ComputedValue Class |
Represents an attribute value that's computed at runtime.
Inheritance HierarchySystemObject
Demo3D.PLC.Comms.AttrDbAttributeProperties
Demo3D.PLC.Comms.AttrDbAttributeValue
Demo3D.PLC.Comms.AttrDbComputedValue
Demo3D.PLC.Comms.AttrDbAttributeProperties
Demo3D.PLC.Comms.AttrDbAttributeValue
Demo3D.PLC.Comms.AttrDbComputedValue
Namespace: Demo3D.PLC.Comms.AttrDb
Assembly: PLC (in PLC.dll) Version: 15.0.2.11458
SyntaxC#
public abstract class ComputedValue : AttributeValue
The ComputedValue type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | ComputedValue |
Constructs a ComputedValue.
|
Properties| Name | Description | |
|---|---|---|
 | AttributeId |
Attribute ID.
(Inherited from AttributeProperties.) |
| Dimensions |
The dimensions of the value (or null).
(Overrides AttributeValueDimensions.) |
| FixedSize |
True if the value size is fixed.
(Inherited from AttributeProperties.) |
| Flags |
Attribute value flags.
(Inherited from AttributeProperties.) |
| GetAttributesAll |
The attribute data is returned in a GetAttributesAll request.
(Inherited from AttributeProperties.) |
| Gettable |
True if protocol attribute-get requests are allowed.
(Inherited from AttributeProperties.) |
| IgnoreSet |
True if protocol attribute-set requests are allowed, but should be ignored.
(Inherited from AttributeProperties.) |
| NotSupported |
The attribute is not supported.
(Inherited from AttributeProperties.) |
| NumBytes |
The number of bytes of attribute data (or -1).
(Inherited from AttributeValue.) |
| Settable |
True if protocol attribute-set requests are allowed.
(Inherited from AttributeProperties.) |
Methods| Name | Description | |
|---|---|---|
| AddOnAttributeValueSet |
Add a handler for the OnAttributeValueSet event.
(Inherited from AttributeValue.) |
 | GetValue(MessageContextBase, IPacketWriter) |
When overriden in a derived class, computes and returns the current value.
|
| GetValue(MessageContextBase, ArraySegmentByte) |
Protocol access to the attribute value.
Honours Gettable.
(Overrides AttributeValueGetValue(MessageContextBase, ArraySegmentByte).) |
| GetValue(MessageContextBase, IPacketWriter, DataSelect) |
Protocol access to the attribute value.
Honours Gettable.
(Overrides AttributeValueGetValue(MessageContextBase, IPacketWriter, DataSelect).) |
| NotifyAttributeValueSet |
Raises the OnAttributeValueSet event.
(Inherited from AttributeValue.) |
| ReadByte |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadByte.) |
| ReadBytes(ArraySegmentByte) |
Read data out of the attribute value into the specified buffer.
(Overrides AttributeValueReadBytes(ArraySegmentByte).) |
| ReadBytes(Int32) |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadBytes(Int32).) |
| ReadDoubleLE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadDoubleLE.) |
| ReadInt16LE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadInt16LE.) |
| ReadInt32LE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadInt32LE.) |
| ReadInt64LE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadInt64LE.) |
| ReadSingleLE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadSingleLE.) |
| ReadString |
Reads the attribute value from the specified offset and returns the data as a value.
(Overrides AttributeValueReadString(BinaryTextEncoding).) |
| ReadUInt16LE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadUInt16LE.) |
| ReadUInt32LE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadUInt32LE.) |
| ReadUInt64LE |
Reads the attribute value and returns the data as a value.
(Overrides AttributeValueReadUInt64LE.) |
| RemoveOnAttributeValueSet |
Remove a handler from the OnAttributeValueSet event.
(Inherited from AttributeValue.) |
| SetValue(MessageContextBase, IPacketWriter, IPacketReader) |
When overriden in a derived class, updates the current value.
|
| SetValue(MessageContextBase, ArraySegmentByte, Boolean) | (Overrides AttributeValueSetValue(MessageContextBase, ArraySegmentByte, Boolean).) |
| SetValue(MessageContextBase, IPacketWriter, IPacketReader, DataSelect, Boolean) | (Overrides AttributeValueSetValue(MessageContextBase, IPacketWriter, IPacketReader, DataSelect, Boolean).) |
| WriteByte |
Write a value to the attribute value.
(Overrides AttributeValueWriteByte(Byte).) |
| WriteBytes |
Write data into the attribute value from the specified buffer.
(Overrides AttributeValueWriteBytes(ArraySegmentByte).) |
| WriteDoubleLE |
Write a value to the attribute value.
(Overrides AttributeValueWriteDoubleLE(Double).) |
| WriteInt16LE |
Write a value to the attribute value.
(Overrides AttributeValueWriteInt16LE(Int16).) |
| WriteInt32LE |
Write a value to the attribute value.
(Overrides AttributeValueWriteInt32LE(Int32).) |
| WriteInt64LE |
Write a value to the attribute value.
(Overrides AttributeValueWriteInt64LE(Int64).) |
| WriteSingleLE |
Write a value to the attribute value.
(Overrides AttributeValueWriteSingleLE(Single).) |
| WriteString |
Write a value to the attribute value.
(Overrides AttributeValueWriteString(BinaryString, BinaryTextEncoding).) |
| WriteUInt16LE |
Write a value to the attribute value.
(Overrides AttributeValueWriteUInt16LE(UInt16).) |
| WriteUInt32LE |
Write a value to the attribute value.
(Overrides AttributeValueWriteUInt32LE(UInt32).) |
| WriteUInt64LE |
Write a value to the attribute value.
(Overrides AttributeValueWriteUInt64LE(UInt64).) |
Events| Name | Description | |
|---|---|---|
 | OnAttributeValueSet |
Occurs when the attribute value is set, but only under certain circumstances (see remarks).
(Inherited from AttributeValue.) |
See Also