = Utils.Format("{0}", Attributes.GetDataTypeId(nodesToRead[ii].AttributeId));
item.Value = Utils.Format("{0}", results[ii].StatusCode);
}
// display the value.
else
{
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
item.Type = typeInfo.BuiltInType.ToString();
if (typeInfo.ValueRank >= ValueRanks.OneOrMoreDimensions)
{
item.Type += "[]";
}
item.Value = results[ii].Value;//Utils.Format("{0}", results[ii].Value);
}
}
// process property value.
else
{
// ignore properties which are invalid for the node.
if (results[ii].StatusCode == StatusCodes.BadNodeIdUnknown)
{
continue;
}
// get the name of the property.
item.Name = Utils.Format("{0}", references[ii - startOfProperties]);
// display any unexpected error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
item.Type = String.Empty;
item.Value = Utils.Format("{0}", results[ii].StatusCode);
}
// display the value.
else
{
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
item.Type = typeInfo.BuiltInType.ToString();
if (typeInfo.ValueRank >= ValueRanks.OneOrMoreDimensions)
{
item.Type += "[]";
}
item.Value = results[ii].Value; //Utils.Format("{0}", results[ii].Value);
}
}
nodeAttribute.Add(item);
}
return(nodeAttribute.ToArray());
}
/// <summary>
/// 根据ID号查询节点属性
/// 0:NodeClass 1:Value 2:AccessLevel 3:DisplayName 4:Description
/// </summary>
/// <param name="nodeIds"></param>
/// <returns></returns>
private OpcNodeAttribute ReadOneNodeFiveAttribute(NodeId nodeId)
{
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
NodeId sourceId = nodeId;
nodesToRead.Add(new ReadValueId()
{
NodeId = sourceId,
AttributeId = Attributes.NodeClass
});
nodesToRead.Add(new ReadValueId()
{
NodeId = sourceId,
AttributeId = Attributes.Value
});
nodesToRead.Add(new ReadValueId()
{
NodeId = sourceId,
AttributeId = Attributes.AccessLevel
});
nodesToRead.Add(new ReadValueId()
{
NodeId = sourceId,
AttributeId = Attributes.DisplayName
});
nodesToRead.Add(new ReadValueId()
{
NodeId = sourceId,
AttributeId = Attributes.Description
});
// read all values.
base.Session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out DataValueCollection results,
out DiagnosticInfoCollection diagnosticInfos);
try
{
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
DataValue[] dataValues = results.ToArray();
OpcNodeAttribute attribute = new OpcNodeAttribute();
NodeClass? nodeclass = dataValues[0].WrappedValue.Value == null ? new NodeClass() : ((NodeClass)dataValues[0].WrappedValue.Value);
ClientBase.ValidateResponse(results, nodesToRead);
var description = "";
var name = dataValues[3].WrappedValue.Value.ToString();
var accessLevel = GetDiscriptionFromAccessLevel(dataValues[2]);
object type;
object value;
if (nodeclass == NodeClass.Object)
{
value = "";
type = nodeclass.ToString();
}
else if (nodeclass == NodeClass.Method)
{
value = "";
type = nodeclass.ToString();
}
else if (nodeclass == NodeClass.Variable)
{
DataValue dataValue = dataValues[1];
if (dataValue.WrappedValue.TypeInfo != null)
{
type = dataValue.WrappedValue.TypeInfo.BuiltInType;
// type = dataValue.Value.GetType().ToString();
if (dataValue.WrappedValue.TypeInfo.ValueRank == ValueRanks.Scalar)
{
value = dataValue.WrappedValue.Value;
}
else if (dataValue.WrappedValue.TypeInfo.ValueRank == ValueRanks.OneDimension)
{
value = dataValue.Value.GetType().ToString();
}
else if (dataValue.WrappedValue.TypeInfo.ValueRank == ValueRanks.TwoDimensions)
{
value = dataValue.Value.GetType().ToString();
}
else
{
value = dataValue.Value.GetType().ToString();
}
}
else
{
value = dataValue.Value;
type = "null";
}
}
else
{
value = "";
type = nodeclass.ToString();
}
if (dataValues[4].WrappedValue.Value != null)
{
description = dataValues[4].WrappedValue.Value.ToString();
}
return(new OpcNodeAttribute {
Name = name, Value = value, Type = type, Description = description, NodeClass = nodeclass.ToString(), AccessLevel = accessLevel
});
}
catch (Exception e)
{
return(null);
}
}
