protected override OpcVariableValue <object> WriteVariableValueCore(
OpcWriteVariableValueContext context,
OpcVariableValue <object> value)
{
if (!this.manager.CanWrite(this, context.Identity))
{
throw new OpcException(OpcStatusCode.BadNotWritable);
}
return(base.WriteVariableValueCore(context, value));
}
private static OpcVariableValue <object> WriteDataProcessed(
OpcWriteVariableValueContext context,
OpcVariableValue <object> value)
{
if (value.Value is bool condition && condition)
{
dataProcessed.Release();
}
// Reset DataProcessed
return(new OpcVariableValue <object>(false));
}
private OpcVariableValue <object> HandleWriteVariableValue(
OpcWriteVariableValueContext context,
OpcVariableValue <object> value)
{
if (context.Identity != null)
{
Console.WriteLine(
"\t[{0} (SID='{1}')] Write: {2}.Value = '{3}'",
context.Identity?.DisplayName,
context.SessionId?.Value,
context.Node.Name,
value.Value);
}
return(value);
}
private OpcVariableValue <object> HandleWriteVariableValue(
OpcWriteVariableValueContext context,
OpcVariableValue <object> value)
{
// A client may not pass a timestamp associated with a new value or may use the same
// timestamp as already used by the variable node.
//
// Upon we want to enforce that every value written to the node uses its own timestamp
// we update the variable value with the current time to assure that every write
// results into a new entry in the history of the node.
if (value.Timestamp == null || value.Timestamp == context.Node.Timestamp)
{
value = new OpcVariableValue <object>(value.Value, DateTime.UtcNow, value.Status);
}
return(value);
}
private OpcVariableValue WriteVariableValueCallback(OpcWriteVariableValueContext context, OpcVariableValue value)
{
UpdateVariables();
return(value);
}
private OpcVariableValue WriteMatlabVariableValueCallback(OpcWriteVariableValueContext context, OpcVariableValue value)
{
try
{
string variableName = context.Node.Name.SymbolicName;
string variableValueAsString = value.Value.ToString();
double n;
bool isNumeric = double.TryParse(variableValueAsString, out n);
if (isNumeric)
{
_matlabService.Matlab.Execute(string.Format("{0} = {1}", variableName, variableValueAsString));
}
else
{
_matlabService.Matlab.Execute(string.Format("{0} = '{1}'", variableName, variableValueAsString));
}
UpdateVariables();
}
catch (Exception ex)
{
Console.WriteLine("Something went wrong while modifying variable:{0}{1}{0}{2}", Environment.NewLine, ex.Message, ex.StackTrace);
}
return(value);
}
