| public ReadVariant ( string fieldName ) : Variant | ||
| fieldName | string | |
| return | Variant | |
/// <summary>
/// Updates the attributes from the stream.
/// </summary>
/// <param name="context">The context for the system being accessed.</param>
/// <param name="decoder">The decoder wrapping the stream to read.</param>
public override void Update(ISystemContext context, XmlDecoder decoder)
{
base.Update(context, decoder);
decoder.PushNamespace(Namespaces.OpcUaXsd);
if (decoder.Peek("Value"))
{
WrappedValue = decoder.ReadVariant("Value");
}
if (decoder.Peek("DataType"))
{
DataType = decoder.ReadNodeId("DataType");
}
if (decoder.Peek("ValueRank"))
{
ValueRank = decoder.ReadInt32("ValueRank");
}
if (decoder.Peek("ArrayDimensions"))
{
ArrayDimensions = BaseVariableState.ArrayDimensionsFromXml(decoder.ReadString("ArrayDimensions"));
}
decoder.PopNamespace();
}
/// <summary>
/// Extracts a BuiltInType value from the line.
/// </summary>
private bool ExtractField(int lineCount, ref string line, ServiceMessageContext context, BuiltInType valueType, out Variant value)
{
value = Variant.Null;
string field = line;
if (field == null)
{
return true;
}
if (valueType == BuiltInType.Null)
{
return true;
}
StringBuilder builder = new StringBuilder();
builder.AppendFormat("<Value xmlns=\"{0}\">", Opc.Ua.Namespaces.OpcUaXsd);
builder.AppendFormat("<{0}>", valueType);
builder.Append(line);
builder.AppendFormat("</{0}>", valueType);
builder.Append("</Value>");
XmlDocument document = new XmlDocument();
document.InnerXml = builder.ToString();
try
{
XmlDecoder decoder = new XmlDecoder(document.DocumentElement, context);
value = decoder.ReadVariant(null);
}
catch (Exception e)
{
Utils.Trace("PARSE ERROR [Line:{0}] - '{1}': {2}", lineCount, field, e.Message);
return false;
}
return true;
}