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Added possibility to change the namespace index #4

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78 changes: 64 additions & 14 deletions OPCUaClient/UaClient.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,11 @@ public bool IsConnected
return this.Session.Connected;
}
}

/// <summary>
/// Namespace index (namespace index = n1 in ns=n1;s=n2).
/// </summary>
public ushort NamespaceIndex { get; set; } = 2;
#endregion

#region Public methods
Expand Down Expand Up @@ -256,6 +261,51 @@ public void Disconnect()
}
}

/// <summary>Set the namespace index using an identifier.</summary>
/// <param name="identifier">BrowseName of the OPC-UA object.</param>
public void SetNamespaceIndexFromIdentifier(string identifier)
{
this.Session.Browse(
null,
null,
Opc.Ua.ObjectIds.ObjectsFolder,
0u,
BrowseDirection.Forward,
ReferenceTypeIds.HierarchicalReferences,
true,
(uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method,
out byte[] continuationPoint,
out ReferenceDescriptionCollection refdescs);

foreach (var item in refdescs)
{
if (item.DisplayName.Text.Equals(identifier))
{
this.NamespaceIndex = item.BrowseName.NamespaceIndex;
return;
}
}
throw new ArgumentException("Namespace index not found for identifier: ", nameof(identifier));
}

/// <summary>Set the namespace index using the namespace uri.</summary>
/// <param name="uri">The namespace uri </param>
public void SetNamespaceIndexFromUri(string uri)
{
//Get the namespace index of the specified namespace uri
int namespaceIndex = this.Session.NamespaceUris.GetIndex(uri);
//If the namespace uri doesn't exist, namespace index is -1
if (namespaceIndex >= 0)
{
this.NamespaceIndex = (ushort)namespaceIndex;
}
else
{
throw new ArgumentException("Namespace index not found for uri: ", nameof(uri));

}
}


/// <summary>
/// Write a value on a tag
Expand All @@ -273,7 +323,7 @@ public void Write(String address, Object value)
WriteValueCollection writeValues = new WriteValueCollection();
var writeValue = new WriteValue
{
NodeId = new NodeId(address, 2),
NodeId = new NodeId(address, this.NamespaceIndex),
AttributeId = Attributes.Value,
Value = new DataValue()
};
Expand Down Expand Up @@ -319,7 +369,7 @@ public Tag Read(String address)
{
new ReadValueId
{
NodeId = new NodeId(address, 2),
NodeId = new NodeId(address, this.NamespaceIndex),
AttributeId = Attributes.Value
}
};
Expand All @@ -335,7 +385,7 @@ public Tag Read(String address)


/// <summary>
/// Write a lis of values
/// Write a list of values
/// </summary>
/// <param name="tags"> <see cref="Tag"/></param>
/// <exception cref="WriteException"></exception>
Expand All @@ -347,7 +397,7 @@ public void Write(List<Tag> tags)

writeValues.AddRange(tags.Select(tag => new WriteValue
{
NodeId = new NodeId(tag.Address, 2),
NodeId = new NodeId(tag.Address, this.NamespaceIndex),
AttributeId = Attributes.Value,
Value = new DataValue()
{
Expand Down Expand Up @@ -383,7 +433,7 @@ public List<Tag> Read(List<String> address)
ReadValueIdCollection readValues = new ReadValueIdCollection();
readValues.AddRange(address.Select(a => new ReadValueId
{
NodeId = new NodeId(a, 2),
NodeId = new NodeId(a, this.NamespaceIndex),
AttributeId = Attributes.Value
}));

Expand Down Expand Up @@ -419,7 +469,7 @@ public void Monitoring(String address, int miliseconds, MonitoredItemNotificatio
{
var subscription = this.Subscription(miliseconds);
MonitoredItem monitored = new MonitoredItem();
monitored.StartNodeId = new NodeId(address, 2);
monitored.StartNodeId = new NodeId(address, this.NamespaceIndex);
monitored.AttributeId = Attributes.Value;
monitored.Notification += monitor;
subscription.AddItem(monitored);
Expand Down Expand Up @@ -482,7 +532,7 @@ public List<Group> Groups(String address, bool recursive = false)
browser.NodeClassMask = (int)NodeClass.Object | (int)NodeClass.Variable;
browser.ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences;

ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, 2));
ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, this.NamespaceIndex));
foreach (var result in browseResults)
{
if (result.NodeClass == NodeClass.Object)
Expand Down Expand Up @@ -522,7 +572,7 @@ public List<Tag> Tags(String address)
browser.NodeClassMask = (int)NodeClass.Object | (int)NodeClass.Variable;
browser.ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences;

ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, 2));
ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, this.NamespaceIndex));
foreach (var result in browseResults)
{
if (result.NodeClass == NodeClass.Variable)
Expand Down Expand Up @@ -600,7 +650,7 @@ public Task<List<Group>> GroupsAsync(String address, bool recursive = false)
browser.NodeClassMask = (int)NodeClass.Object | (int)NodeClass.Variable;
browser.ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences;

ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, 2));
ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, this.NamespaceIndex));
foreach (var result in browseResults)
{
if (result.NodeClass == NodeClass.Object)
Expand Down Expand Up @@ -643,7 +693,7 @@ public Task<List<Tag>> TagsAsync(String address)
browser.NodeClassMask = (int)NodeClass.Object | (int)NodeClass.Variable;
browser.ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences;

ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, 2));
ReferenceDescriptionCollection browseResults = browser.Browse(new NodeId(address, this.NamespaceIndex));
foreach (var result in browseResults)
{
if (result.NodeClass == NodeClass.Variable)
Expand Down Expand Up @@ -676,7 +726,7 @@ public async Task<Tag> WriteAsync(String address, Object value)
WriteValueCollection writeValues = new WriteValueCollection();
var writeValue = new WriteValue
{
NodeId = new NodeId(address, 2),
NodeId = new NodeId(address, this.NamespaceIndex),
AttributeId = Attributes.Value,
Value = new DataValue()
};
Expand Down Expand Up @@ -720,7 +770,7 @@ public async Task<List<Tag>> WriteAsync(List<Tag> tags)

writeValues.AddRange(tags.Select(tag => new WriteValue
{
NodeId = new NodeId(tag.Address, 2),
NodeId = new NodeId(tag.Address, this.NamespaceIndex),
AttributeId = Attributes.Value,
Value = new DataValue()
{
Expand Down Expand Up @@ -760,7 +810,7 @@ public async Task<Tag> ReadAsync(String address)
{
new ReadValueId
{
NodeId = new NodeId(address, 2),
NodeId = new NodeId(address, this.NamespaceIndex),
AttributeId = Attributes.Value
}
};
Expand Down Expand Up @@ -790,7 +840,7 @@ public async Task<List<Tag>> ReadAsync(List<String> address)
ReadValueIdCollection readValues = new ReadValueIdCollection();
readValues.AddRange(address.Select(a => new ReadValueId
{
NodeId = new NodeId(a, 2),
NodeId = new NodeId(a, this.NamespaceIndex),
AttributeId = Attributes.Value
}));

Expand Down
15 changes: 15 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,21 @@ dotnet add package OPCUaClient
```


### Change the namespace index (default namespace index is 2)

```cs
// Fixed namespace index
client.NamespaceIndex = 3;

// From URI
client.SetNamespaceIndexFromUri("urn://N44/Ua/Device1");

// From identifier
client.SetNamespaceIndexFromIdentifier("ua-server-identifier");

```


### Read a tag

```cs
Expand Down