| Name | Description | |
|---|---|---|
 | DAReadParameters Constructor | Overloaded. Initializes a new instance of the DAReadParameters class. |
OPC Studio User's Guide and Reference
DAReadParameters Class Members
The following tables list the members exposed by DAReadParameters.
| Name | Description | |
|---|---|---|
| DAReadParameters Constructor | Overloaded. Initializes a new instance of the DAReadParameters class. |
| Name | Description | |
|---|---|---|
 | DefaultDataSource | The default data source. Equals to DADataSource.ByValueAge.
The value of this constant is DADataSource.ByValueAge. |
| DefaultValueAge | The default value age (in milliseconds). Equals to 1000, i.e. 1 second.
The value of this constant is 1000. |
| Name | Description | |
|---|---|---|
  | CacheSource | Read parameters that specify the cache data source. |
| DataSource | Selects the data source for OPC reads (from device, from OPC cache, or dynamically determined). |
| Default | Default read parameters. |
| DeviceSource | Read parameters that specify the device data source. |
| StandardName | A symbolic name of the current parameter combination if it has a standard name. Empty otherwise. (Inherited from OpcLabs.BaseLib.Parameters) |
| ValueAge | Determines the age of value you would like to obtain (in milliseconds). |
| Name | Description | |
|---|---|---|
 | Clone | Overridden. |
| Equals | Overloaded. Determines whether the specified DAReadParameters is equal to the current object. |
| FromDADataSource | Converts a DADataSource to a DAReadParameters object. |
| FromInt32 | Converts a value age (integer, in milliseconds) to a DAReadParameters object. |
| GetHashCode | Overridden. |
| GetObjectData | Overridden. |
| GetSchema | (Inherited from OpcLabs.BaseLib.Info) |
| GetType | Gets the System.Type of the current instance. (Inherited from object) |
| ReadXml | (Inherited from OpcLabs.BaseLib.Info) |
| ToString | Overridden. |
| WriteXml | (Inherited from OpcLabs.BaseLib.Info) |
| Name | Description | |
|---|---|---|
 | CopyFrom | Infrastructure. Copies data from the specified parameter object into the current parameter object. (Inherited from OpcLabs.BaseLib.Parameters) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from object) |
| GetDefaultStandardName | Indicates the standard name for the default combination of parameters. (Inherited from OpcLabs.BaseLib.Parameters) |
| GetStandardNameValues | Returns a collection of standard values for the OpcLabs.BaseLib.Parameters.StandardName property. (Inherited from OpcLabs.BaseLib.Parameters) |
| MakeString | Infrastructure. (Inherited from OpcLabs.BaseLib.Parameters) |
| MemberwiseClone | Creates a shallow copy of the current System.Object. (Inherited from object) |
| OnPropertyChanged | Infrastructure. |
| ReadXmlElement | Overridden. Infrastructure. |
| WriteXmlElement | Overridden. Infrastructure. |
| Name | Description | |
|---|---|---|
 | SetState<TNode> | Sets the arbitrary object associated with the node. |
| Name | Description | |
|---|---|---|
 | PropertyChanged | Handler for System.ComponentModel.INotifyPropertyChanged.PropertyChanged. |
 Equality | Determines whether the two objects are equal. |
| Implicit Type Conversion | Overloaded. Converts a DADataSource to a DAReadParameters object. |
| Inequality | Determines whether the two objects are not equal. |